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Fixed deadlock in CRYPTO_THREAD_run_once for Windows

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Fixed deadlock in CRYPTO_THREAD_run_once() if call to init() is causing
a recursive call to CRYPTO_THREAD_run_once() again that is causing a hot
deadloop inside do { } while (result == ONCE_ININIT); section.

CLA: trivial
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1913)
This commit is contained in:
DK 2016-11-13 14:48:15 +02:00 committed by Rich Salz
parent af5883fec9
commit 349d1cfddc
1 changed files with 1 additions and 1 deletions
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2
crypto/threads_win.c
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@ -78,8 +78,8 @@ int CRYPTO_THREAD_run_once(CRYPTO_ONCE *once, void (*init)(void))
do {
result = InterlockedCompareExchange(lock, ONCE_ININIT, ONCE_UNINITED);
if (result == ONCE_UNINITED) {
init();
*lock = ONCE_DONE;
init();
return 1;
}
} while (result == ONCE_ININIT);