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Return the actual success result from __futex.

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futex(2) can return non-zero successes.

Bug: 15195455
Change-Id: I7818bc922a5a2df31228ff72c169320b5e69a544
This commit is contained in:
Elliott Hughes 2014-05-29 10:27:55 -07:00
parent ef023873e2
commit 1ee46520ca
1 changed files with 4 additions and 4 deletions
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8
libc/private/bionic_futex.h
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@ -42,12 +42,12 @@ struct timespec;
static inline __always_inline int __futex(volatile void* ftx, int op, int value, const struct timespec* timeout) { static inline __always_inline int __futex(volatile void* ftx, int op, int value, const struct timespec* timeout) {
// Our generated syscall assembler sets errno, but our callers (pthread functions) don't want to. // Our generated syscall assembler sets errno, but our callers (pthread functions) don't want to.
int saved_errno = errno; int saved_errno = errno;
if (__predict_false(syscall(__NR_futex, ftx, op, value, timeout) == -1)) { int result = syscall(__NR_futex, ftx, op, value, timeout);
int result = -errno; if (__predict_false(result == -1)) {
result = -errno;
errno = saved_errno; errno = saved_errno;
return result;
} }
return 0; return result;
} }
static inline int __futex_wake(volatile void* ftx, int count) { static inline int __futex_wake(volatile void* ftx, int count) {