1 /* Timing variables for measuring compiler performance.
2 Copyright (C) 2000, 2003, 2004 Free Software Foundation, Inc.
3 Contributed by Alex Samuel <samuel@codesourcery.com>
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GCC is distributed in the hope that it will be useful, but WITHOUT
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
15 License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
25 /* Timing variables are used to measure elapsed time in various
26 portions of the compiler. Each measures elapsed user, system, and
27 wall-clock time, as appropriate to and supported by the host
30 Timing variables are defined using the DEFTIMEVAR macro in
31 timevar.def. Each has an enumeral identifier, used when referring
32 to the timing variable in code, and a character string name.
34 Timing variables can be used in two ways:
36 - On the timing stack, using timevar_push and timevar_pop.
37 Timing variables may be pushed onto the stack; elapsed time is
38 attributed to the topmost timing variable on the stack. When
39 another variable is pushed on, the previous topmost variable is
40 `paused' until the pushed variable is popped back off.
42 - As a standalone timer, using timevar_start and timevar_stop.
43 All time elapsed between the two calls is attributed to the
47 /* This structure stores the various varieties of time that can be
48 measured. Times are stored in seconds. The time may be an
49 absolute time or a time difference; in the former case, the time
50 base is undefined, except that the difference between two times
51 produces a valid time difference. */
53 struct timevar_time_def
55 /* User time in this process. */
58 /* System time (if applicable for this host platform) in this
62 /* Wall clock time. */
66 /* An enumeration of timing variable identifiers. Constructed from
67 the contents of timevar.def. */
69 #define DEFTIMEVAR(identifier__, name__) \
73 #include "timevar.def"
79 /* Execute the sequence: timevar_pop (TV), return (E); */
80 #define POP_TIMEVAR_AND_RETURN(TV, E) return (timevar_pop (TV), (E))
82 extern void timevar_init (void);
83 extern void timevar_push (timevar_id_t
);
84 extern void timevar_pop (timevar_id_t
);
85 extern void timevar_start (timevar_id_t
);
86 extern void timevar_stop (timevar_id_t
);
87 extern void timevar_print (FILE *);
89 /* Provided for backward compatibility. */
90 extern void print_time (const char *, long);
92 #endif /* ! GCC_TIMEVAR_H */