diff options
author | Ulrich Drepper <drepper@redhat.com> | 2003-02-10 09:24:12 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 2003-02-10 09:24:12 +0000 |
commit | a54e8d33d17f6197ac629ac86e3381643b802bec (patch) | |
tree | e876d442ce7cdb13eca46ff57278a81d0022bf61 /nptl/sysdeps/unix/sysv/linux/sh/pthread_rwlock_rdlock.S | |
parent | f954eb1691045c888bfd8eab4ea4e25847f26c11 (diff) |
Update.
2003-02-08 kaz Kojima <kkojima@rr.iij4u.or.jp>
* sysdeps/sh/Makefile: New file.
* sysdeps/sh/bits/atomic.h: New file.
* sysdeps/sh/pthread_spin_init.c: New file.
* sysdeps/sh/pthread_spin_lock.c: New file.
* sysdeps/sh/pthread_spin_trylock.S: New file.
* sysdeps/sh/pthread_spin_unlock.S: New file.
* sysdeps/sh/pthreaddef.h: New file.
* sysdeps/sh/tcb-offsets.sym: New file.
* sysdeps/sh/td_ta_map_lwp2thr.c: New file.
* sysdeps/sh/tls.h: New file.
* sysdeps/unix/sysv/linux/sh/bits/pthreadtypes.h: New file.
* sysdeps/unix/sysv/linux/sh/bits/semaphore.h: New file.
* sysdeps/unix/sysv/linux/sh/createthread.c: New file.
* sysdeps/unix/sysv/linux/sh/fork.c: New file.
* sysdeps/unix/sysv/linux/sh/libc-lowlevellock.S: New file.
* sysdeps/unix/sysv/linux/sh/libc-lowlevelmutex.S: New file.
* sysdeps/unix/sysv/linux/sh/lowlevel-atomic.h: New file.
* sysdeps/unix/sysv/linux/sh/lowlevelcond.h: New file.
* sysdeps/unix/sysv/linux/sh/lowlevellock.S: New file.
* sysdeps/unix/sysv/linux/sh/lowlevellock.h: New file.
* sysdeps/unix/sysv/linux/sh/lowlevelmutex.S: New file.
* sysdeps/unix/sysv/linux/sh/lowlevelrwlock.h: New file.
* sysdeps/unix/sysv/linux/sh/pt-initfini.c: New file.
* sysdeps/unix/sysv/linux/sh/pt-vfork.S: New file.
* sysdeps/unix/sysv/linux/sh/pthread_barrier_wait.S: New file.
* sysdeps/unix/sysv/linux/sh/pthread_cond_broadcast.S: New file.
* sysdeps/unix/sysv/linux/sh/pthread_cond_signal.S: New file.
* sysdeps/unix/sysv/linux/sh/pthread_cond_timedwait.S: New file.
* sysdeps/unix/sysv/linux/sh/pthread_cond_wait.S: New file.
* sysdeps/unix/sysv/linux/sh/pthread_once.S: New file.
* sysdeps/unix/sysv/linux/sh/pthread_rwlock_rdlock.S: New file.
* sysdeps/unix/sysv/linux/sh/pthread_rwlock_timedrdlock.S: New file.
* sysdeps/unix/sysv/linux/sh/pthread_rwlock_timedwrlock.S: New file.
* sysdeps/unix/sysv/linux/sh/pthread_rwlock_unlock.S: New file.
* sysdeps/unix/sysv/linux/sh/pthread_rwlock_wrlock.S: New file.
* sysdeps/unix/sysv/linux/sh/sem_post.S: New file.
* sysdeps/unix/sysv/linux/sh/sem_timedwait.S: New file.
* sysdeps/unix/sysv/linux/sh/sem_trywait.S: New file.
* sysdeps/unix/sysv/linux/sh/sem_wait.S: New file.
* sysdeps/unix/sysv/linux/sh/sysdep-cancel.h: New file.
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/sh/pthread_rwlock_rdlock.S')
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/sh/pthread_rwlock_rdlock.S | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/sh/pthread_rwlock_rdlock.S b/nptl/sysdeps/unix/sysv/linux/sh/pthread_rwlock_rdlock.S new file mode 100644 index 0000000000..2c6adf81c2 --- /dev/null +++ b/nptl/sysdeps/unix/sysv/linux/sh/pthread_rwlock_rdlock.S @@ -0,0 +1,220 @@ +/* Copyright (C) 2003 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <sysdep.h> +#include <lowlevelrwlock.h> +#include <tcb-offsets.h> +#include "lowlevel-atomic.h" + +#define SYS_futex 240 +#define FUTEX_WAIT 0 +#define FUTEX_WAKE 1 + +#define EAGAIN 11 +#define EDEADLK 35 + + + .text + + .globl __pthread_rwlock_rdlock + .type __pthread_rwlock_rdlock,@function + .align 5 +__pthread_rwlock_rdlock: + mov.l r12, @-r15 + mov.l r8, @-r15 + sts.l pr, @-r15 + mov r4, r8 + + /* Get the lock. */ + mov #1, r3 +#if MUTEX == 0 + XADD (r3, @r4, r2) +#else + XADD (r3, @(MUTEX,r4), r2) +#endif + tst r2, r2 + bf 1f +2: + mov.l @(WRITER,r8), r0 + tst r0, r0 + bf 14f + mov.l @(WRITERS_QUEUED,r8), r0 + tst r0, r0 + bt 5f + mov.l @(FLAGS,r8), r0 + tst r0, r0 + bt 5f +3: + mov.l @(READERS_QUEUED,r8), r0 + add #1, r0 + mov.l r0, @(READERS_QUEUED,r8) + tst r0, r0 + bt 4f + +#if MUTEX == 0 + DEC (@r8, r2) +#else + DEC (@(MUTEX,r8), r2) +#endif + tst r2, r2 + bf 10f +11: + mov r8, r4 + add #READERS_WAKEUP, r4 + mov #FUTEX_WAIT, r5 + mov #0, r6 + mov #SYS_futex, r3 + extu.b r3, r3 + trapa #0x14 + SYSCALL_INST_PAD + + /* Reget the lock. */ + mov #1, r3 +#if MUTEX == 0 + XADD (r3, @r4, r2) +#else + XADD (r3, @(MUTEX,r4), r2) +#endif + tst r2, r2 + bf 12f +13: + mov.l @(READERS_QUEUED,r8), r0 + add #-1, r0 + mov.l r0, @(READERS_QUEUED,r8) + tst r0, r0 + bf 2b + bra 2b + mov.l r0, @(READERS_WAKEUP,r8) + +5: + mov #0, r3 + mov.l @(NR_READERS,r8), r0 + add #1, r0 + mov.l r0, @(NR_READERS,r8) + tst r0, r0 + bt 8f + +9: +#if MUTEX == 0 + DEC (@r8, r2) +#else + DEC (@(MUTEX,r8), r2) +#endif + tst r2, r2 + bf 6f +7: + lds.l @r15+, pr + mov.l @r15+, r8 + mov.l @r15+, r12 + rts + mov r3, r0 + +1: + mov r8, r5 +#if MUTEX != 0 + add #MUTEX, r5 +#endif + mov r2, r4 + mov.l .Lwait0, r1 + bsrf r1 + nop +.Lwait0b: + bra 2b + nop +14: + stc gbr, r1 + mov.w .Ltcboff,r2 + sub r2,r1 + mov.l @(8,r1),r1 + cmp/eq r1, r0 + bf 3b + /* Deadlock detected. */ + bra 9b + mov #EDEADLK, r3 + +6: + mov r8, r4 +#if MUTEX != 0 + add #MUTEX, r4 +#endif + mov.l .Lwake0, r1 + bsrf r1 + nop +.Lwake0b: + bra 7b + mov #0, r3 + +8: + /* Overflow. */ + mov.l @(NR_READERS,r8), r1 + add #-1, r1 + mov.l r1, @(NR_READERS,r8) + bra 9b + mov #EAGAIN, r3 + +4: + /* Overflow. */ + mov.l @(READERS_QUEUED,r8), r1 + add #-1, r1 + mov.l r1, @(READERS_QUEUED,r8) + bra 9b + mov #EAGAIN, r3 + +10: + mov r8, r4 +#if MUTEX != 0 + add #MUTEX, r4 +#endif + mov.l .Lwake1, r1 + bsrf r1 + nop +.Lwake1b: + bra 11b + nop + +12: + mov r8, r5 +#if MUTEX != 0 + add #MUTEX, r5 +#endif + mov r2, r4 + mov.l .Lwait1, r1 + bsrf r1 + nop +.Lwait1b: + bra 13b + nop + +.Ltcboff: + .word TLS_PRE_TCB_SIZE + .align 2 +.Lwait0: + .long __lll_mutex_lock_wait-.Lwait0b +.Lwake0: + .long __lll_mutex_unlock_wake-.Lwake0b +.Lwait1: + .long __lll_mutex_lock_wait-.Lwait1b +.Lwake1: + .long __lll_mutex_unlock_wake-.Lwake1b + .size __pthread_rwlock_rdlock,.-__pthread_rwlock_rdlock + + .globl pthread_rwlock_rdlock +pthread_rwlock_rdlock = __pthread_rwlock_rdlock + + .globl __pthread_rwlock_rdlock_internal +__pthread_rwlock_rdlock_internal = __pthread_rwlock_rdlock |