mono/utils/mono-semaphore.h

   1 /*
   2  * mono-semaphore.h:  Definitions for generic semaphore usage
   3  *
   4  * Author:
   5  *      Geoff Norton  <gnorton@novell.com>
   6  *
   7  * (C) 2009 Novell, Inc.
   8  */
   9
  10 #ifndef _MONO_SEMAPHORE_H_
  11 #define _MONO_SEMAPHORE_H_
  12
  13 #include <config.h>
  14 #include <glib.h>
  15 #include <time.h>
  16 #if defined(HAVE_SEMAPHORE_H) && !defined(HOST_WIN32)
  17 #include <semaphore.h>
  18 #endif
  19 #include <mono/io-layer/io-layer.h>
  20
  21 #if (defined (HAVE_SEMAPHORE_H) || defined (USE_MACH_SEMA)) && !defined(HOST_WIN32)
  22 #  define MONO_HAS_SEMAPHORES
  23
  24 #  if defined (USE_MACH_SEMA)
  25 #    include <mach/mach_init.h>
  26 #    include <mach/task.h>
  27 #    include <mach/semaphore.h>
  28 typedef semaphore_t MonoSemType;
  29 #    define MONO_SEM_INIT(addr,value) semaphore_create (current_task (), (addr), SYNC_POLICY_FIFO, (value))
  30 #    define MONO_SEM_DESTROY(sem) semaphore_destroy (current_task (), *(sem))
  31 #  else
  32 typedef sem_t MonoSemType;
  33 #    define MONO_SEM_INIT(addr,value) sem_init ((addr), 0, (value))
  34 #    define MONO_SEM_DESTROY(sem) sem_destroy ((sem))
  35 #  endif
  36 #else
  37 #  define MONO_HAS_SEMAPHORES
  38 typedef HANDLE MonoSemType;
  39 #    define MONO_SEM_INIT(addr,initial) do {*(addr) = CreateSemaphore ( NULL,(initial),0x7FFFFFFF,NULL);} while(0)
  40 #    define MONO_SEM_DESTROY(sem) CloseHandle (*(sem))
  41 #endif
  42
  43 #define MONO_SEM_WAIT(sem) MONO_SEM_WAIT_ALERTABLE(sem, FALSE)
  44 #define MONO_SEM_WAIT_ALERTABLE(sem,alertable) mono_sem_wait ((sem), alertable)
  45 #define MONO_SEM_POST(sem) mono_sem_post ((sem))
  46 #define MONO_SEM_TIMEDWAIT(sem, timeout_ms) MONO_SEM_TIMEDWAIT_ALERTABLE(sem, timeout_ms, FALSE)
  47 #define MONO_SEM_TIMEDWAIT_ALERTABLE(sem, timeout_ms, alertable) mono_sem_timedwait ((sem), (timeout_ms), alertable)
  48
  49 G_BEGIN_DECLS
  50
  51 int mono_sem_wait (MonoSemType *sem, gboolean alertable);
  52 int mono_sem_timedwait (MonoSemType *sem, guint32 timeout_ms, gboolean alertable);
  53 int mono_sem_post (MonoSemType *sem);
  54
  55 G_END_DECLS
  56 #endif /* _MONO_SEMAPHORE_H_ */