diff options
Diffstat (limited to 'pcre/sljit/sljitUtils.c')
| -rw-r--r-- | pcre/sljit/sljitUtils.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/pcre/sljit/sljitUtils.c b/pcre/sljit/sljitUtils.c index 5294b5f3f9b..ec5c321194a 100644 --- a/pcre/sljit/sljitUtils.c +++ b/pcre/sljit/sljitUtils.c @@ -163,11 +163,11 @@ SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_release_lock(void) #include <fcntl.h> /* Some old systems does not have MAP_ANON. */ -static sljit_si dev_zero = -1; +static sljit_s32 dev_zero = -1; #if (defined SLJIT_SINGLE_THREADED && SLJIT_SINGLE_THREADED) -static SLJIT_INLINE sljit_si open_dev_zero(void) +static SLJIT_INLINE sljit_s32 open_dev_zero(void) { dev_zero = open("/dev/zero", O_RDWR); return dev_zero < 0; @@ -179,10 +179,13 @@ static SLJIT_INLINE sljit_si open_dev_zero(void) static pthread_mutex_t dev_zero_mutex = PTHREAD_MUTEX_INITIALIZER; -static SLJIT_INLINE sljit_si open_dev_zero(void) +static SLJIT_INLINE sljit_s32 open_dev_zero(void) { pthread_mutex_lock(&dev_zero_mutex); - dev_zero = open("/dev/zero", O_RDWR); + /* The dev_zero might be initialized by another thread during the waiting. */ + if (dev_zero < 0) { + dev_zero = open("/dev/zero", O_RDWR); + } pthread_mutex_unlock(&dev_zero_mutex); return dev_zero < 0; } |