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+/*
+ * 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(PTHREADS) || defined(WIN32_THREADS) || defined(BEOS_THREADS)
+#ifndef THREADS
+#define THREADS
+#endif
+#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 */
+
+
+/*
+ * 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 */
+
+
+/*
+ * BeOS threads. R5.x required.
+ */
+#ifdef BEOS_THREADS
+
+/* Problem with OS.h and this file on haiku */
+#ifndef __HAIKU__
+#include <kernel/OS.h>
+#endif
+
+#include <support/TLS.h>
+
+/* The only two typedefs required here
+ * this is cause of the OS.h problem
+ */
+#ifdef __HAIKU__
+typedef int32 thread_id;
+typedef int32 sem_id;
+#endif
+
+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 */
+
+
+/*
+ * THREADS not defined
+ */
+#ifndef THREADS
+
+typedef unsigned _glthread_TSD;
+
+typedef unsigned _glthread_Thread;
+
+typedef unsigned _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_DestroyTSD(_glthread_TSD *); /* WIN32 only */
+
+
+extern void *
+_glthread_GetTSD(_glthread_TSD *);
+
+
+extern void
+_glthread_SetTSD(_glthread_TSD *, void *);
+
+
+#endif /* THREADS_H */