diff options
Diffstat (limited to 'mach/lock-intern.h')
| -rw-r--r-- | mach/lock-intern.h | 37 |
1 files changed, 22 insertions, 15 deletions
diff --git a/mach/lock-intern.h b/mach/lock-intern.h index 9c6bab5ae2..1f022f5b0a 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 */ |