1 files changed, 287 insertions, 0 deletions
diff --git a/src/mapi/u_thread.h b/src/mapi/u_thread.h
new file mode 100644
index 0000000000..a5e5043701
--- /dev/null
+++ b/src/mapi/u_thread.h
@@ -0,0 +1,287 @@
+/*
+ * 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
+ * Modified for use in mapi by Chia-I Wu
+ */
+
+/*
+ * 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 _U_THREAD_H_
+#define _U_THREAD_H_
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "u_compiler.h"
+
+#if defined(HAVE_PTHREAD)
+#include <pthread.h> /* POSIX threads headers */
+#endif
+#ifdef _WIN32
+#include <windows.h>
+#endif
+
+#if defined(HAVE_PTHREAD) || defined(_WIN32)
+#ifndef THREADS
+#define THREADS
+#endif
+#endif
+
+/*
+ * Error messages
+ */
+#define INIT_TSD_ERROR "_glthread_: failed to allocate key for thread specific data"
+#define GET_TSD_ERROR "_glthread_: failed to get thread specific data"
+#define SET_TSD_ERROR "_glthread_: thread failed to set thread specific data"
+
+
+/*
+ * Magic number to determine if a TSD object has been initialized.
+ * Kind of a hack but there doesn't appear to be a better cross-platform
+ * solution.
+ */
+#define INIT_MAGIC 0xff8adc98
+
+#ifdef __cplusplus
+extern "C" {
+#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(HAVE_PTHREAD)
+
+struct u_tsd {
+   pthread_key_t key;
+   unsigned initMagic;
+};
+
+typedef pthread_mutex_t u_mutex;
+
+#define u_mutex_declare_static(name) \
+   static u_mutex name = PTHREAD_MUTEX_INITIALIZER
+
+#define u_mutex_init(name)    pthread_mutex_init(&(name), NULL)
+#define u_mutex_destroy(name) pthread_mutex_destroy(&(name))
+#define u_mutex_lock(name)    (void) pthread_mutex_lock(&(name))
+#define u_mutex_unlock(name)  (void) pthread_mutex_unlock(&(name))
+
+static INLINE unsigned long
+u_thread_self(void)
+{
+   return (unsigned long) pthread_self();
+}
+
+
+static INLINE void
+u_tsd_init(struct u_tsd *tsd)
+{
+   if (pthread_key_create(&tsd->key, NULL/*free*/) != 0) {
+      perror(INIT_TSD_ERROR);
+      exit(-1);
+   }
+   tsd->initMagic = INIT_MAGIC;
+}
+
+
+static INLINE void *
+u_tsd_get(struct u_tsd *tsd)
+{
+   if (tsd->initMagic != INIT_MAGIC) {
+      u_tsd_init(tsd);
+   }
+   return pthread_getspecific(tsd->key);
+}
+
+
+static INLINE void
+u_tsd_set(struct u_tsd *tsd, void *ptr)
+{
+   if (tsd->initMagic != INIT_MAGIC) {
+      u_tsd_init(tsd);
+   }
+   if (pthread_setspecific(tsd->key, ptr) != 0) {
+      perror(SET_TSD_ERROR);
+      exit(-1);
+   }
+}
+
+#endif /* HAVE_PTHREAD */
+
+
+/*
+ * Windows threads. Should work with Windows NT and 95.
+ * IMPORTANT: Link with multithreaded runtime library when THREADS are
+ * used!
+ */
+#ifdef _WIN32
+
+struct u_tsd {
+   DWORD key;
+   unsigned initMagic;
+};
+
+typedef CRITICAL_SECTION u_mutex;
+
+/* http://locklessinc.com/articles/pthreads_on_windows/ */
+#define u_mutex_declare_static(name) \
+   static u_mutex name = {(PCRITICAL_SECTION_DEBUG)-1, -1, 0, 0, 0, 0}
+
+#define u_mutex_init(name)    InitializeCriticalSection(&name)
+#define u_mutex_destroy(name) DeleteCriticalSection(&name)
+#define u_mutex_lock(name)    EnterCriticalSection(&name)
+#define u_mutex_unlock(name)  LeaveCriticalSection(&name)
+
+static INLINE unsigned long
+u_thread_self(void)
+{
+   return GetCurrentThreadId();
+}
+
+
+static INLINE void
+u_tsd_init(struct u_tsd *tsd)
+{
+   tsd->key = TlsAlloc();
+   if (tsd->key == TLS_OUT_OF_INDEXES) {
+      perror(INIT_TSD_ERROR);
+      exit(-1);
+   }
+   tsd->initMagic = INIT_MAGIC;
+}
+
+
+static INLINE void
+u_tsd_destroy(struct u_tsd *tsd)
+{
+   if (tsd->initMagic != INIT_MAGIC) {
+      return;
+   }
+   TlsFree(tsd->key);
+   tsd->initMagic = 0x0;
+}
+
+
+static INLINE void *
+u_tsd_get(struct u_tsd *tsd)
+{
+   if (tsd->initMagic != INIT_MAGIC) {
+      u_tsd_init(tsd);
+   }
+   return TlsGetValue(tsd->key);
+}
+
+
+static INLINE void
+u_tsd_set(struct u_tsd *tsd, void *ptr)
+{
+   /* the following code assumes that the struct u_tsd has been initialized
+      to zero at creation */
+   if (tsd->initMagic != INIT_MAGIC) {
+      u_tsd_init(tsd);
+   }
+   if (TlsSetValue(tsd->key, ptr) == 0) {
+      perror(SET_TSD_ERROR);
+      exit(-1);
+   }
+}
+
+#endif /* _WIN32 */
+
+
+/*
+ * THREADS not defined
+ */
+#ifndef THREADS
+
+struct u_tsd {
+   unsigned initMagic;
+};
+
+typedef unsigned u_mutex;
+
+#define u_mutex_declare_static(name)   static u_mutex name = 0
+#define u_mutex_init(name)             (void) name
+#define u_mutex_destroy(name)          (void) name
+#define u_mutex_lock(name)             (void) name
+#define u_mutex_unlock(name)           (void) name
+
+/*
+ * no-op functions
+ */
+
+static INLINE unsigned long
+u_thread_self(void)
+{
+   return 0;
+}
+
+
+static INLINE void
+u_tsd_init(struct u_tsd *tsd)
+{
+   (void) tsd;
+}
+
+
+static INLINE void *
+u_tsd_get(struct u_tsd *tsd)
+{
+   (void) tsd;
+   return NULL;
+}
+
+
+static INLINE void
+u_tsd_set(struct u_tsd *tsd, void *ptr)
+{
+   (void) tsd;
+   (void) ptr;
+}
+#endif /* THREADS */
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _U_THREAD_H_ */