1 // Copyright 2014 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 #ifndef TOOLS_BLINK_GC_PLUGIN_TRACING_STATUS_H_ 6 #define TOOLS_BLINK_GC_PLUGIN_TRACING_STATUS_H_ 7 8 // TracingStatus is a three-point value ordered by unneeded < unknown < needed. 9 class TracingStatus { 10 public: Unneeded()11 static TracingStatus Unneeded() { return kUnneeded; } Unknown()12 static TracingStatus Unknown() { return kUnknown; } Needed()13 static TracingStatus Needed() { return kNeeded; } IsUnneeded()14 bool IsUnneeded() const { return status_ == kUnneeded; } IsUnknown()15 bool IsUnknown() const { return status_ == kUnknown; } IsNeeded()16 bool IsNeeded() const { return status_ == kNeeded; } LUB(const TracingStatus & other)17 TracingStatus LUB(const TracingStatus& other) const { 18 return status_ > other.status_ ? status_ : other.status_; 19 } 20 bool operator==(const TracingStatus& other) const { 21 return status_ == other.status_; 22 } 23 private: 24 enum Status { kUnneeded, kUnknown, kNeeded }; TracingStatus(Status status)25 TracingStatus(Status status) : status_(status) {} 26 Status status_; 27 }; 28 29 #endif // TOOLS_BLINK_GC_PLUGIN_TRACING_STATUS_H_ 30