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Diffstat (limited to 'linuxthreads/spinlock.h')
| -rw-r--r-- | linuxthreads/spinlock.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/linuxthreads/spinlock.h b/linuxthreads/spinlock.h new file mode 100644 index 0000000000..d324abbc84 --- /dev/null +++ b/linuxthreads/spinlock.h @@ -0,0 +1,30 @@ +/* Linuxthreads - a simple clone()-based implementation of Posix */ +/* threads for Linux. */ +/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) and */ +/* Richard Henderson (rth@tamu.edu) */ +/* */ +/* This program 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. */ +/* */ +/* This program 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. */ + +/* Spin locks */ + +static inline void acquire(int * spinlock) +{ + while (testandset(spinlock)) __sched_yield(); +} + +static inline void release(int * spinlock) +{ +#ifndef RELEASE + *spinlock = 0; +#else + RELEASE(spinlock); +#endif +} |