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key.h
1 //
2 // Copyright 2018 Pixar
3 //
4 // Licensed under the Apache License, Version 2.0 (the "Apache License")
5 // with the following modification; you may not use this file except in
6 // compliance with the Apache License and the following modification to it:
7 // Section 6. Trademarks. is deleted and replaced with:
8 //
9 // 6. Trademarks. This License does not grant permission to use the trade
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11 // and its affiliates, except as required to comply with Section 4(c) of
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14 // You may obtain a copy of the Apache License at
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16 // http://www.apache.org/licenses/LICENSE-2.0
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24 
25 #ifndef TRACE_KEY_H
26 #define TRACE_KEY_H
27 
28 #include "pxr/pxr.h"
29 #include "pxr/base/trace/staticKeyData.h"
30 
31 
32 PXR_NAMESPACE_OPEN_SCOPE
33 
40 class TraceKey {
41 public:
43  constexpr TraceKey(const TraceStaticKeyData& data) : _ptr(&data) {}
44 
46  bool operator == (const TraceKey& other) const {
47  if (_ptr == other._ptr) {
48  return true;
49  } else {
50  return *_ptr == *other._ptr;
51  }
52  }
53 
55  size_t Hash() const {
56  return reinterpret_cast<size_t>(_ptr)/sizeof(TraceStaticKeyData);
57  }
58 
60  struct HashFunctor {
61  size_t operator()(const TraceKey& key) const {
62  return key.Hash();
63  }
64  };
65 
66 private:
67  const TraceStaticKeyData* _ptr;
68 
69  // TraceCollection converts TraceKeys to TfTokens for visitors.
70  friend class TraceCollection;
71 };
72 
73 PXR_NAMESPACE_CLOSE_SCOPE
74 
75 #endif // TRACE_KEY_H
constexpr TraceKey(const TraceStaticKeyData &data)
Constructor.
Definition: key.h:43
size_t Hash() const
Hash function.
Definition: key.h:55
bool operator==(const TraceKey &other) const
Equality comparison.
Definition: key.h:46
A Hash functor which may be used to store keys in a TfHashMap.
Definition: key.h:60
This class owns lists of TraceEvent instances per thread, and allows read access to them...
Definition: collection.h:49
This class holds data necessary to create keys for TraceEvent instances.
Definition: staticKeyData.h:42
A wrapper around a TraceStaticKeyData pointer that is stored in TraceEvent instances.
Definition: key.h:40