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author | Neo2003 <none@none> | 2008-10-02 16:23:55 -0500 |
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committer | Neo2003 <none@none> | 2008-10-02 16:23:55 -0500 |
commit | 9b1c0e006f20091f28f3f468cfcab1feb51286bd (patch) | |
tree | b5d1ba94a656e6679f8737f9ea6bed1239b73b14 /dep/include/zthread/Waitable.h |
[svn] * Proper SVN structureinit
--HG--
branch : trunk
Diffstat (limited to 'dep/include/zthread/Waitable.h')
-rw-r--r-- | dep/include/zthread/Waitable.h | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/dep/include/zthread/Waitable.h b/dep/include/zthread/Waitable.h new file mode 100644 index 00000000000..3d925f2a691 --- /dev/null +++ b/dep/include/zthread/Waitable.h @@ -0,0 +1,94 @@ +/* + * 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 __ZTWAITABLE_H__ +#define __ZTWAITABLE_H__ + +#include "zthread/Exceptions.h" + +namespace ZThread { + + /** + * @class Waitable + * + * @author Eric Crahen <http://www.code-foo.com> + * @date <2003-07-16T22:16:41-0400> + * @version 2.3.0 + * + * The Waitable interface defines a common method of adding generic <i>wait</i> semantics + * to a class. + * + * <b>Waiting</b> + * + * An object implementing the Waitable interface externalizes a mechanism for testing + * some internal condition. Another object may <i>wait()</i>s for a Waitable object; + * in doing so, it wait()s for that condition to become true by blocking the caller + * while the condition is false. + * + * For example, a Condition is Waitable object that extends <i>wait</i> semantics + * so that wait()ing means a thread is blocked until some external stimulus + * specifically performs an operation on the Condition to make its internal condition true. + * (serialization aside) + * + * A Barrier extends <i>wait</i> semantics so that wait()ing mean waiting for other + * waiters, and may include automatically resetting the condition once a wait is complete. + * + * @see Condition + * @see Barrier + * @see Executor + */ + class Waitable { + public: + + //! Destroy a Waitable object. + virtual ~Waitable() {} + + /** + * Waiting on an object will generally cause the calling thread to be blocked + * for some indefinite period of time. The thread executing will not proceed + * any further until the Waitable object releases it unless or an exception + * is thrown. + */ + virtual void wait() = 0; + + /** + * Waiting on an object will generally cause the calling thread to be blocked + * for some indefinite period of time. The thread executing will not proceed + * any further until the Waitable object releases it unless or an exception + * is thrown. + * + * @param timeout maximum amount of time, in milliseconds, to spend waiting. + * + * @return + * - <em>true</em> if the set of tasks being wait for complete before + * <i>timeout</i> milliseconds elapse. + * - <em>false</em> othewise. + */ + virtual bool wait(unsigned long timeout) = 0; + + + }; /* Waitable */ + + +} // namespace ZThread + +#endif // __ZTWAITABLE_H__ |