Using QSemaphore

  

Foundations of Qt Development\Chapter12\basicsemaphore\main.cpp
/*
 * Copyright (c) 2006-2007, Johan Thelin
 * 
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without modification, 
 * are permitted provided that the following conditions are met:
 * 
 *     * Redistributions of source code must retain the above copyright notice, 
 *       this list of conditions and the following disclaimer.
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 *       this list of conditions and the following disclaimer in the documentation 
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 *       may be used to endorse or promote products derived from this software 
 *       without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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#include <QSemaphore>

int main( int argc, char *argv )
{
  QSemaphore s( 10 );
  
  s.acquire();      // s.available() = 9
  s.acquire(5);     // s.available() = 4 
  s.release(2);     // s.available() = 6
  s.release();      // s.available() = 7
  s.release(5);     // s.available() = 12
  s.tryAcquire(15); // s.available() = 12

  return 0;
}
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1.	Producer and consumer and QSemaphore
2.	QSemaphore demo
Using QSemaphore : QSemaphore « Qt « C++

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