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ck_rwlock: Migrate to acquire / release and other barrier improvements.

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ck_pring
Samy Al Bahra 11 years ago
parent 38c40315a2
commit 0353cdcb23
1 changed files with 9 additions and 9 deletions
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18
include/ck_rwlock.h
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@ -46,7 +46,7 @@ ck_rwlock_init(struct ck_rwlock *rw)
rw->writer = 0; rw->writer = 0;
rw->n_readers = 0; rw->n_readers = 0;
ck_pr_fence_memory(); ck_pr_fence_store();
return; return;
} }
@ -54,7 +54,7 @@ CK_CC_INLINE static void
ck_rwlock_write_unlock(ck_rwlock_t *rw) ck_rwlock_write_unlock(ck_rwlock_t *rw)
{ {
ck_pr_fence_memory(); ck_pr_fence_release();
ck_pr_store_uint(&rw->writer, 0); ck_pr_store_uint(&rw->writer, 0);
return; return;
} }
@ -95,7 +95,7 @@ ck_rwlock_write_trylock(ck_rwlock_t *rw)
if (ck_pr_fas_uint(&rw->writer, 1) != 0) if (ck_pr_fas_uint(&rw->writer, 1) != 0)
return false; return false;
ck_pr_fence_memory(); ck_pr_fence_atomic_load();
if (ck_pr_load_uint(&rw->n_readers) != 0) { if (ck_pr_load_uint(&rw->n_readers) != 0) {
ck_rwlock_write_unlock(rw); ck_rwlock_write_unlock(rw);
@ -115,7 +115,7 @@ ck_rwlock_write_lock(ck_rwlock_t *rw)
while (ck_pr_fas_uint(&rw->writer, 1) != 0) while (ck_pr_fas_uint(&rw->writer, 1) != 0)
ck_pr_stall(); ck_pr_stall();
ck_pr_fence_memory(); ck_pr_fence_atomic_load();
while (ck_pr_load_uint(&rw->n_readers) != 0) while (ck_pr_load_uint(&rw->n_readers) != 0)
ck_pr_stall(); ck_pr_stall();
@ -140,7 +140,7 @@ ck_rwlock_read_trylock(ck_rwlock_t *rw)
* Serialize with respect to concurrent write * Serialize with respect to concurrent write
* lock operation. * lock operation.
*/ */
ck_pr_fence_memory(); ck_pr_fence_atomic_load();
if (ck_pr_load_uint(&rw->writer) == 0) { if (ck_pr_load_uint(&rw->writer) == 0) {
ck_pr_fence_load(); ck_pr_fence_load();
@ -193,7 +193,7 @@ CK_CC_INLINE static void
ck_rwlock_read_unlock(ck_rwlock_t *rw) ck_rwlock_read_unlock(ck_rwlock_t *rw)
{ {
ck_pr_fence_memory(); ck_pr_fence_load_atomic();
ck_pr_dec_uint(&rw->n_readers); ck_pr_dec_uint(&rw->n_readers);
return; return;
} }
@ -225,7 +225,7 @@ ck_rwlock_recursive_write_lock(ck_rwlock_recursive_t *rw, unsigned int tid)
while (ck_pr_cas_uint(&rw->rw.writer, 0, tid) == false) while (ck_pr_cas_uint(&rw->rw.writer, 0, tid) == false)
ck_pr_stall(); ck_pr_stall();
ck_pr_fence_memory(); ck_pr_fence_atomic_load();
while (ck_pr_load_uint(&rw->rw.n_readers) != 0) while (ck_pr_load_uint(&rw->rw.n_readers) != 0)
ck_pr_stall(); ck_pr_stall();
@ -247,7 +247,7 @@ ck_rwlock_recursive_write_trylock(ck_rwlock_recursive_t *rw, unsigned int tid)
if (ck_pr_cas_uint(&rw->rw.writer, 0, tid) == false) if (ck_pr_cas_uint(&rw->rw.writer, 0, tid) == false)
return false; return false;
ck_pr_fence_memory(); ck_pr_fence_atomic_load();
if (ck_pr_load_uint(&rw->rw.n_readers) != 0) { if (ck_pr_load_uint(&rw->rw.n_readers) != 0) {
ck_pr_store_uint(&rw->rw.writer, 0); ck_pr_store_uint(&rw->rw.writer, 0);
@ -264,7 +264,7 @@ ck_rwlock_recursive_write_unlock(ck_rwlock_recursive_t *rw)
{ {
if (--rw->wc == 0) { if (--rw->wc == 0) {
ck_pr_fence_memory(); ck_pr_fence_release();
ck_pr_store_uint(&rw->rw.writer, 0); ck_pr_store_uint(&rw->rw.writer, 0);
} }

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