diff options
Diffstat (limited to 'lib/libc/include/spinlock.h')
| -rw-r--r-- | lib/libc/include/spinlock.h | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/lib/libc/include/spinlock.h b/lib/libc/include/spinlock.h new file mode 100644 index 0000000..c9facc5 --- /dev/null +++ b/lib/libc/include/spinlock.h @@ -0,0 +1,70 @@ +/* + * Copyright (c) 1998 John Birrell <jb@cimlogic.com.au>. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the author nor the names of any co-contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + * + * Lock definitions used in both libc and libpthread. + * + */ + +#ifndef _SPINLOCK_H_ +#define _SPINLOCK_H_ +#include <sys/cdefs.h> +#include <sys/types.h> + +/* + * Lock structure with room for debugging information. + */ +struct _spinlock { + volatile long access_lock; + volatile long lock_owner; + volatile char *fname; + volatile int lineno; +}; +typedef struct _spinlock spinlock_t; + +#define _SPINLOCK_INITIALIZER { 0, 0, 0, 0 } + +#define _SPINUNLOCK(_lck) _spinunlock(_lck); +#ifdef _LOCK_DEBUG +#define _SPINLOCK(_lck) _spinlock_debug(_lck, __FILE__, __LINE__) +#else +#define _SPINLOCK(_lck) _spinlock(_lck) +#endif + +/* + * Thread function prototype definitions: + */ +__BEGIN_DECLS +long _atomic_lock(volatile long *); +void _spinlock(spinlock_t *); +void _spinunlock(spinlock_t *); +void _spinlock_debug(spinlock_t *, char *, int); +__END_DECLS + +#endif /* _SPINLOCK_H_ */ |
