thodg/libgit2/src/win32/pthread.c

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• Hash : 16a5c304
  Author :
  Date : 2011-05-08T12:32:35
  

  Fix bug in the way pthead_mutex_t was being destroyed in win32. Win32 critical section objects (CRITICAL_SECTION) are not kernel objects. Only kernel objects are destroyed by using CloseHandle. Critical sections are supposed to be deleted with the DeleteCriticalSection API (http://msdn.microsoft.com/en-us/library/ms682552(VS.85).aspx).

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• src/win32/pthread.c

• /*
   * This file is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License, version 2,
   * as published by the Free Software Foundation.
   *
   * In addition to the permissions in the GNU General Public License,
   * the authors give you unlimited permission to link the compiled
   * version of this file into combinations with other programs,
   * and to distribute those combinations without any restriction
   * coming from the use of this file.  (The General Public License
   * restrictions do apply in other respects; for example, they cover
   * modification of the file, and distribution when not linked into
   * a combined executable.)
   *
   * This file is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; see the file COPYING.  If not, write to
   * the Free Software Foundation, 51 Franklin Street, Fifth Floor,
   * Boston, MA 02110-1301, USA.
   *
   *  Original code by Ramiro Polla (Public Domain)
   */
  
  #include "pthread.h"
  
  int pthread_create(pthread_t *GIT_RESTRICT thread,
                     const pthread_attr_t *GIT_RESTRICT GIT_UNUSED(attr),
                     void *(*start_routine)(void*), void *GIT_RESTRICT arg)
  {
  	GIT_UNUSED_ARG(attr);
  	*thread = (pthread_t) CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)start_routine, arg, 0, NULL);
  	return *thread ? GIT_SUCCESS : GIT_EOSERR;
  }
  
  int pthread_join(pthread_t thread, void **value_ptr)
  {
      int ret;
      ret = WaitForSingleObject(thread, INFINITE);
      if (ret && value_ptr)
          GetExitCodeThread(thread, (void*) value_ptr);
      return -(!!ret);
  }
  
  int pthread_mutex_init(pthread_mutex_t *GIT_RESTRICT mutex,
                         const pthread_mutexattr_t *GIT_RESTRICT GIT_UNUSED(mutexattr))
  {
      GIT_UNUSED_ARG(mutexattr);
      InitializeCriticalSection(mutex);
      return 0;
  }
  
  int pthread_mutex_destroy(pthread_mutex_t *mutex)
  {
      DeleteCriticalSection(mutex);
      return 0;
  }
  
  int pthread_mutex_lock(pthread_mutex_t *mutex)
  {
      EnterCriticalSection(mutex);
      return 0;
  }
  
  int pthread_mutex_unlock(pthread_mutex_t *mutex)
  {
      LeaveCriticalSection(mutex);
      return 0;
  }
  
  int pthread_num_processors_np(void)
  {
      DWORD_PTR p, s;
      int n = 0;
  
      if (GetProcessAffinityMask(GetCurrentProcess(), &p, &s))
          for (; p; p >>= 1)
              n += p&1;
  
      return n ? n : 1;
  }
  
  

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