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/* ath-pth.c - Pth module for self-adapting thread-safeness library
Copyright (C) 2002, 2003, 2004 g10 Code GmbH
This file is part of GPGME.
GPGME is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of
the License, or (at your option) any later version.
GPGME 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser 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. */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <errno.h>
#include <pth.h>
#include "ath.h"
/* The lock we take while checking for lazy lock initialization. */
static pth_mutex_t check_init_lock = PTH_MUTEX_INIT;
/* Initialize the mutex *PRIV. If JUST_CHECK is true, only do this if
it is not already initialized. */
static int
mutex_pth_init (ath_mutex_t *priv, int just_check)
{
int err = 0;
if (just_check)
pth_mutex_acquire (&check_init_lock, 0, NULL);
if (!*priv || !just_check)
{
pth_mutex_t *lock = malloc (sizeof (pth_mutex_t));
if (!lock)
err = ENOMEM;
if (!err)
{
err = pth_mutex_init (lock);
if (err == FALSE)
err = errno;
else
err = 0;
if (err)
free (lock);
else
*priv = (ath_mutex_t) lock;
}
}
if (just_check)
pth_mutex_release (&check_init_lock);
return err;
}
void
ath_init (void)
{
/* Nothing to do. */
}
int
ath_mutex_init (ath_mutex_t *lock)
{
return mutex_pth_init (lock, 0);
}
int
ath_mutex_destroy (ath_mutex_t *lock)
{
int err = mutex_pth_init (lock, 1);
if (!err)
{
/* GNU Pth has no destructor function. */
free (*lock);
}
return err;
}
int
ath_mutex_lock (ath_mutex_t *lock)
{
int ret = mutex_pth_init (lock, 1);
if (ret)
return ret;
ret = pth_mutex_acquire ((pth_mutex_t *) *lock, 0, NULL);
return ret == FALSE ? errno : 0;
}
int
ath_mutex_unlock (ath_mutex_t *lock)
{
int ret = mutex_pth_init (lock, 1);
if (ret)
return ret;
ret = pth_mutex_release ((pth_mutex_t *) *lock);
return ret == FALSE ? errno : 0;
}
ssize_t
ath_read (int fd, void *buf, size_t nbytes)
{
return pth_read (fd, buf, nbytes);
}
ssize_t
ath_write (int fd, const void *buf, size_t nbytes)
{
return pth_write (fd, buf, nbytes);
}
ssize_t
ath_select (int nfd, fd_set *rset, fd_set *wset, fd_set *eset,
struct timeval *timeout)
{
return pth_select (nfd, rset, wset, eset, timeout);
}
ssize_t
ath_waitpid (pid_t pid, int *status, int options)
{
return pth_waitpid (pid, status, options);
}
int
ath_accept (int s, struct sockaddr *addr, socklen_t *length_ptr)
{
return pth_accept (s, addr, length_ptr);
}
int
ath_connect (int s, const struct sockaddr *addr, socklen_t length)
{
return pth_connect (s, addr, length);
}
int
ath_sendmsg (int s, const struct msghdr *msg, int flags)
{
/* FIXME: GNU Pth is missing pth_sendmsg. */
return sendmsg (s, msg, flags);
}
int
ath_recvmsg (int s, struct msghdr *msg, int flags)
{
/* FIXME: GNU Pth is missing pth_recvmsg. */
return recvmsg (s, msg, flags);
}
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