1 /*
2  * Copyright (c) 2021 Huawei Device Co., Ltd.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  *     http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #include "native_vsync.h"
17 
18 #include <iostream>
19 #include <thread>
20 #include <unistd.h>
21 
22 static bool flag = false;
OnVSync(long long timestamp,void * data)23 static void OnVSync(long long timestamp, void* data)
24 {
25     flag = true;
26     std::cout << "OnVSync: " << timestamp << std::endl;
27 }
28 
ThreadMain(OH_NativeVSync * nativeVSync)29 static void ThreadMain(OH_NativeVSync* nativeVSync)
30 {
31     OH_NativeVSync_FrameCallback callback = OnVSync;
32     OH_NativeVSync_RequestFrame(nativeVSync, callback, nullptr);
33     while (!flag) {
34         std::cout << "wait for vsync!\n";
35         sleep(1);
36     }
37     std::cout << "vsync come, end this thread\n";
38 }
main(int32_t argc,const char * argv[])39 int32_t main(int32_t argc, const char *argv[])
40 {
41     char name[] = "hello_vsync";
42     OH_NativeVSync* nativeVSync = OH_NativeVSync_Create(name, strlen(name));
43     std::thread th(ThreadMain, nativeVSync);
44     th.join();
45     OH_NativeVSync_Destroy(nativeVSync);
46     return 0;
47 }