diff options
Diffstat (limited to 'nptl')
-rw-r--r-- | nptl/ChangeLog | 5 | ||||
-rw-r--r-- | nptl/DESIGN-rwlock.txt | 13 | ||||
-rw-r--r-- | nptl/sysdeps/pthread/pthread_rwlock_rdlock.c | 8 | ||||
-rw-r--r-- | nptl/sysdeps/pthread/pthread_rwlock_timedrdlock.c | 9 | ||||
-rw-r--r-- | nptl/sysdeps/pthread/pthread_rwlock_timedwrlock.c | 6 | ||||
-rw-r--r-- | nptl/sysdeps/pthread/pthread_rwlock_unlock.c | 4 | ||||
-rw-r--r-- | nptl/sysdeps/pthread/pthread_rwlock_wrlock.c | 5 | ||||
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_rdlock.S | 33 | ||||
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_timedrdlock.S | 47 | ||||
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_timedwrlock.S | 48 | ||||
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_unlock.S | 41 | ||||
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_wrlock.S | 32 |
12 files changed, 171 insertions, 80 deletions
diff --git a/nptl/ChangeLog b/nptl/ChangeLog index 487a2aab99..93d70ad970 100644 --- a/nptl/ChangeLog +++ b/nptl/ChangeLog @@ -11,6 +11,11 @@ Likewise. * sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_unlock.S: Likewise. * sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_wrlock.S: Likewise. + * sysdeps/pthread/pthread_rwlock_rdlock.c: Likewise. + * sysdeps/pthread/pthread_rwlock_timedrdlock.c: Likewise. + * sysdeps/pthread/pthread_rwlock_timedwrlock.c: Likewise. + * sysdeps/pthread/pthread_rwlock_unlock.c: Likewise. + * sysdeps/pthread/pthread_rwlock_wrlock.c: Likewise. 2003-02-23 Roland McGrath <roland@redhat.com> diff --git a/nptl/DESIGN-rwlock.txt b/nptl/DESIGN-rwlock.txt index 6262a7a5b9..d97c084484 100644 --- a/nptl/DESIGN-rwlock.txt +++ b/nptl/DESIGN-rwlock.txt @@ -42,13 +42,12 @@ pthread_rwlock_rdlock(pthread_rwlock_t *rwlock) break; rwlock->nr_readers_queued++; + val = rwlock->readers_wakeup; lll_unlock(rwlock->lock); - futex_wait(&rwlock->readers_wakeup, 0) + futex_wait(&rwlock->readers_wakeup, val) lll_lock(rwlock->lock); - if (!--rwlock->nr_readers_queued) - rwlock->readers_wakeup = 0; } rwlock->readers++; lll_unlock(rwlock->lock); @@ -73,13 +72,13 @@ pthread_rwlock_wrlock(pthread_rwlock_t *rwlock) break; rwlock->nr_writers_queued++; + val = rwlock->writer_wakeup; lll_unlock(rwlock->lock); - futex_wait(&rwlock->writer_wakeup, 0); + futex_wait(&rwlock->writer_wakeup, val); lll_lock(rwlock->lock); rwlock->nr_writers_queued--; - rwlock->writer_wakeup = 0; } rwlock->writer = pthread_self(); lll_unlock(rwlock->lock); @@ -96,11 +95,11 @@ pthread_rwlock_unlock(pthread_rwlock_t *rwlock) if (!rwlock->readers) { if (rwlock->nr_writers_queued) { - rwlock->writer_wakeup = 1; + ++rwlock->writer_wakeup; futex_wake(&rwlock->writer_wakeup, 1); } else if (rwlock->nr_readers_queued) { - rwlock->readers_wakeup = 1; + ++rwlock->readers_wakeup; futex_wake(&rwlock->readers_wakeup, MAX_INT); } } diff --git a/nptl/sysdeps/pthread/pthread_rwlock_rdlock.c b/nptl/sysdeps/pthread/pthread_rwlock_rdlock.c index b556ccfd1c..197af9c970 100644 --- a/nptl/sysdeps/pthread/pthread_rwlock_rdlock.c +++ b/nptl/sysdeps/pthread/pthread_rwlock_rdlock.c @@ -72,18 +72,16 @@ __pthread_rwlock_rdlock (rwlock) break; } + int waitval = rwlock->__data.__readers_wakeup; + /* Free the lock. */ lll_mutex_unlock (rwlock->__data.__lock); /* Wait for the writer to finish. */ - lll_futex_wait (&rwlock->__data.__readers_wakeup, 0); + lll_futex_wait (&rwlock->__data.__readers_wakeup, waitval); /* Get the lock. */ lll_mutex_lock (rwlock->__data.__lock); - - /* To start over again, remove the thread from the reader list. */ - if (--rwlock->__data.__nr_readers_queued == 0) - rwlock->__data.__readers_wakeup = 0; } /* We are done, free the lock. */ diff --git a/nptl/sysdeps/pthread/pthread_rwlock_timedrdlock.c b/nptl/sysdeps/pthread/pthread_rwlock_timedrdlock.c index 4f7b78dfd2..fb6382544e 100644 --- a/nptl/sysdeps/pthread/pthread_rwlock_timedrdlock.c +++ b/nptl/sysdeps/pthread/pthread_rwlock_timedrdlock.c @@ -105,19 +105,18 @@ pthread_rwlock_timedrdlock (rwlock, abstime) break; } + int waitval = rwlock->__data.__readers_wakeup; + /* Free the lock. */ lll_mutex_unlock (rwlock->__data.__lock); /* Wait for the writer to finish. */ - result = lll_futex_timed_wait (&rwlock->__data.__readers_wakeup, 0, &rt); + result = lll_futex_timed_wait (&rwlock->__data.__readers_wakeup, + waitval, &rt); /* Get the lock. */ lll_mutex_lock (rwlock->__data.__lock); - /* To start over again, remove the thread from the reader list. */ - if (--rwlock->__data.__nr_readers_queued == 0) - rwlock->__data.__readers_wakeup = 0; - /* Did the futex call time out? */ if (result == -ETIMEDOUT) { diff --git a/nptl/sysdeps/pthread/pthread_rwlock_timedwrlock.c b/nptl/sysdeps/pthread/pthread_rwlock_timedwrlock.c index 4c0dc38348..0715f835af 100644 --- a/nptl/sysdeps/pthread/pthread_rwlock_timedwrlock.c +++ b/nptl/sysdeps/pthread/pthread_rwlock_timedwrlock.c @@ -95,18 +95,20 @@ pthread_rwlock_timedwrlock (rwlock, abstime) break; } + int waitval = rwlock->__data.__writer_wakeup; + /* Free the lock. */ lll_mutex_unlock (rwlock->__data.__lock); /* Wait for the writer or reader(s) to finish. */ - result = lll_futex_timed_wait (&rwlock->__data.__writer_wakeup, 0, &rt); + result = lll_futex_timed_wait (&rwlock->__data.__writer_wakeup, + waitval, &rt); /* Get the lock. */ lll_mutex_lock (rwlock->__data.__lock); /* To start over again, remove the thread from the writer list. */ --rwlock->__data.__nr_writers_queued; - rwlock->__data.__writer_wakeup = 0; /* Did the futex call time out? */ if (result == -ETIMEDOUT) diff --git a/nptl/sysdeps/pthread/pthread_rwlock_unlock.c b/nptl/sysdeps/pthread/pthread_rwlock_unlock.c index 325007e5b3..6e0c92ba3f 100644 --- a/nptl/sysdeps/pthread/pthread_rwlock_unlock.c +++ b/nptl/sysdeps/pthread/pthread_rwlock_unlock.c @@ -35,12 +35,12 @@ int __pthread_rwlock_unlock (pthread_rwlock_t *rwlock) { if (rwlock->__data.__nr_writers_queued) { - rwlock->__data.__writer_wakeup = 1; + ++rwlock->__data.__writer_wakeup; lll_futex_wake(&rwlock->__data.__writer_wakeup, 1); } else { - rwlock->__data.__readers_wakeup = 1; + ++rwlock->__data.__readers_wakeup; lll_futex_wake(&rwlock->__data.__readers_wakeup, INT_MAX); } } diff --git a/nptl/sysdeps/pthread/pthread_rwlock_wrlock.c b/nptl/sysdeps/pthread/pthread_rwlock_wrlock.c index 024b6711a9..03c37a1933 100644 --- a/nptl/sysdeps/pthread/pthread_rwlock_wrlock.c +++ b/nptl/sysdeps/pthread/pthread_rwlock_wrlock.c @@ -63,18 +63,19 @@ __pthread_rwlock_wrlock (rwlock) break; } + int waitval = rwlock->__data.__writer_wakeup; + /* Free the lock. */ lll_mutex_unlock (rwlock->__data.__lock); /* Wait for the writer or reader(s) to finish. */ - lll_futex_wait (&rwlock->__data.__writer_wakeup, 0); + lll_futex_wait (&rwlock->__data.__writer_wakeup, waitval); /* Get the lock. */ lll_mutex_lock (rwlock->__data.__lock); /* To start over again, remove the thread from the writer list. */ --rwlock->__data.__nr_writers_queued; - rwlock->__data.__writer_wakeup = 0; } /* We are done, free the lock. */ diff --git a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_rdlock.S b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_rdlock.S index 47ae4fa35a..f8f2e06b18 100644 --- a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_rdlock.S +++ b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_rdlock.S @@ -45,7 +45,6 @@ __pthread_rwlock_rdlock: pushl %ebx xorl %esi, %esi - xorl %edx, %edx movl 12(%esp), %ebx /* Get the lock. */ @@ -70,6 +69,8 @@ __pthread_rwlock_rdlock: 3: incl READERS_QUEUED(%ebx) je 4f + movl READERS_WAKEUP(%ebx), %edx + LOCK #if MUTEX == 0 decl (%ebx) @@ -97,8 +98,6 @@ __pthread_rwlock_rdlock: jne 12f 13: decl READERS_QUEUED(%ebx) - jne 2b - movl $0, READERS_WAKEUP(%ebx) jmp 2b 5: xorl %ecx, %ecx @@ -118,7 +117,12 @@ __pthread_rwlock_rdlock: popl %esi ret -1: movl %ebx, %ecx +1: +#if MUTEX == 0 + movl %ebx, %ecx +#else + leal MUTEX(%ebx), %ecx +#endif call __lll_mutex_lock_wait jmp 2b @@ -128,7 +132,12 @@ __pthread_rwlock_rdlock: movl $EDEADLK, %ecx jmp 9b -6: movl %ebx, %eax +6: +#if MUTEX == 0 + movl %ebx, %eax +#else + leal MUTEX(%ebx), %eax +#endif call __lll_mutex_unlock_wake jmp 7b @@ -142,11 +151,21 @@ __pthread_rwlock_rdlock: movl $EAGAIN, %ecx jmp 9b -10: movl %ebx, %eax +10: +#if MUTEX == 0 + movl %ebx, %eax +#else + leal MUTEX(%ebx), %eax +#endif call __lll_mutex_unlock_wake jmp 11b -12: movl %ebx, %ecx +12: +#if MUTEX == 0 + movl %ebx, %ecx +#else + leal MUTEX(%ebx), %ecx +#endif call __lll_mutex_lock_wait jmp 13b .size __pthread_rwlock_rdlock,.-__pthread_rwlock_rdlock diff --git a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_timedrdlock.S b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_timedrdlock.S index b275b8b922..2e47350990 100644 --- a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_timedrdlock.S +++ b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_timedrdlock.S @@ -79,6 +79,8 @@ pthread_rwlock_timedrdlock: incl READERS_QUEUED(%ebp) je 4f + movl READERS_WAKEUP(%ebp), %esi + LOCK #if MUTEX == 0 decl (%ebp) @@ -110,9 +112,9 @@ pthread_rwlock_timedrdlock: /* Futex call. */ movl %ecx, (%esp) /* Store relative timeout. */ movl %edx, 4(%esp) + movl %esi, %edx xorl %ecx, %ecx /* movl $FUTEX_WAIT, %ecx */ movl %esp, %esi - movl %ecx, %edx leal READERS_WAKEUP(%ebp), %ebx movl $SYS_futex, %eax ENTER_KERNEL @@ -130,12 +132,12 @@ pthread_rwlock_timedrdlock: testl %eax, %eax jne 12f -13: cmpl $-ETIMEDOUT, %ecx - je 18f - decl READERS_QUEUED(%ebp) +13: decl READERS_QUEUED(%ebp) + cmpl $-ETIMEDOUT, %edx jne 2b - movl $0, READERS_WAKEUP(%ebp) - jmp 2b + +18: movl $ETIMEDOUT, %ecx + jmp 9f 5: xorl %ecx, %ecx @@ -158,7 +160,12 @@ pthread_rwlock_timedrdlock: popl %esi ret -1: movl %ebp, %ecx +1: +#if MUTEX == 0 + movl %ebp, %ecx +#else + leal MUTEX(%ebp), %ecx +#endif call __lll_mutex_lock_wait jmp 2b @@ -167,7 +174,12 @@ pthread_rwlock_timedrdlock: movl $EDEADLK, %ecx jmp 9b -6: movl %ebp, %eax +6: +#if MUTEX == 0 + movl %ebp, %eax +#else + leal MUTEX(%ebp), %eax +#endif call __lll_mutex_unlock_wake jmp 7b @@ -181,20 +193,27 @@ pthread_rwlock_timedrdlock: movl $EAGAIN, %ecx jmp 9b -10: movl %ebp, %eax +10: +#if MUTEX == 0 + movl %ebp, %eax +#else + leal MUTEX(%ebp), %eax +#endif call __lll_mutex_unlock_wake jmp 11b -12: movl %ebx, %ecx +12: +#if MUTEX == 0 + movl %ebp, %ecx +#else + leal MUTEX(%ebp), %ecx +#endif call __lll_mutex_lock_wait jmp 13b -16: movl $-ETIMEDOUT, %ecx +16: movl $-ETIMEDOUT, %edx jmp 17b -18: movl $ETIMEDOUT, %ecx - jmp 9b - 19: movl $EINVAL, %ecx jmp 9b .size pthread_rwlock_timedrdlock,.-pthread_rwlock_timedrdlock diff --git a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_timedwrlock.S b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_timedwrlock.S index ec8f4b9f6d..fd9747e8e6 100644 --- a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_timedwrlock.S +++ b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_timedwrlock.S @@ -77,6 +77,8 @@ pthread_rwlock_timedwrlock: incl WRITERS_QUEUED(%ebp) je 4f + movl WRITERS_WAKEUP(%ebp), %esi + LOCK #if MUTEX == 0 decl (%ebp) @@ -108,9 +110,9 @@ pthread_rwlock_timedwrlock: /* Futex call. */ movl %ecx, (%esp) /* Store relative timeout. */ movl %edx, 4(%esp) + movl %esi, %edx xorl %ecx, %ecx /* movl $FUTEX_WAIT, %ecx */ movl %esp, %esi - movl %ecx, %edx leal WRITERS_WAKEUP(%ebp), %ebx movl $SYS_futex, %eax ENTER_KERNEL @@ -128,11 +130,12 @@ pthread_rwlock_timedwrlock: testl %eax, %eax jne 12f -13: cmpl $-ETIMEDOUT, %ecx - je 18f - decl WRITERS_QUEUED(%ebp) - movl $0, WRITERS_WAKEUP(%ebp) - jmp 2b +13: decl WRITERS_QUEUED(%ebp) + cmpl $-ETIMEDOUT, %edx + jne 2b + +18: movl $ETIMEDOUT, %ecx + jmp 9f 5: xorl %ecx, %ecx @@ -155,7 +158,12 @@ pthread_rwlock_timedwrlock: popl %esi ret -1: movl %ebp, %ecx +1: +#if MUTEX == 0 + movl %ebp, %ecx +#else + leal MUTEX(%ebp), %ecx +#endif call __lll_mutex_lock_wait jmp 2b @@ -164,7 +172,12 @@ pthread_rwlock_timedwrlock: 20: movl $EDEADLK, %ecx jmp 9b -6: movl %ebp, %eax +6: +#if MUTEX == 0 + movl %ebp, %eax +#else + leal MUTEX(%ebp), %eax +#endif call __lll_mutex_unlock_wake jmp 7b @@ -173,20 +186,27 @@ pthread_rwlock_timedwrlock: movl $EAGAIN, %ecx jmp 9b -10: movl %ebp, %eax +10: +#if MUTEX == 0 + movl %ebp, %eax +#else + leal MUTEX(%ebp), %eax +#endif call __lll_mutex_unlock_wake jmp 11b -12: movl %ebx, %ecx +12: +#if MUTEX == 0 + movl %ebp, %ecx +#else + leal MUTEX(%ebp), %ecx +#endif call __lll_mutex_lock_wait jmp 13b -16: movl $-ETIMEDOUT, %ecx +16: movl $-ETIMEDOUT, %edx jmp 17b -18: movl $ETIMEDOUT, %ecx - jmp 9b - 19: movl $EINVAL, %ecx jmp 9b .size pthread_rwlock_timedwrlock,.-pthread_rwlock_timedwrlock diff --git a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_unlock.S b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_unlock.S index 829604662e..bb5f8d1bc8 100644 --- a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_unlock.S +++ b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_unlock.S @@ -42,8 +42,6 @@ __pthread_rwlock_unlock: pushl %esi pushl %edi - xorl %esi, %esi - xorl %edx, %edx movl 16(%esp), %edi /* Get the lock. */ @@ -64,20 +62,21 @@ __pthread_rwlock_unlock: 5: movl $0, WRITER(%edi) - movl $0x7fffffff, %edx - leal READERS_WAKEUP(%edi), %ebx movl $1, %ecx - leal WRITERS_WAKEUP(%edi), %eax - cmpl $0, WRITERS_QUEUED(%edi) -#ifdef HAVE_CMOV - cmovnel %ecx, %edx - cmovnel %eax, %ebx -#else - je 0f + leal WRITERS_WAKEUP(%edi), %ebx movl %ecx, %edx - movl %eax, %ebx -0: -#endif + cmpl $0, WRITERS_QUEUED(%edi) + jne 0f + + /* If also no readers waiting nothing to do. */ + cmpl $0, READERS_QUEUED(%edi) + je 6f + + movl $0x7fffffff, %edx + leal READERS_WAKEUP(%edi), %ebx + +0: incl (%ebx) + xorl %esi, %esi movl $SYS_futex, %eax ENTER_KERNEL @@ -95,11 +94,21 @@ __pthread_rwlock_unlock: popl %ebx ret -1: movl %edi, %ecx +1: +#if MUTEX == 0 + movl %edi, %ecx +#else + leal MUTEX(%edx), %ecx +#endif call __lll_mutex_lock_wait jmp 2b -3: movl %edi, %eax +3: +#if MUTEX == 0 + movl %edi, %eax +#else + leal MUTEX(%edx), %eax +#endif call __lll_mutex_unlock_wake jmp 4b diff --git a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_wrlock.S b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_wrlock.S index ff3960960d..080e66305e 100644 --- a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_wrlock.S +++ b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_wrlock.S @@ -45,7 +45,6 @@ __pthread_rwlock_wrlock: pushl %ebx xorl %esi, %esi - xorl %edx, %edx movl 12(%esp), %ebx /* Get the lock. */ @@ -68,6 +67,8 @@ __pthread_rwlock_wrlock: 3: incl WRITERS_QUEUED(%ebx) je 4f + movl WRITERS_WAKEUP(%ebx), %edx + LOCK #if MUTEX == 0 decl (%ebx) @@ -95,7 +96,6 @@ __pthread_rwlock_wrlock: jne 12f 13: decl WRITERS_QUEUED(%ebx) - movl $0, WRITERS_WAKEUP(%ebx) jmp 2b 5: xorl %ecx, %ecx @@ -115,7 +115,12 @@ __pthread_rwlock_wrlock: popl %esi ret -1: movl %ebx, %ecx +1: +#if MUTEX == 0 + movl %ebx, %ecx +#else + leal MUTEX(%ebx), %ecx +#endif call __lll_mutex_lock_wait jmp 2b @@ -124,7 +129,12 @@ __pthread_rwlock_wrlock: movl $EDEADLK, %ecx jmp 9b -6: movl %ebx, %eax +6: +#if MUTEX == 0 + movl %ebx, %eax +#else + leal MUTEX(%ebx), %eax +#endif call __lll_mutex_unlock_wake jmp 7b @@ -132,11 +142,21 @@ __pthread_rwlock_wrlock: movl $EAGAIN, %ecx jmp 9b -10: movl %ebx, %eax +10: +#if MUTEX == 0 + movl %ebx, %eax +#else + leal MUTEX(%ebx), %eax +#endif call __lll_mutex_unlock_wake jmp 11b -12: movl %ebx, %ecx +12: +#if MUTEX == 0 + movl %ebx, %ecx +#else + leal MUTEX(%ebx), %ecx +#endif call __lll_mutex_lock_wait jmp 13b .size __pthread_rwlock_wrlock,.-__pthread_rwlock_wrlock |