Import of XFree86 3.9.17X_3_9_17

1 files changed, 183 insertions, 0 deletions

diff --git a/xc/extras/Mesa/src/mthreads.c b/xc/extras/Mesa/src/mthreads.c
new file mode 100644
index 000000000..a593d8264
--- /dev/null
+++ b/xc/extras/Mesa/src/mthreads.c
@@ -0,0 +1,183 @@
+/* $Id: mthreads.c,v 1.1.1.1 2000/01/06 13:26:58 faith Exp $ */
+
+/*
+ * Mesa 3-D graphics library
+ * Version:  3.1
+ * 
+ * Copyright (C) 1999  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.
+ */
+
+
+
+
+/*
+ * mthreads.c -- platform dependent thread support for Mesa 
+ *
+ * Initial version by John Stone (j.stone@acm.org) (johns@cs.umr.edu)
+ *                and Christoph Poliwoda (poliwoda@volumegraphics.com)
+ *
+ * Revised by Keith Whitwell
+ */
+
+
+#ifndef XFree86Server
+#include <stdio.h>  /* for printing errors etc. */
+#include <stdlib.h> /* malloc/free and the boys. */
+#include <errno.h>  /* error determination for system calls */
+                    /* NOTE: Some platforms will do bad things with errno  */
+                    /*       if correct compile-time options are not used. */
+                    /*       See mthreads.h for specific examples.         */
+#else
+#include "GL/xf86glx.h"
+#endif
+
+
+/*
+ * 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 "mthreads.h" 
+
+
+/*
+ * 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
+void MesaInitTSD(MesaTSD * tsd) {
+  if (pthread_key_create(&tsd->key, free) != 0) {
+    perror(MESA_INIT_TSD_ERROR);
+    exit(-1);
+  }
+}
+
+void * MesaGetTSD(MesaTSD * tsd) {
+  return pthread_getspecific(tsd->key);
+}
+
+void MesaSetTSD(MesaTSD * tsd, void * ptr, void (*initfunc)(void)) {
+  pthread_once(&tsd->once, initfunc);
+  if (pthread_setspecific(tsd->key, ptr) != 0) {
+    perror(MESA_SET_TSD_ERROR);
+    exit(-1);
+  };
+}
+
+#endif /* PTHREADS */
+
+
+
+/*
+ * Solaris/Unix International Threads -- Use only if POSIX threads 
+ *   aren't available on your Unix platform.  Solaris 2.[34] are examples
+ *   of platforms where this is the case.  Be sure to use -mt and/or 
+ *   -D_REENTRANT when compiling.
+ */
+#ifdef SOLARIS_THREADS
+#define USE_LOCK_FOR_KEY	/* undef this to try a version without
+				   lock for the global key... */
+
+void MesaInitTSD(MesaTSD * tsd) {
+  if ((errno = mutex_init(&tsd->keylock, 0, NULL)) != 0 ||
+      (errno = thr_keycreate(&(tsd->key), free)) != 0) {
+    perror(MESA_INIT_TSD_ERROR);
+    exit(-1);
+  }
+}
+
+void * MesaGetTSD(MesaTSD * tsd) {
+  void* ret;
+#ifdef USE_LOCK_FOR_KEY
+  mutex_lock(&tsd->keylock);
+  thr_getspecific(tsd->key, &ret);
+  mutex_unlock(&tsd->keylock); 
+#else
+  if ((errno = thr_getspecific(tsd->key, &ret)) != 0) {
+    perror(MESA_GET_TSD_ERROR);
+    exit(-1);
+  };
+#endif
+  return ret;
+}
+
+void MesaSetTSD(MesaTSD * tsd, void * ptr, void (*initfunc)(void)) {
+  /* the following code assumes that the MesaTSD has been initialized
+     to zero at creation */
+  fprintf(stderr, "initfuncCalled = %d\n", tsd->initfuncCalled);
+  if (tsd->initfuncCalled != INITFUNC_CALLED_MAGIC) {
+    initfunc();
+    tsd->initfuncCalled = INITFUNC_CALLED_MAGIC;
+  }
+  if ((errno = thr_setspecific(tsd->key, ptr)) != 0) {
+    perror(MESA_SET_TSD_ERROR);
+    exit(-1);
+  };
+}
+
+#undef USE_LOCK_FOR_KEY
+#endif /* SOLARIS_THREADS */
+
+
+
+/*
+ * 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
+
+void MesaInitTSD(MesaTSD * tsd) {
+  tsd->key = TlsAlloc();
+  if (tsd->key == 0xffffffff) {
+    /* Can Windows handle stderr messages for non-console
+       applications? Does Windows have perror? */
+    /* perror(MESA_SET_INIT_ERROR);*/
+    exit(-1);
+  }
+}
+
+void * MesaGetTSD(MesaTSD * tsd) {
+  return TlsGetValue(tsd->key);
+}
+
+void MesaSetTSD(MesaTSD * tsd, void * ptr, void (*initfunc)(void)) {
+  /* the following code assumes that the MesaTSD has been initialized
+     to zero at creation */
+  if (tsd->initfuncCalled != INITFUNC_CALLED_MAGIC) {
+    initfunc();
+    tsd->initfuncCalled = INITFUNC_CALLED_MAGIC;
+  }
+  if (TlsSetValue(tsd->key, ptr) == 0) {
+    /* Can Windows handle stderr messages for non-console
+       applications? Does Windows have perror? */
+    /* perror(MESA_SET_TSD_ERROR);*/
+    exit(-1);
+  };
+}
+
+#endif /* WIN32 */
+
+#endif /* THREADS */
+
+