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Diffstat (limited to 'deps/icu-small/source/common/mutex.h')
-rw-r--r-- | deps/icu-small/source/common/mutex.h | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/deps/icu-small/source/common/mutex.h b/deps/icu-small/source/common/mutex.h new file mode 100644 index 0000000000..cd2fcb16e4 --- /dev/null +++ b/deps/icu-small/source/common/mutex.h @@ -0,0 +1,77 @@ +/* +****************************************************************************** +* +* Copyright (C) 1997-2013, International Business Machines +* Corporation and others. All Rights Reserved. +* +****************************************************************************** +*/ +//---------------------------------------------------------------------------- +// File: mutex.h +// +// Lightweight C++ wrapper for umtx_ C mutex functions +// +// Author: Alan Liu 1/31/97 +// History: +// 06/04/97 helena Updated setImplementation as per feedback from 5/21 drop. +// 04/07/1999 srl refocused as a thin wrapper +// +//---------------------------------------------------------------------------- +#ifndef MUTEX_H +#define MUTEX_H + +#include "unicode/utypes.h" +#include "unicode/uobject.h" +#include "umutex.h" + +U_NAMESPACE_BEGIN + +//---------------------------------------------------------------------------- +// Code within that accesses shared static or global data should +// should instantiate a Mutex object while doing so. You should make your own +// private mutex where possible. + +// For example: +// +// UMutex myMutex; +// +// void Function(int arg1, int arg2) +// { +// static Object* foo; // Shared read-write object +// Mutex mutex(&myMutex); // or no args for the global lock +// foo->Method(); +// // When 'mutex' goes out of scope and gets destroyed here, the lock is released +// } +// +// Note: Do NOT use the form 'Mutex mutex();' as that merely forward-declares a function +// returning a Mutex. This is a common mistake which silently slips through the +// compiler!! +// + +class U_COMMON_API Mutex : public UMemory { +public: + inline Mutex(UMutex *mutex = NULL); + inline ~Mutex(); + +private: + UMutex *fMutex; + + Mutex(const Mutex &other); // forbid copying of this class + Mutex &operator=(const Mutex &other); // forbid copying of this class +}; + +inline Mutex::Mutex(UMutex *mutex) + : fMutex(mutex) +{ + umtx_lock(fMutex); +} + +inline Mutex::~Mutex() +{ + umtx_unlock(fMutex); +} + +U_NAMESPACE_END + +#endif //_MUTEX_ +//eof |