/Users/deen/code/yugabyte-db/src/yb/gutil/synchronization_profiling.h
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1 | | // -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- |
2 | | /* Copyright (c) 2010, Google Inc. |
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10 | | * notice, this list of conditions and the following disclaimer. |
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30 | | * |
31 | | * The following only applies to changes made to this file as part of YugaByte development. |
32 | | * |
33 | | * Portions Copyright (c) YugaByte, Inc. |
34 | | * |
35 | | * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except |
36 | | * in compliance with the License. You may obtain a copy of the License at |
37 | | * |
38 | | * http://www.apache.org/licenses/LICENSE-2.0 |
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43 | | * under the License. |
44 | | * |
45 | | * |
46 | | * --- |
47 | | * Author: Chris Ruemmler |
48 | | */ |
49 | | |
50 | | #ifndef YB_GUTIL_SYNCHRONIZATION_PROFILING_H |
51 | | #define YB_GUTIL_SYNCHRONIZATION_PROFILING_H |
52 | | |
53 | | #include "yb/gutil/integral_types.h" |
54 | | |
55 | | namespace gutil { |
56 | | |
57 | | // We can do contention-profiling of SpinLocks, but the code is in |
58 | | // mutex.cc, which is not always linked in with spinlock. Hence we |
59 | | // provide a weak definition, which are used if mutex.cc isn't linked in. |
60 | | |
61 | | // Submit the number of cycles the spinlock spent contending. |
62 | | ATTRIBUTE_WEAK extern void SubmitSpinLockProfileData(const void *, int64); |
63 | | extern void SubmitSpinLockProfileData(const void *contendedlock, |
64 | 11.6M | int64 wait_cycles) {} |
65 | | } // namespace gutil |
66 | | |
67 | | #endif // YB_GUTIL_SYNCHRONIZATION_PROFILING_H |