OW_NonRecursiveMutexImpl.cpp

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#include "OW_config.h"
#include "OW_NonRecursiveMutexImpl.hpp"
#include <cerrno>
#include <cassert>

namespace OW_NAMESPACE
{

namespace NonRecursiveMutexImpl
{

int
createMutex(NonRecursiveMutex_t& handle)
{
#if defined(OW_USE_PTHREAD)
   pthread_mutexattr_t attr;
   int res = pthread_mutexattr_init(&attr);
   assert(res == 0);
   if (res != 0)
   {
      return -1;
   }
 
   res = pthread_mutex_init(&handle.mutex, &attr);
   pthread_mutexattr_destroy(&attr);
   if (res != 0)
   {
      return -1;
   }
 
   return 0;
#elif defined(OW_WIN32)
   int cc = -1;
   if ((handle = CreateMutex(NULL, FALSE, NULL)))
   {
      cc = 0;
   }
   return cc;
#else
#error "port me!"
#endif
}
int
destroyMutex(NonRecursiveMutex_t& handle)
{
#if defined(OW_USE_PTHREAD)
   switch (pthread_mutex_destroy(&handle.mutex))
   {
      case 0:
         break;
      case EBUSY:
         return -1;
         break;
      default:
         return -2;
   }
   return 0;
#elif defined (OW_WIN32)
   ReleaseMutex(handle);
   return (CloseHandle(handle) == 0) ? -2 : 0;
#else
#error "port me!"
#endif
}
int
acquireMutex(NonRecursiveMutex_t& handle)
{
#if defined (OW_USE_PTHREAD)
   int res = pthread_mutex_lock(&handle.mutex);
   assert(res == 0);
   return res;
#elif defined (OW_WIN32)
   int cc = -1;
   if (WaitForSingleObject(handle, INFINITE) != WAIT_FAILED)
   {
      cc = 0;
   }
   return cc;
#else
#error "port me!"
#endif
}
int
releaseMutex(NonRecursiveMutex_t& handle)
{
#if defined (OW_USE_PTHREAD)
   int res = pthread_mutex_unlock(&handle.mutex);
   assert(res == 0);
   return res;
 
#elif defined (OW_WIN32)
   return (ReleaseMutex(handle)) ? 0 : -1;
#else
#error "port me!"
#endif
}

int
conditionPreWait(NonRecursiveMutex_t& handle, NonRecursiveMutexLockState& state)
{
#if defined (OW_WIN32)
   state.pmutex = &handle;
#else
   state.pmutex = &handle.mutex;
#endif
   return 0;
}
int
conditionPostWait(NonRecursiveMutex_t& handle, NonRecursiveMutexLockState& state)
{
   return 0;
}

} // end namespace NonRecursiveMutexImpl
} // end namespace OW_NAMESPACE

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