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authorUlrich Drepper <drepper@redhat.com>2004-03-24 06:34:59 +0000
committerUlrich Drepper <drepper@redhat.com>2004-03-24 06:34:59 +0000
commitce3f7d21bd70fc5475a6c2bfcb85b253e588309b (patch)
tree54f2e81f5a4eef53ceaa78b9dc0fda28bc2b7e18
parent04520d8eebe787181b5d74e5f5ddb0c068ee4117 (diff)
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Define lll_mutex_cond_trylock.
-rw-r--r--sysdeps/unix/sysv/linux/alpha/nptl/lowlevellock.h10
1 files changed, 9 insertions, 1 deletions
diff --git a/sysdeps/unix/sysv/linux/alpha/nptl/lowlevellock.h b/sysdeps/unix/sysv/linux/alpha/nptl/lowlevellock.h
index 9d125e0d6d..a7079a8490 100644
--- a/sysdeps/unix/sysv/linux/alpha/nptl/lowlevellock.h
+++ b/sysdeps/unix/sysv/linux/alpha/nptl/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))