[svn] * Proper SVN structureinit

--HG--
branch : trunk

1 files changed, 122 insertions, 0 deletions

diff --git a/dep/src/zthread/win32/AtomicFastLock.h b/dep/src/zthread/win32/AtomicFastLock.h
new file mode 100644
index 00000000000..a714c03789f
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+++ b/dep/src/zthread/win32/AtomicFastLock.h
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+/*
+ * 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 __ZTFASTLOCK_H__
+#define __ZTFASTLOCK_H__
+
+#include "zthread/NonCopyable.h"
+#include <windows.h>
+#include <assert.h>
+
+namespace ZThread {
+
+
+/**
+ * @class FastLock
+ *
+ * @author Eric Crahen <http://www.code-foo.com>
+ * @date <2003-07-16T23:32:20-0400>
+ * @version 2.1.6
+ *
+ * This is the smallest and fastest synchronization object in the library.
+ * It is an implementation of fast mutex, an all or nothing exclusive
+ * lock. It should be used only where you need speed and are willing 
+ * to sacrifice all the state & safety checking provided by the framework
+ * for speed.
+ *
+ * The current Platform SDK defines:
+ *
+ *   LONG InterlockedExchange(LPLONG, LONG)
+ *   LONG InterlockedCompareExchange(LPLONG, LONG, LONG, LONG) 
+ *
+ * If your compiler complains about LPLONG not being implicitly casted to
+ * a PVOID, then you should get the SDK update from microsoft or use the 
+ * WIN9X implementation of this class.
+ *
+ * ----
+ * Because Windows 95 and earlier can run on processors prior to the 486, they
+ * don't all support the CMPXCHG function, and so Windows 95 an earlier dont support
+ * InterlockedCompareExchange. For this, you should use the win9x implementation
+ * of this class
+ */ 
+class FastLock : private NonCopyable {
+
+#pragma pack(push, 8)
+  LONG volatile _lock;
+#pragma pack(pop)
+  
+  public:
+  
+  /**
+   * Create a new FastLock
+   */
+  inline FastLock() : _lock(0) { }
+
+  
+  /**
+   * Destroy FastLock
+   */
+  inline ~FastLock() { assert(_lock == 0); }
+
+  /**
+   * Lock the fast Lock, no error check.
+   * 
+   * @exception None
+   */ 
+  inline void acquire() {
+
+    while (::InterlockedCompareExchange(const_cast<LPLONG>(&_lock), 1, 0) != 0)
+      ::Sleep(0);
+
+  }
+
+  
+  /**
+   * Release the fast Lock, no error check.
+   * 
+   * @exception None
+   */ 
+  inline void release() {
+
+    ::InterlockedExchange(const_cast<LPLONG>(&_lock), (LONG)0);
+
+  }
+    
+  /**
+   * Try to acquire an exclusive lock. No safety or state checks are performed.
+   * This function returns immediately regardless of the value of the timeout
+   *
+   * @param timeout Unused
+   * @return bool
+   * @exception Synchronization_Exception - not thrown
+   */
+ inline bool tryAcquire(unsigned long timeout=0) {
+ 
+   return ::InterlockedCompareExchange(const_cast<LPLONG>(&_lock), 1, 0) == 0;
+
+ }
+  
+}; /* FastLock */
+
+
+};
+#endif