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/* javanio.c -- implementations of functions in javanio.h.

   Copyright (C) 2006  Free Software Foundation, Inc.

This file is a part of GNU Classpath.

GNU Classpath 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; either version 2 of the License, or (at

your option) any later version.

GNU Classpath 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 GNU Classpath; if not, write to the Free Software

Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301

USA

Linking this library statically or dynamically with other modules is

making a combined work based on this library.  Thus, the terms and

conditions of the GNU General Public License cover the whole

combination.

As a special exception, the copyright holders of this library give you

permission to link this library with independent modules to produce an

executable, regardless of the license terms of these independent

modules, and to copy and distribute the resulting executable under

terms of your choice, provided that you also meet, for each linked

independent module, the terms and conditions of the license of that

module.  An independent module is a module which is not derived from

or based on this library.  If you modify this library, you may extend

this exception to your version of the library, but you are not

obligated to do so.  If you do not wish to do so, delete this

exception statement from your version.  */

/*

 * Note, because these functions are trivial, and should be inlined,

 * we include this file in the header, and do not compile it.

 */

#include <fcntl.h>

#include <unistd.h>

#include <sys/types.h>

#include <sys/socket.h>

#ifdef HAVE_SYS_SELECT_H

#include <sys/select.h>

#endif

#include <sys/uio.h>

CPNIO_EXPORT ssize_t

cpnio_read (int fd, void *buf, size_t nbytes)

{

  return read (fd, buf, nbytes);

}

CPNIO_EXPORT ssize_t

cpnio_readv (int fd, const struct iovec *iov, int iovcnt)

{

  return readv (fd, iov, iovcnt);

}

CPNIO_EXPORT ssize_t

cpnio_write (int fd, const void *buf, size_t nbytes)

{

  return write (fd, buf, nbytes);

}

CPNIO_EXPORT ssize_t

cpnio_writev (int fd, const struct iovec *iov, size_t iovcnt)

{

  return writev (fd, iov, iovcnt);

}

CPNIO_EXPORT int

cpnio_socket (int domain, int type, int protocol)

{

  return socket (domain, type, protocol);

}

CPNIO_EXPORT int

cpnio_connect (int fd, const struct sockaddr *addr, socklen_t addrlen)

{

  return connect (fd, addr, addrlen);

}

CPNIO_EXPORT int

cpnio_accept (int fd, struct sockaddr *addr, socklen_t *addrlen)

{

  fd_set rset;

  struct timeval tv;

  socklen_t tvlen = sizeof(tv);

  int ret;

  tv.tv_sec = 0;

  tv.tv_usec = 0;

  getsockopt (fd, SOL_SOCKET, SO_RCVTIMEO, &tv, &tvlen);

  if (tv.tv_sec > 0 || tv.tv_usec > 0)

    {

      FD_ZERO(&rset);

      FD_SET(fd,&rset);

      ret = select (fd+1,&rset,NULL,NULL,&tv);

      if (ret == 0)

        {

          errno = EAGAIN;

          return -1;

        }

    }

  return accept (fd, addr, addrlen);

}

CPNIO_EXPORT ssize_t

cpnio_sendto (int fd, const void *msg, size_t len, int flags,

              const struct sockaddr *to, socklen_t tolen)

{

  return sendto (fd, msg, len, flags, to, tolen);

}

CPNIO_EXPORT ssize_t

cpnio_recvfrom (int fd, void *buf, size_t len, int flags,

                struct sockaddr *from, socklen_t *fromlen)

{

  return recvfrom (fd, buf, len, flags, from, fromlen);

}

CPNIO_EXPORT int

cpnio_fcntl (int fd, int cmd, long arg)

{

#ifdef HAVE_FCNTL

  return fcntl (fd, cmd, arg);

#else

  errno = ENOSUP;

  return -1;

#endif /* HAVE_FCNTL */

}

CPNIO_EXPORT int

cpnio_select (int nfds, fd_set *readfds, fd_set *writefds,

              fd_set *excepfds, struct timeval *timeo)

{

  return select (nfds, readfds, writefds, excepfds, timeo);

}