IABSD.fr/xenocara/xserver/glx/glthread.c

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• Author : matthieu
  Date : 2012-06-10 13:21:05
  Hash : e60da745
  Message : Update to xserver 1.12.2. tested by naddy@, krw@, mpi@.

• xserver/glx/glthread.c

• /*
   * 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 */