1 files changed, 319 insertions, 0 deletions
diff --git a/glx/glthread.h b/glx/glthread.h
new file mode 100644
index 000000000..e2765cebb
--- /dev/null
+++ b/glx/glthread.h
@@ -0,0 +1,319 @@
+/*
+ * 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 */