/* Copyright (C) 2003, 2004 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 #include #include #include "lowlevel-atomic.h" #define FUTEX_WAIT 0 #define FUTEX_WAKE 1 #define FUTEX_REQUEUE 3 #define EINVAL 22 .text /* int pthread_cond_signal (pthread_cond_t *cond) */ .globl __pthread_cond_signal .type __pthread_cond_signal, @function .align 5 __pthread_cond_signal: mov.l r8, @-r15 sts.l pr, @-r15 mov r4, r8 /* Get internal lock. */ mov #0, r3 mov #1, r4 #if cond_lock != 0 CMPXCHG (r3, @(cond_lock,r8), r4, r2) #else CMPXCHG (r3, @r8, r4, r2) #endif bf 1f 2: mov.l @(total_seq+4,r8),r0 mov.l @(total_seq,r8),r1 mov.l @(wakeup_seq+4,r8), r2 cmp/hi r2, r0 bt 3f cmp/hi r0, r2 bt 4f mov.l @(wakeup_seq,r8), r2 cmp/hi r2, r1 bf 4f 3: /* Bump the wakeup number. */ mov #1, r2 mov #0, r3 clrt mov.l @(wakeup_seq,r8),r0 mov.l @(wakeup_seq+4,r8),r1 addc r2, r0 addc r3, r1 mov.l r0,@(wakeup_seq,r8) mov.l r1,@(wakeup_seq+4,r8) mov.l @(cond_futex,r8),r0 add r2, r0 mov.l r0,@(cond_futex,r8) /* Wake up one thread. */ mov r8, r4 add #cond_futex, r4 mov #FUTEX_WAKE, r5 mov #1, r6 mov #0, r7 mov #SYS_futex, r3 extu.b r3, r3 trapa #0x14 SYSCALL_INST_PAD 4: /* Unlock. */ #if cond_lock != 0 DEC (@(cond_lock,r8), r2) #else DEC (@r8, r2) #endif tst r2, r2 bf 5f 6: mov #0, r0 lds.l @r15+, pr rts mov.l @r15+, r8 1: /* Initial locking failed. */ mov r8, r5 #if cond_lock != 0 add #cond_lock, r5 #endif mov.l .Lmwait4, r1 bsrf r1 mov r2, r4 .Lmwait4b: bra 2b nop 5: /* Unlock in loop requires wakeup. */ mov r8, r4 #if cond_lock != 0 add #cond_lock, r4 #endif mov.l .Lmwake4, r1 bsrf r1 nop .Lmwake4b: bra 6b nop .align 2 .Lmwait4: .long __lll_mutex_lock_wait-.Lmwait4b .Lmwake4: .long __lll_mutex_unlock_wake-.Lmwake4b .size __pthread_cond_signal, .-__pthread_cond_signal weak_alias (__pthread_cond_signal, pthread_cond_signal)