source/core/mutex.cpp

   1 #ifndef WIN32
   2 #include <cerrno>
   3 #endif
   4 #include "mutex.h"
   5 #include "mutex_private.h"
   6 #include "systemerror.h"
   7
   8 namespace Msp {
   9
  10 Mutex::Mutex():
  11         priv(new Private)
  12 {
  13 #ifdef WIN32
  14         InitializeCriticalSection(&priv->crit);
  15 #else
  16         pthread_mutex_init(&priv->mutex, 0);
  17 #endif
  18 }
  19
  20 Mutex::~Mutex()
  21 {
  22 #ifdef WIN32
  23         DeleteCriticalSection(&priv->crit);
  24 #else
  25         pthread_mutex_destroy(&priv->mutex);
  26 #endif
  27         delete priv;
  28 }
  29
  30 void Mutex::lock()
  31 {
  32 #ifdef WIN32
  33         EnterCriticalSection(&priv->crit);
  34 #else
  35         if(int err = pthread_mutex_lock(&priv->mutex))
  36                 throw system_error("pthread_mutex_lock", err);
  37 #endif
  38 }
  39
  40 bool Mutex::trylock()
  41 {
  42 #ifdef WIN32
  43         return TryEnterCriticalSection(&priv->crit);
  44 #else
  45         int err = pthread_mutex_trylock(&priv->mutex);
  46         if(err && err!=EBUSY)
  47                 throw system_error("pthread_mutex_trylock", err);
  48         return !err;
  49 #endif
  50 }
  51
  52 void Mutex::unlock()
  53 {
  54 #ifdef WIN32
  55         LeaveCriticalSection(&priv->crit);
  56 #else
  57         if(int err = pthread_mutex_unlock(&priv->mutex))
  58                 throw system_error("pthread_mutex_unlock", err);
  59 #endif
  60 }
  61
  62 } // namespace Msp