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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
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Add m-esr52 at 52.6.0
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+// Copyright (C) 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+******************************************************************************
+*
+* 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