| /* |
| * Mesa 3-D graphics library |
| * Version: 6.5.2 |
| * |
| * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included |
| * in all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN |
| * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| */ |
| |
| |
| /* |
| * Thread support for gl dispatch. |
| * |
| * 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. |
| */ |
| |
| #ifndef GLTHREAD_H |
| #define GLTHREAD_H |
| |
| |
| #if defined(USE_MGL_NAMESPACE) |
| #define _glapi_Dispatch _mglapi_Dispatch |
| #endif |
| |
| |
| |
| #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 |
| |
| /* |
| * 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 */ |
| |
| typedef struct { |
| pthread_key_t key; |
| int initMagic; |
| } _glthread_TSD; |
| |
| typedef pthread_t _glthread_Thread; |
| |
| typedef pthread_mutex_t _glthread_Mutex; |
| |
| #define _glthread_DECLARE_STATIC_MUTEX(name) \ |
| static _glthread_Mutex name = PTHREAD_MUTEX_INITIALIZER |
| |
| #define _glthread_INIT_MUTEX(name) \ |
| pthread_mutex_init(&(name), NULL) |
| |
| #define _glthread_DESTROY_MUTEX(name) \ |
| pthread_mutex_destroy(&(name)) |
| |
| #define _glthread_LOCK_MUTEX(name) \ |
| (void) pthread_mutex_lock(&(name)) |
| |
| #define _glthread_UNLOCK_MUTEX(name) \ |
| (void) pthread_mutex_unlock(&(name)) |
| |
| #endif /* PTHREADS */ |
| |
| |
| |
| |
| /* |
| * 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; |
| |
| typedef thread_t _glthread_Thread; |
| |
| typedef mutex_t _glthread_Mutex; |
| |
| /* 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 |
| |
| #endif /* SOLARIS_THREADS */ |
| |
| |
| |
| |
| /* |
| * 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 */ |
| |
| |
| |
| |
| /* |
| * 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; |
| |
| 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 |
| |
| #define _glthread_INIT_MUTEX(name) \ |
| xmutex_init(&(name)) |
| |
| #define _glthread_DESTROY_MUTEX(name) \ |
| xmutex_clear(&(name)) |
| |
| #define _glthread_LOCK_MUTEX(name) \ |
| (void) xmutex_lock(&(name)) |
| |
| #define _glthread_UNLOCK_MUTEX(name) \ |
| (void) xmutex_unlock(&(name)) |
| |
| #endif /* USE_XTHREADS */ |
| |
| |
| |
| /* |
| * BeOS threads. R5.x required. |
| */ |
| #ifdef BEOS_THREADS |
| |
| #include <kernel/OS.h> |
| #include <support/TLS.h> |
| |
| typedef struct { |
| int32 key; |
| int initMagic; |
| } _glthread_TSD; |
| |
| typedef thread_id _glthread_Thread; |
| |
| /* Use Benaphore, aka speeder semaphore */ |
| typedef struct { |
| int32 lock; |
| sem_id sem; |
| } benaphore; |
| typedef benaphore _glthread_Mutex; |
| |
| #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) |
| |
| #endif /* BEOS_THREADS */ |
| |
| |
| |
| #ifndef THREADS |
| |
| /* |
| * THREADS not defined |
| */ |
| |
| typedef int _glthread_TSD; |
| |
| typedef int _glthread_Thread; |
| |
| typedef int _glthread_Mutex; |
| |
| #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 |
| |
| #endif /* THREADS */ |
| |
| |
| |
| /* |
| * Platform independent thread specific data API. |
| */ |
| |
| extern unsigned long |
| _glthread_GetID(void); |
| |
| |
| extern void |
| _glthread_InitTSD(_glthread_TSD *); |
| |
| |
| extern void * |
| _glthread_GetTSD(_glthread_TSD *); |
| |
| |
| extern void |
| _glthread_SetTSD(_glthread_TSD *, void *); |
| |
| #if defined(GLX_USE_TLS) |
| |
| extern __thread struct _glapi_table * _glapi_tls_Dispatch |
| __attribute__((tls_model("initial-exec"))); |
| |
| #define GET_DISPATCH() _glapi_tls_Dispatch |
| |
| #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 /* THREADS_H */ |