diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/alpha/lowlevellock.h')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/alpha/lowlevellock.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/alpha/lowlevellock.h b/nptl/sysdeps/unix/sysv/linux/alpha/lowlevellock.h index 9d125e0d6d..a7079a8490 100644 --- a/nptl/sysdeps/unix/sysv/linux/alpha/lowlevellock.h +++ b/nptl/sysdeps/unix/sysv/linux/alpha/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 @@ -80,6 +80,14 @@ __lll_mutex_trylock(int *futex) #define lll_mutex_trylock(lock) __lll_mutex_trylock (&(lock)) +static inline int __attribute__((always_inline)) +__lll_mutex_cond_trylock(int *futex) +{ + return atomic_compare_and_exchange_val_acq (futex, 2, 0) != 0; +} +#define lll_mutex_cond_trylock(lock) __lll_mutex_cond_trylock (&(lock)) + + extern void __lll_lock_wait (int *futex) attribute_hidden; static inline void __attribute__((always_inline)) |