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PsnSequentialSemaphore Class Reference

PsnSequentialSemaphore class. More...

#include <PsnSequentialSemaphore.h>

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List of all members.

Public Methods

 PsnSequentialSemaphore (const int valeurInitiale)
 Constructor.

virtual ~PsnSequentialSemaphore ()
 Destructor.

virtual int V ()
 V Increments the semphore value and signals the change to blocked threads.

virtual int P ()
 P decrement the sempaphore value and block the calling thread if this value is negative.


Private Attributes

int v
 the value associated to the semaphore

Detailed Description

PsnSequentialSemaphore class.

generic semaphore when only one thread is supposed to exist

Author:
D. Margery
Version:
1.1

Definition at line 28 of file PsnSequentialSemaphore.h.

Constructor & Destructor Documentation

PsnSequentialSemaphore::PsnSequentialSemaphore (  const int    valeurInitiale ) 
 

Constructor.

Parameters:
int initial value of the semaphore

Definition at line 21 of file PsnSequentialSemaphore.cxx.

References v. 

00021                                                                         : PsnSemaphore(valeurInitiale){
00022   v=valeurInitiale;
00023 }

PsnSequentialSemaphore::~PsnSequentialSemaphore (    )  [virtual]
 

Destructor.

Definition at line 25 of file PsnSequentialSemaphore.cxx. 

00025                                                 {
00026 }

Member Function Documentation

int PsnSequentialSemaphore::P (    )  [virtual]
 

P decrement the sempaphore value and block the calling thread if this value is negative.

Returns:
: old value of the semaphore

Implements PsnSemaphore.

Definition at line 33 of file PsnSequentialSemaphore.cxx.

References PsController::error(), and v. 

00033                               {
00034   v--;
00035   if (v<0) {
00036     PsController::error("PsnSequentialSemaphore : P : interblocage");
00037   }
00038   return (v+1);
00039 }

int PsnSequentialSemaphore::V (    )  [virtual]
 

V Increments the semphore value and signals the change to blocked threads.

Returns:
: new value of the semaphore

Implements PsnSemaphore.

Definition at line 28 of file PsnSequentialSemaphore.cxx.

References v. 

00028                               {
00029   v++;
00030   return v;
00031 }

Member Data Documentation

int PsnSequentialSemaphore::v [private]
 

the value associated to the semaphore

Definition at line 57 of file PsnSequentialSemaphore.h.

Referenced by P(), PsnSequentialSemaphore(), and V().

The documentation for this class was generated from the following files:
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Documentation generated on Mon Nov 25 15:26:28 2002

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