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| author | Jakub Jelinek <jakub@redhat.com> | 2021-01-18 07:18:46 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2021-01-18 07:18:46 +0100 |
| commit | d3b41bde961713ff4af7e18011126434c497edba (patch) | |
| tree | 72a909a9aa158d38893c15a79b86ac0649849b27 /libgomp/config/linux | |
| parent | 994fb69ac1b7d52348e84a021c07b24e285294d0 (diff) | |
| download | gcc-d3b41bde961713ff4af7e18011126434c497edba.zip gcc-d3b41bde961713ff4af7e18011126434c497edba.tar.gz gcc-d3b41bde961713ff4af7e18011126434c497edba.tar.bz2 | |
libgomp: Don't access gomp_sem_t as int using atomics unconditionally
This patch introduces gomp_sem_getcount wrapper, which uses sem_getvalue
for POSIX and atomic loads for linux futex and accel. rtems for now
remains broken.
2021-01-18 Jakub Jelinek <jakub@redhat.com>
* config/linux/sem.h (gomp_sem_getcount): New function.
* config/posix/sem.h (gomp_sem_getcount): New function.
* config/posix/sem.c (gomp_sem_getcount): New function.
* config/accel/sem.h (gomp_sem_getcount): New function.
* task.c (task_fulfilled_p): Use gomp_sem_getcount.
(omp_fulfill_event): Likewise.
Diffstat (limited to 'libgomp/config/linux')
| -rw-r--r-- | libgomp/config/linux/sem.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/libgomp/config/linux/sem.h b/libgomp/config/linux/sem.h index da06ae5..bc0627d 100644 --- a/libgomp/config/linux/sem.h +++ b/libgomp/config/linux/sem.h @@ -85,4 +85,13 @@ gomp_sem_post (gomp_sem_t *sem) if (__builtin_expect (count & SEM_WAIT, 0)) gomp_sem_post_slow (sem); } + +static inline int +gomp_sem_getcount (gomp_sem_t *sem) +{ + int count = __atomic_load_n (sem, MEMMODEL_RELAXED); + if ((count & SEM_WAIT) != 0) + return -1; + return count / SEM_INC; +} #endif /* GOMP_SEM_H */ |