organicmaps/icu
13
Fork 0
mirror of https://github.com/unicode-org/icu.git synced 2025-04-08 06:53:45 +00:00
Code Issues 1 Projects Releases Wiki Activity Actions 2

ICU-20689 Fix race condition in UMutex code, leading to random crashes.

Browse source
This commit is contained in:
Jeff Genovy 2019-07-03 14:04:36 -07:00
parent d56f291178
commit 2cd213ac3b
1 changed files with 2 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
icu4c/source/common/umutex.cpp
View file

@ -90,7 +90,8 @@ std::mutex *UMutex::getMutex() {
if (retPtr == nullptr) {
std::call_once(*pInitFlag, umtx_init);
std::lock_guard<std::mutex> guard(*initMutex);
if (fMutex.load() == nullptr) {
retPtr = fMutex.load(std::memory_order_acquire);
if (retPtr == nullptr) {
fMutex = new(fStorage) std::mutex();
retPtr = fMutex;
fListLink = gListHead;