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ICU-2787 add comment about double-checked locking

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X-SVN-Rev: 11822
This commit is contained in:
Markus Scherer 2003-05-06 23:56:34 +00:00
parent e55480b50b
commit 2d1f3e63a9
1 changed files with 6 additions and 0 deletions
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6
icu4c/source/common/uchar.c
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@ -115,6 +115,12 @@ uchar_cleanup()
static int8_t
loadPropsData(void) {
/* load Unicode character properties data from file if necessary */
/*
* This lazy intialization with double-checked locking (without mutex protection for
* haveNormData==0) is transiently unsafe under certain circumstances.
* Check the readme and use u_init() if necessary.
*/
if(havePropsData==0) {
UTrie trie={ 0 }, trie2={ 0 };
UErrorCode errorCode=U_ZERO_ERROR;