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| author | Ulrich Drepper <drepper@redhat.com> | 2007-08-15 06:39:43 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2007-08-15 06:39:43 +0000 |
| commit | c20455999c80f6d0f80d99e317ba05a803b76f60 (patch) | |
| tree | aa01ef93db5f624436c11dfc3ed1ad6847fe0340 /nptl | |
| parent | 467d1345e0b6e379954d255f88504b8fe1af6e7b (diff) | |
| download | glibc-c20455999c80f6d0f80d99e317ba05a803b76f60.zip glibc-c20455999c80f6d0f80d99e317ba05a803b76f60.tar.gz glibc-c20455999c80f6d0f80d99e317ba05a803b76f60.tar.bz2 | |
(__pthread_cond_broadcast): Pass LLL_PRIVATE to lll_* and or FUTEX_PRIVATE_FLAG into SYS_futex op if cv is process private. Don't use FUTEX_CMP_REQUEUE if dep_mutex is not process private.
Diffstat (limited to 'nptl')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/sh/pthread_cond_broadcast.S | 54 |
1 files changed, 50 insertions, 4 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/sh/pthread_cond_broadcast.S b/nptl/sysdeps/unix/sysv/linux/sh/pthread_cond_broadcast.S index b173f2d..7dff15a 100644 --- a/nptl/sysdeps/unix/sysv/linux/sh/pthread_cond_broadcast.S +++ b/nptl/sysdeps/unix/sysv/linux/sh/pthread_cond_broadcast.S @@ -93,13 +93,24 @@ __pthread_cond_broadcast: bt/s 9f add #cond_futex, r4 - /* XXX: The kernel so far doesn't support requeue to PI futex. */ + /* XXX: The kernel only supports FUTEX_CMP_REQUEUE to the same + type of futex (private resp. shared). */ mov.l @(MUTEX_KIND,r9), r0 - tst #PI_BIT, r0 + tst #(PI_BIT|PS_BIT), r0 bf 9f /* Wake up all threads. */ - mov #FUTEX_CMP_REQUEUE, r5 +#ifdef __ASSUME_PRIVATE_FUTEX + mov #(FUTEX_CMP_REQUEUE|FUTEX_PRIVATE_FLAG), r5 + extu.b r5, r5 +#else + stc gbr, r1 + mov.w .Lpfoff, r2 + add r2, r1 + mov.l @r1, r5 + mov #FUTEX_CMP_REQUEUE, r0 + or r0, r5 +#endif mov #1, r6 mov #-1, r7 shlr r7 /* r7 = 0x7fffffff */ @@ -156,7 +167,12 @@ __pthread_cond_broadcast: #if cond_lock != 0 add #cond_lock, r5 #endif + mov.l @(dep_mutex,r8), r0 + cmp/eq #-1, r0 + bf/s 99f + mov #LLL_PRIVATE, r6 mov #LLL_SHARED, r6 +99: extu.b r6, r6 mov.l .Lwait5, r1 bsrf r1 @@ -171,7 +187,12 @@ __pthread_cond_broadcast: #if cond_lock != 0 add #cond_lock, r4 #endif + mov.l @(dep_mutex,r8), r0 + cmp/eq #-1, r0 + bf/s 99f + mov #LLL_PRIVATE, r5 mov #LLL_SHARED, r5 +99: mov.l .Lwake5, r1 bsrf r1 extu.b r5, r5 @@ -185,7 +206,12 @@ __pthread_cond_broadcast: #if cond_lock != 0 add #cond_lock, r4 #endif + mov #-1, r0 + cmp/eq r0, r9 + bf/s 99f + mov #LLL_PRIVATE, r5 mov #LLL_SHARED, r5 +99: mov.l .Lwake6, r1 bsrf r1 extu.b r5, r5 @@ -194,7 +220,22 @@ __pthread_cond_broadcast: nop 9: - mov #FUTEX_WAKE, r5 + mov #-1, r0 + cmp/eq r0, r9 + bt/s 99f + mov #FUTEX_WAKE, r5 +#ifdef __ASSUME_PRIVATE_FUTEX + mov #(FUTEX_WAKE|FUTEX_PRIVATE_FLAG), r5 + extu.b r5, r5 +#else + stc gbr, r1 + mov.w .Lpfoff, r2 + add r2, r1 + mov.l @r1, r5 + mov #FUTEX_WAKE, r0 + or r0, r5 +#endif +99: mov #-1, r6 shlr r6 /* r6 = 0x7fffffff */ mov #0, r7 @@ -205,6 +246,11 @@ __pthread_cond_broadcast: bra 10b nop +#ifndef __ASSUME_PRIVATE_FUTEX +.Lpfoff: + .word PRIVATE_FUTEX - TLS_PRE_TCB_SIZE +#endif + .align 2 .Lwait5: .long __lll_lock_wait-.Lwait5b |