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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.

 */

#include 

#include 

#include "u_compiler.h"

#include "u_thread.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 

/*

 * 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

unsigned long

u_thread_self(void)

{

   return (unsigned long) pthread_self();

}

void

u_tsd_init(struct u_tsd *tsd)

{

   if (pthread_key_create(&tsd->key, NULL/*free*/) != 0) {

      perror(INIT_TSD_ERROR);

      exit(-1);

   }

   tsd->initMagic = INIT_MAGIC;

}

void *

u_tsd_get(struct u_tsd *tsd)

{

   if (tsd->initMagic != (int) INIT_MAGIC) {

      u_tsd_init(tsd);

   }

   return pthread_getspecific(tsd->key);

}

void

u_tsd_set(struct u_tsd *tsd, void *ptr)

{

   if (tsd->initMagic != (int) INIT_MAGIC) {

      u_tsd_init(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

static void InsteadOf_exit(int nCode)

{

   DWORD dwErr = GetLastError();

}

unsigned long

u_thread_self(void)

{

   return GetCurrentThreadId();

}

void

u_tsd_init(struct u_tsd *tsd)

{

   tsd->key = TlsAlloc();

   if (tsd->key == TLS_OUT_OF_INDEXES) {

      perror(INIT_TSD_ERROR);

      InsteadOf_exit(-1);

   }

   tsd->initMagic = INIT_MAGIC;

}

void

u_tsd_destroy(struct u_tsd *tsd)

{

   if (tsd->initMagic != INIT_MAGIC) {

      return;

   }

   TlsFree(tsd->key);

   tsd->initMagic = 0x0;

}

void *

u_tsd_get(struct u_tsd *tsd)

{

   if (tsd->initMagic != INIT_MAGIC) {

      u_tsd_init(tsd);

   }

   return TlsGetValue(tsd->key);

}

void

u_tsd_set(struct u_tsd *tsd, void *ptr)

{

   /* the following code assumes that the struct u_tsd has been initialized

      to zero at creation */

   if (tsd->initMagic != INIT_MAGIC) {

      u_tsd_init(tsd);

   }

   if (TlsSetValue(tsd->key, ptr) == 0) {

      perror(SET_TSD_ERROR);

      InsteadOf_exit(-1);

   }

}

#endif /* WIN32 */

/*

 * BeOS threads

 */

#ifdef BEOS_THREADS

unsigned long

u_thread_self(void)

{

   return (unsigned long) find_thread(NULL);

}

void

u_tsd_init(struct u_tsd *tsd)

{

   tsd->key = tls_allocate();

   tsd->initMagic = INIT_MAGIC;

}

void *

u_tsd_get(struct u_tsd *tsd)

{

   if (tsd->initMagic != (int) INIT_MAGIC) {

      u_tsd_init(tsd);

   }

   return tls_get(tsd->key);

}

void

u_tsd_set(struct u_tsd *tsd, void *ptr)

{

   if (tsd->initMagic != (int) INIT_MAGIC) {

      u_tsd_init(tsd);

   }

   tls_set(tsd->key, ptr);

}

#endif /* BEOS_THREADS */

#else  /* THREADS */

/*

 * no-op functions

 */

unsigned long

_glthread_GetID(void)

{

   return 0;

}

void

u_tsd_init(struct u_tsd *tsd)

{

   (void) tsd;

}

void *

u_tsd_get(struct u_tsd *tsd)

{

   (void) tsd;

   return NULL;

}

void

u_tsd_set(struct u_tsd *tsd, void *ptr)

{

   (void) tsd;

   (void) ptr;

}

#endif /* THREADS */