diff options
Diffstat (limited to 'platform/linux-generic/odp_rwlock.c')
| -rw-r--r-- | platform/linux-generic/odp_rwlock.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/platform/linux-generic/odp_rwlock.c b/platform/linux-generic/odp_rwlock.c index 13c17a2c7..5bef13a45 100644 --- a/platform/linux-generic/odp_rwlock.c +++ b/platform/linux-generic/odp_rwlock.c @@ -33,9 +33,14 @@ void odp_rwlock_read_lock(odp_rwlock_t *rwlock) int odp_rwlock_read_trylock(odp_rwlock_t *rwlock) { - uint32_t zero = 0; + uint32_t cnt = odp_atomic_load_u32(&rwlock->cnt); + + while (cnt != (uint32_t)-1) { + if (odp_atomic_cas_acq_u32(&rwlock->cnt, &cnt, cnt + 1)) + return 1; + } - return odp_atomic_cas_acq_u32(&rwlock->cnt, &zero, (uint32_t)1); + return 0; } void odp_rwlock_read_unlock(odp_rwlock_t *rwlock) |