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-rw-r--r--mach/lock-intern.h37
1 files changed, 22 insertions, 15 deletions
diff --git a/mach/lock-intern.h b/mach/lock-intern.h
index 9c6bab5..1f022f5 100644
--- a/mach/lock-intern.h
+++ b/mach/lock-intern.h
@@ -1,20 +1,20 @@
-/* Copyright (C) 1994 Free Software Foundation, Inc.
-This file is part of the GNU C Library.
+/* Copyright (C) 1994, 1996 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 Library General Public License as
-published by the Free Software Foundation; either version 2 of the
-License, or (at your option) any later version.
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 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
-Library General Public License for more details.
+ 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
+ Library General Public License for more details.
-You should have received a copy of the GNU Library General Public
-License along with the GNU C Library; see the file COPYING.LIB. If
-not, write to the Free Software Foundation, Inc., 675 Mass Ave,
-Cambridge, MA 02139, USA. */
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
#ifndef _LOCK_INTERN_H
#define _LOCK_INTERN_H
@@ -47,7 +47,7 @@ __spin_lock (__spin_lock_t *__lock)
__spin_lock_solid (__lock);
}
-/* Name space-clean internal interface to mutex locks.
+/* Name space-clean internal interface to mutex locks.
Code internal to the C library uses these functions to lock and unlock
mutex locks. These locks are of type `struct mutex', defined in
@@ -86,4 +86,11 @@ __mutex_unlock (void *__lock)
__mutex_unlock_solid (__lock);
}
+
+_EXTERN_INLINE int
+__mutex_trylock (void *__lock)
+{
+ return __spin_try_lock ((__spin_lock_t *) __lock);
+}
+
#endif /* lock-intern.h */