1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef INCLUDE_PERFETTO_PROTOZERO_CONTIGUOUS_MEMORY_RANGE_H_ 18 #define INCLUDE_PERFETTO_PROTOZERO_CONTIGUOUS_MEMORY_RANGE_H_ 19 20 #include <assert.h> 21 #include <stddef.h> 22 #include <stdint.h> 23 24 namespace protozero { 25 26 // Keep this struct trivially constructible (no ctors, no default initializers). 27 struct ContiguousMemoryRange { 28 uint8_t* begin; 29 uint8_t* end; // STL style: one byte past the end of the buffer. 30 31 inline bool is_valid() const { return begin != nullptr; } 32 inline void reset() { begin = nullptr; } 33 inline size_t size() { return static_cast<size_t>(end - begin); } 34 }; 35 36 } // namespace protozero 37 38 #endif // INCLUDE_PERFETTO_PROTOZERO_CONTIGUOUS_MEMORY_RANGE_H_ 39
