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ICU-165 mutex getAvailableNames()

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X-SVN-Rev: 334
This commit is contained in:
Markus Scherer 1999-12-07 19:06:51 +00:00
parent 590d75d8ee
commit f82c8d906f
1 changed files with 23 additions and 5 deletions
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28
icu4c/source/common/convert.cpp
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@ -398,12 +398,30 @@ void UnicodeConverterCPP::getStarters(bool_t starters[256],
const char* const*
UnicodeConverterCPP::getAvailableNames(int32_t& num, UErrorCode& err)
{
if(U_FAILURE(err)) {
num = 0;
return NULL;
}
if (availableConverterNames==NULL) {
availableConverterNamesCount = ucnv_io_countAvailableAliases(&err);
if (availableConverterNamesCount > 0) {
availableConverterNames = new const char *[availableConverterNamesCount];
if (availableConverterNames != NULL) {
ucnv_io_fillAvailableAliases(availableConverterNames, &err);
int32_t count = ucnv_io_countAvailableAliases(&err);
if (count > 0) {
const char **names = new const char *[count];
if (names != NULL) {
ucnv_io_fillAvailableAliases(names, &err);
/* in the mutex block, set the data for this process */
umtx_lock(0);
if (availableConverterNames == NULL) {
availableConverterNamesCount = count;
availableConverterNames = names;
names = 0;
}
umtx_unlock(0);
/* if a different thread set it first, then delete the extra data */
if (names != 0) {
delete [] names;
}
} else {
num = 0;
err = U_MEMORY_ALLOCATION_ERROR;