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ICU-2787 revise double-check code to improve thread safety

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X-SVN-Rev: 11785
This commit is contained in:
Alan Liu 2003-05-02 21:52:53 +00:00
parent b236d896f6
commit f4d9e46ab0
1 changed files with 41 additions and 35 deletions
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76
icu4c/source/common/uniset.cpp
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@ -2981,25 +2981,24 @@ UnicodeSet& UnicodeSet::applyPropertyPattern(const UnicodeString& pattern,
//----------------------------------------------------------------
const UnicodeSet* UnicodeSet::getInclusions(UErrorCode &status) {
if (INCLUSIONS == NULL) {
UnicodeSet *incl = new UnicodeSet();
if(incl == NULL) {
umtx_lock(NULL);
UBool f = (INCLUSIONS == NULL);
umtx_unlock(NULL);
if (f) {
UnicodeSet* incl = new UnicodeSet();
if (incl != NULL) {
uprv_getInclusions((USet*)incl, &status);
if (U_SUCCESS(status)) {
umtx_lock(NULL);
if (INCLUSIONS == NULL) {
INCLUSIONS = incl;
incl = NULL;
}
umtx_unlock(NULL);
}
delete incl;
} else {
status = U_MEMORY_ALLOCATION_ERROR;
return NULL;
}
uprv_getInclusions((USet *)incl, &status);
if(U_FAILURE(status)) {
delete incl;
return NULL;
}
umtx_lock(NULL);
if (INCLUSIONS == NULL) {
INCLUSIONS = incl;
incl = NULL;
}
umtx_unlock(NULL);
if(incl != NULL) {
delete incl;
}
}
return INCLUSIONS;
@ -3493,30 +3492,34 @@ void UnicodeSet::caseCloseOne(const CaseEquivClass& c) {
* CaseEquivClass containing this string, or NULL if none.
*/
const CaseEquivClass* UnicodeSet::getCaseMapOf(const UnicodeString& folded) {
umtx_lock(NULL);
UBool f = (CASE_EQUIV_HASH == NULL);
umtx_unlock(NULL);
if (CASE_EQUIV_HASH == NULL) {
if (f) {
// Create the Hashtable, which maps UnicodeStrings to index
// values into CASE_NONPAIRS.
UErrorCode ec = U_ZERO_ERROR;
Hashtable* hash = new Hashtable();
int32_t i;
for (i=0; i<(int32_t)CASE_NONPAIRS_LENGTH; ++i) {
const CaseEquivClass* c = &CASE_NONPAIRS[i];
const UChar* p;
for (c->getStrings(p); *p; c->nextString(p)) {
hash->put(UnicodeString(p), (void*) c, ec);
if (hash != NULL) {
int32_t i;
for (i=0; i<(int32_t)CASE_NONPAIRS_LENGTH; ++i) {
const CaseEquivClass* c = &CASE_NONPAIRS[i];
const UChar* p;
for (c->getStrings(p); *p; c->nextString(p)) {
hash->put(UnicodeString(p), (void*) c, ec);
}
}
}
if (U_SUCCESS(ec)) {
umtx_lock(NULL);
if (CASE_EQUIV_HASH == NULL) {
CASE_EQUIV_HASH = hash;
hash = NULL;
if (U_SUCCESS(ec)) {
umtx_lock(NULL);
if (CASE_EQUIV_HASH == NULL) {
CASE_EQUIV_HASH = hash;
hash = NULL;
}
umtx_unlock(NULL);
}
umtx_unlock(NULL);
delete hash;
}
delete hash;
}
return (CASE_EQUIV_HASH != NULL) ?
@ -3528,8 +3531,11 @@ const CaseEquivClass* UnicodeSet::getCaseMapOf(const UnicodeString& folded) {
* or NULL if none.
*/
const CaseEquivClass* UnicodeSet::getCaseMapOf(UChar folded) {
umtx_lock(NULL);
UBool f = (CASE_EQUIV_CBA == NULL);
umtx_unlock(NULL);
if (CASE_EQUIV_CBA == NULL) {
if (f) {
// Create the CompactByteArray, which maps single code units
// to index values into CASE_NONPAIRS.
CompactByteArray* cba = ucmp8_open(-1);