1 /* 2 ******************************************************************************* 3 * 4 * Copyright (C) 2008-2010, International Business Machines 5 * Corporation and others. All Rights Reserved. 6 * 7 ******************************************************************************* 8 * file name: mutex.cpp 9 * encoding: US-ASCII 10 * tab size: 8 (not used) 11 * indentation:4 12 */ 13 14 #include "unicode/utypes.h" 15 #include "mutex.h" 16 17 U_NAMESPACE_BEGIN 18 19 void *SimpleSingleton::getInstance(InstantiatorFn *instantiator, const void *context, 20 void *&duplicate, 21 UErrorCode &errorCode) { 22 duplicate=NULL; 23 if(U_FAILURE(errorCode)) { 24 return NULL; 25 } 26 void *instance; 27 UMTX_CHECK(NULL, fInstance, instance); 28 if(instance!=NULL) { 29 return instance; 30 } else { 31 instance=instantiator(context, errorCode); 32 Mutex mutex; 33 if(fInstance==NULL && U_SUCCESS(errorCode)) { 34 fInstance=instance; 35 } else { 36 duplicate=instance; 37 } 38 return fInstance; 39 } 40 } 41 42 void *TriStateSingleton::getInstance(InstantiatorFn *instantiator, const void *context, 43 void *&duplicate, 44 UErrorCode &errorCode) { 45 duplicate=NULL; 46 if(U_FAILURE(errorCode)) { 47 return NULL; 48 } 49 int8_t haveInstance; 50 UMTX_CHECK(NULL, fHaveInstance, haveInstance); 51 if(haveInstance>0) { 52 return fInstance; // instance was created 53 } else if(haveInstance<0) { 54 errorCode=fErrorCode; // instance creation failed 55 return NULL; 56 } else /* haveInstance==0 */ { 57 void *instance=instantiator(context, errorCode); 58 Mutex mutex; 59 if(fHaveInstance==0) { 60 if(U_SUCCESS(errorCode)) { 61 fInstance=instance; 62 instance=NULL; 63 fHaveInstance=1; 64 } else { 65 fErrorCode=errorCode; 66 fHaveInstance=-1; 67 } 68 } else { 69 errorCode=fErrorCode; 70 } 71 duplicate=instance; 72 return fInstance; 73 } 74 } 75 76 void TriStateSingleton::reset() { 77 fInstance=NULL; 78 fErrorCode=U_ZERO_ERROR; 79 fHaveInstance=0; 80 } 81 82 #if UCONFIG_NO_SERVICE 83 84 /* If UCONFIG_NO_SERVICE, then there is no invocation of Mutex elsewhere in 85 common, so add one here to force an export */ 86 static Mutex *aMutex = 0; 87 88 /* UCONFIG_NO_SERVICE */ 89 #endif 90 91 U_NAMESPACE_END 92
