semaphore.h
1 /*************************************************************************/
2 /* semaphore.h */
3 /*************************************************************************/
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29 #ifndef SEMAPHORE_H
30 #define SEMAPHORE_H
31 
32 #include "error_list.h"
33 
37 class Semaphore {
38 protected:
39  static Semaphore* (*create_func)();
40 
41 public:
42 
43  virtual Error wait()=0;
44  virtual Error post()=0;
45  virtual int get() const=0;
46 
47  static Semaphore * create();
48 
49  virtual ~Semaphore();
50 };
51 
52 
53 #endif
virtual Error post()=0
unlock the semaphore, incrementing the value
static Semaphore * create()
Create a mutex.
Definition: semaphore.cpp:34
virtual Error wait()=0
wait until semaphore has positive value, then decrement and pass
Definition: semaphore.h:37