Mercurial > urweb
diff src/c/urweb.c @ 1933:8e6e3d9cea22
RAND_bytes isn't thread-safe, so wrap it with a lock
| author | Adam Chlipala <adam@chlipala.net> |
|---|---|
| date | Wed, 11 Dec 2013 18:54:42 -0500 |
| parents | 98895243b5b6 |
| children | 420d129c4174 |
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--- a/src/c/urweb.c Wed Dec 11 18:22:10 2013 -0500 +++ b/src/c/urweb.c Wed Dec 11 18:54:42 2013 -0500 @@ -4023,9 +4023,13 @@ return uw_unit_v; } +static pthread_mutex_t rand_mutex = PTHREAD_MUTEX_INITIALIZER; + uw_Basis_int uw_Basis_rand(uw_context ctx) { uw_Basis_int ret; + pthread_mutex_lock(&rand_mutex); int r = RAND_bytes((unsigned char *)&ret, sizeof ret); + pthread_mutex_unlock(&rand_mutex); if (r) return abs(ret);