diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.h')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.h | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.h b/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.h index 37842263b6..00ff1b20fb 100644 --- a/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.h +++ b/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2003 Free Software Foundation, Inc. +/* 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 @@ -31,6 +31,7 @@ /* Initializer for compatibility lock. */ #define LLL_MUTEX_LOCK_INITIALIZER (0) #define LLL_MUTEX_LOCK_INITIALIZER_LOCKED (1) +#define LLL_MUTEX_LOCK_INITIALIZER_WAITERS (2) extern int __lll_mutex_lock_wait (int val, int *__futex) attribute_hidden; extern int __lll_mutex_timedlock_wait (int val, int *__futex, @@ -61,6 +62,28 @@ extern int __lll_mutex_unlock_wake (int *__futex) attribute_hidden; : "r0", "r1", "r2", "t", "memory"); \ __result; }) +#define lll_mutex_cond_trylock(futex) \ + ({ unsigned char __result; \ + __asm __volatile ("\ + .align 2\n\ + mova 1f,r0\n\ + nop\n\ + mov r15,r1\n\ + mov #-8,r15\n\ + 0: mov.l @%1,r2\n\ + cmp/eq r2,%3\n\ + bf 1f\n\ + mov.l %2,@%1\n\ + 1: mov r1,r15\n\ + mov #-1,%0\n\ + negc %0,%0"\ + : "=r" (__result) \ + : "r" (&(futex)), \ + "r" (LLL_MUTEX_LOCK_INITIALIZER_WAITERS), \ + "r" (LLL_MUTEX_LOCK_INITIALIZER) \ + : "r0", "r1", "r2", "t", "memory"); \ + __result; }) + #define lll_mutex_lock(futex) \ (void) ({ int __result, val, *__futex = &(futex); \ __asm __volatile ("\ |