1*635a8641SAndroid Build Coastguard Worker // Copyright 2013 The Chromium Authors. All rights reserved. 2*635a8641SAndroid Build Coastguard Worker // Use of this source code is governed by a BSD-style license that can be 3*635a8641SAndroid Build Coastguard Worker // found in the LICENSE file. 4*635a8641SAndroid Build Coastguard Worker 5*635a8641SAndroid Build Coastguard Worker #ifndef BASE_SYS_INFO_INTERNAL_H_ 6*635a8641SAndroid Build Coastguard Worker #define BASE_SYS_INFO_INTERNAL_H_ 7*635a8641SAndroid Build Coastguard Worker 8*635a8641SAndroid Build Coastguard Worker #include "base/macros.h" 9*635a8641SAndroid Build Coastguard Worker 10*635a8641SAndroid Build Coastguard Worker namespace base { 11*635a8641SAndroid Build Coastguard Worker 12*635a8641SAndroid Build Coastguard Worker namespace internal { 13*635a8641SAndroid Build Coastguard Worker 14*635a8641SAndroid Build Coastguard Worker template<typename T, T (*F)(void)> 15*635a8641SAndroid Build Coastguard Worker class LazySysInfoValue { 16*635a8641SAndroid Build Coastguard Worker public: LazySysInfoValue()17*635a8641SAndroid Build Coastguard Worker LazySysInfoValue() 18*635a8641SAndroid Build Coastguard Worker : value_(F()) { } 19*635a8641SAndroid Build Coastguard Worker 20*635a8641SAndroid Build Coastguard Worker ~LazySysInfoValue() = default; 21*635a8641SAndroid Build Coastguard Worker value()22*635a8641SAndroid Build Coastguard Worker T value() { return value_; } 23*635a8641SAndroid Build Coastguard Worker 24*635a8641SAndroid Build Coastguard Worker private: 25*635a8641SAndroid Build Coastguard Worker const T value_; 26*635a8641SAndroid Build Coastguard Worker 27*635a8641SAndroid Build Coastguard Worker DISALLOW_COPY_AND_ASSIGN(LazySysInfoValue); 28*635a8641SAndroid Build Coastguard Worker }; 29*635a8641SAndroid Build Coastguard Worker 30*635a8641SAndroid Build Coastguard Worker } // namespace internal 31*635a8641SAndroid Build Coastguard Worker 32*635a8641SAndroid Build Coastguard Worker } // namespace base 33*635a8641SAndroid Build Coastguard Worker 34*635a8641SAndroid Build Coastguard Worker #endif // BASE_SYS_INFO_INTERNAL_H_ 35