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1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // This file provides a macro ONLY for use in testing. | 5 // This file provides a macro ONLY for use in testing. |
6 // DO NOT USE IN PRODUCTION CODE. There are much better ways to wait. | 6 // DO NOT USE IN PRODUCTION CODE. There are much better ways to wait. |
7 | 7 |
8 // This code is very helpful in testing multi-threaded code, without depending | 8 // This code is very helpful in testing multi-threaded code, without depending |
9 // on almost any primitives. This is especially helpful if you are testing | 9 // on almost any primitives. This is especially helpful if you are testing |
10 // those primitive multi-threaded constructs. | 10 // those primitive multi-threaded constructs. |
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30 // typically used to get the padding needed on a given test platform to assure | 30 // typically used to get the padding needed on a given test platform to assure |
31 // that the test passes, even if load varies, and external events vary. | 31 // that the test passes, even if load varies, and external events vary. |
32 | 32 |
33 #define SPIN_FOR_1_SECOND_OR_UNTIL_TRUE(expression) \ | 33 #define SPIN_FOR_1_SECOND_OR_UNTIL_TRUE(expression) \ |
34 SPIN_FOR_TIMEDELTA_OR_UNTIL_TRUE(base::TimeDelta::FromSeconds(1), \ | 34 SPIN_FOR_TIMEDELTA_OR_UNTIL_TRUE(base::TimeDelta::FromSeconds(1), \ |
35 (expression)) | 35 (expression)) |
36 | 36 |
37 #define SPIN_FOR_TIMEDELTA_OR_UNTIL_TRUE(delta, expression) do { \ | 37 #define SPIN_FOR_TIMEDELTA_OR_UNTIL_TRUE(delta, expression) do { \ |
38 base::Time start = base::Time::Now(); \ | 38 base::Time start = base::Time::Now(); \ |
39 const base::TimeDelta kTimeout = delta; \ | 39 const base::TimeDelta kTimeout = delta; \ |
40 while(!(expression)) { \ | 40 while (!(expression)) { \ |
41 if (kTimeout < base::Time::Now() - start) { \ | 41 if (kTimeout < base::Time::Now() - start) { \ |
42 EXPECT_LE((base::Time::Now() - start).InMilliseconds(), \ | 42 EXPECT_LE((base::Time::Now() - start).InMilliseconds(), \ |
43 kTimeout.InMilliseconds()) << "Timed out"; \ | 43 kTimeout.InMilliseconds()) << "Timed out"; \ |
44 break; \ | 44 break; \ |
45 } \ | 45 } \ |
46 PlatformThread::Sleep(50); \ | 46 PlatformThread::Sleep(50); \ |
47 } \ | 47 } \ |
48 } \ | 48 } while (0) |
49 while(0) | |
50 | 49 |
51 #endif // BASE_SPIN_WAIT_H__ | 50 #endif // BASE_SPIN_WAIT_H__ |
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