1/* 2****************************************************************************** 3* 4* Copyright (C) 1997-2013, International Business Machines 5* Corporation and others. All Rights Reserved. 6* 7****************************************************************************** 8*/ 9//---------------------------------------------------------------------------- 10// File: mutex.h 11// 12// Lightweight C++ wrapper for umtx_ C mutex functions 13// 14// Author: Alan Liu 1/31/97 15// History: 16// 06/04/97 helena Updated setImplementation as per feedback from 5/21 drop. 17// 04/07/1999 srl refocused as a thin wrapper 18// 19//---------------------------------------------------------------------------- 20#ifndef MUTEX_H 21#define MUTEX_H 22 23#include "unicode/utypes.h" 24#include "unicode/uobject.h" 25#include "umutex.h" 26 27U_NAMESPACE_BEGIN 28 29//---------------------------------------------------------------------------- 30// Code within that accesses shared static or global data should 31// should instantiate a Mutex object while doing so. You should make your own 32// private mutex where possible. 33 34// For example: 35// 36// UMutex myMutex; 37// 38// void Function(int arg1, int arg2) 39// { 40// static Object* foo; // Shared read-write object 41// Mutex mutex(&myMutex); // or no args for the global lock 42// foo->Method(); 43// // When 'mutex' goes out of scope and gets destroyed here, the lock is released 44// } 45// 46// Note: Do NOT use the form 'Mutex mutex();' as that merely forward-declares a function 47// returning a Mutex. This is a common mistake which silently slips through the 48// compiler!! 49// 50 51class U_COMMON_API Mutex : public UMemory { 52public: 53 inline Mutex(UMutex *mutex = NULL); 54 inline ~Mutex(); 55 56private: 57 UMutex *fMutex; 58 59 Mutex(const Mutex &other); // forbid copying of this class 60 Mutex &operator=(const Mutex &other); // forbid copying of this class 61}; 62 63inline Mutex::Mutex(UMutex *mutex) 64 : fMutex(mutex) 65{ 66 umtx_lock(fMutex); 67} 68 69inline Mutex::~Mutex() 70{ 71 umtx_unlock(fMutex); 72} 73 74U_NAMESPACE_END 75 76#endif //_MUTEX_ 77//eof 78