1 /*
2  * Copyright (C) 2019 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 #pragma once
18 
19 #include <stdint.h>
20 #include <time.h>
21 
Nanotime()22 static __always_inline uint64_t Nanotime() {
23   struct timespec t = {};
24   clock_gettime(CLOCK_MONOTONIC, &t);
25   return static_cast<uint64_t>(t.tv_sec) * 1000000000LL + t.tv_nsec;
26 }
27 
MakeAllocationResident(void * ptr,size_t nbytes,int pagesize)28 static __always_inline void MakeAllocationResident(void* ptr, size_t nbytes, int pagesize) {
29   uint8_t* data = reinterpret_cast<uint8_t*>(ptr);
30   for (size_t i = 0; i < nbytes; i += pagesize) {
31     data[i] = 1;
32   }
33 }
34