rosapps/smartpdf/poppler/goo/GooMutex.h

   1 //========================================================================
   2 //
   3 // GooMutex.h
   4 //
   5 // Portable mutex macros.
   6 //
   7 // Copyright 2002-2003 Glyph & Cog, LLC
   8 //
   9 //========================================================================
  10
  11 #ifndef GMUTEX_H
  12 #define GMUTEX_H
  13
  14 // Usage:
  15 //
  16 // GooMutex m;
  17 // gInitMutex(&m);
  18 // ...
  19 // gLockMutex(&m);
  20 //   ... critical section ...
  21 // gUnlockMutex(&m);
  22 // ...
  23 // gDestroyMutex(&m);
  24
  25 #ifdef WIN32
  26
  27 #include <windows.h>
  28
  29 typedef CRITICAL_SECTION GooMutex;
  30
  31 #define gInitMutex(m) InitializeCriticalSection(m)
  32 #define gInitMutexReentrant(m) InitializeCriticalSection(m)
  33 #define gDestroyMutex(m) DeleteCriticalSection(m)
  34 #define gLockMutex(m) EnterCriticalSection(m)
  35 #define gUnlockMutex(m) LeaveCriticalSection(m)
  36
  37 #else // assume pthreads
  38
  39 #include <pthread.h>
  40
  41 typedef pthread_mutex_t GooMutex;
  42
  43 #define gInitMutex(m) pthread_mutex_init(m, NULL)
  44 #define gDestroyMutex(m) pthread_mutex_destroy(m)
  45 #define gLockMutex(m) pthread_mutex_lock(m)
  46 #define gUnlockMutex(m) pthread_mutex_unlock(m)
  47
  48 #define gInitMutexReentrant(m) \
  49   { \
  50   pthread_mutexattr_t attr;  \
  51   pthread_mutexattr_init(&attr); \
  52   pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE_NP); \
  53   pthread_mutex_init(mutex, &attr); \
  54   }
  55 #endif
  56
  57 class MutexAutoInitDestroy {
  58 public:
  59     MutexAutoInitDestroy(GooMutex *mutex) {
  60         mMutex = mutex;
  61         gInitMutexReentrant(mMutex);
  62     }
  63     ~MutexAutoInitDestroy() {
  64         gDestroyMutex(mMutex);
  65     }
  66 private:
  67     GooMutex *mMutex;
  68 };
  69
  70 #endif