mirror of
https://github.com/php/pecl-caching-apc.git
synced 2026-03-23 22:42:11 +01:00
124 lines
3.7 KiB
C
124 lines
3.7 KiB
C
/*
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+----------------------------------------------------------------------+
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| APC |
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+----------------------------------------------------------------------+
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| Copyright (c) 2006-2011 The PHP Group |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.01 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.php.net/license/3_01.txt |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Authors: George Schlossnagle <george@omniti.com> |
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| Rasmus Lerdorf <rasmus@php.net> |
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+----------------------------------------------------------------------+
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This software was contributed to PHP by Community Connect Inc. in 2002
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and revised in 2005 by Yahoo! Inc. to add support for PHP 5.1.
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Future revisions and derivatives of this source code must acknowledge
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Community Connect Inc. as the original contributor of this module by
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leaving this note intact in the source code.
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All other licensing and usage conditions are those of the PHP Group.
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*/
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/* $Id$ */
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#include "apc.h"
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#ifdef APC_FCNTL_LOCKS
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#include "apc_fcntl.h"
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#include <unistd.h>
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#include <fcntl.h>
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int apc_fcntl_create(const char* pathname TSRMLS_DC)
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{
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int fd;
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if(pathname == NULL) {
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char lock_path[] = "/tmp/.apc.XXXXXX";
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mktemp(lock_path);
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fd = open(lock_path, O_RDWR|O_CREAT, 0666);
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if(fd > 0 ) {
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unlink(lock_path);
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return fd;
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} else {
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apc_error("apc_fcntl_create: open(%s, O_RDWR|O_CREAT, 0666) failed:" TSRMLS_CC, lock_path);
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return -1;
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}
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}
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fd = open(pathname, O_RDWR|O_CREAT, 0666);
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if(fd > 0 ) {
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unlink(pathname);
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return fd;
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}
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apc_error("apc_fcntl_create: open(%s, O_RDWR|O_CREAT, 0666) failed:" TSRMLS_CC, pathname);
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return -1;
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}
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void apc_fcntl_destroy(int fd)
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{
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close(fd);
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}
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static int lock_reg(int fd, int cmd, int type, off_t offset, int whence, off_t len)
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{
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int ret;
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struct flock lock;
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lock.l_type = type;
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lock.l_start = offset;
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lock.l_whence = whence;
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lock.l_len = len;
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lock.l_pid = 0;
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do { ret = fcntl(fd, cmd, &lock) ; }
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while(ret < 0 && errno == EINTR);
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return(ret);
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}
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void apc_fcntl_lock(int fd TSRMLS_DC)
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{
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if(lock_reg(fd, F_SETLKW, F_WRLCK, 0, SEEK_SET, 0) < 0) {
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apc_error("apc_fcntl_lock failed:" TSRMLS_CC);
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}
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}
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void apc_fcntl_rdlock(int fd TSRMLS_DC)
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{
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if(lock_reg(fd, F_SETLKW, F_RDLCK, 0, SEEK_SET, 0) < 0) {
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apc_error("apc_fcntl_rdlock failed:" TSRMLS_CC);
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}
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}
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zend_bool apc_fcntl_nonblocking_lock(int fd TSRMLS_DC)
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{
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if(lock_reg(fd, F_SETLK, F_WRLCK, 0, SEEK_SET, 0) < 0) {
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if(errno==EACCES||errno==EAGAIN) return 0;
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else apc_error("apc_fcntl_lock failed:" TSRMLS_CC);
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}
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return 1;
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}
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void apc_fcntl_unlock(int fd TSRMLS_DC)
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{
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if(lock_reg(fd, F_SETLKW, F_UNLCK, 0, SEEK_SET, 0) < 0) {
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apc_error("apc_fcntl_unlock failed:" TSRMLS_CC);
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}
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}
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#endif /* APC_FCNTL_LOCKS */
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/*
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* Local variables:
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* tab-width: 4
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* c-basic-offset: 4
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* End:
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* vim>600: expandtab sw=4 ts=4 sts=4 fdm=marker
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* vim<600: expandtab sw=4 ts=4 sts=4
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*/
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