/* * Copyright (c) 2008 Apple Inc. All rights reserved. * * @APPLE_DTS_LICENSE_HEADER_START@ * * IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc. * ("Apple") in consideration of your agreement to the following terms, and your * use, installation, modification or redistribution of this Apple software * constitutes acceptance of these terms. If you do not agree with these terms, * please do not use, install, modify or redistribute this Apple software. * * In consideration of your agreement to abide by the following terms, and * subject to these terms, Apple grants you a personal, non-exclusive license, * under Apple's copyrights in this original Apple software (the "Apple Software"), * to use, reproduce, modify and redistribute the Apple Software, with or without * modifications, in source and/or binary forms; provided that if you redistribute * the Apple Software in its entirety and without modifications, you must retain * this notice and the following text and disclaimers in all such redistributions * of the Apple Software. Neither the name, trademarks, service marks or logos of * Apple Computer, Inc. may be used to endorse or promote products derived from * the Apple Software without specific prior written permission from Apple. Except * as expressly stated in this notice, no other rights or licenses, express or * implied, are granted by Apple herein, including but not limited to any patent * rights that may be infringed by your derivative works or by other works in * which the Apple Software may be incorporated. * * The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO * WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED * WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN * COMBINATION WITH YOUR PRODUCTS. * * IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR * DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF * CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF * APPLE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * @APPLE_DTS_LICENSE_HEADER_END@ */ #include <assert.h> #include <stdio.h> #include <string.h> #include <stdlib.h> #include <sys/errno.h> #include <mach/clock_types.h> #include <dispatch/dispatch.h> int main(int argc, char* argv[]) { dispatch_source_t theTimer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, dispatch_queue_create("timer queue",NULL)); __block int i = 0; printf("Starting to count by seconds\n"); dispatch_source_set_event_handler(theTimer, ^{ printf("%d\n", ++i); if (i >= 6) { printf("i>6\n"); dispatch_source_cancel(theTimer); } if (i == 3) { printf("switching to half seconds\n"); dispatch_source_set_timer(theTimer, DISPATCH_TIME_NOW, NSEC_PER_SEC / 2, 0); } }); dispatch_source_set_cancel_handler(theTimer, ^{ printf("dispatch source canceled OK\n"); dispatch_release(theTimer); exit(0); }); dispatch_source_set_timer(theTimer, dispatch_time(DISPATCH_TIME_NOW,NSEC_PER_SEC) , NSEC_PER_SEC, 0); dispatch_resume(theTimer); dispatch_main(); return 0; }