transmission/libtransmission/timer.c

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/*
* This file Copyright (C) 2007 Charles Kerr <charles@rebelbase.com>
*
* This file is licensed by the GPL version 2. Works owned by the
* Transmission project are granted a special exemption to clause 2(b)
* so that the bulk of its code can remain under the MIT license.
* This exemption does not extend to derived works not owned by
* the Transmission project.
*
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* $Id$
*/
#include <assert.h>
#include <sys/types.h> /* u_char for event.h */
#include <event.h>
#include "transmission.h"
#include "trevent.h"
#include "timer.h"
#include "utils.h"
typedef int tr_timer_func ( void * user_data );
typedef void tr_data_free_func( void * user_data );
/***
****
***/
struct timer_node
{
tr_handle_t * handle;
struct event * event;
tr_timer_func * func;
void * user_data;
tr_data_free_func * free_func;
struct timeval tv;
uint8_t doFree;
};
void
tr_timerFree( struct timer_node ** node )
{
if( *node )
{
(*node)->doFree = 1;
*node = NULL;
}
}
static void
timerCB( int fd UNUSED, short event UNUSED, void * arg )
{
struct timer_node * node = (struct timer_node *) arg;
if( !node->doFree )
node->doFree = !(node->func)(node->user_data);
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if( !node->doFree )
tr_event_add( node->handle, node->event, &node->tv );
else {
if( node->free_func != NULL )
(node->free_func)( node->user_data );
tr_event_del( node->handle, node->event );
tr_free( node );
}
}
tr_timer_tag
tr_timerNew( tr_handle_t * handle,
tr_timer_func func,
void * user_data,
tr_data_free_func free_func,
int timeout_milliseconds )
{
struct timer_node * node;
assert( func != NULL );
assert( timeout_milliseconds >= 0 );
node = tr_new( struct timer_node, 1 );
node->handle = handle;
node->event = tr_new0( struct event, 1 );
node->func = func;
node->user_data = user_data;
node->free_func = free_func;
node->doFree = 0;
node->tv = timevalMsec ( timeout_milliseconds );
timeout_set( node->event, timerCB, node );
tr_event_add( handle, node->event, &node->tv );
return node;
}