posix.h

A Library of Efficient Data Types and Algorithms,封装了常用的ADT及其相关算法的软件包

/*******************************************************************************
+
+  LEDA 4.5  
+
+
+  posix.h
+
+
+  Copyright (c) 1995-2004
+  by Algorithmic Solutions Software GmbH
+  All rights reserved.
+ 
*******************************************************************************/

// $Revision: 1.3 $  $Date: 2004/02/06 11:20:29 $



// class for mutual exclusion using the posix thread library 

#define LEDA_STD_INCLUDE
#include <pthread.h>
#undef LEDA_STD_INCLUDE

#include <LEDA/std/errno.h>

LEDA_BEGIN_NAMESPACE

inline int get_thread_id() { return (int)pthread_self(); }

class leda_mutex {

  leda_mutex(const leda_mutex& m) { pthread_mutex_init (&lock_, NULL); } 

  leda_mutex operator=(const leda_mutex& m) 
  { pthread_mutex_init (&lock_, NULL); return *this; }

public:
  leda_mutex() { pthread_mutex_init (&lock_, NULL); }
 ~leda_mutex() { pthread_mutex_destroy (&lock_); }


  void acquire() { pthread_mutex_lock (&lock_); }
  void lock()    { pthread_mutex_lock (&lock_); }
  void enter()   { pthread_mutex_lock (&lock_); }

  void release() { pthread_mutex_unlock (&lock_); }
  void unlock()  { pthread_mutex_unlock (&lock_); }
  void exit()    { pthread_mutex_unlock (&lock_); }

  int trylock()  { return pthread_mutex_trylock (&lock_); }
  int tryenter() { return pthread_mutex_trylock (&lock_); }
  

private:

  pthread_mutex_t lock_;

}; 

LEDA_END_NAMESPACE