Imported Debian patch 2:1.15.1-0ubuntu2.6

[deb_xorg-server.git] / glx / glthread.c

diff --git a/glx/glthread.c b/glx/glthread.c
new file mode 100644 (file)
index 0000000..fd4c6cc
--- /dev/null
+++ b/glx/glthread.c
@@ -0,0 +1,204 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  6.5.1
+ *
+ * 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.
+ */
+
+/*
+ * XXX There's probably some work to do in order to make this file
+ * truly reusable outside of Mesa.
+ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#include <X11/Xfuncproto.h>
+#endif
+
+#include <stdlib.h>
+#include <stdio.h>
+#include "glthread.h"
+
+/*
+ * This file should still compile even when THREADS is not defined.
+ * This is to make things easier to deal with on the makefile scene..
+ */
+#ifdef THREADS
+#include <errno.h>
+
+/*
+ * 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
+
+/*
+ * POSIX Threads -- The best way to go if your platform supports them.
+ *                  Solaris >= 2.5 have POSIX threads, IRIX >= 6.4 reportedly
+ *                  has them, and many of the free Unixes now have them.
+ *                  Be sure to use appropriate -mt or -D_REENTRANT type
+ *                  compile flags when building.
+ */
+#ifdef PTHREADS
+
+_X_EXPORT unsigned long
+_glthread_GetID(void)
+{
+    return (unsigned long) pthread_self();
+}
+
+void
+_glthread_InitTSD(_glthread_TSD * tsd)
+{
+    if (pthread_key_create(&tsd->key, NULL /*free */ ) != 0) {
+        perror(INIT_TSD_ERROR);
+        exit(-1);
+    }
+    tsd->initMagic = INIT_MAGIC;
+}
+
+void *
+_glthread_GetTSD(_glthread_TSD * tsd)
+{
+    if (tsd->initMagic != (int) INIT_MAGIC) {
+        _glthread_InitTSD(tsd);
+    }
+    return pthread_getspecific(tsd->key);
+}
+
+void
+_glthread_SetTSD(_glthread_TSD * tsd, void *ptr)
+{
+    if (tsd->initMagic != (int) INIT_MAGIC) {
+        _glthread_InitTSD(tsd);
+    }
+    if (pthread_setspecific(tsd->key, ptr) != 0) {
+        perror(SET_TSD_ERROR);
+        exit(-1);
+    }
+}
+
+#endif                          /* PTHREADS */
+
+/*
+ * Win32 Threads.  The only available option for Windows 95/NT.
+ * Be sure that you compile using the Multithreaded runtime, otherwise
+ * bad things will happen.
+ */
+#ifdef WIN32_THREADS
+
+void
+FreeTSD(_glthread_TSD * p)
+{
+    if (p->initMagic == INIT_MAGIC) {
+        TlsFree(p->key);
+        p->initMagic = 0;
+    }
+}
+
+void
+InsteadOf_exit(int nCode)
+{
+    DWORD dwErr = GetLastError();
+}
+
+unsigned long
+_glthread_GetID(void)
+{
+    return GetCurrentThreadId();
+}
+
+void
+_glthread_InitTSD(_glthread_TSD * tsd)
+{
+    tsd->key = TlsAlloc();
+    if (tsd->key == TLS_OUT_OF_INDEXES) {
+        perror("Mesa:_glthread_InitTSD");
+        InsteadOf_exit(-1);
+    }
+    tsd->initMagic = INIT_MAGIC;
+}
+
+void *
+_glthread_GetTSD(_glthread_TSD * tsd)
+{
+    if (tsd->initMagic != INIT_MAGIC) {
+        _glthread_InitTSD(tsd);
+    }
+    return TlsGetValue(tsd->key);
+}
+
+void
+_glthread_SetTSD(_glthread_TSD * tsd, void *ptr)
+{
+    /* the following code assumes that the _glthread_TSD has been initialized
+       to zero at creation */
+    if (tsd->initMagic != INIT_MAGIC) {
+        _glthread_InitTSD(tsd);
+    }
+    if (TlsSetValue(tsd->key, ptr) == 0) {
+        perror("Mesa:_glthread_SetTSD");
+        InsteadOf_exit(-1);
+    }
+}
+
+#endif                          /* WIN32_THREADS */
+
+#else                           /* THREADS */
+
+/*
+ * no-op functions
+ */
+
+_X_EXPORT unsigned long
+_glthread_GetID(void)
+{
+    return 0;
+}
+
+void
+_glthread_InitTSD(_glthread_TSD * tsd)
+{
+    (void) tsd;
+}
+
+void *
+_glthread_GetTSD(_glthread_TSD * tsd)
+{
+    (void) tsd;
+    return NULL;
+}
+
+void
+_glthread_SetTSD(_glthread_TSD * tsd, void *ptr)
+{
+    (void) tsd;
+    (void) ptr;
+}
+
+#endif                          /* THREADS */