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Sweden-Number/server/serial.c

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/*
* Server-side serial port communications management
*
* Copyright (C) 1998 Alexandre Julliard
* Copyright (C) 2000,2001 Mike McCormack
*
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include "wine/port.h"
#include <assert.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/time.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#ifdef HAVE_UTIME_H
#include <utime.h>
#endif
#ifdef HAVE_TERMIOS_H
#include <termios.h>
#endif
#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif
#ifdef HAVE_POLL_H
#include <poll.h>
#endif
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "windef.h"
#include "winternl.h"
#include "file.h"
#include "handle.h"
#include "thread.h"
#include "request.h"
static void serial_dump( struct object *obj, int verbose );
static struct fd *serial_get_fd( struct object *obj );
static void serial_destroy(struct object *obj);
static enum server_fd_type serial_get_fd_type( struct fd *fd );
static void serial_queue_async( struct fd *fd, struct async *async, int type, int count );
static void serial_reselect_async( struct fd *fd, struct async_queue *queue );
struct serial
{
struct object obj;
struct fd *fd;
struct timeout_user *read_timer;
/* timeout values */
unsigned int readinterval;
unsigned int readconst;
unsigned int readmult;
unsigned int writeconst;
unsigned int writemult;
unsigned int eventmask;
unsigned int generation; /* event mask change counter */
unsigned int pending_write : 1;
unsigned int pending_wait : 1;
struct termios original;
/* FIXME: add dcb, comm status, handler module, sharing */
};
static const struct object_ops serial_ops =
{
sizeof(struct serial), /* size */
serial_dump, /* dump */
no_get_type, /* get_type */
add_queue, /* add_queue */
remove_queue, /* remove_queue */
default_fd_signaled, /* signaled */
no_satisfied, /* satisfied */
no_signal, /* signal */
serial_get_fd, /* get_fd */
default_fd_map_access, /* map_access */
default_get_sd, /* get_sd */
default_set_sd, /* set_sd */
no_lookup_name, /* lookup_name */
no_link_name, /* link_name */
NULL, /* unlink_name */
no_open_file, /* open_file */
fd_close_handle, /* close_handle */
serial_destroy /* destroy */
};
static const struct fd_ops serial_fd_ops =
{
default_fd_get_poll_events, /* get_poll_events */
default_poll_event, /* poll_event */
serial_get_fd_type, /* get_fd_type */
no_fd_read, /* read */
no_fd_write, /* write */
no_fd_flush, /* flush */
default_fd_ioctl, /* ioctl */
serial_queue_async, /* queue_async */
serial_reselect_async /* reselect_async */
};
/* check if the given fd is a serial port */
int is_serial_fd( struct fd *fd )
{
struct termios tios;
return !tcgetattr( get_unix_fd(fd), &tios );
}
/* create a serial object for a given fd */
struct object *create_serial( struct fd *fd )
{
struct serial *serial;
if (!(serial = alloc_object( &serial_ops ))) return NULL;
serial->read_timer = NULL;
serial->readinterval = 0;
serial->readmult = 0;
serial->readconst = 0;
serial->writemult = 0;
serial->writeconst = 0;
serial->eventmask = 0;
serial->generation = 0;
serial->pending_write = 0;
serial->pending_wait = 0;
serial->fd = (struct fd *)grab_object( fd );
set_fd_user( fd, &serial_fd_ops, &serial->obj );
return &serial->obj;
}
static struct fd *serial_get_fd( struct object *obj )
{
struct serial *serial = (struct serial *)obj;
return (struct fd *)grab_object( serial->fd );
}
static void serial_destroy( struct object *obj)
{
struct serial *serial = (struct serial *)obj;
if (serial->read_timer) remove_timeout_user( serial->read_timer );
release_object( serial->fd );
}
static void serial_dump( struct object *obj, int verbose )
{
struct serial *serial = (struct serial *)obj;
assert( obj->ops == &serial_ops );
fprintf( stderr, "Port fd=%p mask=%x\n", serial->fd, serial->eventmask );
}
static struct serial *get_serial_obj( struct process *process, obj_handle_t handle, unsigned int access )
{
return (struct serial *)get_handle_obj( process, handle, access, &serial_ops );
}
static enum server_fd_type serial_get_fd_type( struct fd *fd )
{
return FD_TYPE_SERIAL;
}
static void serial_queue_async( struct fd *fd, struct async *async, int type, int count )
{
struct serial *serial = get_fd_user( fd );
timeout_t timeout = 0;
assert(serial->obj.ops == &serial_ops);
switch (type)
{
case ASYNC_TYPE_READ:
timeout = serial->readconst + (timeout_t)serial->readmult*count;
break;
case ASYNC_TYPE_WRITE:
timeout = serial->writeconst + (timeout_t)serial->writemult*count;
break;
}
if ((async = fd_queue_async( fd, async_get_data( async ), NULL, type )))
{
if (timeout) async_set_timeout( async, timeout * -10000, STATUS_TIMEOUT );
release_object( async );
set_error( STATUS_PENDING );
}
}
static void serial_read_timeout( void *arg )
{
struct serial *serial = arg;
serial->read_timer = NULL;
fd_async_wake_up( serial->fd, ASYNC_TYPE_READ, STATUS_TIMEOUT );
}
static void serial_reselect_async( struct fd *fd, struct async_queue *queue )
{
struct serial *serial = get_fd_user( fd );
if (serial->read_timer)
{
if (!(default_fd_get_poll_events( fd ) & POLLIN))
{
remove_timeout_user( serial->read_timer );
serial->read_timer = NULL;
}
}
else if (serial->readinterval && (default_fd_get_poll_events( fd ) & POLLIN))
{
serial->read_timer = add_timeout_user( (timeout_t)serial->readinterval * -10000,
serial_read_timeout, serial );
}
default_fd_reselect_async( fd, queue );
}
DECL_HANDLER(get_serial_info)
{
struct serial *serial;
if ((serial = get_serial_obj( current->process, req->handle, 0 )))
{
if (req->flags & SERIALINFO_PENDING_WAIT)
{
if (serial->pending_wait)
{
release_object( serial );
set_error( STATUS_INVALID_PARAMETER );
return;
}
serial->pending_wait = 1;
}
/* timeouts */
reply->readinterval = serial->readinterval;
reply->readconst = serial->readconst;
reply->readmult = serial->readmult;
reply->writeconst = serial->writeconst;
reply->writemult = serial->writemult;
/* event mask */
reply->eventmask = serial->eventmask;
reply->cookie = serial->generation;
/* pending write */
reply->pending_write = serial->pending_write;
if (req->flags & SERIALINFO_PENDING_WRITE)
serial->pending_write = 0;
release_object( serial );
}
}
DECL_HANDLER(set_serial_info)
{
struct serial *serial;
if ((serial = get_serial_obj( current->process, req->handle, 0 )))
{
if (req->flags & SERIALINFO_PENDING_WAIT)
{
if (!serial->pending_wait)
{
release_object( serial );
set_error( STATUS_INVALID_PARAMETER );
return;
}
serial->pending_wait = 0;
}
/* timeouts */
if (req->flags & SERIALINFO_SET_TIMEOUTS)
{
serial->readinterval = req->readinterval;
serial->readconst = req->readconst;
serial->readmult = req->readmult;
serial->writeconst = req->writeconst;
serial->writemult = req->writemult;
}
/* pending write */
if (req->flags & SERIALINFO_PENDING_WRITE)
serial->pending_write = 1;
/* event mask */
if (req->flags & SERIALINFO_SET_MASK)
{
serial->eventmask = req->eventmask;
serial->generation++;
fd_async_wake_up( serial->fd, ASYNC_TYPE_WAIT, STATUS_SUCCESS );
}
release_object( serial );
}
}
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