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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/***************************************************************************
* Description: Multi thread portability code for JK *
* Author: Gal Shachor <shachor@il.ibm.com> *
* Version: $Revision: 918711 $ *
***************************************************************************/
#ifndef _JK_MT_H
#define _JK_MT_H
#include "jk_global.h"
#if defined(WIN32)
#define jk_gettid() ((jk_uint32_t)GetCurrentThreadId())
#elif defined(NETWARE) && !defined(__NOVELL_LIBC__)
#define getpid() ((int)GetThreadGroupID())
#endif
#ifdef JK_PREFORK
#define _MT_CODE 0
#else
#define _MT_CODE 1
#endif
/*
* Marks execution under MT compilation
*/
#if _MT_CODE
#ifdef WIN32
#include <windows.h>
typedef CRITICAL_SECTION JK_CRIT_SEC;
#define JK_INIT_CS(x, rc) InitializeCriticalSection(x); rc = JK_TRUE
#define JK_DELETE_CS(x, rc) DeleteCriticalSection(x); rc = JK_TRUE
#define JK_ENTER_CS(x, rc) EnterCriticalSection(x); rc = JK_TRUE
#define JK_LEAVE_CS(x, rc) LeaveCriticalSection(x); rc = JK_TRUE
#else /* !WIN32 */
#define _MT_CODE_PTHREAD
#include <pthread.h>
#include <unistd.h>
#include <fcntl.h>
typedef pthread_mutex_t JK_CRIT_SEC;
#define JK_INIT_CS(x, rc)\
if(pthread_mutex_init(x, NULL)) rc = JK_FALSE; else rc = JK_TRUE
#define JK_DELETE_CS(x, rc)\
if(pthread_mutex_destroy(x)) rc = JK_FALSE; else rc = JK_TRUE
#define JK_ENTER_CS(x, rc)\
if(pthread_mutex_lock(x)) rc = JK_FALSE; else rc = JK_TRUE
#define JK_LEAVE_CS(x, rc)\
if(pthread_mutex_unlock(x)) rc = JK_FALSE; else rc = JK_TRUE
#if defined(AS400) || defined(NETWARE)
#define jk_pthread_t jk_uint32_t
#endif /* AS400 || NETWARE */
jk_pthread_t jk_gettid(void);
#endif /* WIN32 */
#else /* !_MT_CODE */
typedef void *JK_CRIT_SEC;
#define JK_INIT_CS(x, rc) rc = JK_TRUE
#define JK_DELETE_CS(x, rc) rc = JK_TRUE
#define JK_ENTER_CS(x, rc) rc = JK_TRUE
#define JK_LEAVE_CS(x, rc) rc = JK_TRUE
#define jk_gettid() 0
#endif /* MT_CODE */
#if !defined(WIN32) && !defined(NETWARE)
#include <unistd.h>
#include <fcntl.h>
#define USE_FLOCK_LK 0
#if HAVE_FLOCK
#ifdef JK_USE_FLOCK
#define USE_FLOCK_LK 1
#endif
#endif
#if USE_FLOCK_LK
#include <sys/file.h>
#define JK_ENTER_LOCK(x, rc) \
do { \
while ((rc = flock((x), LOCK_EX) < 0) && (errno == EINTR)); \
rc = rc == 0 ? JK_TRUE : JK_FALSE; \
} while (0)
#define JK_LEAVE_LOCK(x, rc) \
do { \
while ((rc = flock((x), LOCK_UN) < 0) && (errno == EINTR)); \
rc = rc == 0 ? JK_TRUE : JK_FALSE; \
} while (0)
#else /* !USE_FLOCK_LK */
#define JK_ENTER_LOCK(x, rc) \
do { \
struct flock _fl; \
_fl.l_type = F_WRLCK; \
_fl.l_whence = SEEK_SET; \
_fl.l_start = 0; \
_fl.l_len = 1L; \
_fl.l_pid = 0; \
while ((rc = fcntl((x), F_SETLKW, &_fl) < 0) && (errno == EINTR)); \
rc = rc == 0 ? JK_TRUE : JK_FALSE; \
} while (0)
#define JK_LEAVE_LOCK(x, rc) \
do { \
struct flock _fl; \
_fl.l_type = F_UNLCK; \
_fl.l_whence = SEEK_SET; \
_fl.l_start = 0; \
_fl.l_len = 1L; \
_fl.l_pid = 0; \
while ((rc = fcntl((x), F_SETLKW, &_fl) < 0) && (errno == EINTR)); \
rc = rc == 0 ? JK_TRUE : JK_FALSE; \
} while (0)
#endif /* USE_FLOCK_LK */
#else /* WIN32 || NETWARE */
#define JK_ENTER_LOCK(x, rc) rc = JK_TRUE
#define JK_LEAVE_LOCK(x, rc) rc = JK_TRUE
#endif
#endif /* _JK_MT_H */
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