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148 lines
3.6 KiB
C
148 lines
3.6 KiB
C
/*
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* Mesa 3-D graphics library
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*
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* Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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/*
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* Thread support for gl dispatch.
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*
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* Initial version by John Stone (j.stone@acm.org) (johns@cs.umr.edu)
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* and Christoph Poliwoda (poliwoda@volumegraphics.com)
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* Revised by Keith Whitwell
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* Adapted for new gl dispatcher by Brian Paul
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* Modified for use in mapi by Chia-I Wu
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*/
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/*
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* If this file is accidentally included by a non-threaded build,
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* it should not cause the build to fail, or otherwise cause problems.
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* In general, it should only be included when needed however.
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*/
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#ifndef _U_THREAD_H_
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#define _U_THREAD_H_
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#include <stdio.h>
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#include <stdlib.h>
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#include "u_compiler.h"
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#include "c11/threads.h"
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#if defined(HAVE_PTHREAD) || defined(_WIN32)
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#ifndef THREADS
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#define THREADS
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#endif
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#endif
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/*
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* Error messages
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*/
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#define INIT_TSD_ERROR "_glthread_: failed to allocate key for thread specific data"
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#define GET_TSD_ERROR "_glthread_: failed to get thread specific data"
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#define SET_TSD_ERROR "_glthread_: thread failed to set thread specific data"
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/*
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* Magic number to determine if a TSD object has been initialized.
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* Kind of a hack but there doesn't appear to be a better cross-platform
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* solution.
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*/
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#define INIT_MAGIC 0xff8adc98
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct u_tsd {
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tss_t key;
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unsigned initMagic;
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};
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typedef mtx_t u_mutex;
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#define u_mutex_declare_static(name) \
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static u_mutex name = _MTX_INITIALIZER_NP
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#define u_mutex_init(name) mtx_init(&(name), mtx_plain)
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#define u_mutex_destroy(name) mtx_destroy(&(name))
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#define u_mutex_lock(name) (void) mtx_lock(&(name))
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#define u_mutex_unlock(name) (void) mtx_unlock(&(name))
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static INLINE unsigned long
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u_thread_self(void)
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{
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return (unsigned long) (uintptr_t) thrd_current();
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}
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static INLINE void
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u_tsd_init(struct u_tsd *tsd)
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{
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if (tss_create(&tsd->key, NULL/*free*/) != 0) {
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perror(INIT_TSD_ERROR);
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exit(-1);
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}
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tsd->initMagic = INIT_MAGIC;
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}
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static INLINE void *
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u_tsd_get(struct u_tsd *tsd)
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{
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if (tsd->initMagic != INIT_MAGIC) {
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u_tsd_init(tsd);
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}
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return tss_get(tsd->key);
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}
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static INLINE void
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u_tsd_set(struct u_tsd *tsd, void *ptr)
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{
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if (tsd->initMagic != INIT_MAGIC) {
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u_tsd_init(tsd);
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}
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if (tss_set(tsd->key, ptr) != 0) {
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perror(SET_TSD_ERROR);
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exit(-1);
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}
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}
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static INLINE void
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u_tsd_destroy(struct u_tsd *tsd)
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{
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if (tsd->initMagic != INIT_MAGIC) {
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return;
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}
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tss_delete(tsd->key);
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tsd->initMagic = 0x0;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* _U_THREAD_H_ */
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