mirror of
https://github.com/MariaDB/server.git
synced 2025-01-17 04:22:27 +01:00
134 lines
3.5 KiB
C
134 lines
3.5 KiB
C
/* Copyright (c) 2000, 2011, Oracle and/or its affiliates
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; version 2 of the License.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
|
|
|
|
/* thread safe version of some common functions */
|
|
|
|
#include "mysys_priv.h"
|
|
#include <m_string.h>
|
|
|
|
/* for thread safe my_inet_ntoa */
|
|
#if !defined(__WIN__)
|
|
#include <netdb.h>
|
|
#ifdef HAVE_SYS_SOCKET_H
|
|
#include <sys/socket.h>
|
|
#endif
|
|
#ifdef HAVE_NETINET_IN_H
|
|
#include <netinet/in.h>
|
|
#endif
|
|
#ifdef HAVE_ARPA_INET_H
|
|
#include <arpa/inet.h>
|
|
#endif
|
|
#endif /* !defined(__WIN__) */
|
|
#include "my_net.h"
|
|
|
|
|
|
void my_inet_ntoa(struct in_addr in, char *buf)
|
|
{
|
|
char *ptr;
|
|
pthread_mutex_lock(&THR_LOCK_net);
|
|
ptr=inet_ntoa(in);
|
|
strmov(buf,ptr);
|
|
pthread_mutex_unlock(&THR_LOCK_net);
|
|
}
|
|
|
|
/* This code is not needed if my_gethostbyname_r is a macro */
|
|
#if !defined(my_gethostbyname_r)
|
|
|
|
/*
|
|
Emulate SOLARIS style calls, not because it's better, but just to make the
|
|
usage of getbostbyname_r simpler.
|
|
*/
|
|
|
|
#if defined(HAVE_GETHOSTBYNAME_R)
|
|
|
|
#if defined(HAVE_GETHOSTBYNAME_R_GLIBC2_STYLE)
|
|
|
|
struct hostent *my_gethostbyname_r(const char *name,
|
|
struct hostent *result, char *buffer,
|
|
int buflen, int *h_errnop)
|
|
{
|
|
struct hostent *hp;
|
|
DBUG_ASSERT((size_t) buflen >= sizeof(*result));
|
|
if (gethostbyname_r(name,result, buffer, (size_t) buflen, &hp, h_errnop))
|
|
return 0;
|
|
return hp;
|
|
}
|
|
|
|
#elif defined(HAVE_GETHOSTBYNAME_R_RETURN_INT)
|
|
|
|
struct hostent *my_gethostbyname_r(const char *name,
|
|
struct hostent *result, char *buffer,
|
|
int buflen, int *h_errnop)
|
|
{
|
|
if (gethostbyname_r(name,result,(struct hostent_data *) buffer) == -1)
|
|
{
|
|
*h_errnop= errno;
|
|
return 0;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
#else
|
|
|
|
/* gethostbyname_r with similar interface as gethostbyname() */
|
|
|
|
struct hostent *my_gethostbyname_r(const char *name,
|
|
struct hostent *result, char *buffer,
|
|
int buflen, int *h_errnop)
|
|
{
|
|
struct hostent *hp;
|
|
DBUG_ASSERT(buflen >= sizeof(struct hostent_data));
|
|
hp= gethostbyname_r(name,result,(struct hostent_data *) buffer);
|
|
*h_errnop= errno;
|
|
return hp;
|
|
}
|
|
#endif /* GLIBC2_STYLE_GETHOSTBYNAME_R */
|
|
|
|
#else /* !HAVE_GETHOSTBYNAME_R */
|
|
|
|
#ifdef THREAD
|
|
extern pthread_mutex_t LOCK_gethostbyname_r;
|
|
#endif
|
|
|
|
/*
|
|
No gethostbyname_r() function exists.
|
|
In this case we have to keep a mutex over the call to ensure that no
|
|
other thread is going to reuse the internal memory.
|
|
|
|
The user is responsible to call my_gethostbyname_r_free() when he
|
|
is finished with the structure.
|
|
*/
|
|
|
|
struct hostent *
|
|
my_gethostbyname_r(const char *name,
|
|
struct hostent *result __attribute__((unused)),
|
|
char *buffer __attribute__((unused)),
|
|
int buflen __attribute__((unused)),
|
|
int *h_errnop)
|
|
{
|
|
struct hostent *hp;
|
|
pthread_mutex_lock(&LOCK_gethostbyname_r);
|
|
hp= gethostbyname(name);
|
|
*h_errnop= h_errno;
|
|
return hp;
|
|
}
|
|
|
|
void my_gethostbyname_r_free()
|
|
{
|
|
pthread_mutex_unlock(&LOCK_gethostbyname_r);
|
|
}
|
|
|
|
#endif /* !HAVE_GETHOSTBYNAME_R */
|
|
#endif /* !my_gethostbyname_r */
|