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1 // Copyright 2015 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #include "base/basictypes.h" | |
6 #include "base/logging.h" | |
7 #include "base/process/process_handle.h" | |
8 | |
9 namespace base { | |
10 | |
11 namespace { | |
12 uint32 g_unique_id = kInvalidUniqueId; | |
13 | |
14 #if DCHECK_IS_ON() | |
15 // The process which set g_unique_id. | |
Lei Zhang
2015/07/28 21:54:23
Please refer to variables are |foo|. Ditto below.
rickyz (no longer on Chrome)
2015/07/28 22:39:37
Done.
| |
16 uint32 g_procid; | |
17 #endif | |
18 } // namespace | |
19 | |
20 uint32 GetUniqueIdForProcess() { | |
21 if (g_unique_id == kInvalidUniqueId) { | |
22 return static_cast<uint32>(GetCurrentProcId()); | |
23 } | |
24 | |
25 // Make sure we are the same process that set g_procid. This check may have | |
26 // false negatives (if a process ID was reused) but should have no false | |
27 // positives. | |
28 DCHECK_EQ(static_cast<uint32>(GetCurrentProcId()), g_procid); | |
29 return g_unique_id; | |
30 } | |
31 | |
32 void SetUniqueIdForProcess(uint32 unique_id) { | |
33 g_unique_id = unique_id; | |
34 #if DCHECK_IS_ON() | |
35 g_procid = static_cast<uint32>(GetCurrentProcId()); | |
36 #endif | |
37 } | |
38 | |
39 } // namespace base | |
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