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added non-blocking locking, isc_rwlock_trylock()

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This commit is contained in:
David Lawrence
2001-03-08 00:55:15 +00:00
parent 668f06c071
commit a82fd2c01b
2 changed files with 28 additions and 5 deletions
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8
lib/isc/include/isc/rwlock.h
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@@ -15,7 +15,7 @@
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: rwlock.h,v 1.17 2001/01/09 21:57:30 bwelling Exp $ */
/* $Id: rwlock.h,v 1.18 2001/03/08 00:55:15 tale Exp $ */
#ifndef ISC_RWLOCK_H
#define ISC_RWLOCK_H 1
@@ -28,7 +28,8 @@
ISC_LANG_BEGINDECLS
typedef enum {
isc_rwlocktype_read = 0,
isc_rwlocktype_none = 0,
isc_rwlocktype_read,
isc_rwlocktype_write
} isc_rwlocktype_t;
@@ -73,6 +74,9 @@ isc_rwlock_init(isc_rwlock_t *rwl, unsigned int read_quota,
isc_result_t
isc_rwlock_lock(isc_rwlock_t *rwl, isc_rwlocktype_t type);
isc_result_t
isc_rwlock_trylock(isc_rwlock_t *rwl, isc_rwlocktype_t type);
isc_result_t
isc_rwlock_unlock(isc_rwlock_t *rwl, isc_rwlocktype_t type);