android/JackAndroidSemaphore.h

   1 /*
   2 Copyright (C) 2004-2008 Grame
   3 Copyright (C) 2013 Samsung Electronics
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18
  19 */
  20
  21 #ifndef __JackAndroidSemaphore__
  22 #define __JackAndroidSemaphore__
  23
  24 #include "JackSynchro.h"
  25 #include "JackCompilerDeps.h"
  26 #include <semaphore.h>
  27 #include <time.h>
  28 #include <assert.h>
  29
  30 #include <binder/IMemory.h>
  31 #include <binder/MemoryHeapBase.h>
  32 #include <utils/RefBase.h>
  33
  34 namespace Jack
  35 {
  36
  37 /*!
  38 \brief Inter process synchronization using POSIX semaphore.
  39 */
  40
  41 class SERVER_EXPORT JackAndroidSemaphore : public detail::JackSynchro
  42 {
  43
  44     private:
  45
  46         sem_t* fSemaphore;
  47         android::sp<android::IMemoryHeap> fSemaphoreMemory;
  48         static pthread_mutex_t mutex;
  49
  50     protected:
  51
  52         void BuildName(const char* name, const char* server_name, char* res, int size);
  53
  54     public:
  55
  56         JackAndroidSemaphore():JackSynchro(), fSemaphore(NULL)
  57         {}
  58
  59         bool Signal();
  60         bool SignalAll();
  61         bool Wait();
  62         bool TimedWait(long usec);
  63
  64         bool Allocate(const char* name, const char* server_name, int value);
  65         bool Connect(const char* name, const char* server_name);
  66         bool ConnectInput(const char* name, const char* server_name);
  67         bool ConnectOutput(const char* name, const char* server_name);
  68         bool Disconnect();
  69         void Destroy();
  70 };
  71
  72 } // end of namespace
  73
  74
  75 #endif
  76