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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 #include "base/waitable_event.h" | 5 #include "base/waitable_event.h" |
6 | 6 |
7 #include <math.h> | 7 #include <math.h> |
8 #include <windows.h> | 8 #include <windows.h> |
9 | 9 |
10 #include "base/logging.h" | 10 #include "base/logging.h" |
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75 | 75 |
76 // static | 76 // static |
77 size_t WaitableEvent::WaitMany(WaitableEvent** events, size_t count) { | 77 size_t WaitableEvent::WaitMany(WaitableEvent** events, size_t count) { |
78 HANDLE handles[MAXIMUM_WAIT_OBJECTS]; | 78 HANDLE handles[MAXIMUM_WAIT_OBJECTS]; |
79 CHECK(count <= MAXIMUM_WAIT_OBJECTS) | 79 CHECK(count <= MAXIMUM_WAIT_OBJECTS) |
80 << "Can only wait on " << MAXIMUM_WAIT_OBJECTS << " with WaitMany"; | 80 << "Can only wait on " << MAXIMUM_WAIT_OBJECTS << " with WaitMany"; |
81 | 81 |
82 for (size_t i = 0; i < count; ++i) | 82 for (size_t i = 0; i < count; ++i) |
83 handles[i] = events[i]->handle(); | 83 handles[i] = events[i]->handle(); |
84 | 84 |
| 85 // The cast is safe because count is small - see the CHECK above. |
85 DWORD result = | 86 DWORD result = |
86 WaitForMultipleObjects(count, handles, | 87 WaitForMultipleObjects(static_cast<DWORD>(count), |
| 88 handles, |
87 FALSE, // don't wait for all the objects | 89 FALSE, // don't wait for all the objects |
88 INFINITE); // no timeout | 90 INFINITE); // no timeout |
89 if (result >= WAIT_OBJECT_0 + count) { | 91 if (result >= WAIT_OBJECT_0 + count) { |
90 NOTREACHED() << "WaitForMultipleObjects failed: " << GetLastError(); | 92 NOTREACHED() << "WaitForMultipleObjects failed: " << GetLastError(); |
91 return 0; | 93 return 0; |
92 } | 94 } |
93 | 95 |
94 return result - WAIT_OBJECT_0; | 96 return result - WAIT_OBJECT_0; |
95 } | 97 } |
96 | 98 |
97 } // namespace base | 99 } // namespace base |
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