*
**************************************************************************/
+
/**
* @file
- * Thread
- *
- * Initial version by John Stone (j.stone@acm.org) (johns@cs.umr.edu)
- * and Christoph Poliwoda (poliwoda@volumegraphics.com)
- * Revised by Keith Whitwell
- * Adapted for new gl dispatcher by Brian Paul
- *
- *
- *
- * DOCUMENTATION
- *
- * This thread module exports the following types:
- * _glthread_TSD Thread-specific data area
- * _glthread_Thread Thread datatype
- * _glthread_Mutex Mutual exclusion lock
- *
- * Macros:
- * _glthread_DECLARE_STATIC_MUTEX(name) Declare a non-local mutex
- * _glthread_INIT_MUTEX(name) Initialize a mutex
- * _glthread_LOCK_MUTEX(name) Lock a mutex
- * _glthread_UNLOCK_MUTEX(name) Unlock a mutex
- *
- * Functions:
- * _glthread_GetID(v) Get integer thread ID
- * _glthread_InitTSD() Initialize thread-specific data
- * _glthread_GetTSD() Get thread-specific data
- * _glthread_SetTSD() Set thread-specific data
- *
- * If this file is accidentally included by a non-threaded build,
- * it should not cause the build to fail, or otherwise cause problems.
- * In general, it should only be included when needed however.
+ *
+ * Thread, mutex, condition var and thread-specific data functions.
*/
-#ifndef _P_THREAD_H_
-#define _P_THREAD_H_
-
-#if defined(USE_MGL_NAMESPACE)
-#define _glapi_Dispatch _mglapi_Dispatch
-#endif
+#ifndef _P_THREAD2_H_
+#define _P_THREAD2_H_
+#include "pipe/p_compiler.h"
+#include "util/u_debug.h" /* for assert */
-#if (defined(PTHREADS) || defined(SOLARIS_THREADS) ||\
- defined(WIN32_THREADS) || defined(USE_XTHREADS) || defined(BEOS_THREADS)) \
- && !defined(THREADS)
-# define THREADS
-#endif
-#ifdef VMS
-#include <GL/vms_x_fix.h>
-#endif
+#if defined(PIPE_OS_LINUX) || defined(PIPE_OS_BSD) || defined(PIPE_OS_SOLARIS)
-/*
- * POSIX threads. This should be your choice in the Unix world
- * whenever possible. When building with POSIX threads, be sure
- * to enable any compiler flags which will cause the MT-safe
- * libc (if one exists) to be used when linking, as well as any
- * header macros for MT-safe errno, etc. For Solaris, this is the -mt
- * compiler flag. On Solaris with gcc, use -D_REENTRANT to enable
- * proper compiling for MT-safe libc etc.
- */
-#if defined(PTHREADS)
#include <pthread.h> /* POSIX threads headers */
+#include <stdio.h> /* for perror() */
-typedef struct {
- pthread_key_t key;
- int initMagic;
-} _glthread_TSD;
+#define PIPE_THREAD_HAVE_CONDVAR
-typedef pthread_t _glthread_Thread;
+typedef pthread_t pipe_thread;
-typedef pthread_mutex_t _glthread_Mutex;
+#define PIPE_THREAD_ROUTINE( name, param ) \
+ void *name( void *param )
-#define _glthread_DECLARE_STATIC_MUTEX(name) \
- static _glthread_Mutex name = PTHREAD_MUTEX_INITIALIZER
+static INLINE pipe_thread pipe_thread_create( void *(* routine)( void *), void *param )
+{
+ pipe_thread thread;
+ if (pthread_create( &thread, NULL, routine, param ))
+ return 0;
+ return thread;
+}
-#define _glthread_INIT_MUTEX(name) \
- pthread_mutex_init(&(name), NULL)
+static INLINE int pipe_thread_wait( pipe_thread thread )
+{
+ return pthread_join( thread, NULL );
+}
-#define _glthread_DESTROY_MUTEX(name) \
- pthread_mutex_destroy(&(name))
+static INLINE int pipe_thread_destroy( pipe_thread thread )
+{
+ return pthread_detach( thread );
+}
-#define _glthread_LOCK_MUTEX(name) \
- (void) pthread_mutex_lock(&(name))
+typedef pthread_mutex_t pipe_mutex;
+typedef pthread_cond_t pipe_condvar;
-#define _glthread_UNLOCK_MUTEX(name) \
- (void) pthread_mutex_unlock(&(name))
+#define pipe_static_mutex(mutex) \
+ static pipe_mutex mutex = PTHREAD_MUTEX_INITIALIZER
-#endif /* PTHREADS */
+#define pipe_mutex_init(mutex) \
+ (void) pthread_mutex_init(&(mutex), NULL)
+#define pipe_mutex_destroy(mutex) \
+ pthread_mutex_destroy(&(mutex))
+#define pipe_mutex_lock(mutex) \
+ (void) pthread_mutex_lock(&(mutex))
+#define pipe_mutex_unlock(mutex) \
+ (void) pthread_mutex_unlock(&(mutex))
-/*
- * Solaris threads. Use only up to Solaris 2.4.
- * Solaris 2.5 and higher provide POSIX threads.
- * Be sure to compile with -mt on the Solaris compilers, or
- * use -D_REENTRANT if using gcc.
- */
-#ifdef SOLARIS_THREADS
-#include <thread.h>
-
-typedef struct {
- thread_key_t key;
- mutex_t keylock;
- int initMagic;
-} _glthread_TSD;
+#define pipe_static_condvar(mutex) \
+ static pipe_condvar mutex = PTHREAD_COND_INITIALIZER
-typedef thread_t _glthread_Thread;
+#define pipe_condvar_init(cond) \
+ pthread_cond_init(&(cond), NULL)
-typedef mutex_t _glthread_Mutex;
+#define pipe_condvar_destroy(cond) \
+ pthread_cond_destroy(&(cond))
-/* XXX need to really implement mutex-related macros */
-#define _glthread_DECLARE_STATIC_MUTEX(name) static _glthread_Mutex name = 0
-#define _glthread_INIT_MUTEX(name) (void) name
-#define _glthread_DESTROY_MUTEX(name) (void) name
-#define _glthread_LOCK_MUTEX(name) (void) name
-#define _glthread_UNLOCK_MUTEX(name) (void) name
+#define pipe_condvar_wait(cond, mutex) \
+ pthread_cond_wait(&(cond), &(mutex))
-#endif /* SOLARIS_THREADS */
+#define pipe_condvar_signal(cond) \
+ pthread_cond_signal(&(cond))
+#define pipe_condvar_broadcast(cond) \
+ pthread_cond_broadcast(&(cond))
+#elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
-/*
- * Windows threads. Should work with Windows NT and 95.
- * IMPORTANT: Link with multithreaded runtime library when THREADS are
- * used!
- */
-#ifdef WIN32_THREADS
#include <windows.h>
-typedef struct {
- DWORD key;
- int initMagic;
-} _glthread_TSD;
-
-typedef HANDLE _glthread_Thread;
-
-typedef CRITICAL_SECTION _glthread_Mutex;
-
-#define _glthread_DECLARE_STATIC_MUTEX(name) /*static*/ _glthread_Mutex name = {0,0,0,0,0,0}
-#define _glthread_INIT_MUTEX(name) InitializeCriticalSection(&name)
-#define _glthread_DESTROY_MUTEX(name) DeleteCriticalSection(&name)
-#define _glthread_LOCK_MUTEX(name) EnterCriticalSection(&name)
-#define _glthread_UNLOCK_MUTEX(name) LeaveCriticalSection(&name)
-
-#endif /* WIN32_THREADS */
-
+typedef HANDLE pipe_thread;
+#define PIPE_THREAD_ROUTINE( name, param ) \
+ void * WINAPI name( void *param )
+static INLINE pipe_thread pipe_thread_create( void *(WINAPI * routine)( void *), void *param )
+{
+ DWORD id;
+ return CreateThread( NULL, 0, (LPTHREAD_START_ROUTINE) routine, param, 0, &id );
+}
-/*
- * XFree86 has its own thread wrapper, Xthreads.h
- * We wrap it again for GL.
- */
-#ifdef USE_XTHREADS
-#include <X11/Xthreads.h>
-
-typedef struct {
- xthread_key_t key;
- int initMagic;
-} _glthread_TSD;
-
-typedef xthread_t _glthread_Thread;
+static INLINE int pipe_thread_wait( pipe_thread thread )
+{
+ if (WaitForSingleObject( thread, INFINITE ) == WAIT_OBJECT_0)
+ return 0;
+ return -1;
+}
-typedef xmutex_rec _glthread_Mutex;
-
-#ifdef XMUTEX_INITIALIZER
-#define _glthread_DECLARE_STATIC_MUTEX(name) \
- static _glthread_Mutex name = XMUTEX_INITIALIZER
-#else
-#define _glthread_DECLARE_STATIC_MUTEX(name) \
- static _glthread_Mutex name
-#endif
+static INLINE int pipe_thread_destroy( pipe_thread thread )
+{
+ if (CloseHandle( thread ))
+ return 0;
+ return -1;
+}
-#define _glthread_INIT_MUTEX(name) \
- xmutex_init(&(name))
+typedef CRITICAL_SECTION pipe_mutex;
-#define _glthread_DESTROY_MUTEX(name) \
- xmutex_clear(&(name))
+#define pipe_static_mutex(mutex) \
+ /*static*/ pipe_mutex mutex = {0,0,0,0,0,0}
-#define _glthread_LOCK_MUTEX(name) \
- (void) xmutex_lock(&(name))
+#define pipe_mutex_init(mutex) \
+ InitializeCriticalSection(&mutex)
-#define _glthread_UNLOCK_MUTEX(name) \
- (void) xmutex_unlock(&(name))
+#define pipe_mutex_destroy(mutex) \
+ DeleteCriticalSection(&mutex)
-#endif /* USE_XTHREADS */
+#define pipe_mutex_lock(mutex) \
+ EnterCriticalSection(&mutex)
+#define pipe_mutex_unlock(mutex) \
+ LeaveCriticalSection(&mutex)
+/* XXX: dummy definitions, make it compile */
-/*
- * BeOS threads. R5.x required.
- */
-#ifdef BEOS_THREADS
+typedef unsigned pipe_condvar;
-#include <kernel/OS.h>
-#include <support/TLS.h>
+#define pipe_condvar_init(condvar) \
+ (void) condvar
-typedef struct {
- int32 key;
- int initMagic;
-} _glthread_TSD;
+#define pipe_condvar_broadcast(condvar) \
+ (void) condvar
-typedef thread_id _glthread_Thread;
+#else
-/* Use Benaphore, aka speeder semaphore */
-typedef struct {
- int32 lock;
- sem_id sem;
-} benaphore;
-typedef benaphore _glthread_Mutex;
+/** Dummy definitions */
-#define _glthread_DECLARE_STATIC_MUTEX(name) static _glthread_Mutex name = { 0, 0 }
-#define _glthread_INIT_MUTEX(name) name.sem = create_sem(0, #name"_benaphore"), name.lock = 0
-#define _glthread_DESTROY_MUTEX(name) delete_sem(name.sem), name.lock = 0
-#define _glthread_LOCK_MUTEX(name) if (name.sem == 0) _glthread_INIT_MUTEX(name); \
- if (atomic_add(&(name.lock), 1) >= 1) acquire_sem(name.sem)
-#define _glthread_UNLOCK_MUTEX(name) if (atomic_add(&(name.lock), -1) > 1) release_sem(name.sem)
+typedef unsigned pipe_thread;
+typedef unsigned pipe_mutex;
+typedef unsigned pipe_condvar;
-#endif /* BEOS_THREADS */
+#define pipe_static_mutex(mutex) \
+ static pipe_mutex mutex = 0
+#define pipe_mutex_init(mutex) \
+ (void) mutex
+#define pipe_mutex_destroy(mutex) \
+ (void) mutex
-#ifndef THREADS
+#define pipe_mutex_lock(mutex) \
+ (void) mutex
-/*
- * THREADS not defined
- */
+#define pipe_mutex_unlock(mutex) \
+ (void) mutex
-typedef unsigned _glthread_TSD;
+#define pipe_static_condvar(condvar) \
+ static unsigned condvar = 0
-typedef unsigned _glthread_Thread;
+#define pipe_condvar_init(condvar) \
+ (void) condvar
-typedef unsigned _glthread_Mutex;
+#define pipe_condvar_destroy(condvar) \
+ (void) condvar
-#define _glthread_DECLARE_STATIC_MUTEX(name) static _glthread_Mutex name = 0
+#define pipe_condvar_wait(condvar, mutex) \
+ (void) condvar
-#define _glthread_INIT_MUTEX(name) (void) name
+#define pipe_condvar_signal(condvar) \
+ (void) condvar
-#define _glthread_DESTROY_MUTEX(name) (void) name
+#define pipe_condvar_broadcast(condvar) \
+ (void) condvar
-#define _glthread_LOCK_MUTEX(name) (void) name
-#define _glthread_UNLOCK_MUTEX(name) (void) name
-
-#endif /* THREADS */
+#endif /* PIPE_OS_? */
/*
- * Platform independent thread specific data API.
+ * Thread-specific data.
*/
-extern unsigned long
-_glthread_GetID(void);
-
-
-extern void
-_glthread_InitTSD(_glthread_TSD *);
-
-
-extern void *
-_glthread_GetTSD(_glthread_TSD *);
-
+typedef struct {
+#if defined(PIPE_OS_LINUX) || defined(PIPE_OS_BSD) || defined(PIPE_OS_SOLARIS)
+ pthread_key_t key;
+#elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
+ DWORD key;
+#endif
+ int initMagic;
+} pipe_tsd;
-extern void
-_glthread_SetTSD(_glthread_TSD *, void *);
-#if defined(GLX_USE_TLS)
+#define PIPE_TSD_INIT_MAGIC 0xff8adc98
-extern __thread struct _glapi_table * _glapi_tls_Dispatch
- __attribute__((tls_model("initial-exec")));
-#define GET_DISPATCH() _glapi_tls_Dispatch
+static INLINE void
+pipe_tsd_init(pipe_tsd *tsd)
+{
+#if defined(PIPE_OS_LINUX) || defined(PIPE_OS_BSD) || defined(PIPE_OS_SOLARIS)
+ if (pthread_key_create(&tsd->key, NULL/*free*/) != 0) {
+ perror("pthread_key_create(): failed to allocate key for thread specific data");
+ exit(-1);
+ }
+#elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
+ assert(0);
+#endif
+ tsd->initMagic = PIPE_TSD_INIT_MAGIC;
+}
+
+static INLINE void *
+pipe_tsd_get(pipe_tsd *tsd)
+{
+ if (tsd->initMagic != (int) PIPE_TSD_INIT_MAGIC) {
+ pipe_tsd_init(tsd);
+ }
+#if defined(PIPE_OS_LINUX) || defined(PIPE_OS_BSD) || defined(PIPE_OS_SOLARIS)
+ return pthread_getspecific(tsd->key);
+#elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
+ assert(0);
+ return NULL;
+#else
+ assert(0);
+ return NULL;
+#endif
+}
+
+static INLINE void
+pipe_tsd_set(pipe_tsd *tsd, void *value)
+{
+ if (tsd->initMagic != (int) PIPE_TSD_INIT_MAGIC) {
+ pipe_tsd_init(tsd);
+ }
+#if defined(PIPE_OS_LINUX) || defined(PIPE_OS_BSD) || defined(PIPE_OS_SOLARIS)
+ if (pthread_setspecific(tsd->key, value) != 0) {
+ perror("pthread_set_specific() failed");
+ exit(-1);
+ }
+#elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
+ assert(0);
+#else
+ assert(0);
+#endif
+}
-#elif !defined(GL_CALL)
-# if defined(THREADS)
-# define GET_DISPATCH() \
- ((__builtin_expect( _glapi_Dispatch != NULL, 1 )) \
- ? _glapi_Dispatch : _glapi_get_dispatch())
-# else
-# define GET_DISPATCH() _glapi_Dispatch
-# endif /* defined(THREADS) */
-#endif /* ndef GL_CALL */
-#endif /* _P_THREAD_H_ */
+#endif /* _P_THREAD2_H_ */
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