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/*
* Server-side pipe management
*
* Copyright (C) 1998 Alexandre Julliard
*
* This library 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.
*
* This library 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 library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include <assert.h>
#include <fcntl.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_SYS_ERRNO_H
#include <sys/errno.h>
#endif
#include <sys/time.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#include "winbase.h"
#include "handle.h"
#include "thread.h"
#include "request.h"
enum side { READ_SIDE, WRITE_SIDE };
struct pipe
{
struct object obj; /* object header */
struct pipe *other; /* the pipe other end */
enum side side; /* which side of the pipe is this */
};
static void pipe_dump( struct object *obj, int verbose );
static int pipe_get_poll_events( struct object *obj );
static int pipe_get_fd( struct object *obj );
static int pipe_get_info( struct object *obj, struct get_file_info_reply *reply, int *flags );
static void pipe_destroy( struct object *obj );
static const struct object_ops pipe_ops =
{
sizeof(struct pipe), /* size */
pipe_dump, /* dump */
default_poll_add_queue, /* add_queue */
default_poll_remove_queue, /* remove_queue */
default_poll_signaled, /* signaled */
no_satisfied, /* satisfied */
pipe_get_poll_events, /* get_poll_events */
default_poll_event, /* poll_event */
pipe_get_fd, /* get_fd */
no_flush, /* flush */
pipe_get_info, /* get_file_info */
NULL, /* queue_async */
pipe_destroy /* destroy */
};
static struct pipe *create_pipe_side( int fd, int side )
{
struct pipe *pipe;
if ((pipe = alloc_object( &pipe_ops, fd )))
{
pipe->other = NULL;
pipe->side = side;
}
return pipe;
}
static int create_pipe( struct object *obj[2] )
{
struct pipe *read_pipe;
struct pipe *write_pipe;
int fd[2];
if (pipe( fd ) == -1)
{
file_set_error();
return 0;
}
if ((read_pipe = create_pipe_side( fd[0], READ_SIDE )))
{
if ((write_pipe = create_pipe_side( fd[1], WRITE_SIDE )))
{
write_pipe->other = read_pipe;
read_pipe->other = write_pipe;
obj[0] = &read_pipe->obj;
obj[1] = &write_pipe->obj;
return 1;
}
release_object( read_pipe );
}
else close( fd[1] );
return 0;
}
static void pipe_dump( struct object *obj, int verbose )
{
struct pipe *pipe = (struct pipe *)obj;
assert( obj->ops == &pipe_ops );
fprintf( stderr, "Pipe %s-side fd=%d\n",
(pipe->side == READ_SIDE) ? "read" : "write", pipe->obj.fd );
}
static int pipe_get_poll_events( struct object *obj )
{
struct pipe *pipe = (struct pipe *)obj;
assert( obj->ops == &pipe_ops );
return (pipe->side == READ_SIDE) ? POLLIN : POLLOUT;
}
static int pipe_get_fd( struct object *obj )
{
struct pipe *pipe = (struct pipe *)obj;
assert( obj->ops == &pipe_ops );
if (!pipe->other)
{
set_error( STATUS_PIPE_BROKEN );
return -1;
}
return pipe->obj.fd;
}
static int pipe_get_info( struct object *obj, struct get_file_info_reply *reply, int *flags )
{
if (reply)
{
reply->type = FILE_TYPE_PIPE;
reply->attr = 0;
reply->access_time = 0;
reply->write_time = 0;
reply->size_high = 0;
reply->size_low = 0;
reply->links = 0;
reply->index_high = 0;
reply->index_low = 0;
reply->serial = 0;
}
*flags = 0;
return FD_TYPE_DEFAULT;
}
static void pipe_destroy( struct object *obj )
{
struct pipe *pipe = (struct pipe *)obj;
assert( obj->ops == &pipe_ops );
if (pipe->other) pipe->other->other = NULL;
}
/* create an anonymous pipe */
DECL_HANDLER(create_pipe)
{
struct object *obj[2];
handle_t hread = 0, hwrite = 0;
if (create_pipe( obj ))
{
hread = alloc_handle( current->process, obj[0],
STANDARD_RIGHTS_REQUIRED|SYNCHRONIZE|GENERIC_READ,
req->inherit );
if (hread)
{
hwrite = alloc_handle( current->process, obj[1],
STANDARD_RIGHTS_REQUIRED|SYNCHRONIZE|GENERIC_WRITE,
req->inherit );
if (!hwrite) close_handle( current->process, hread, NULL );
}
release_object( obj[0] );
release_object( obj[1] );
}
reply->handle_read = hread;
reply->handle_write = hwrite;
}
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