dispatch-1.0/testing/dispatch_after.c

   1 /*
   2  * Copyright (c) 2008-2009 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_APACHE_LICENSE_HEADER_START@
   5  *
   6  * Licensed under the Apache License, Version 2.0 (the "License");
   7  * you may not use this file except in compliance with the License.
   8  * You may obtain a copy of the License at
   9  *
  10  *     http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  * Unless required by applicable law or agreed to in writing, software
  13  * distributed under the License is distributed on an "AS IS" BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  *
  18  * @APPLE_APACHE_LICENSE_HEADER_END@
  19  */
  20
  21 #include "config/config.h"
  22
  23 #include <dispatch/dispatch.h>
  24 #include <stdio.h>
  25 #include <unistd.h>
  26 #include <stdlib.h>
  27 #include <assert.h>
  28
  29 #include "dispatch_test.h"
  30 #include <Block.h>
  31
  32 void done(void *arg __unused) {
  33     sleep(1);
  34     test_stop();
  35 }
  36
  37 int
  38 main(void)
  39 {
  40     __block dispatch_time_t time_a_min, time_a, time_a_max;
  41     __block dispatch_time_t time_b_min, time_b, time_b_max;
  42     __block dispatch_time_t time_c_min, time_c, time_c_max;
  43
  44
  45         test_start("Dispatch After");
  46
  47     dispatch_async(dispatch_get_main_queue(), ^{
  48             time_a_min = dispatch_time(0,  5.5*NSEC_PER_SEC);
  49             time_a     = dispatch_time(0,   6*NSEC_PER_SEC);
  50             time_a_max = dispatch_time(0,  6.5*NSEC_PER_SEC);
  51             dispatch_after(time_a, dispatch_get_current_queue(), ^{
  52                     dispatch_time_t now_a = dispatch_time(0, 0);
  53                     test_long_less_than("can't finish faster than 5.5s", 0, now_a - time_a_min);
  54                     test_long_less_than("must finish faster than  6.5s", 0, time_a_max - now_a);
  55
  56                     time_b_min = dispatch_time(0,  1.5*NSEC_PER_SEC);
  57                     time_b     = dispatch_time(0,    2*NSEC_PER_SEC);
  58                     time_b_max = dispatch_time(0,  2.5*NSEC_PER_SEC);
  59                     dispatch_after(time_b, dispatch_get_current_queue(), ^{
  60                             dispatch_time_t now_b = dispatch_time(0, 0);
  61                             test_long_less_than("can't finish faster than 1.5s", 0, now_b - time_b_min);
  62                             test_long_less_than("must finish faster than  2.5s", 0, time_b_max - now_b);
  63
  64                             time_c_min = dispatch_time(0,  0*NSEC_PER_SEC);
  65                             time_c     = dispatch_time(0,  0*NSEC_PER_SEC);
  66                             time_c_max = dispatch_time(0,  .5*NSEC_PER_SEC);
  67                             dispatch_after(time_c, dispatch_get_current_queue(), ^{
  68                                     dispatch_time_t now_c = dispatch_time(0, 0);
  69                                     test_long_less_than("can't finish faster than 0s", 0, now_c - time_c_min);
  70                                     test_long_less_than("must finish faster than .5s", 0, time_c_max - now_c);
  71
  72                                     dispatch_async_f(dispatch_get_current_queue(), NULL, done);
  73                                 });
  74                         });
  75                 });
  76         });
  77
  78     dispatch_main();
  79     return 0;
  80 }