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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 unsigned int serial_map_access( struct object *obj, unsigned int access );
static void serial_destroy(struct object *obj);
static int serial_get_poll_events( struct fd *fd );
static void serial_poll_event( struct fd *fd, int event );
static enum server_fd_type serial_get_info( struct fd *fd, int *flags );
static void serial_flush( struct fd *fd, struct event **event );
static void serial_queue_async( struct fd *fd, const async_data_t *data, int type, int count );
static void serial_cancel_async( struct fd *fd );
struct serial
{
struct object obj;
struct fd *fd;
unsigned int options;
/* timeout values */
unsigned int readinterval;
unsigned int readconst;
unsigned int readmult;
unsigned int writeconst;
unsigned int writemult;
unsigned int eventmask;
struct termios original;
struct list read_q;
struct list write_q;
struct list wait_q;
/* FIXME: add dcb, comm status, handler module, sharing */
};
static const struct object_ops serial_ops =
{
sizeof(struct serial), /* size */
serial_dump, /* dump */
default_fd_add_queue, /* add_queue */
default_fd_remove_queue, /* remove_queue */
default_fd_signaled, /* signaled */
no_satisfied, /* satisfied */
no_signal, /* signal */
serial_get_fd, /* get_fd */
serial_map_access, /* map_access */
no_lookup_name, /* lookup_name */
no_open_file, /* open_file */
fd_close_handle, /* close_handle */
serial_destroy /* destroy */
};
static const struct fd_ops serial_fd_ops =
{
serial_get_poll_events, /* get_poll_events */
serial_poll_event, /* poll_event */
serial_flush, /* flush */
serial_get_info, /* get_file_info */
serial_queue_async, /* queue_async */
serial_cancel_async /* cancel_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, unsigned int options )
{
struct serial *serial;
int unix_fd = get_unix_fd( fd );
/* set the fd back to blocking if necessary */
if (options & (FILE_SYNCHRONOUS_IO_ALERT | FILE_SYNCHRONOUS_IO_NONALERT))
fcntl( unix_fd, F_SETFL, 0 );
if (!(serial = alloc_object( &serial_ops ))) return NULL;
serial->options = options;
serial->readinterval = 0;
serial->readmult = 0;
serial->readconst = 0;
serial->writemult = 0;
serial->writeconst = 0;
serial->eventmask = 0;
list_init( &serial->read_q );
list_init( &serial->write_q );
list_init( &serial->wait_q );
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 unsigned int serial_map_access( struct object *obj, unsigned int access )
{
if (access & GENERIC_READ) access |= FILE_GENERIC_READ;
if (access & GENERIC_WRITE) access |= FILE_GENERIC_WRITE;
if (access & GENERIC_EXECUTE) access |= FILE_GENERIC_EXECUTE;
if (access & GENERIC_ALL) access |= FILE_ALL_ACCESS;
return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
}
static void serial_destroy( struct object *obj)
{
struct serial *serial = (struct serial *)obj;
async_terminate_queue( &serial->read_q, STATUS_CANCELLED );
async_terminate_queue( &serial->write_q, STATUS_CANCELLED );
async_terminate_queue( &serial->wait_q, STATUS_CANCELLED );
if (serial->fd) 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 int serial_get_poll_events( struct fd *fd )
{
struct serial *serial = get_fd_user( fd );
int events = 0;
assert( serial->obj.ops == &serial_ops );
if (!list_empty( &serial->read_q )) events |= POLLIN;
if (!list_empty( &serial->write_q )) events |= POLLOUT;
if (!list_empty( &serial->wait_q )) events |= POLLIN;
/* fprintf(stderr,"poll events are %04x\n",events); */
return events;
}
static enum server_fd_type serial_get_info( struct fd *fd, int *flags )
{
struct serial *serial = get_fd_user( fd );
assert( serial->obj.ops == &serial_ops );
*flags = 0;
if (!(serial->options & (FILE_SYNCHRONOUS_IO_ALERT | FILE_SYNCHRONOUS_IO_NONALERT)))
*flags |= FD_FLAG_OVERLAPPED;
else if (!(serial->readinterval == MAXDWORD &&
serial->readmult == 0 && serial->readconst == 0))
*flags |= FD_FLAG_TIMEOUT;
if (serial->readinterval == MAXDWORD &&
serial->readmult == 0 && serial->readconst == 0)
*flags |= FD_FLAG_AVAILABLE;
return FD_TYPE_SERIAL;
}
static void serial_poll_event(struct fd *fd, int event)
{
struct serial *serial = get_fd_user( fd );
/* fprintf(stderr,"Poll event %02x\n",event); */
if (!list_empty( &serial->read_q ) && (POLLIN & event) )
async_terminate_head( &serial->read_q, STATUS_ALERTED );
if (!list_empty( &serial->write_q ) && (POLLOUT & event) )
async_terminate_head( &serial->write_q, STATUS_ALERTED );
if (!list_empty( &serial->wait_q ) && (POLLIN & event) )
async_terminate_head( &serial->wait_q, STATUS_ALERTED );
set_fd_events( fd, serial_get_poll_events(fd) );
}
static void serial_queue_async( struct fd *fd, const async_data_t *data, int type, int count )
{
struct serial *serial = get_fd_user( fd );
struct list *queue;
struct timeval when = current_time;
int timeout;
int events;
assert(serial->obj.ops == &serial_ops);
switch (type)
{
case ASYNC_TYPE_READ:
queue = &serial->read_q;
timeout = serial->readconst + serial->readmult*count;
break;
case ASYNC_TYPE_WAIT:
queue = &serial->wait_q;
timeout = 0;
break;
case ASYNC_TYPE_WRITE:
queue = &serial->write_q;
timeout = serial->writeconst + serial->writemult*count;
break;
default:
set_error(STATUS_INVALID_PARAMETER);
return;
}
add_timeout( &when, timeout );
if (!create_async( current, timeout ? &when : NULL, queue, data )) return;
set_error( STATUS_PENDING );
/* Check if the new pending request can be served immediately */
events = check_fd_events( fd, serial_get_poll_events( fd ) );
if (events)
{
/* serial_poll_event() calls set_select_events() */
serial_poll_event( fd, events );
return;
}
set_fd_events( fd, serial_get_poll_events( fd ) );
}
static void serial_cancel_async( struct fd *fd )
{
struct serial *serial = get_fd_user( fd );
assert(serial->obj.ops == &serial_ops);
async_terminate_queue( &serial->read_q, STATUS_CANCELLED );
async_terminate_queue( &serial->write_q, STATUS_CANCELLED );
async_terminate_queue( &serial->wait_q, STATUS_CANCELLED );
}
static void serial_flush( struct fd *fd, struct event **event )
{
/* MSDN says: If hFile is a handle to a communications device,
* the function only flushes the transmit buffer.
*/
if (tcflush( get_unix_fd(fd), TCOFLUSH ) == -1) file_set_error();
}
DECL_HANDLER(get_serial_info)
{
struct serial *serial;
if ((serial = get_serial_obj( current->process, req->handle, 0 )))
{
/* 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;
release_object( serial );
}
}
DECL_HANDLER(set_serial_info)
{
struct serial *serial;
if ((serial = get_serial_obj( current->process, req->handle, 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;
}
/* event mask */
if (req->flags & SERIALINFO_SET_MASK)
{
serial->eventmask = req->eventmask;
if (!serial->eventmask)
{
async_terminate_queue( &serial->wait_q, STATUS_SUCCESS );
}
}
release_object( serial );
}
}
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