include/Mutex.h

   1 /***************************************************************************
   2  *                                                                         *
   3  *    Copyright (C) Lakshya Solutions Ltd. All rights reserved.            *
   4  *                                                                         *
   5  ***************************************************************************/
   6
   7 #ifndef MUTEX_H
   8 #define MUTEX_H
   9 #include<os.h>
  10 typedef int Lock;
  11 class DllExport Mutex
  12 {
  13
  14     #if defined(sparc) || defined(i686) || defined (x86_64)
  15     volatile Lock lock;
  16     #else
  17     pthread_mutex_t mutex_;
  18     #endif
  19     public:
  20     char name[20];
  21     int pSlot;
  22     Mutex();
  23     int init();
  24     int init(char *name);
  25     int tryLock(int tries=0, int waitmsecs=0);
  26     int getLock(int procSlot, bool procAccount=true);
  27     int releaseLock(int procSlot, bool procAccount=true);
  28     int tryShareLock(int tries=0, int waitmsecs=0,bool share=false,bool upgrade=false);
  29     int getShareLock(int procSlot, bool procAccount=true);
  30     int getExclusiveLock(int procSlot, bool procAccount=true,bool upgrade=false);
  31     int releaseShareLock(int procSlot, bool procAccount=true);
  32     int destroy();
  33     int recoverMutex();
  34     static int CASGen(volatile void *ptr, InUse oldVal, InUse newVal);
  35     static int CASL(volatile long *ptr, long oldVal, long newVal);
  36     static int CAS(volatile int *ptr, int oldVal, int newVal);
  37     int getLockVal(){ return lock; }
  38     void print() {
  39         printf("<MUTEX name=%s lock=%d pslot=%d> </MUTEX>\n", name, lock,pSlot);
  40     }
  41 };
  42
  43 #endif