From: Nicolas Koenig Date: Wed, 25 Jul 2018 18:48:39 +0000 (+0000) Subject: re PR fortran/25829 ([F03] Asynchronous IO support) X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=b1f45884f676cd5bde92d6babac2e8d44629f5ac;p=gcc.git re PR fortran/25829 ([F03] Asynchronous IO support) 2018-07-25 Nicolas Koenig Thomas Koenig PR fortran/25829 * gfortran.texi: Add description of asynchronous I/O. * trans-decl.c (gfc_finish_var_decl): Treat asynchronous variables as volatile. * trans-io.c (gfc_build_io_library_fndecls): Rename st_wait to st_wait_async and change argument spec from ".X" to ".w". (gfc_trans_wait): Pass ID argument via reference. 2018-07-25 Nicolas Koenig Thomas Koenig PR fortran/25829 * gfortran.dg/f2003_inquire_1.f03: Add write statement. * gfortran.dg/f2003_io_1.f03: Add wait statement. 2018-07-25 Nicolas Koenig Thomas Koenig PR fortran/25829 * Makefile.am: Add async.c to gfor_io_src. Add async.h to gfor_io_headers. * Makefile.in: Regenerated. * gfortran.map: Add _gfortran_st_wait_async. * io/async.c: New file. * io/async.h: New file. * io/close.c: Include async.h. (st_close): Call async_wait for an asynchronous unit. * io/file_pos.c (st_backspace): Likewise. (st_endfile): Likewise. (st_rewind): Likewise. (st_flush): Likewise. * io/inquire.c: Add handling for asynchronous PENDING and ID arguments. * io/io.h (st_parameter_dt): Add async bit. (st_parameter_wait): Correct. (gfc_unit): Add au pointer. (st_wait_async): Add prototype. (transfer_array_inner): Likewise. (st_write_done_worker): Likewise. * io/open.c: Include async.h. (new_unit): Initialize asynchronous unit. * io/transfer.c (async_opt): New struct. (wrap_scalar_transfer): New function. (transfer_integer): Call wrap_scalar_transfer to do the work. (transfer_real): Likewise. (transfer_real_write): Likewise. (transfer_character): Likewise. (transfer_character_wide): Likewise. (transfer_complex): Likewise. (transfer_array_inner): New function. (transfer_array): Call transfer_array_inner. (transfer_derived): Call wrap_scalar_transfer. (data_transfer_init): Check for asynchronous I/O. Perform a wait operation on any pending asynchronous I/O if the data transfer is synchronous. Copy PDT and enqueue thread for data transfer. (st_read_done_worker): New function. (st_read_done): Enqueue transfer or call st_read_done_worker. (st_write_done_worker): New function. (st_write_done): Enqueue transfer or call st_read_done_worker. (st_wait): Document as no-op for compatibility reasons. (st_wait_async): New function. * io/unit.c (insert_unit): Use macros LOCK, UNLOCK and TRYLOCK; add NOTE where necessary. (get_gfc_unit): Likewise. (init_units): Likewise. (close_unit_1): Likewise. Call async_close if asynchronous. (close_unit): Use macros LOCK and UNLOCK. (finish_last_advance_record): Likewise. (newunit_alloc): Likewise. * io/unix.c (find_file): Likewise. (flush_all_units_1): Likewise. (flush_all_units): Likewise. * libgfortran.h (generate_error_common): Add prototype. * runtime/error.c: Include io.h and async.h. (generate_error_common): New function. 2018-07-25 Nicolas Koenig Thomas Koenig PR fortran/25829 * testsuite/libgomp.fortran/async_io_1.f90: New test. * testsuite/libgomp.fortran/async_io_2.f90: New test. * testsuite/libgomp.fortran/async_io_3.f90: New test. * testsuite/libgomp.fortran/async_io_4.f90: New test. * testsuite/libgomp.fortran/async_io_5.f90: New test. * testsuite/libgomp.fortran/async_io_6.f90: New test. * testsuite/libgomp.fortran/async_io_7.f90: New test. Co-Authored-By: Thomas Koenig From-SVN: r262978 --- diff --git a/gcc/fortran/ChangeLog b/gcc/fortran/ChangeLog index 27d57eb2fb1..94b63b71e2a 100644 --- a/gcc/fortran/ChangeLog +++ b/gcc/fortran/ChangeLog @@ -1,3 +1,14 @@ +2018-07-25 Nicolas Koenig + Thomas Koenig + + PR fortran/25829 + * gfortran.texi: Add description of asynchronous I/O. + * trans-decl.c (gfc_finish_var_decl): Treat asynchronous variables + as volatile. + * trans-io.c (gfc_build_io_library_fndecls): Rename st_wait to + st_wait_async and change argument spec from ".X" to ".w". + (gfc_trans_wait): Pass ID argument via reference. + 2018-07-20 Martin Sebor PR middle-end/82063 diff --git a/gcc/fortran/gfortran.texi b/gcc/fortran/gfortran.texi index d6bb7aae494..39200027305 100644 --- a/gcc/fortran/gfortran.texi +++ b/gcc/fortran/gfortran.texi @@ -879,8 +879,7 @@ than @code{(/.../)}. Type-specification for array constructors like @item Extensions to the specification and initialization expressions, including the support for intrinsics with real and complex arguments. -@item Support for the asynchronous input/output syntax; however, the -data transfer is currently always synchronously performed. +@item Support for the asynchronous input/output. @item @cindex @code{FLUSH} statement @@ -1183,6 +1182,7 @@ might in some way or another become visible to the programmer. * Files opened without an explicit ACTION= specifier:: * File operations on symbolic links:: * File format of unformatted sequential files:: +* Asynchronous I/O:: @end menu @@ -1486,6 +1486,20 @@ program main end program main @end smallexample +@node Asynchronous I/O +@section Asynchronous I/O +@cindex input/output, asynchronous +@cindex asynchronous I/O + +Asynchronous I/O is supported if the program is linked against the +POSIX thread library. If that is not the case, all I/O is performed +as synchronous. + +On some systems, such as Darwin or Solaris, the POSIX thread library +is always linked in, so asynchronous I/O is always performed. On other +sytems, such as Linux, it is necessary to specify @option{-pthread}, +@option{-lpthread} or @option{-fopenmp} during the linking step. + @c --------------------------------------------------------------------- @c Extensions @c --------------------------------------------------------------------- diff --git a/gcc/fortran/trans-decl.c b/gcc/fortran/trans-decl.c index 08c1ebd2d4b..eea6b81ebfa 100644 --- a/gcc/fortran/trans-decl.c +++ b/gcc/fortran/trans-decl.c @@ -698,7 +698,8 @@ gfc_finish_var_decl (tree decl, gfc_symbol * sym) && CLASS_DATA (sym)->ts.u.derived->attr.has_dtio_procs))) TREE_STATIC (decl) = 1; - if (sym->attr.volatile_) + /* Treat asynchronous variables the same as volatile, for now. */ + if (sym->attr.volatile_ || sym->attr.asynchronous) { TREE_THIS_VOLATILE (decl) = 1; TREE_SIDE_EFFECTS (decl) = 1; diff --git a/gcc/fortran/trans-io.c b/gcc/fortran/trans-io.c index 2626c4651e2..88dbcb80a85 100644 --- a/gcc/fortran/trans-io.c +++ b/gcc/fortran/trans-io.c @@ -438,10 +438,9 @@ gfc_build_io_library_fndecls (void) get_identifier (PREFIX("st_iolength")), ".w", void_type_node, 1, dt_parm_type); - /* TODO: Change when asynchronous I/O is implemented. */ parm_type = build_pointer_type (st_parameter[IOPARM_ptype_wait].type); iocall[IOCALL_WAIT] = gfc_build_library_function_decl_with_spec ( - get_identifier (PREFIX("st_wait")), ".X", + get_identifier (PREFIX("st_wait_async")), ".w", void_type_node, 1, parm_type); parm_type = build_pointer_type (st_parameter[IOPARM_ptype_filepos].type); @@ -1527,7 +1526,7 @@ gfc_trans_wait (gfc_code * code) mask |= IOPARM_common_err; if (p->id) - mask |= set_parameter_value (&block, var, IOPARM_wait_id, p->id); + mask |= set_parameter_ref (&block, &post_block, var, IOPARM_wait_id, p->id); set_parameter_const (&block, var, IOPARM_common_flags, mask); diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 16027a791a2..f7b3866cd80 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,10 @@ +2018-07-25 Nicolas Koenig + Thomas Koenig + + PR fortran/25829 + * gfortran.dg/f2003_inquire_1.f03: Add write statement. + * gfortran.dg/f2003_io_1.f03: Add wait statement. + 2018-07-25 Jakub Jelinek PR c++/85515 diff --git a/gcc/testsuite/gfortran.dg/f2003_inquire_1.f03 b/gcc/testsuite/gfortran.dg/f2003_inquire_1.f03 index e51f619c863..957cdae5276 100644 --- a/gcc/testsuite/gfortran.dg/f2003_inquire_1.f03 +++ b/gcc/testsuite/gfortran.dg/f2003_inquire_1.f03 @@ -7,10 +7,12 @@ logical :: vpending open(10, file='mydata_f2003_inquire_1', asynchronous="yes", blank="null", & & decimal="comma", encoding="utf-8", sign="plus") +write (10,*, asynchronous="yes", id=vid) 'asdf' +wait (10) + inquire(unit=10, round=sround, sign=ssign, size=vsize, id=vid, & & pending=vpending, asynchronous=sasynchronous, decimal=sdecimal, & & encoding=sencoding) - if (ssign.ne."PLUS") STOP 1 if (sasynchronous.ne."YES") STOP 2 if (sdecimal.ne."COMMA") STOP 3 diff --git a/gcc/testsuite/gfortran.dg/f2003_io_1.f03 b/gcc/testsuite/gfortran.dg/f2003_io_1.f03 index 8021d7906fd..8c7fb4b994d 100644 --- a/gcc/testsuite/gfortran.dg/f2003_io_1.f03 +++ b/gcc/testsuite/gfortran.dg/f2003_io_1.f03 @@ -13,6 +13,7 @@ open(10, file='mydata_f2003_io_1', asynchronous="yes", blank="null") write(10,'(10f8.3)', asynchronous="yes", decimal="comma", id=j) a rewind(10) read(10,'(10f8.3)', asynchronous="yes", decimal="comma", blank="zero") b +wait(10) if (any(b.ne.23.45)) STOP 1 c = 3.14 @@ -24,6 +25,7 @@ rewind(10) write(10,'(10f8.3)', asynchronous="yes", decimal="point") a rewind(10) read(10,'(10f8.3)', asynchronous="yes", decimal="point") b +wait (10) if (any(b.ne.23.45)) STOP 3 wait(unit=10, err=25, iostat=istat, iomsg=msg, end=35, id=j) diff --git a/libgfortran/ChangeLog b/libgfortran/ChangeLog index dbfc5d35342..e895df751f7 100644 --- a/libgfortran/ChangeLog +++ b/libgfortran/ChangeLog @@ -1,3 +1,65 @@ +2018-07-25 Nicolas Koenig + Thomas Koenig + + PR fortran/25829 + * Makefile.am: Add async.c to gfor_io_src. + Add async.h to gfor_io_headers. + * Makefile.in: Regenerated. + * gfortran.map: Add _gfortran_st_wait_async. + * io/async.c: New file. + * io/async.h: New file. + * io/close.c: Include async.h. + (st_close): Call async_wait for an asynchronous unit. + * io/file_pos.c (st_backspace): Likewise. + (st_endfile): Likewise. + (st_rewind): Likewise. + (st_flush): Likewise. + * io/inquire.c: Add handling for asynchronous PENDING + and ID arguments. + * io/io.h (st_parameter_dt): Add async bit. + (st_parameter_wait): Correct. + (gfc_unit): Add au pointer. + (st_wait_async): Add prototype. + (transfer_array_inner): Likewise. + (st_write_done_worker): Likewise. + * io/open.c: Include async.h. + (new_unit): Initialize asynchronous unit. + * io/transfer.c (async_opt): New struct. + (wrap_scalar_transfer): New function. + (transfer_integer): Call wrap_scalar_transfer to do the work. + (transfer_real): Likewise. + (transfer_real_write): Likewise. + (transfer_character): Likewise. + (transfer_character_wide): Likewise. + (transfer_complex): Likewise. + (transfer_array_inner): New function. + (transfer_array): Call transfer_array_inner. + (transfer_derived): Call wrap_scalar_transfer. + (data_transfer_init): Check for asynchronous I/O. + Perform a wait operation on any pending asynchronous I/O + if the data transfer is synchronous. Copy PDT and enqueue + thread for data transfer. + (st_read_done_worker): New function. + (st_read_done): Enqueue transfer or call st_read_done_worker. + (st_write_done_worker): New function. + (st_write_done): Enqueue transfer or call st_read_done_worker. + (st_wait): Document as no-op for compatibility reasons. + (st_wait_async): New function. + * io/unit.c (insert_unit): Use macros LOCK, UNLOCK and TRYLOCK; + add NOTE where necessary. + (get_gfc_unit): Likewise. + (init_units): Likewise. + (close_unit_1): Likewise. Call async_close if asynchronous. + (close_unit): Use macros LOCK and UNLOCK. + (finish_last_advance_record): Likewise. + (newunit_alloc): Likewise. + * io/unix.c (find_file): Likewise. + (flush_all_units_1): Likewise. + (flush_all_units): Likewise. + * libgfortran.h (generate_error_common): Add prototype. + * runtime/error.c: Include io.h and async.h. + (generate_error_common): New function. + 2018-06-09 Jerry DeLisle PR libgfortran/86070 diff --git a/libgfortran/Makefile.am b/libgfortran/Makefile.am index 5831631ddfb..4ffc6cea780 100644 --- a/libgfortran/Makefile.am +++ b/libgfortran/Makefile.am @@ -100,7 +100,8 @@ io/transfer128.c \ io/unit.c \ io/unix.c \ io/write.c \ -io/fbuf.c +io/fbuf.c \ +io/async.c endif @@ -108,7 +109,8 @@ gfor_io_headers= \ io/io.h \ io/fbuf.h \ io/format.h \ -io/unix.h +io/unix.h \ +io/async.h gfor_helper_src= \ intrinsics/associated.c \ diff --git a/libgfortran/Makefile.in b/libgfortran/Makefile.in index b66a91bfde3..94c3524ffb9 100644 --- a/libgfortran/Makefile.in +++ b/libgfortran/Makefile.in @@ -70,7 +70,8 @@ target_triplet = @target@ @LIBGFOR_MINIMAL_FALSE@io/unit.c \ @LIBGFOR_MINIMAL_FALSE@io/unix.c \ @LIBGFOR_MINIMAL_FALSE@io/write.c \ -@LIBGFOR_MINIMAL_FALSE@io/fbuf.c +@LIBGFOR_MINIMAL_FALSE@io/fbuf.c \ +@LIBGFOR_MINIMAL_FALSE@io/async.c @LIBGFOR_MINIMAL_FALSE@am__append_3 = \ @LIBGFOR_MINIMAL_FALSE@intrinsics/access.c \ @@ -352,7 +353,7 @@ am__objects_47 = $(am__objects_4) $(am__objects_5) $(am__objects_6) \ @LIBGFOR_MINIMAL_FALSE@ inquire.lo intrinsics.lo list_read.lo \ @LIBGFOR_MINIMAL_FALSE@ lock.lo open.lo read.lo transfer.lo \ @LIBGFOR_MINIMAL_FALSE@ transfer128.lo unit.lo unix.lo write.lo \ -@LIBGFOR_MINIMAL_FALSE@ fbuf.lo +@LIBGFOR_MINIMAL_FALSE@ fbuf.lo async.lo am__objects_49 = size_from_kind.lo $(am__objects_48) @LIBGFOR_MINIMAL_FALSE@am__objects_50 = access.lo c99_functions.lo \ @LIBGFOR_MINIMAL_FALSE@ chdir.lo chmod.lo clock.lo cpu_time.lo \ @@ -650,7 +651,8 @@ gfor_io_headers = \ io/io.h \ io/fbuf.h \ io/format.h \ -io/unix.h +io/unix.h \ +io/async.h gfor_helper_src = intrinsics/associated.c intrinsics/abort.c \ intrinsics/args.c intrinsics/cshift0.c intrinsics/eoshift0.c \ @@ -1551,6 +1553,7 @@ distclean-compile: @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/any_l8.Plo@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/args.Plo@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/associated.Plo@am__quote@ +@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/async.Plo@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/backtrace.Plo@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/bessel_r10.Plo@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/bessel_r16.Plo@am__quote@ @@ -5814,6 +5817,13 @@ fbuf.lo: io/fbuf.c @AMDEP_TRUE@@am__fastdepCC_FALSE@ DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@ @am__fastdepCC_FALSE@ $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o fbuf.lo `test -f 'io/fbuf.c' || echo '$(srcdir)/'`io/fbuf.c +async.lo: io/async.c +@am__fastdepCC_TRUE@ $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT async.lo -MD -MP -MF $(DEPDIR)/async.Tpo -c -o async.lo `test -f 'io/async.c' || echo '$(srcdir)/'`io/async.c +@am__fastdepCC_TRUE@ $(am__mv) $(DEPDIR)/async.Tpo $(DEPDIR)/async.Plo +@AMDEP_TRUE@@am__fastdepCC_FALSE@ source='io/async.c' object='async.lo' libtool=yes @AMDEPBACKSLASH@ +@AMDEP_TRUE@@am__fastdepCC_FALSE@ DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@ +@am__fastdepCC_FALSE@ $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o async.lo `test -f 'io/async.c' || echo '$(srcdir)/'`io/async.c + associated.lo: intrinsics/associated.c @am__fastdepCC_TRUE@ $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT associated.lo -MD -MP -MF $(DEPDIR)/associated.Tpo -c -o associated.lo `test -f 'intrinsics/associated.c' || echo '$(srcdir)/'`intrinsics/associated.c @am__fastdepCC_TRUE@ $(am__mv) $(DEPDIR)/associated.Tpo $(DEPDIR)/associated.Plo diff --git a/libgfortran/gfortran.map b/libgfortran/gfortran.map index 78f8d7e9706..a303a2ef573 100644 --- a/libgfortran/gfortran.map +++ b/libgfortran/gfortran.map @@ -1483,3 +1483,8 @@ GFORTRAN_C99_8 { y1f; ynf; }; + +GFORTRAN_9 { + global: + _gfortran_st_wait_async; +}; diff --git a/libgfortran/io/async.c b/libgfortran/io/async.c new file mode 100644 index 00000000000..b32af16ccb4 --- /dev/null +++ b/libgfortran/io/async.c @@ -0,0 +1,483 @@ +/* Copyright (C) 2018 Free Software Foundation, Inc. + Contributed by Nicolas Koenig + + This file is part of the GNU Fortran runtime library (libgfortran). + + Libgfortran is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3, or (at your option) + any later version. + + Libgfortran is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + Under Section 7 of GPL version 3, you are granted additional + permissions described in the GCC Runtime Library Exception, version + 3.1, as published by the Free Software Foundation. + + You should have received a copy of the GNU General Public License and + a copy of the GCC Runtime Library Exception along with this program; + see the files COPYING3 and COPYING.RUNTIME respectively. If not, see + . */ + +#include "libgfortran.h" + +#define _GTHREAD_USE_COND_INIT_FUNC +#include "../../libgcc/gthr.h" +#include "io.h" +#include "fbuf.h" +#include "format.h" +#include "unix.h" +#include +#include + +#include + +#include "async.h" + +DEBUG_LINE (__thread const char *aio_prefix = MPREFIX); + +DEBUG_LINE (__gthread_mutex_t debug_queue_lock = __GTHREAD_MUTEX_INIT;) +DEBUG_LINE (aio_lock_debug *aio_debug_head = NULL;) + +/* Current unit for asynchronous I/O. Needed for error reporting. */ + +__thread gfc_unit *thread_unit = NULL; + +/* Queue entry for the asynchronous I/O entry. */ +typedef struct transfer_queue +{ + enum aio_do type; + struct transfer_queue *next; + struct st_parameter_dt *new_pdt; + transfer_args arg; + _Bool has_id; + int read_flag; +} transfer_queue; + +struct error { + st_parameter_dt *dtp; + int id; +}; + +/* Helper function to exchange the old vs. a new PDT. */ + +static void +update_pdt (st_parameter_dt **old, st_parameter_dt *new) { + st_parameter_dt *temp; + NOTE ("Changing pdts, current_unit = %p", (void *) (new->u.p.current_unit)); + temp = *old; + *old = new; + if (temp) + free (temp); +} + +/* Destroy an adv_cond structure. */ + +static void +destroy_adv_cond (struct adv_cond *ac) +{ + T_ERROR (__gthread_mutex_destroy, &ac->lock); + T_ERROR (__gthread_cond_destroy, &ac->signal); +} + +/* Function invoked as start routine for a new asynchronous I/O unit. + Contains the main loop for accepting requests and handling them. */ + +static void * +async_io (void *arg) +{ + DEBUG_LINE (aio_prefix = TPREFIX); + transfer_queue *ctq = NULL, *prev = NULL; + gfc_unit *u = (gfc_unit *) arg; + async_unit *au = u->au; + LOCK (&au->lock); + thread_unit = u; + au->thread = __gthread_self (); + while (true) + { + /* Main loop. At this point, au->lock is always held. */ + WAIT_SIGNAL_MUTEX (&au->work, au->tail != NULL, &au->lock); + LOCK (&au->lock); + ctq = au->head; + prev = NULL; + /* Loop over the queue entries until they are finished. */ + while (ctq) + { + if (prev) + free (prev); + prev = ctq; + if (!au->error.has_error) + { + UNLOCK (&au->lock); + + switch (ctq->type) + { + case AIO_WRITE_DONE: + NOTE ("Finalizing write"); + st_write_done_worker (au->pdt); + UNLOCK (&au->io_lock); + break; + + case AIO_READ_DONE: + NOTE ("Finalizing read"); + st_read_done_worker (au->pdt); + UNLOCK (&au->io_lock); + break; + + case AIO_DATA_TRANSFER_INIT: + NOTE ("Data transfer init"); + LOCK (&au->io_lock); + update_pdt (&au->pdt, ctq->new_pdt); + data_transfer_init_worker (au->pdt, ctq->read_flag); + break; + + case AIO_TRANSFER_SCALAR: + NOTE ("Starting scalar transfer"); + ctq->arg.scalar.transfer (au->pdt, ctq->arg.scalar.arg_bt, + ctq->arg.scalar.data, + ctq->arg.scalar.i, + ctq->arg.scalar.s1, + ctq->arg.scalar.s2); + break; + + case AIO_TRANSFER_ARRAY: + NOTE ("Starting array transfer"); + NOTE ("ctq->arg.array.desc = %p", + (void *) (ctq->arg.array.desc)); + transfer_array_inner (au->pdt, ctq->arg.array.desc, + ctq->arg.array.kind, + ctq->arg.array.charlen); + free (ctq->arg.array.desc); + break; + + case AIO_CLOSE: + NOTE ("Received AIO_CLOSE"); + goto finish_thread; + + default: + internal_error (NULL, "Invalid queue type"); + break; + } + LOCK (&au->lock); + if (unlikely (au->error.has_error)) + au->error.last_good_id = au->id.low - 1; + } + else + { + if (ctq->type == AIO_WRITE_DONE || ctq->type == AIO_READ_DONE) + { + UNLOCK (&au->io_lock); + } + else if (ctq->type == AIO_CLOSE) + { + NOTE ("Received AIO_CLOSE during error condition"); + UNLOCK (&au->lock); + goto finish_thread; + } + } + + NOTE ("Next ctq, current id: %d", au->id.low); + if (ctq->has_id && au->id.waiting == au->id.low++) + SIGNAL (&au->id.done); + + ctq = ctq->next; + } + au->tail = NULL; + au->head = NULL; + au->empty = 1; + UNLOCK (&au->lock); + SIGNAL (&au->emptysignal); + LOCK (&au->lock); + } + finish_thread: + au->tail = NULL; + au->head = NULL; + au->empty = 1; + SIGNAL (&au->emptysignal); + free (ctq); + return NULL; +} + +/* Free an asynchronous unit. */ + +static void +free_async_unit (async_unit *au) +{ + if (au->tail) + internal_error (NULL, "Trying to free nonempty asynchronous unit"); + + destroy_adv_cond (&au->work); + destroy_adv_cond (&au->emptysignal); + destroy_adv_cond (&au->id.done); + T_ERROR (__gthread_mutex_destroy, &au->lock); + free (au); +} + +/* Initialize an adv_cond structure. */ + +static void +init_adv_cond (struct adv_cond *ac) +{ + ac->pending = 0; + __GTHREAD_MUTEX_INIT_FUNCTION (&ac->lock); + __gthread_cond_init_function (&ac->signal); +} + +/* Initialize an asyncronous unit, returning zero on success, + nonzero on failure. It also sets u->au. */ + +void +init_async_unit (gfc_unit *u) +{ + async_unit *au; + if (!__gthread_active_p ()) + { + u->au = NULL; + return; + } + + au = (async_unit *) xmalloc (sizeof (async_unit)); + u->au = au; + init_adv_cond (&au->work); + init_adv_cond (&au->emptysignal); + __GTHREAD_MUTEX_INIT_FUNCTION (&au->lock); + __GTHREAD_MUTEX_INIT_FUNCTION (&au->io_lock); + LOCK (&au->lock); + T_ERROR (__gthread_create, &au->thread, &async_io, (void *) u); + au->pdt = NULL; + au->head = NULL; + au->tail = NULL; + au->empty = true; + au->id.waiting = -1; + au->id.low = 0; + au->id.high = 0; + au->error.fatal_error = 0; + au->error.has_error = 0; + au->error.last_good_id = 0; + init_adv_cond (&au->id.done); + UNLOCK (&au->lock); +} + +/* Enqueue a transfer statement. */ + +void +enqueue_transfer (async_unit *au, transfer_args *arg, enum aio_do type) +{ + transfer_queue *tq = calloc (sizeof (transfer_queue), 1); + tq->arg = *arg; + tq->type = type; + tq->has_id = 0; + LOCK (&au->lock); + if (!au->tail) + au->head = tq; + else + au->tail->next = tq; + au->tail = tq; + REVOKE_SIGNAL (&(au->emptysignal)); + au->empty = false; + UNLOCK (&au->lock); + SIGNAL (&au->work); +} + +/* Enqueue an st_write_done or st_read_done which contains an ID. */ + +int +enqueue_done_id (async_unit *au, enum aio_do type) +{ + int ret; + transfer_queue *tq = calloc (sizeof (transfer_queue), 1); + + tq->type = type; + tq->has_id = 1; + LOCK (&au->lock); + if (!au->tail) + au->head = tq; + else + au->tail->next = tq; + au->tail = tq; + REVOKE_SIGNAL (&(au->emptysignal)); + au->empty = false; + ret = au->id.high++; + NOTE ("Enqueue id: %d", ret); + UNLOCK (&au->lock); + SIGNAL (&au->work); + return ret; +} + +/* Enqueue an st_write_done or st_read_done without an ID. */ + +void +enqueue_done (async_unit *au, enum aio_do type) +{ + transfer_queue *tq = calloc (sizeof (transfer_queue), 1); + tq->type = type; + tq->has_id = 0; + LOCK (&au->lock); + if (!au->tail) + au->head = tq; + else + au->tail->next = tq; + au->tail = tq; + REVOKE_SIGNAL (&(au->emptysignal)); + au->empty = false; + UNLOCK (&au->lock); + SIGNAL (&au->work); +} + +/* Enqueue a CLOSE statement. */ + +void +enqueue_close (async_unit *au) +{ + transfer_queue *tq = calloc (sizeof (transfer_queue), 1); + + tq->type = AIO_CLOSE; + LOCK (&au->lock); + if (!au->tail) + au->head = tq; + else + au->tail->next = tq; + au->tail = tq; + REVOKE_SIGNAL (&(au->emptysignal)); + au->empty = false; + UNLOCK (&au->lock); + SIGNAL (&au->work); +} + +/* The asynchronous unit keeps the currently active PDT around. + This function changes that to the current one. */ + +void +enqueue_data_transfer_init (async_unit *au, st_parameter_dt *dt, int read_flag) +{ + st_parameter_dt *new = xmalloc (sizeof (st_parameter_dt)); + transfer_queue *tq = xmalloc (sizeof (transfer_queue)); + + memcpy ((void *) new, (void *) dt, sizeof (st_parameter_dt)); + + NOTE ("dt->internal_unit_desc = %p", dt->internal_unit_desc); + NOTE ("common.flags & mask = %d", dt->common.flags & IOPARM_LIBRETURN_MASK); + tq->next = NULL; + tq->type = AIO_DATA_TRANSFER_INIT; + tq->read_flag = read_flag; + tq->has_id = 0; + tq->new_pdt = new; + LOCK (&au->lock); + + if (!au->tail) + au->head = tq; + else + au->tail->next = tq; + au->tail = tq; + REVOKE_SIGNAL (&(au->emptysignal)); + au->empty = 0; + UNLOCK (&au->lock); + SIGNAL (&au->work); +} + +/* Collect the errors that may have happened asynchronously. Return true if + an error has been encountered. */ + +bool +collect_async_errors (st_parameter_common *cmp, async_unit *au) +{ + bool has_error = au->error.has_error; + + if (has_error) + { + if (generate_error_common (cmp, au->error.family, au->error.message)) + { + au->error.has_error = 0; + au->error.cmp = NULL; + } + else + { + /* The program will exit later. */ + au->error.fatal_error = true; + } + } + return has_error; +} + +/* Perform a wait operation on an asynchronous unit with an ID specified, + which means collecting the errors that may have happened asynchronously. + Return true if an error has been encountered. */ + +bool +async_wait_id (st_parameter_common *cmp, async_unit *au, int i) +{ + bool ret; + + if (au == NULL) + return false; + + if (cmp == NULL) + cmp = au->error.cmp; + + if (au->error.has_error) + { + if (i <= au->error.last_good_id) + return false; + + return collect_async_errors (cmp, au); + } + + LOCK (&au->lock); + NOTE ("Waiting for id %d", i); + if (au->id.waiting < i) + au->id.waiting = i; + UNLOCK (&au->lock); + SIGNAL (&(au->work)); + LOCK (&au->lock); + WAIT_SIGNAL_MUTEX (&(au->id.done), + (au->id.low >= au->id.waiting || au->empty), &au->lock); + LOCK (&au->lock); + ret = collect_async_errors (cmp, au); + UNLOCK (&au->lock); + return ret; +} + +/* Perform a wait operation an an asynchronous unit without an ID. */ + +bool +async_wait (st_parameter_common *cmp, async_unit *au) +{ + bool ret; + + if (au == NULL) + return false; + + if (cmp == NULL) + cmp = au->error.cmp; + + SIGNAL (&(au->work)); + LOCK (&(au->lock)); + + if (au->empty) + { + ret = collect_async_errors (cmp, au); + UNLOCK (&au->lock); + return ret; + } + + WAIT_SIGNAL_MUTEX (&(au->emptysignal), (au->empty), &au->lock); + ret = collect_async_errors (cmp, au); + return ret; +} + +/* Close an asynchronous unit. */ + +void +async_close (async_unit *au) +{ + if (au == NULL) + return; + + NOTE ("Closing async unit"); + enqueue_close (au); + T_ERROR (__gthread_join, au->thread, NULL); + free_async_unit (au); +} diff --git a/libgfortran/io/async.h b/libgfortran/io/async.h new file mode 100644 index 00000000000..3581ae65931 --- /dev/null +++ b/libgfortran/io/async.h @@ -0,0 +1,378 @@ +/* Copyright (C) 2018 Free Software Foundation, Inc. + Contributed by Nicolas Koenig + + This file is part of the GNU Fortran runtime library (libgfortran). + + Libgfortran is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3, or (at your option) + any later version. + + Libgfortran is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + Under Section 7 of GPL version 3, you are granted additional + permissions described in the GCC Runtime Library Exception, version + 3.1, as published by the Free Software Foundation. + + You should have received a copy of the GNU General Public License and + a copy of the GCC Runtime Library Exception along with this program; + see the files COPYING3 and COPYING.RUNTIME respectively. If not, see + . */ + +#ifndef ASYNC_H +#define ASYNC_H + +/* Defining DEBUG_ASYNC will enable somewhat verbose debugging + output for async I/O. */ + +#define DEBUG_ASYNC +#undef DEBUG_ASYNC + +#ifdef DEBUG_ASYNC + +/* Define this if you want to use ANSI color escape sequences in your + debugging output. */ + +#define DEBUG_COLOR + +#ifdef DEBUG_COLOR +#define MPREFIX "\033[30;46mM:\033[0m " +#define TPREFIX "\033[37;44mT:\033[0m " +#define RPREFIX "\033[37;41mR:\033[0m " +#define DEBUG_RED "\033[31m" +#define DEBUG_ORANGE "\033[33m" +#define DEBUG_GREEN "\033[32m" +#define DEBUG_DARKRED "\033[31;2m" +#define DEBUG_PURPLE "\033[35m" +#define DEBUG_NORM "\033[0m" +#define DEBUG_REVERSE_RED "\033[41;37m" +#define DEBUG_BLUE "\033[34m" + +#else + +#define MPREFIX "M: " +#define TPREFIX "T: " +#define RPREFIX "" +#define DEBUG_RED "" +#define DEBUG_ORANGE "" +#define DEBUG_GREEN "" +#define DEBUG_DARKRED "" +#define DEBUG_PURPLE "" +#define DEBUG_NORM "" +#define DEBUG_REVERSE_RED "" +#define DEBUG_BLUE "" + +#endif + +#define DEBUG_PRINTF(...) fprintf (stderr,__VA_ARGS__) + +#define IN_DEBUG_QUEUE(mutex) ({ \ + __label__ end; \ + aio_lock_debug *curr = aio_debug_head; \ + while (curr) { \ + if (curr->m == mutex) { \ + goto end; \ + } \ + curr = curr->next; \ + } \ + end:; \ + curr; \ + }) + +#define TAIL_DEBUG_QUEUE ({ \ + aio_lock_debug *curr = aio_debug_head; \ + while (curr && curr->next) { \ + curr = curr->next; \ + } \ + curr; \ + }) + +#define CHECK_LOCK(mutex, status) do { \ + aio_lock_debug *curr; \ + INTERN_LOCK (&debug_queue_lock); \ + if (__gthread_mutex_trylock (mutex)) { \ + if ((curr = IN_DEBUG_QUEUE (mutex))) { \ + sprintf (status, DEBUG_RED "%s():%d" DEBUG_NORM, curr->func, curr->line); \ + } else \ + sprintf (status, DEBUG_RED "unknown" DEBUG_NORM); \ + } \ + else { \ + __gthread_mutex_unlock (mutex); \ + sprintf (status, DEBUG_GREEN "unlocked" DEBUG_NORM); \ + } \ + INTERN_UNLOCK (&debug_queue_lock); \ + }while (0) + +#define T_ERROR(func, ...) do { \ + int t_error_temp; \ + t_error_temp = func(__VA_ARGS__); \ + if (t_error_temp) \ + ERROR (t_error_temp, "args: " #__VA_ARGS__ "\n"); \ + } while (0) + +#define NOTE(str, ...) do{ \ + char note_str[200]; \ + sprintf (note_str, "%s" DEBUG_PURPLE "NOTE: " DEBUG_NORM str, aio_prefix, ##__VA_ARGS__); \ + DEBUG_PRINTF ("%-90s %20s():%-5d\n", note_str, __FUNCTION__, __LINE__); \ + }while (0); + +#define ERROR(errnum, str, ...) do{ \ + char note_str[200]; \ + sprintf (note_str, "%s" DEBUG_REVERSE_RED "ERROR:" DEBUG_NORM " [%d] " str, aio_prefix, \ + errnum, ##__VA_ARGS__); \ + DEBUG_PRINTF ("%-68s %s():%-5d\n", note_str, __FUNCTION__, __LINE__); \ + }while (0) + +#define MUTEX_DEBUG_ADD(mutex) do { \ + aio_lock_debug *n; \ + n = malloc (sizeof(aio_lock_debug)); \ + n->prev = TAIL_DEBUG_QUEUE; \ + if (n->prev) \ + n->prev->next = n; \ + n->next = NULL; \ + n->line = __LINE__; \ + n->func = __FUNCTION__; \ + n->m = mutex; \ + if (!aio_debug_head) { \ + aio_debug_head = n; \ + } \ + } while (0) + +#define UNLOCK(mutex) do { \ + aio_lock_debug *curr; \ + DEBUG_PRINTF ("%s%-75s %20s():%-5d %18p\n", aio_prefix, DEBUG_GREEN "UNLOCK: " DEBUG_NORM #mutex, \ + __FUNCTION__, __LINE__, (void *) mutex); \ + INTERN_LOCK (&debug_queue_lock); \ + curr = IN_DEBUG_QUEUE (mutex); \ + if (curr) \ + { \ + if (curr->prev) \ + curr->prev->next = curr->next; \ + if (curr->next) { \ + curr->next->prev = curr->prev; \ + if (curr == aio_debug_head) \ + aio_debug_head = curr->next; \ + } else { \ + if (curr == aio_debug_head) \ + aio_debug_head = NULL; \ + } \ + free (curr); \ + } \ + INTERN_UNLOCK (&debug_queue_lock); \ + INTERN_UNLOCK (mutex); \ + }while (0) + +#define TRYLOCK(mutex) ({ \ + char status[200]; \ + int res; \ + aio_lock_debug *curr; \ + res = __gthread_mutex_trylock (mutex); \ + INTERN_LOCK (&debug_queue_lock); \ + if (res) { \ + if ((curr = IN_DEBUG_QUEUE (mutex))) { \ + sprintf (status, DEBUG_RED "%s():%d" DEBUG_NORM, curr->func, curr->line); \ + } else \ + sprintf (status, DEBUG_RED "unknown" DEBUG_NORM); \ + } \ + else { \ + sprintf (status, DEBUG_GREEN "unlocked" DEBUG_NORM); \ + MUTEX_DEBUG_ADD (mutex); \ + } \ + DEBUG_PRINTF ("%s%-44s prev: %-35s %20s():%-5d %18p\n", aio_prefix, \ + DEBUG_DARKRED "TRYLOCK: " DEBUG_NORM #mutex, status, __FUNCTION__, __LINE__, \ + (void *) mutex); \ + INTERN_UNLOCK (&debug_queue_lock); \ + res; \ + }) + +#define LOCK(mutex) do { \ + char status[200]; \ + CHECK_LOCK (mutex, status); \ + DEBUG_PRINTF ("%s%-42s prev: %-35s %20s():%-5d %18p\n", aio_prefix, \ + DEBUG_RED "LOCK: " DEBUG_NORM #mutex, status, __FUNCTION__, __LINE__, (void *) mutex); \ + INTERN_LOCK (mutex); \ + INTERN_LOCK (&debug_queue_lock); \ + MUTEX_DEBUG_ADD (mutex); \ + INTERN_UNLOCK (&debug_queue_lock); \ + DEBUG_PRINTF ("%s" DEBUG_RED "ACQ:" DEBUG_NORM " %-30s %78p\n", aio_prefix, #mutex, mutex); \ + } while (0) + +#define DEBUG_LINE(...) __VA_ARGS__ + +#else +#define DEBUG_PRINTF(...) {} +#define CHECK_LOCK(au, mutex, status) {} +#define NOTE(str, ...) {} +#define DEBUG_LINE(...) +#define T_ERROR(func, ...) func(__VA_ARGS__) +#define LOCK(mutex) INTERN_LOCK (mutex) +#define UNLOCK(mutex) INTERN_UNLOCK (mutex) +#define TRYLOCK(mutex) (__gthread_mutex_trylock (mutex)) +#endif + +#define INTERN_LOCK(mutex) T_ERROR (__gthread_mutex_lock, mutex); + +#define INTERN_UNLOCK(mutex) T_ERROR (__gthread_mutex_unlock, mutex); + +#define SIGNAL(advcond) do{ \ + INTERN_LOCK (&(advcond)->lock); \ + (advcond)->pending = 1; \ + DEBUG_PRINTF ("%s%-75s %20s():%-5d %18p\n", aio_prefix, DEBUG_ORANGE "SIGNAL: " DEBUG_NORM \ + #advcond, __FUNCTION__, __LINE__, (void *) advcond); \ + T_ERROR (__gthread_cond_broadcast, &(advcond)->signal); \ + INTERN_UNLOCK (&(advcond)->lock); \ + } while (0) + +#define WAIT_SIGNAL_MUTEX(advcond, condition, mutex) do{ \ + __label__ finish; \ + INTERN_LOCK (&((advcond)->lock)); \ + DEBUG_PRINTF ("%s%-75s %20s():%-5d %18p\n", aio_prefix, DEBUG_BLUE "WAITING: " DEBUG_NORM \ + #advcond, __FUNCTION__, __LINE__, (void *) advcond); \ + if ((advcond)->pending || (condition)){ \ + UNLOCK (mutex); \ + goto finish; \ + } \ + UNLOCK (mutex); \ + while (!__gthread_cond_wait(&(advcond)->signal, &(advcond)->lock)) { \ + { int cond; \ + LOCK (mutex); cond = condition; UNLOCK (mutex); \ + if (cond){ \ + DEBUG_PRINTF ("%s%-75s %20s():%-5d %18p\n", aio_prefix, DEBUG_ORANGE "REC: " DEBUG_NORM \ + #advcond, __FUNCTION__, __LINE__, (void *)advcond); \ + break; \ + } \ + } \ + } \ + finish: \ + (advcond)->pending = 0; \ + INTERN_UNLOCK (&((advcond)->lock)); \ + } while (0) + +#define REVOKE_SIGNAL(advcond) do{ \ + INTERN_LOCK (&(advcond)->lock); \ + (advcond)->pending = 0; \ + INTERN_UNLOCK (&(advcond)->lock); \ + } while (0) + +DEBUG_LINE (extern __thread const char *aio_prefix); + +DEBUG_LINE (typedef struct aio_lock_debug{ + __gthread_mutex_t *m; + int line; + const char *func; + struct aio_lock_debug *next; + struct aio_lock_debug *prev; +} aio_lock_debug;) + +DEBUG_LINE (extern aio_lock_debug *aio_debug_head;) +DEBUG_LINE (extern __gthread_mutex_t debug_queue_lock;) + +/* Thread - local storage of the current unit we are looking at. Needed for + error reporting. */ + +extern __thread gfc_unit *thread_unit; + +enum aio_do { + AIO_INVALID = 0, + AIO_DATA_TRANSFER_INIT, + AIO_TRANSFER_SCALAR, + AIO_TRANSFER_ARRAY, + AIO_WRITE_DONE, + AIO_READ_DONE, + AIO_CLOSE +}; + +typedef union transfer_args +{ + struct + { + void (*transfer) (struct st_parameter_dt *, bt, void *, int, size_t, size_t); + bt arg_bt; + void *data; + int i; + size_t s1; + size_t s2; + } scalar; + struct + { + gfc_array_char *desc; + int kind; + gfc_charlen_type charlen; + } array; +} transfer_args; + +struct adv_cond +{ + int pending; + __gthread_mutex_t lock; + __gthread_cond_t signal; +}; + +typedef struct async_unit +{ + pthread_mutex_t lock; /* Lock for manipulating the queue structure. */ + pthread_mutex_t io_lock; /* Lock for doing actual I/O. */ + struct adv_cond work; + struct adv_cond emptysignal; + struct st_parameter_dt *pdt; + pthread_t thread; + struct transfer_queue *head; + struct transfer_queue *tail; + struct + { + int waiting; + int low; + int high; + struct adv_cond done; + } id; + + bool empty; + + struct { + const char *message; + st_parameter_common *cmp; + bool has_error; + int last_good_id; + int family; + bool fatal_error; + } error; + +} async_unit; + +void init_async_unit (gfc_unit *); +internal_proto (init_async_unit); + +bool async_wait (st_parameter_common *, async_unit *); +internal_proto (async_wait); + +bool async_wait_id (st_parameter_common *, async_unit *, int); +internal_proto (async_wait_id); + +bool collect_async_errors (st_parameter_common *, async_unit *); +internal_proto (collect_async_errors); + +void async_close (async_unit *); +internal_proto (async_close); + +void enqueue_transfer (async_unit * au, transfer_args * arg, enum aio_do); +internal_proto (enqueue_transfer); + +void enqueue_done (async_unit *, enum aio_do type); +internal_proto (enqueue_done); + +int enqueue_done_id (async_unit *, enum aio_do type); +internal_proto (enqueue_done_id); + +void enqueue_init (async_unit *); +internal_proto (enqueue_init); + +void enqueue_data_transfer_init (async_unit *, st_parameter_dt *, int); +internal_proto (enqueue_data_transfer_init); + +void enqueue_close (async_unit *); +internal_proto (enqueue_close); + +#endif diff --git a/libgfortran/io/close.c b/libgfortran/io/close.c index 2117c40ac0d..36d9f94bb93 100644 --- a/libgfortran/io/close.c +++ b/libgfortran/io/close.c @@ -24,6 +24,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see #include "io.h" #include "unix.h" +#include "async.h" #include typedef enum @@ -57,13 +58,21 @@ st_close (st_parameter_close *clp) find_option (&clp->common, clp->status, clp->status_len, status_opt, "Bad STATUS parameter in CLOSE statement"); + u = find_unit (clp->common.unit); + + if (u && u->au) + if (async_wait (&(clp->common), u->au)) + { + library_end (); + return; + } + if ((clp->common.flags & IOPARM_LIBRETURN_MASK) != IOPARM_LIBRETURN_OK) { library_end (); return; } - u = find_unit (clp->common.unit); if (u != NULL) { if (close_share (u) < 0) diff --git a/libgfortran/io/file_pos.c b/libgfortran/io/file_pos.c index 75f58f0f758..362885a37af 100644 --- a/libgfortran/io/file_pos.c +++ b/libgfortran/io/file_pos.c @@ -25,6 +25,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see #include "io.h" #include "fbuf.h" #include "unix.h" +#include "async.h" #include /* file_pos.c-- Implement the file positioning statements, i.e. BACKSPACE, @@ -187,6 +188,7 @@ void st_backspace (st_parameter_filepos *fpp) { gfc_unit *u; + bool needs_unlock = false; library_start (&fpp->common); @@ -214,6 +216,17 @@ st_backspace (st_parameter_filepos *fpp) goto done; } + if (u->au) + { + if (async_wait (&(fpp->common), u->au)) + return; + else + { + needs_unlock = true; + LOCK (&u->au->io_lock); + } + } + /* Make sure format buffer is flushed and reset. */ if (u->flags.form == FORM_FORMATTED) { @@ -267,7 +280,12 @@ st_backspace (st_parameter_filepos *fpp) done: if (u != NULL) - unlock_unit (u); + { + unlock_unit (u); + + if (u->au && needs_unlock) + UNLOCK (&u->au->io_lock); + } library_end (); } @@ -280,6 +298,7 @@ void st_endfile (st_parameter_filepos *fpp) { gfc_unit *u; + bool needs_unlock = false; library_start (&fpp->common); @@ -294,6 +313,17 @@ st_endfile (st_parameter_filepos *fpp) goto done; } + if (u->au) + { + if (async_wait (&(fpp->common), u->au)) + return; + else + { + needs_unlock = true; + LOCK (&u->au->io_lock); + } + } + if (u->flags.access == ACCESS_SEQUENTIAL && u->endfile == AFTER_ENDFILE) { @@ -376,8 +406,11 @@ st_endfile (st_parameter_filepos *fpp) } } - done: - unlock_unit (u); + done: + if (u->au && needs_unlock) + UNLOCK (&u->au->io_lock); + + unlock_unit (u); library_end (); } @@ -390,6 +423,7 @@ void st_rewind (st_parameter_filepos *fpp) { gfc_unit *u; + bool needs_unlock = true; library_start (&fpp->common); @@ -401,6 +435,17 @@ st_rewind (st_parameter_filepos *fpp) "Cannot REWIND a file opened for DIRECT access"); else { + if (u->au) + { + if (async_wait (&(fpp->common), u->au)) + return; + else + { + needs_unlock = true; + LOCK (&u->au->io_lock); + } + } + /* If there are previously written bytes from a write with ADVANCE="no", add a record marker before performing the ENDFILE. */ @@ -436,6 +481,10 @@ st_rewind (st_parameter_filepos *fpp) } /* Update position for INQUIRE. */ u->flags.position = POSITION_REWIND; + + if (u->au && needs_unlock) + UNLOCK (&u->au->io_lock); + unlock_unit (u); } @@ -450,12 +499,24 @@ void st_flush (st_parameter_filepos *fpp) { gfc_unit *u; + bool needs_unlock = false; library_start (&fpp->common); u = find_unit (fpp->common.unit); if (u != NULL) { + if (u->au) + { + if (async_wait (&(fpp->common), u->au)) + return; + else + { + needs_unlock = true; + LOCK (&u->au->io_lock); + } + } + /* Make sure format buffer is flushed. */ if (u->flags.form == FORM_FORMATTED) fbuf_flush (u, u->mode); @@ -469,5 +530,8 @@ st_flush (st_parameter_filepos *fpp) generate_error (&fpp->common, LIBERROR_BAD_OPTION, "Specified UNIT in FLUSH is not connected"); + if (needs_unlock) + UNLOCK (&u->au->io_lock); + library_end (); } diff --git a/libgfortran/io/inquire.c b/libgfortran/io/inquire.c index 047be39ec7a..4b6a6f5c1d3 100644 --- a/libgfortran/io/inquire.c +++ b/libgfortran/io/inquire.c @@ -26,6 +26,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see /* Implement the non-IOLENGTH variant of the INQUIRY statement */ #include "io.h" +#include "async.h" #include "unix.h" #include @@ -281,12 +282,6 @@ inquire_via_unit (st_parameter_inquire *iqp, gfc_unit *u) { GFC_INTEGER_4 cf2 = iqp->flags2; - if ((cf2 & IOPARM_INQUIRE_HAS_PENDING) != 0) - *iqp->pending = 0; - - if ((cf2 & IOPARM_INQUIRE_HAS_ID) != 0) - *iqp->id = 0; - if ((cf2 & IOPARM_INQUIRE_HAS_ENCODING) != 0) { if (u == NULL || u->flags.form != FORM_FORMATTED) @@ -332,21 +327,43 @@ inquire_via_unit (st_parameter_inquire *iqp, gfc_unit *u) if (u == NULL) p = undefined; else - switch (u->flags.async) { - case ASYNC_YES: - p = yes; - break; - case ASYNC_NO: - p = no; - break; - default: - internal_error (&iqp->common, "inquire_via_unit(): Bad async"); + switch (u->flags.async) + { + case ASYNC_YES: + p = yes; + break; + case ASYNC_NO: + p = no; + break; + default: + internal_error (&iqp->common, "inquire_via_unit(): Bad async"); + } } - cf_strcpy (iqp->asynchronous, iqp->asynchronous_len, p); } + if ((cf2 & IOPARM_INQUIRE_HAS_PENDING) != 0) + { + if (u->au == NULL) + *(iqp->pending) = 0; + else + { + LOCK (&(u->au->lock)); + if ((cf2 & IOPARM_INQUIRE_HAS_ID) != 0) + { + int id; + id = *(iqp->id); + *(iqp->pending) = id > u->au->id.low; + } + else + { + *(iqp->pending) = ! u->au->empty; + } + UNLOCK (&(u->au->lock)); + } + } + if ((cf2 & IOPARM_INQUIRE_HAS_SIGN) != 0) { if (u == NULL) diff --git a/libgfortran/io/io.h b/libgfortran/io/io.h index ccbaf47ff90..d31213106ed 100644 --- a/libgfortran/io/io.h +++ b/libgfortran/io/io.h @@ -531,7 +531,9 @@ typedef struct st_parameter_dt /* A flag used to identify when a non-standard expanded namelist read has occurred. */ unsigned expanded_read : 1; - /* 13 unused bits. */ + /* Flag to indicate if the statement has async="YES". */ + unsigned async : 1; + /* 12 unused bits. */ int child_saved_iostat; int nml_delim; @@ -590,7 +592,7 @@ extern char check_st_parameter_dt[sizeof (((st_parameter_dt *) 0)->u.pad) typedef struct { st_parameter_common common; - CHARACTER1 (id); + GFC_INTEGER_4 *id; } st_parameter_wait; @@ -659,6 +661,9 @@ typedef struct gfc_unit int continued; + /* Contains the pointer to the async unit. */ + struct async_unit *au; + __gthread_mutex_t lock; /* Number of threads waiting to acquire this unit's lock. When non-zero, close_unit doesn't only removes the unit @@ -815,11 +820,18 @@ extern void next_record (st_parameter_dt *, int); internal_proto(next_record); extern void st_wait (st_parameter_wait *); -export_proto(st_wait); +export_proto (st_wait); + +extern void st_wait_async (st_parameter_wait *); +export_proto (st_wait_async); extern void hit_eof (st_parameter_dt *); internal_proto(hit_eof); +extern void transfer_array_inner (st_parameter_dt *, gfc_array_char *, int, + gfc_charlen_type); +internal_proto (transfer_array_inner); + /* read.c */ extern void set_integer (void *, GFC_INTEGER_LARGEST, int); @@ -988,3 +1000,14 @@ memset4 (gfc_char4_t *p, gfc_char4_t c, int k) #endif +extern void +st_write_done_worker (st_parameter_dt *); +internal_proto (st_write_done_worker); + +extern void +st_read_done_worker (st_parameter_dt *); +internal_proto (st_read_done_worker); + +extern void +data_transfer_init_worker (st_parameter_dt *, int); +internal_proto (data_transfer_init_worker); diff --git a/libgfortran/io/open.c b/libgfortran/io/open.c index 05aac8f6a8b..266033815fd 100644 --- a/libgfortran/io/open.c +++ b/libgfortran/io/open.c @@ -26,6 +26,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see #include "io.h" #include "fbuf.h" #include "unix.h" +#include "async.h" #ifdef HAVE_UNISTD_H #include @@ -651,8 +652,12 @@ new_unit (st_parameter_open *opp, gfc_unit *u, unit_flags *flags) else u->fbuf = NULL; - - + /* Check if asynchrounous. */ + if (flags->async == ASYNC_YES) + init_async_unit (u); + else + u->au = NULL; + return u; cleanup: diff --git a/libgfortran/io/read.c b/libgfortran/io/read.c index 976020af448..f972858c146 100644 --- a/libgfortran/io/read.c +++ b/libgfortran/io/read.c @@ -30,6 +30,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see #include #include #include +#include "async.h" typedef unsigned char uchar; @@ -42,6 +43,7 @@ typedef unsigned char uchar; void set_integer (void *dest, GFC_INTEGER_LARGEST value, int length) { + NOTE ("set_integer: %lld %p", (long long int) value, dest); switch (length) { #ifdef HAVE_GFC_INTEGER_16 diff --git a/libgfortran/io/transfer.c b/libgfortran/io/transfer.c index df33bed1561..fa66e0f362d 100644 --- a/libgfortran/io/transfer.c +++ b/libgfortran/io/transfer.c @@ -31,6 +31,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see #include "fbuf.h" #include "format.h" #include "unix.h" +#include "async.h" #include #include @@ -184,6 +185,12 @@ static const st_option pad_opt[] = { {NULL, 0} }; +static const st_option async_opt[] = { + {"yes", ASYNC_YES}, + {"no", ASYNC_NO}, + {NULL, 0} +}; + typedef enum { FORMATTED_SEQUENTIAL, UNFORMATTED_SEQUENTIAL, FORMATTED_DIRECT, UNFORMATTED_DIRECT, FORMATTED_STREAM, UNFORMATTED_STREAM @@ -1594,7 +1601,8 @@ formatted_transfer_scalar_read (st_parameter_dt *dtp, bt type, void *p, int kind read_f (dtp, f, p, kind); break; default: - internal_error (&dtp->common, "formatted_transfer(): Bad type"); + internal_error (&dtp->common, + "formatted_transfer (): Bad type"); } break; @@ -2066,7 +2074,7 @@ formatted_transfer_scalar_write (st_parameter_dt *dtp, bt type, void *p, int kin break; default: internal_error (&dtp->common, - "formatted_transfer(): Bad type"); + "formatted_transfer (): Bad type"); } break; @@ -2281,6 +2289,38 @@ formatted_transfer (st_parameter_dt *dtp, bt type, void *p, int kind, } } +/* Wrapper function for I/O of scalar types. If this should be an async I/O + request, queue it. For a synchronous write on an async unit, perform the + wait operation and return an error. For all synchronous writes, call the + right transfer function. */ + +static void +wrap_scalar_transfer (st_parameter_dt *dtp, bt type, void *p, int kind, + size_t size, size_t n_elem) +{ + if (dtp->u.p.current_unit && dtp->u.p.current_unit->au) + { + if (dtp->u.p.async) + { + transfer_args args; + args.scalar.transfer = dtp->u.p.transfer; + args.scalar.arg_bt = type; + args.scalar.data = p; + args.scalar.i = kind; + args.scalar.s1 = size; + args.scalar.s2 = n_elem; + enqueue_transfer (dtp->u.p.current_unit->au, &args, + AIO_TRANSFER_SCALAR); + return; + } + } + /* Come here if there was no asynchronous I/O to be scheduled. */ + if ((dtp->common.flags & IOPARM_LIBRETURN_MASK) != IOPARM_LIBRETURN_OK) + return; + + dtp->u.p.transfer (dtp, type, p, kind, size, 1); +} + /* Data transfer entry points. The type of the data entity is implicit in the subroutine call. This prevents us from having to @@ -2289,9 +2329,7 @@ formatted_transfer (st_parameter_dt *dtp, bt type, void *p, int kind, void transfer_integer (st_parameter_dt *dtp, void *p, int kind) { - if ((dtp->common.flags & IOPARM_LIBRETURN_MASK) != IOPARM_LIBRETURN_OK) - return; - dtp->u.p.transfer (dtp, BT_INTEGER, p, kind, kind, 1); + wrap_scalar_transfer (dtp, BT_INTEGER, p, kind, kind, 1); } void @@ -2307,7 +2345,7 @@ transfer_real (st_parameter_dt *dtp, void *p, int kind) if ((dtp->common.flags & IOPARM_LIBRETURN_MASK) != IOPARM_LIBRETURN_OK) return; size = size_from_real_kind (kind); - dtp->u.p.transfer (dtp, BT_REAL, p, kind, size, 1); + wrap_scalar_transfer (dtp, BT_REAL, p, kind, size, 1); } void @@ -2319,9 +2357,7 @@ transfer_real_write (st_parameter_dt *dtp, void *p, int kind) void transfer_logical (st_parameter_dt *dtp, void *p, int kind) { - if ((dtp->common.flags & IOPARM_LIBRETURN_MASK) != IOPARM_LIBRETURN_OK) - return; - dtp->u.p.transfer (dtp, BT_LOGICAL, p, kind, kind, 1); + wrap_scalar_transfer (dtp, BT_LOGICAL, p, kind, kind, 1); } void @@ -2345,7 +2381,7 @@ transfer_character (st_parameter_dt *dtp, void *p, gfc_charlen_type len) p = empty_string; /* Set kind here to 1. */ - dtp->u.p.transfer (dtp, BT_CHARACTER, p, 1, len, 1); + wrap_scalar_transfer (dtp, BT_CHARACTER, p, 1, len, 1); } void @@ -2369,7 +2405,7 @@ transfer_character_wide (st_parameter_dt *dtp, void *p, gfc_charlen_type len, in p = empty_string; /* Here we pass the actual kind value. */ - dtp->u.p.transfer (dtp, BT_CHARACTER, p, kind, len, 1); + wrap_scalar_transfer (dtp, BT_CHARACTER, p, kind, len, 1); } void @@ -2385,7 +2421,7 @@ transfer_complex (st_parameter_dt *dtp, void *p, int kind) if ((dtp->common.flags & IOPARM_LIBRETURN_MASK) != IOPARM_LIBRETURN_OK) return; size = size_from_complex_kind (kind); - dtp->u.p.transfer (dtp, BT_COMPLEX, p, kind, size, 1); + wrap_scalar_transfer (dtp, BT_COMPLEX, p, kind, size, 1); } void @@ -2395,8 +2431,8 @@ transfer_complex_write (st_parameter_dt *dtp, void *p, int kind) } void -transfer_array (st_parameter_dt *dtp, gfc_array_char *desc, int kind, - gfc_charlen_type charlen) +transfer_array_inner (st_parameter_dt *dtp, gfc_array_char *desc, int kind, + gfc_charlen_type charlen) { index_type count[GFC_MAX_DIMENSIONS]; index_type extent[GFC_MAX_DIMENSIONS]; @@ -2407,7 +2443,7 @@ transfer_array (st_parameter_dt *dtp, gfc_array_char *desc, int kind, bt iotype; /* Adjust item_count before emitting error message. */ - + if ((dtp->common.flags & IOPARM_LIBRETURN_MASK) != IOPARM_LIBRETURN_OK) return; @@ -2470,6 +2506,36 @@ transfer_array (st_parameter_dt *dtp, gfc_array_char *desc, int kind, } } +void +transfer_array (st_parameter_dt *dtp, gfc_array_char *desc, int kind, + gfc_charlen_type charlen) +{ + if ((dtp->common.flags & IOPARM_LIBRETURN_MASK) != IOPARM_LIBRETURN_OK) + return; + + if (dtp->u.p.current_unit && dtp->u.p.current_unit->au) + { + if (dtp->u.p.async) + { + transfer_args args; + size_t sz = sizeof (gfc_array_char) + + sizeof (descriptor_dimension) + * GFC_DESCRIPTOR_RANK (desc); + args.array.desc = xmalloc (sz); + NOTE ("desc = %p", (void *) args.array.desc); + memcpy (args.array.desc, desc, sz); + args.array.kind = kind; + args.array.charlen = charlen; + enqueue_transfer (dtp->u.p.current_unit->au, &args, + AIO_TRANSFER_ARRAY); + return; + } + } + /* Come here if there was no asynchronous I/O to be scheduled. */ + transfer_array_inner (dtp, desc, kind, charlen); +} + + void transfer_array_write (st_parameter_dt *dtp, gfc_array_char *desc, int kind, gfc_charlen_type charlen) @@ -2492,7 +2558,7 @@ transfer_derived (st_parameter_dt *parent, void *dtio_source, void *dtio_proc) else parent->u.p.fdtio_ptr = (formatted_dtio) dtio_proc; } - parent->u.p.transfer (parent, BT_CLASS, dtio_source, 0, 0, 1); + wrap_scalar_transfer (parent, BT_CLASS, dtio_source, 0, 0, 1); } @@ -2667,6 +2733,9 @@ data_transfer_init (st_parameter_dt *dtp, int read_flag) unit_flags u_flags; /* Used for creating a unit if needed. */ GFC_INTEGER_4 cf = dtp->common.flags; namelist_info *ionml; + async_unit *au; + + NOTE ("data_transfer_init"); ionml = ((cf & IOPARM_DT_IONML_SET) != 0) ? dtp->u.p.ionml : NULL; @@ -2693,9 +2762,9 @@ data_transfer_init (st_parameter_dt *dtp, int read_flag) } else if (dtp->u.p.current_unit->s == NULL) { /* Open the unit with some default flags. */ - st_parameter_open opp; - unit_convert conv; - + st_parameter_open opp; + unit_convert conv; + NOTE ("Open the unit with some default flags."); memset (&u_flags, '\0', sizeof (u_flags)); u_flags.access = ACCESS_SEQUENTIAL; u_flags.action = ACTION_READWRITE; @@ -2770,6 +2839,42 @@ data_transfer_init (st_parameter_dt *dtp, int read_flag) else if (dtp->u.p.current_unit->internal_unit_kind > 0) dtp->u.p.unit_is_internal = 1; + if ((cf & IOPARM_DT_HAS_ASYNCHRONOUS) != 0) + { + int f; + f = find_option (&dtp->common, dtp->asynchronous, dtp->asynchronous_len, + async_opt, "Bad ASYNCHRONOUS in data transfer " + "statement"); + if (f == ASYNC_YES && dtp->u.p.current_unit->flags.async != ASYNC_YES) + { + generate_error (&dtp->common, LIBERROR_OPTION_CONFLICT, + "ASYNCHRONOUS transfer without " + "ASYHCRONOUS='YES' in OPEN"); + return; + } + dtp->u.p.async = f == ASYNC_YES; + } + + au = dtp->u.p.current_unit->au; + if (au) + { + if (dtp->u.p.async) + { + /* If this is an asynchronous I/O statement, collect errors and + return if there are any. */ + if (collect_async_errors (&dtp->common, au)) + return; + } + else + { + /* Synchronous statement: Perform a wait operation for any pending + asynchronous I/O. This needs to be done before all other error + checks. See F2008, 9.6.4.1. */ + if (async_wait (&(dtp->common), au)) + return; + } + } + /* Check the action. */ if (read_flag && dtp->u.p.current_unit->flags.action == ACTION_WRITE) @@ -3009,6 +3114,57 @@ data_transfer_init (st_parameter_dt *dtp, int read_flag) if (dtp->u.p.current_unit->pad_status == PAD_UNSPECIFIED) dtp->u.p.current_unit->pad_status = dtp->u.p.current_unit->flags.pad; + /* Set up the subroutine that will handle the transfers. */ + + if (read_flag) + { + if (dtp->u.p.current_unit->flags.form == FORM_UNFORMATTED) + dtp->u.p.transfer = unformatted_read; + else + { + if ((cf & IOPARM_DT_LIST_FORMAT) != 0) + dtp->u.p.transfer = list_formatted_read; + else + dtp->u.p.transfer = formatted_transfer; + } + } + else + { + if (dtp->u.p.current_unit->flags.form == FORM_UNFORMATTED) + dtp->u.p.transfer = unformatted_write; + else + { + if ((cf & IOPARM_DT_LIST_FORMAT) != 0) + dtp->u.p.transfer = list_formatted_write; + else + dtp->u.p.transfer = formatted_transfer; + } + } + + if (au) + { + NOTE ("enqueue_data_transfer"); + enqueue_data_transfer_init (au, dtp, read_flag); + } + else + { + NOTE ("invoking data_transfer_init_worker"); + data_transfer_init_worker (dtp, read_flag); + } +} + +void +data_transfer_init_worker (st_parameter_dt *dtp, int read_flag) +{ + GFC_INTEGER_4 cf = dtp->common.flags; + + NOTE ("starting worker..."); + + if (read_flag && dtp->u.p.current_unit->flags.form != FORM_UNFORMATTED + && ((cf & IOPARM_DT_LIST_FORMAT) != 0) + && dtp->u.p.current_unit->child_dtio == 0) + dtp->u.p.current_unit->last_char = EOF - 1; + /* Check to see if we might be reading what we wrote before */ if (dtp->u.p.mode != dtp->u.p.current_unit->mode @@ -3135,38 +3291,6 @@ data_transfer_init (st_parameter_dt *dtp, int read_flag) pre_position (dtp); - - /* Set up the subroutine that will handle the transfers. */ - - if (read_flag) - { - if (dtp->u.p.current_unit->flags.form == FORM_UNFORMATTED) - dtp->u.p.transfer = unformatted_read; - else - { - if ((cf & IOPARM_DT_LIST_FORMAT) != 0) - { - if (dtp->u.p.current_unit->child_dtio == 0) - dtp->u.p.current_unit->last_char = EOF - 1; - dtp->u.p.transfer = list_formatted_read; - } - else - dtp->u.p.transfer = formatted_transfer; - } - } - else - { - if (dtp->u.p.current_unit->flags.form == FORM_UNFORMATTED) - dtp->u.p.transfer = unformatted_write; - else - { - if ((cf & IOPARM_DT_LIST_FORMAT) != 0) - dtp->u.p.transfer = list_formatted_write; - else - dtp->u.p.transfer = formatted_transfer; - } - } - /* Make sure that we don't do a read after a nonadvancing write. */ if (read_flag) @@ -4099,7 +4223,7 @@ extern void st_read_done (st_parameter_dt *); export_proto(st_read_done); void -st_read_done (st_parameter_dt *dtp) +st_read_done_worker (st_parameter_dt *dtp) { finalize_transfer (dtp); @@ -4127,6 +4251,30 @@ st_read_done (st_parameter_dt *dtp) free_format_data (dtp->u.p.fmt); free_format (dtp); } + } +} + +void +st_read_done (st_parameter_dt *dtp) +{ + if (dtp->u.p.current_unit) + { + if (dtp->u.p.current_unit->au) + { + if (dtp->common.flags & IOPARM_DT_HAS_ID) + *dtp->id = enqueue_done_id (dtp->u.p.current_unit->au, AIO_READ_DONE); + else + { + enqueue_done (dtp->u.p.current_unit->au, AIO_READ_DONE); + /* An asynchronous unit without ASYNCHRONOUS="YES" - make this + synchronous by performing a wait operation. */ + if (!dtp->u.p.async) + async_wait (&dtp->common, dtp->u.p.current_unit->au); + } + } + else + st_read_done_worker (dtp); + unlock_unit (dtp->u.p.current_unit); } @@ -4134,7 +4282,7 @@ st_read_done (st_parameter_dt *dtp) } extern void st_write (st_parameter_dt *); -export_proto(st_write); +export_proto (st_write); void st_write (st_parameter_dt *dtp) @@ -4143,11 +4291,9 @@ st_write (st_parameter_dt *dtp) data_transfer_init (dtp, 0); } -extern void st_write_done (st_parameter_dt *); -export_proto(st_write_done); void -st_write_done (st_parameter_dt *dtp) +st_write_done_worker (st_parameter_dt *dtp) { finalize_transfer (dtp); @@ -4196,16 +4342,65 @@ st_write_done (st_parameter_dt *dtp) free_format_data (dtp->u.p.fmt); free_format (dtp); } + } +} + +extern void st_write_done (st_parameter_dt *); +export_proto(st_write_done); + +void +st_write_done (st_parameter_dt *dtp) +{ + if (dtp->u.p.current_unit) + { + if (dtp->u.p.current_unit->au) + { + if (dtp->common.flags & IOPARM_DT_HAS_ID) + *dtp->id = enqueue_done_id (dtp->u.p.current_unit->au, + AIO_WRITE_DONE); + else + { + enqueue_done (dtp->u.p.current_unit->au, AIO_WRITE_DONE); + /* An asynchronous unit without ASYNCHRONOUS="YES" - make this + synchronous by performing a wait operation. */ + if (!dtp->u.p.async) + async_wait (&dtp->common, dtp->u.p.current_unit->au); + } + } + else + st_write_done_worker (dtp); + unlock_unit (dtp->u.p.current_unit); } + library_end (); } +/* Wait operation. We need to keep around the do-nothing version + of st_wait for compatibility with previous versions, which had marked + the argument as unused (and thus liable to be removed). + + TODO: remove at next bump in version number. */ -/* F2003: This is a stub for the runtime portion of the WAIT statement. */ void st_wait (st_parameter_wait *wtp __attribute__((unused))) { + return; +} + +void +st_wait_async (st_parameter_wait *wtp) +{ + gfc_unit *u = find_unit (wtp->common.unit); + if (u->au) + { + if (wtp->common.flags & IOPARM_WAIT_HAS_ID) + async_wait_id (&(wtp->common), u->au, *wtp->id); + else + async_wait (&(wtp->common), u->au); + } + + unlock_unit (u); } diff --git a/libgfortran/io/unit.c b/libgfortran/io/unit.c index 559dba92635..0d0ca8f6055 100644 --- a/libgfortran/io/unit.c +++ b/libgfortran/io/unit.c @@ -27,6 +27,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see #include "fbuf.h" #include "format.h" #include "unix.h" +#include "async.h" #include #include @@ -240,7 +241,7 @@ insert_unit (int n) #else __GTHREAD_MUTEX_INIT_FUNCTION (&u->lock); #endif - __gthread_mutex_lock (&u->lock); + LOCK (&u->lock); u->priority = pseudo_random (); unit_root = insert (u, unit_root); return u; @@ -327,7 +328,9 @@ get_gfc_unit (int n, int do_create) gfc_unit *p; int c, created = 0; - __gthread_mutex_lock (&unit_lock); + NOTE ("Unit n=%d, do_create = %d", n, do_create); + LOCK (&unit_lock); + retry: for (c = 0; c < CACHE_SIZE; c++) if (unit_cache[c] != NULL && unit_cache[c]->unit_number == n) @@ -366,7 +369,7 @@ retry: { /* Newly created units have their lock held already from insert_unit. Just unlock UNIT_LOCK and return. */ - __gthread_mutex_unlock (&unit_lock); + UNLOCK (&unit_lock); return p; } @@ -374,10 +377,10 @@ found: if (p != NULL && (p->child_dtio == 0)) { /* Fast path. */ - if (! __gthread_mutex_trylock (&p->lock)) + if (! TRYLOCK (&p->lock)) { /* assert (p->closed == 0); */ - __gthread_mutex_unlock (&unit_lock); + UNLOCK (&unit_lock); return p; } @@ -385,15 +388,15 @@ found: } - __gthread_mutex_unlock (&unit_lock); + UNLOCK (&unit_lock); if (p != NULL && (p->child_dtio == 0)) { - __gthread_mutex_lock (&p->lock); + LOCK (&p->lock); if (p->closed) { - __gthread_mutex_lock (&unit_lock); - __gthread_mutex_unlock (&p->lock); + LOCK (&unit_lock); + UNLOCK (&p->lock); if (predec_waiting_locked (p) == 0) destroy_unit_mutex (p); goto retry; @@ -640,7 +643,7 @@ init_units (void) fbuf_init (u, 0); - __gthread_mutex_unlock (&u->lock); + UNLOCK (&u->lock); } if (options.stdout_unit >= 0) @@ -671,7 +674,7 @@ init_units (void) fbuf_init (u, 0); - __gthread_mutex_unlock (&u->lock); + UNLOCK (&u->lock); } if (options.stderr_unit >= 0) @@ -702,13 +705,13 @@ init_units (void) fbuf_init (u, 256); /* 256 bytes should be enough, probably not doing any kind of exotic formatting to stderr. */ - __gthread_mutex_unlock (&u->lock); + UNLOCK (&u->lock); } /* The default internal units. */ u = insert_unit (GFC_INTERNAL_UNIT); - __gthread_mutex_unlock (&u->lock); + UNLOCK (&u->lock); u = insert_unit (GFC_INTERNAL_UNIT4); - __gthread_mutex_unlock (&u->lock); + UNLOCK (&u->lock); } @@ -717,6 +720,9 @@ close_unit_1 (gfc_unit *u, int locked) { int i, rc; + if (u->au) + async_close (u->au); + /* If there are previously written bytes from a write with ADVANCE="no" Reposition the buffer before closing. */ if (u->previous_nonadvancing_write) @@ -726,7 +732,7 @@ close_unit_1 (gfc_unit *u, int locked) u->closed = 1; if (!locked) - __gthread_mutex_lock (&unit_lock); + LOCK (&unit_lock); for (i = 0; i < CACHE_SIZE; i++) if (unit_cache[i] == u) @@ -744,7 +750,7 @@ close_unit_1 (gfc_unit *u, int locked) newunit_free (u->unit_number); if (!locked) - __gthread_mutex_unlock (&u->lock); + UNLOCK (&u->lock); /* If there are any threads waiting in find_unit for this unit, avoid freeing the memory, the last such thread will free it @@ -753,7 +759,7 @@ close_unit_1 (gfc_unit *u, int locked) destroy_unit_mutex (u); if (!locked) - __gthread_mutex_unlock (&unit_lock); + UNLOCK (&unit_lock); return rc; } @@ -761,7 +767,9 @@ close_unit_1 (gfc_unit *u, int locked) void unlock_unit (gfc_unit *u) { - __gthread_mutex_unlock (&u->lock); + NOTE ("unlock_unit = %d", u->unit_number); + UNLOCK (&u->lock); + NOTE ("unlock_unit done"); } /* close_unit()-- Close a unit. The stream is closed, and any memory @@ -785,10 +793,10 @@ close_unit (gfc_unit *u) void close_units (void) { - __gthread_mutex_lock (&unit_lock); + LOCK (&unit_lock); while (unit_root != NULL) close_unit_1 (unit_root, 1); - __gthread_mutex_unlock (&unit_lock); + UNLOCK (&unit_lock); free (newunits); @@ -895,7 +903,7 @@ finish_last_advance_record (gfc_unit *u) int newunit_alloc (void) { - __gthread_mutex_lock (&unit_lock); + LOCK (&unit_lock); if (!newunits) { newunits = xcalloc (16, 1); @@ -909,7 +917,7 @@ newunit_alloc (void) { newunits[ii] = true; newunit_lwi = ii + 1; - __gthread_mutex_unlock (&unit_lock); + UNLOCK (&unit_lock); return -ii + NEWUNIT_START; } } @@ -922,7 +930,7 @@ newunit_alloc (void) memset (newunits + old_size, 0, old_size); newunits[old_size] = true; newunit_lwi = old_size + 1; - __gthread_mutex_unlock (&unit_lock); + UNLOCK (&unit_lock); return -old_size + NEWUNIT_START; } diff --git a/libgfortran/io/unix.c b/libgfortran/io/unix.c index a8fd07a5f3b..4a133fd44bd 100644 --- a/libgfortran/io/unix.c +++ b/libgfortran/io/unix.c @@ -27,6 +27,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see #include "io.h" #include "unix.h" +#include "async.h" #include #ifdef HAVE_UNISTD_H @@ -1742,7 +1743,7 @@ find_file (const char *file, gfc_charlen_type file_len) id = id_from_path (path); #endif - __gthread_mutex_lock (&unit_lock); + LOCK (&unit_lock); retry: u = find_file0 (unit_root, FIND_FILE0_ARGS); if (u != NULL) @@ -1751,20 +1752,20 @@ retry: if (! __gthread_mutex_trylock (&u->lock)) { /* assert (u->closed == 0); */ - __gthread_mutex_unlock (&unit_lock); + UNLOCK (&unit_lock); goto done; } inc_waiting_locked (u); } - __gthread_mutex_unlock (&unit_lock); + UNLOCK (&unit_lock); if (u != NULL) { - __gthread_mutex_lock (&u->lock); + LOCK (&u->lock); if (u->closed) { - __gthread_mutex_lock (&unit_lock); - __gthread_mutex_unlock (&u->lock); + LOCK (&unit_lock); + UNLOCK (&u->lock); if (predec_waiting_locked (u) == 0) free (u); goto retry; @@ -1794,7 +1795,7 @@ flush_all_units_1 (gfc_unit *u, int min_unit) return u; if (u->s) sflush (u->s); - __gthread_mutex_unlock (&u->lock); + UNLOCK (&u->lock); } u = u->right; } @@ -1807,31 +1808,31 @@ flush_all_units (void) gfc_unit *u; int min_unit = 0; - __gthread_mutex_lock (&unit_lock); + LOCK (&unit_lock); do { u = flush_all_units_1 (unit_root, min_unit); if (u != NULL) inc_waiting_locked (u); - __gthread_mutex_unlock (&unit_lock); + UNLOCK (&unit_lock); if (u == NULL) return; - __gthread_mutex_lock (&u->lock); + LOCK (&u->lock); min_unit = u->unit_number + 1; if (u->closed == 0) { sflush (u->s); - __gthread_mutex_lock (&unit_lock); - __gthread_mutex_unlock (&u->lock); + LOCK (&unit_lock); + UNLOCK (&u->lock); (void) predec_waiting_locked (u); } else { - __gthread_mutex_lock (&unit_lock); - __gthread_mutex_unlock (&u->lock); + LOCK (&unit_lock); + UNLOCK (&u->lock); if (predec_waiting_locked (u) == 0) free (u); } diff --git a/libgfortran/libgfortran.h b/libgfortran/libgfortran.h index 2b75fbf904d..b5a742aac88 100644 --- a/libgfortran/libgfortran.h +++ b/libgfortran/libgfortran.h @@ -738,6 +738,9 @@ internal_proto(translate_error); extern void generate_error (st_parameter_common *, int, const char *); iexport_proto(generate_error); +extern bool generate_error_common (st_parameter_common *, int, const char *); +iexport_proto(generate_error_common); + extern void generate_warning (st_parameter_common *, const char *); internal_proto(generate_warning); @@ -1743,5 +1746,7 @@ void cshift1_16_c16 (gfc_array_c16 * const restrict, internal_proto(cshift1_16_c16); #endif +/* Define this if we support asynchronous I/O on this platform. This + currently requires weak symbols. */ #endif /* LIBGFOR_H */ diff --git a/libgfortran/runtime/error.c b/libgfortran/runtime/error.c index 1a53e2f72f1..811d86b0737 100644 --- a/libgfortran/runtime/error.c +++ b/libgfortran/runtime/error.c @@ -24,6 +24,9 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see #include "libgfortran.h" +#include "io.h" +#include "async.h" + #include #include #include @@ -526,24 +529,38 @@ translate_error (int code) } -/* generate_error()-- Come here when an error happens. This - * subroutine is called if it is possible to continue on after the error. - * If an IOSTAT or IOMSG variable exists, we set it. If IOSTAT or - * ERR labels are present, we return, otherwise we terminate the program - * after printing a message. The error code is always required but the - * message parameter can be NULL, in which case a string describing - * the most recent operating system error is used. */ +/* Worker function for generate_error and generate_error_async. Return true + if a straight return is to be done, zero if the program should abort. */ -void -generate_error (st_parameter_common *cmp, int family, const char *message) +bool +generate_error_common (st_parameter_common *cmp, int family, const char *message) { char errmsg[STRERR_MAXSZ]; + gfc_unit *u; + + NOTE ("Entering generate_error_common"); + + u = thread_unit; + if (u && u->au) + { + if (u->au->error.has_error) + return true; + + if (__gthread_equal (u->au->thread, __gthread_self ())) + { + u->au->error.has_error = 1; + u->au->error.cmp = cmp; + u->au->error.family = family; + u->au->error.message = message; + return true; + } + } /* If there was a previous error, don't mask it with another error message, EOF or EOR condition. */ if ((cmp->flags & IOPARM_LIBRETURN_MASK) == IOPARM_LIBRETURN_ERROR) - return; + return true; /* Set the error status. */ if ((cmp->flags & IOPARM_HAS_IOSTAT)) @@ -562,36 +579,56 @@ generate_error (st_parameter_common *cmp, int family, const char *message) switch (family) { case LIBERROR_EOR: - cmp->flags |= IOPARM_LIBRETURN_EOR; + cmp->flags |= IOPARM_LIBRETURN_EOR; NOTE("EOR"); if ((cmp->flags & IOPARM_EOR)) - return; + return true; break; case LIBERROR_END: - cmp->flags |= IOPARM_LIBRETURN_END; + cmp->flags |= IOPARM_LIBRETURN_END; NOTE("END"); if ((cmp->flags & IOPARM_END)) - return; + return true; break; default: - cmp->flags |= IOPARM_LIBRETURN_ERROR; + cmp->flags |= IOPARM_LIBRETURN_ERROR; NOTE("ERROR"); if ((cmp->flags & IOPARM_ERR)) - return; + return true; break; } /* Return if the user supplied an iostat variable. */ if ((cmp->flags & IOPARM_HAS_IOSTAT)) - return; + return true; - /* Terminate the program */ + /* Return code, caller is responsible for terminating + the program if necessary. */ recursion_check (); show_locus (cmp); estr_write ("Fortran runtime error: "); estr_write (message); estr_write ("\n"); - exit_error (2); + return false; +} + +/* generate_error()-- Come here when an error happens. This + * subroutine is called if it is possible to continue on after the error. + * If an IOSTAT or IOMSG variable exists, we set it. If IOSTAT or + * ERR labels are present, we return, otherwise we terminate the program + * after printing a message. The error code is always required but the + * message parameter can be NULL, in which case a string describing + * the most recent operating system error is used. + * If the error is for an asynchronous unit and if the program is currently + * executing the asynchronous thread, just mark the error and return. */ + +void +generate_error (st_parameter_common *cmp, int family, const char *message) +{ + if (generate_error_common (cmp, family, message)) + return; + + exit_error(2); } iexport(generate_error); diff --git a/libgomp/ChangeLog b/libgomp/ChangeLog index c285a99ddac..098f469d61c 100644 --- a/libgomp/ChangeLog +++ b/libgomp/ChangeLog @@ -1,3 +1,15 @@ +2018-07-25 Nicolas Koenig + Thomas Koenig + + PR fortran/25829 + * testsuite/libgomp.fortran/async_io_1.f90: New test. + * testsuite/libgomp.fortran/async_io_2.f90: New test. + * testsuite/libgomp.fortran/async_io_3.f90: New test. + * testsuite/libgomp.fortran/async_io_4.f90: New test. + * testsuite/libgomp.fortran/async_io_5.f90: New test. + * testsuite/libgomp.fortran/async_io_6.f90: New test. + * testsuite/libgomp.fortran/async_io_7.f90: New test. + 2018-07-17 Jakub Jelinek PR middle-end/86542