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netsurf/cocoa/schedule.m

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/*
* Copyright 2011 Sven Weidauer <sven.weidauer@gmail.com>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
* NetSurf is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* NetSurf 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#import <Cocoa/Cocoa.h>
#import "utils/errors.h"
#import "cocoa/schedule.h"
@interface ScheduledCallback : NSObject {
void (*callback)( void *userData );
void *userData;
}
- initWithCallback: (void (*)(void *))cb userData: (void *)ud;
- (void) schedule: (NSTimeInterval) ti;
@end
@implementation ScheduledCallback
- initWithCallback: (void (*)(void *))cb userData: (void *)ud;
{
callback = cb;
userData = ud;
return self;
}
static NSMutableSet *timerSet = nil;
- (void) schedule: (NSTimeInterval) ti;
{
if (nil == timerSet) {
timerSet = [[NSMutableSet alloc] init];
}
[self performSelector: @selector(timerFired) withObject: nil afterDelay: ti];
[timerSet addObject: self];
}
- (void) timerFired;
{
if ([timerSet containsObject: self]) {
[timerSet removeObject: self];
callback( userData );
}
}
- (BOOL) isEqual: (id)object
{
if (object == self) return YES;
if ([object class] != [self class]) return NO;
return ((ScheduledCallback *)object)->callback == callback && ((ScheduledCallback *)object)->userData == userData;
}
- (NSUInteger) hash;
{
return (NSUInteger)callback + (NSUInteger)userData;
}
@end
/* exported interface documented in cocoa/schedule.h */
nserror cocoa_schedule(int t, void (*callback)(void *p), void *p)
{
ScheduledCallback *cb = [[ScheduledCallback alloc] initWithCallback: callback userData: p];
[timerSet removeObject: cb];
if (t >= 0) {
[cb schedule: (NSTimeInterval)t / 1000];
}
[cb release];
return NSERROR_OK;
}