diff options
Diffstat (limited to 'dep/include/zthread/GuardedClass.h')
-rw-r--r-- | dep/include/zthread/GuardedClass.h | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/dep/include/zthread/GuardedClass.h b/dep/include/zthread/GuardedClass.h new file mode 100644 index 00000000000..4ef3879cb08 --- /dev/null +++ b/dep/include/zthread/GuardedClass.h @@ -0,0 +1,103 @@ +/* + * 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 __GUARDEDCLASS_H__ +#define __GUARDEDCLASS_H__ + +#include "zthread/Guard.h" +#include "zthread/Mutex.h" + +namespace ZThread { + + /** + * @class GuardedClass + * @author Eric Crahen <http://www.code-foo.com> + * @date <2003-07-20T20:17:34-0400> + * @version 2.3.0 + * + * A simple wrapper template that uses Guard's to provide + * serialized access to an objects member functions. + */ + template <class T, class LockType = Mutex> + class GuardedClass { + + LockType _lock; + T* _ptr; + + class TransferedScope { + public: + + template <class LockType1, class LockType2> + static void shareScope(LockHolder<LockType1>& l1, + LockHolder<LockType2>& l2) { + l1.disable(); + l2.getLock().acquire(); + } + + template <class LockType1> + static void createScope(LockHolder<LockType1>& l) { + // Don't acquire the lock when scope the Guard is created + } + + template <class LockType1> + static void destroyScope(LockHolder<LockType1>& l) { + l.getLock().release(); + } + + }; + + class Proxy : Guard<LockType, TransferedScope> { + + T* _object; + + public: + + Proxy(LockType& lock, T* object) : + Guard<LockType, TransferedScope>(lock), _object(object) { } + + T* operator->() { + return _object; + } + + }; + + GuardedClass(); + GuardedClass& operator=(const GuardedClass&); + + public: + + GuardedClass(T* ptr) : _ptr(ptr) {} + ~GuardedClass() { + if(_ptr) + delete _ptr; + } + + Proxy operator->() { + Proxy p(_lock, _ptr); + return p; + } + + }; + +} // namespace ZThread + +#endif // __ZTGUARDEDCLASS_H__ |