Imported MaNGOS revision 6767 from http://mangos.svn.sourceforge.net/svnroot/mangos/trunk/

dep/include/zthread/PrioritySemaphore.h

@@ -0,0 +1,111 @@
+/*
+ * Copyright (c) 2005, Eric Crahen
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is furnished
+ * to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+
+#ifndef __ZTPRIORITYSEMAPHORE_H__
+#define __ZTPRIORITYSEMAPHORE_H__
+
+#include "zthread/Lockable.h"
+#include "zthread/NonCopyable.h"
+
+namespace ZThread {
+  
+  class PrioritySemaphoreImpl;
+ 
+  /**
+   * @class PrioritySemaphore
+   * @author Eric Crahen <http://www.code-foo.com>
+   * @date <2003-07-16T15:36:07-0400>
+   * @version 2.2.1
+   *
+   * A PrioritySemaphore operates in the same way as a Semaphore. Its an owner-less 
+   * Lockable object that is sensitive to priority.
+   *
+   * <b>Scheduling</b>
+   *
+   * Threads blocked on a PrioritySemaphore are resumed in priority order, highest
+   * priority first.
+   *
+   * <b>Error Checking</b>
+   *
+   * An attempt to increase a PrioritySemaphore beyond its maximum value will result in 
+   * an InvalidOp_Exception.
+   *
+   * @see Semaphore
+   */
+  class ZTHREAD_API PrioritySemaphore : public Lockable, private NonCopyable {
+  
+    PrioritySemaphoreImpl* _impl;
+  
+  public:
+  
+    /**
+     * @see Semaphore::Semaphore(int count, unsigned int maxCount)
+     */
+    PrioritySemaphore(int count = 1, unsigned int maxCount = 1);
+
+    /**
+     * @see Semaphore::~Semaphore()
+     */
+    virtual ~PrioritySemaphore();
+
+    /**
+     * @see Semaphore::wait()
+     */ 
+    void wait();
+
+    /**
+     * @see Semaphore::tryWait(unsigned long)
+     */ 
+    bool tryWait(unsigned long);
+
+    /**
+     * @see Semaphore::post()
+     */
+    void post();
+  
+    /**
+     * @see Semaphore::count()
+     */
+    virtual int count();
+
+    /**
+     * @see Semaphore::tryAcquire(unsigned long timeout)
+     */
+    virtual bool tryAcquire(unsigned long timeout);
+
+    /**
+     * @see Semaphore::acquire()
+     */
+    virtual void acquire();
+
+    /**
+     * @see Semaphore::release()
+     */
+    virtual void release();
+      
+  }; 
+
+
+} // namespace ZThread
+
+#endif // __ZTPRIORITYSEMAPHORE_H__