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 
is_validContiguousMemoryRange31   inline bool is_valid() const { return begin != nullptr; }
resetContiguousMemoryRange32   inline void reset() { begin = nullptr; }
sizeContiguousMemoryRange33   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