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php-src/main/reentrancy.c

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/*
+----------------------------------------------------------------------+
| PHP Version 4 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2003 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 2.02 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available at through the world-wide-web at |
| http://www.php.net/license/2_02.txt. |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: Sascha Schumann <sascha@schumann.cx> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include <sys/types.h>
#include <string.h>
#include <errno.h>
#ifdef HAVE_DIRENT_H
#include <dirent.h>
#endif
#ifdef PHP_WIN32
#include "win32/readdir.h"
#endif
#if defined(NETWARE) && !(NEW_LIBC)
/*#include <ws2nlm.h>*/
#include <sys/socket.h>
#endif
#include "php_reentrancy.h"
#include "ext/standard/php_rand.h" /* for RAND_MAX */
enum {
LOCALTIME_R,
CTIME_R,
ASCTIME_R,
GMTIME_R,
READDIR_R,
NUMBER_OF_LOCKS
};
#if defined(PHP_NEED_REENTRANCY)
#include <TSRM.h>
static MUTEX_T reentrant_locks[NUMBER_OF_LOCKS];
#define local_lock(x) tsrm_mutex_lock(reentrant_locks[x])
#define local_unlock(x) tsrm_mutex_unlock(reentrant_locks[x])
#else
#define local_lock(x)
#define local_unlock(x)
#endif
#if defined(PHP_IRIX_TIME_R)
#define HAVE_CTIME_R 1
#define HAVE_ASCTIME_R 1
PHPAPI char *php_ctime_r(const time_t *clock, char *buf)
{
if (ctime_r(clock, buf, 26) == buf)
return (buf);
return (NULL);
}
PHPAPI char *php_asctime_r(const struct tm *tm, char *buf)
{
if (asctime_r(tm, buf, 26) == buf)
return (buf);
return (NULL);
}
#endif
#if defined(PHP_HPUX_TIME_R)
#define HAVE_LOCALTIME_R 1
#define HAVE_CTIME_R 1
#define HAVE_ASCTIME_R 1
#define HAVE_GMTIME_R 1
PHPAPI struct tm *php_localtime_r(const time_t *const timep, struct tm *p_tm)
{
if (localtime_r(timep, p_tm) == 0)
return (p_tm);
return (NULL);
}
PHPAPI char *php_ctime_r(const time_t *clock, char *buf)
{
if (ctime_r(clock, buf, 26) != -1)
return (buf);
return (NULL);
}
PHPAPI char *php_asctime_r(const struct tm *tm, char *buf)
{
if (asctime_r(tm, buf, 26) != -1)
return (buf);
return (NULL);
}
PHPAPI struct tm *php_gmtime_r(const time_t *const timep, struct tm *p_tm)
{
if (gmtime_r(timep, p_tm) == 0)
return (p_tm);
return (NULL);
}
#endif
#if defined(NETWARE)
/*
Re-entrant versions of functions seem to be better for loading NLMs in different address space.
Since we have them now in LibC, we might as well make use of them.
*/
#define HAVE_LOCALTIME_R 1
#define HAVE_CTIME_R 1
#define HAVE_ASCTIME_R 1
#define HAVE_GMTIME_R 1
PHPAPI struct tm *php_localtime_r(const time_t *const timep, struct tm *p_tm)
{
/* Modified according to LibC definition */
if (localtime_r(timep, p_tm) != NULL)
return (p_tm);
return (NULL);
}
PHPAPI char *php_ctime_r(const time_t *clock, char *buf)
{
/* Modified according to LibC definition */
if (ctime_r(clock, buf) != NULL)
return (buf);
return (NULL);
}
PHPAPI char *php_asctime_r(const struct tm *tm, char *buf)
{
/* Modified according to LibC definition */
if (asctime_r(tm, buf) != NULL)
return (buf);
return (NULL);
}
PHPAPI struct tm *php_gmtime_r(const time_t *const timep, struct tm *p_tm)
{
/* Modified according to LibC definition */
if (gmtime_r(timep, p_tm) != NULL)
return (p_tm);
return (NULL);
}
#endif /* NETWARE */
#if defined(__BEOS__)
PHPAPI struct tm *php_gmtime_r(const time_t *const timep, struct tm *p_tm)
{
/* Modified according to LibC definition */
if (((struct tm*)gmtime_r(timep, p_tm)) == p_tm)
return (p_tm);
return (NULL);
}
#endif /* BEOS */
#if !defined(HAVE_POSIX_READDIR_R)
PHPAPI int php_readdir_r(DIR *dirp, struct dirent *entry,
struct dirent **result)
{
#if defined(HAVE_OLD_READDIR_R)
int ret = 0;
/* We cannot rely on the return value of readdir_r
as it differs between various platforms
(HPUX returns 0 on success whereas Solaris returns non-zero)
*/
entry->d_name[0] = '\0';
readdir_r(dirp, entry);
if (entry->d_name[0] == '\0') {
*result = NULL;
ret = errno;
} else {
*result = entry;
}
return ret;
#else
struct dirent *ptr;
int ret = 0;
local_lock(READDIR_R);
errno = 0;
ptr = readdir(dirp);
if (!ptr && errno != 0)
ret = errno;
if (ptr)
memcpy(entry, ptr, sizeof(*ptr));
*result = ptr;
local_unlock(READDIR_R);
return ret;
#endif
}
#endif
#if !defined(HAVE_LOCALTIME_R) && defined(HAVE_LOCALTIME)
PHPAPI struct tm *php_localtime_r(const time_t *const timep, struct tm *p_tm)
{
struct tm *tmp;
local_lock(LOCALTIME_R);
tmp = localtime(timep);
if (tmp) {
memcpy(p_tm, tmp, sizeof(struct tm));
tmp = p_tm;
}
local_unlock(LOCALTIME_R);
return tmp;
}
#endif
#if !defined(HAVE_CTIME_R) && defined(HAVE_CTIME)
PHPAPI char *php_ctime_r(const time_t *clock, char *buf)
{
char *tmp;
local_lock(CTIME_R);
tmp = ctime(clock);
strcpy(buf, tmp);
local_unlock(CTIME_R);
return buf;
}
#endif
#if !defined(HAVE_ASCTIME_R) && defined(HAVE_ASCTIME)
PHPAPI char *php_asctime_r(const struct tm *tm, char *buf)
{
char *tmp;
local_lock(ASCTIME_R);
tmp = asctime(tm);
strcpy(buf, tmp);
local_unlock(ASCTIME_R);
return buf;
}
#endif
#if !defined(HAVE_GMTIME_R) && defined(HAVE_GMTIME)
PHPAPI struct tm *php_gmtime_r(const time_t *const timep, struct tm *p_tm)
{
struct tm *tmp;
local_lock(GMTIME_R);
tmp = gmtime(timep);
if (tmp) {
memcpy(p_tm, tmp, sizeof(struct tm));
tmp = p_tm;
}
local_unlock(GMTIME_R);
return tmp;
}
#endif
#if defined(PHP_NEED_REENTRANCY)
void reentrancy_startup(void)
{
int i;
for (i = 0; i < NUMBER_OF_LOCKS; i++) {
reentrant_locks[i] = tsrm_mutex_alloc();
}
}
void reentrancy_shutdown(void)
{
int i;
for (i = 0; i < NUMBER_OF_LOCKS; i++) {
tsrm_mutex_free(reentrant_locks[i]);
}
}
#endif
#ifndef HAVE_RAND_R
/*-
* Copyright (c) 1990, 1993
* The Regents of the University of California. 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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.
*
* Posix rand_r function added May 1999 by Wes Peters <wes@softweyr.com>.
*/
#include <sys/types.h>
#include <stdlib.h>
static int
do_rand(unsigned long *ctx)
{
return ((*ctx = *ctx * 1103515245 + 12345) % ((u_long)RAND_MAX + 1));
}
PHPAPI int
php_rand_r(unsigned int *ctx)
{
u_long val = (u_long) *ctx;
*ctx = do_rand(&val);
return (int) *ctx;
}
#endif
#ifndef HAVE_STRTOK_R
/*
* Copyright (c) 1998 Softweyr LLC. All rights reserved.
*
* strtok_r, from Berkeley strtok
* Oct 13, 1998 by Wes Peters <wes@softweyr.com>
*
* Copyright (c) 1988, 1993
* The Regents of the University of California. 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
* notices, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notices, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
*
* This product includes software developed by Softweyr LLC, the
* University of California, Berkeley, and its contributors.
*
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY SOFTWEYR LLC, THE REGENTS 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 SOFTWEYR LLC, 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.
*/
#include <stddef.h>
PHPAPI char *
php_strtok_r(char *s, const char *delim, char **last)
{
char *spanp;
int c, sc;
char *tok;
if (s == NULL && (s = *last) == NULL)
{
return NULL;
}
/*
* Skip (span) leading delimiters (s += strspn(s, delim), sort of).
*/
cont:
c = *s++;
for (spanp = (char *)delim; (sc = *spanp++) != 0; )
{
if (c == sc)
{
goto cont;
}
}
if (c == 0) /* no non-delimiter characters */
{
*last = NULL;
return NULL;
}
tok = s - 1;
/*
* Scan token (scan for delimiters: s += strcspn(s, delim), sort of).
* Note that delim must have one NUL; we stop if we see that, too.
*/
for (;;)
{
c = *s++;
spanp = (char *)delim;
do
{
if ((sc = *spanp++) == c)
{
if (c == 0)
{
s = NULL;
}
else
{
char *w = s - 1;
*w = '\0';
}
*last = s;
return tok;
}
}
while (sc != 0);
}
/* NOTREACHED */
}
#endif
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: sw=4 ts=4 fdm=marker
* vim<600: sw=4 ts=4
*/
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