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/*
* $Id: mrwlock.h,v 1.2 2005/11/20 17:43:54 bestorga-oss Exp $
*
* (C) Copyright IBM Corp. 2003
*
* THIS FILE IS PROVIDED UNDER THE TERMS OF THE ECLIPSE PUBLIC LICENSE
* ("AGREEMENT"). ANY USE, REPRODUCTION OR DISTRIBUTION OF THIS FILE
* CONSTITUTES RECIPIENTS ACCEPTANCE OF THE AGREEMENT.
*
* You can obtain a current copy of the Eclipse Public License from
* http://www.opensource.org/licenses/eclipse-1.0.php
*
* Author: Viktor Mihajlovski <mihajlov@de.ibm.cim>
* Contributors:
*
* Description: Multiple Reader/Single Writer Lock
* This module facilitates scalable multiple reader single writer
* processing paradigms.
*
*/
#ifndef MRWLOCK_H
#define MRWLOCK_H
#ifdef __cplusplus
extern "C" {
#endif
#include <pthread.h>
typedef struct _MRWLOCK {
pthread_mutex_t mrw_mutex;
pthread_cond_t mrw_cond;
unsigned mrw_rnum;
} MRWLOCK;
/*
* Macro for stativ MRW Lock Definition
*/
#define MRWLOCK_DEFINE(n) MRWLOCK n={PTHREAD_MUTEX_INITIALIZER, \
PTHREAD_COND_INITIALIZER, \
0}
extern int MRWInit(MRWLOCK * mrwl);
extern int MRWTerm(MRWLOCK * mrwl);
extern int MReadLock(MRWLOCK * mrwl);
extern int MReadUnlock(MRWLOCK * mrwl);
extern int MWriteLock(MRWLOCK * mrwl);
extern int MWriteUnlock(MRWLOCK * mrwl);
#ifdef __cplusplus
}
#endif
#endif
/* MODELINES */
/* DO NOT EDIT BELOW THIS COMMENT */
/* Modelines are added by 'make pretty' */
/* -*- Mode: C; c-basic-offset: 2; indent-tabs-mode: nil; -*- */
/* vi:set ts=2 sts=2 sw=2 expandtab: */
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