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/*
* 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 */
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