92 lines
2.4 KiB
C++
92 lines
2.4 KiB
C++
/*
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*******************************************************************************
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*
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* Copyright (C) 2008-2010, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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*******************************************************************************
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* file name: mutex.cpp
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* encoding: US-ASCII
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* tab size: 8 (not used)
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* indentation:4
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*/
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#include "unicode/utypes.h"
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#include "mutex.h"
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U_NAMESPACE_BEGIN
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void *SimpleSingleton::getInstance(InstantiatorFn *instantiator, const void *context,
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void *&duplicate,
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UErrorCode &errorCode) {
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duplicate=NULL;
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if(U_FAILURE(errorCode)) {
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return NULL;
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}
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void *instance;
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UMTX_CHECK(NULL, fInstance, instance);
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if(instance!=NULL) {
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return instance;
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} else {
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instance=instantiator(context, errorCode);
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Mutex mutex;
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if(fInstance==NULL && U_SUCCESS(errorCode)) {
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fInstance=instance;
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} else {
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duplicate=instance;
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}
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return fInstance;
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}
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}
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void *TriStateSingleton::getInstance(InstantiatorFn *instantiator, const void *context,
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void *&duplicate,
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UErrorCode &errorCode) {
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duplicate=NULL;
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if(U_FAILURE(errorCode)) {
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return NULL;
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}
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int8_t haveInstance;
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UMTX_CHECK(NULL, fHaveInstance, haveInstance);
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if(haveInstance>0) {
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return fInstance; // instance was created
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} else if(haveInstance<0) {
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errorCode=fErrorCode; // instance creation failed
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return NULL;
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} else /* haveInstance==0 */ {
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void *instance=instantiator(context, errorCode);
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Mutex mutex;
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if(fHaveInstance==0) {
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if(U_SUCCESS(errorCode)) {
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fInstance=instance;
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instance=NULL;
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fHaveInstance=1;
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} else {
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fErrorCode=errorCode;
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fHaveInstance=-1;
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}
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} else {
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errorCode=fErrorCode;
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}
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duplicate=instance;
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return fInstance;
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}
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}
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void TriStateSingleton::reset() {
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fInstance=NULL;
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fErrorCode=U_ZERO_ERROR;
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fHaveInstance=0;
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}
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#if UCONFIG_NO_SERVICE
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/* If UCONFIG_NO_SERVICE, then there is no invocation of Mutex elsewhere in
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common, so add one here to force an export */
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static Mutex *aMutex = 0;
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/* UCONFIG_NO_SERVICE */
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#endif
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U_NAMESPACE_END
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