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/*
* Waitable timers management
*
* Copyright (C) 1999 Alexandre Julliard
*/
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include <sys/types.h>
#include "winerror.h"
#include "handle.h"
#include "request.h"
/* FIXME: check values and move to standard header */
#define TIMER_MODIFY_STATE 0x0001
#define TIMER_QUERY_STATE 0x0002
#define TIMER_ALL_ACCESS (STANDARD_RIGHTS_REQUIRED|SYNCHRONIZE|0x3)
struct timer
{
struct object obj; /* object header */
int manual; /* manual reset */
int signaled; /* current signaled state */
int period; /* timer period in ms */
struct timeval when; /* next expiration */
struct timeout_user *timeout; /* timeout user */
void *callback; /* callback APC function */
void *arg; /* callback argument */
};
static void timer_dump( struct object *obj, int verbose );
static int timer_signaled( struct object *obj, struct thread *thread );
static int timer_satisfied( struct object *obj, struct thread *thread );
static void timer_destroy( struct object *obj );
static const struct object_ops timer_ops =
{
sizeof(struct timer), /* size */
timer_dump, /* dump */
add_queue, /* add_queue */
remove_queue, /* remove_queue */
timer_signaled, /* signaled */
timer_satisfied, /* satisfied */
NULL, /* get_poll_events */
NULL, /* poll_event */
no_read_fd, /* get_read_fd */
no_write_fd, /* get_write_fd */
no_flush, /* flush */
no_get_file_info, /* get_file_info */
timer_destroy /* destroy */
};
/* create a timer object */
static struct timer *create_timer( const WCHAR *name, size_t len, int manual )
{
struct timer *timer;
if ((timer = create_named_object( &timer_ops, name, len )))
{
if (get_error() != ERROR_ALREADY_EXISTS)
{
/* initialize it if it didn't already exist */
timer->manual = manual;
timer->signaled = 0;
timer->when.tv_sec = 0;
timer->when.tv_usec = 0;
timer->period = 0;
timer->timeout = NULL;
}
}
return timer;
}
/* callback on timer expiration */
static void timer_callback( void *private )
{
struct timer *timer = (struct timer *)private;
if (timer->period) /* schedule the next expiration */
{
add_timeout( &timer->when, timer->period );
timer->timeout = add_timeout_user( &timer->when, timer_callback, timer );
}
else timer->timeout = NULL;
/* wake up waiters */
timer->signaled = 1;
wake_up( &timer->obj, 0 );
}
/* set the timer expiration and period */
static void set_timer( struct timer *timer, int sec, int usec, int period,
void *callback, void *arg )
{
if (timer->manual)
{
period = 0; /* period doesn't make any sense for a manual timer */
timer->signaled = 0;
}
if (timer->timeout) remove_timeout_user( timer->timeout );
if (!sec && !usec)
{
/* special case: use now + period as first expiration */
gettimeofday( &timer->when, 0 );
add_timeout( &timer->when, period );
}
else
{
timer->when.tv_sec = sec;
timer->when.tv_usec = usec;
}
timer->period = period;
timer->callback = callback;
timer->arg = arg;
timer->timeout = add_timeout_user( &timer->when, timer_callback, timer );
}
/* cancel a running timer */
static void cancel_timer( struct timer *timer )
{
if (timer->timeout)
{
remove_timeout_user( timer->timeout );
timer->timeout = NULL;
}
}
static void timer_dump( struct object *obj, int verbose )
{
struct timer *timer = (struct timer *)obj;
assert( obj->ops == &timer_ops );
fprintf( stderr, "Timer manual=%d when=%ld.%06ld period=%d ",
timer->manual, timer->when.tv_sec, timer->when.tv_usec, timer->period );
dump_object_name( &timer->obj );
fputc( '\n', stderr );
}
static int timer_signaled( struct object *obj, struct thread *thread )
{
struct timer *timer = (struct timer *)obj;
assert( obj->ops == &timer_ops );
return timer->signaled;
}
static int timer_satisfied( struct object *obj, struct thread *thread )
{
struct timer *timer = (struct timer *)obj;
assert( obj->ops == &timer_ops );
if (!timer->manual) timer->signaled = 0;
return 0;
}
static void timer_destroy( struct object *obj )
{
struct timer *timer = (struct timer *)obj;
assert( obj->ops == &timer_ops );
if (timer->timeout) remove_timeout_user( timer->timeout );
}
/* create a timer */
DECL_HANDLER(create_timer)
{
size_t len = get_req_strlenW( req->name );
struct timer *timer;
req->handle = -1;
if ((timer = create_timer( req->name, len, req->manual )))
{
req->handle = alloc_handle( current->process, timer, TIMER_ALL_ACCESS, req->inherit );
release_object( timer );
}
}
/* open a handle to a timer */
DECL_HANDLER(open_timer)
{
size_t len = get_req_strlenW( req->name );
req->handle = open_object( req->name, len, &timer_ops, req->access, req->inherit );
}
/* set a waitable timer */
DECL_HANDLER(set_timer)
{
struct timer *timer;
if ((timer = (struct timer *)get_handle_obj( current->process, req->handle,
TIMER_MODIFY_STATE, &timer_ops )))
{
set_timer( timer, req->sec, req->usec, req->period, req->callback, req->arg );
release_object( timer );
}
}
/* cancel a waitable timer */
DECL_HANDLER(cancel_timer)
{
struct timer *timer;
if ((timer = (struct timer *)get_handle_obj( current->process, req->handle,
TIMER_MODIFY_STATE, &timer_ops )))
{
cancel_timer( timer );
release_object( timer );
}
}
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