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/*
* 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 "u_compiler.h"
#if defined(PTHREADS) || defined(WIN32) || defined(BEOS_THREADS)
#ifndef THREADS
#define THREADS
#endif
#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(PTHREADS)
#include <pthread.h> /* POSIX threads headers */
struct u_tsd {
pthread_key_t key;
int 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))
#endif /* PTHREADS */
/*
* Windows threads. Should work with Windows NT and 95.
* IMPORTANT: Link with multithreaded runtime library when THREADS are
* used!
*/
#ifdef WIN32
#include <windows.h>
struct u_tsd {
DWORD key;
int 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)
#endif /* WIN32 */
/*
* BeOS threads. R5.x required.
*/
#ifdef BEOS_THREADS
/* Problem with OS.h and this file on haiku */
#ifndef __HAIKU__
#include <kernel/OS.h>
#endif
#include <support/TLS.h>
/* The only two typedefs required here
* this is cause of the OS.h problem
*/
#ifdef __HAIKU__
typedef int32 thread_id;
typedef int32 sem_id;
#endif
struct u_tsd {
int32 key;
int initMagic;
};
/* Use Benaphore, aka speeder semaphore */
typedef struct {
int32 lock;
sem_id sem;
} benaphore;
typedef benaphore u_mutex;
#define u_mutex_declare_static(name) \
static u_mutex name = { 0, 0 }
#define u_mutex_init(name) \
name.sem = create_sem(0, #name"_benaphore"), \
name.lock = 0
#define u_mutex_destroy(name) \
delete_sem(name.sem), \
name.lock = 0
#define u_mutex_lock(name) \
if (name.sem == 0) \
u_mutex_init(name); \
if (atomic_add(&(name.lock), 1) >= 1) \
acquire_sem(name.sem)
#define u_mutex_unlock(name) \
if (atomic_add(&(name.lock), -1) > 1) \
release_sem(name.sem)
#endif /* BEOS_THREADS */
/*
* THREADS not defined
*/
#ifndef THREADS
struct u_tsd {
int 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
#endif /* THREADS */
unsigned long
u_thread_self(void);
void
u_tsd_init(struct u_tsd *tsd);
void
u_tsd_destroy(struct u_tsd *tsd); /* WIN32 only */
void *
u_tsd_get(struct u_tsd *tsd);
void
u_tsd_set(struct u_tsd *tsd, void *ptr);
#endif /* _U_THREAD_H_ */
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