You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
57 lines
1.1 KiB
57 lines
1.1 KiB
/*
|
|
* Copyright (c) 2017-present, Facebook, Inc.
|
|
*
|
|
* This source code is licensed under the MIT license found in the
|
|
* LICENSE file in the root directory of this source tree.
|
|
*/
|
|
|
|
#include <mutex>
|
|
|
|
namespace basics {
|
|
|
|
class LockGuard {
|
|
public:
|
|
LockGuard() {}
|
|
|
|
void set(int new_value) {
|
|
not_guarded = new_value;
|
|
suspiciously_written = new_value;
|
|
std::lock_guard<std::mutex> lock(mutex_);
|
|
well_guarded = new_value;
|
|
suspiciously_read = new_value;
|
|
}
|
|
|
|
int get1() {
|
|
int result;
|
|
std::lock_guard<std::mutex> lock(mutex_);
|
|
result = well_guarded;
|
|
return result;
|
|
}
|
|
|
|
int get2() {
|
|
int result;
|
|
std::lock_guard<std::mutex> lock(mutex_);
|
|
result = suspiciously_written;
|
|
return result;
|
|
}
|
|
|
|
int get3() { return not_guarded; }
|
|
|
|
int get4() { return suspiciously_read; }
|
|
|
|
int test1() {
|
|
int result = get1();
|
|
return suspiciously_read + result;
|
|
}
|
|
|
|
private:
|
|
int well_guarded;
|
|
int suspiciously_read;
|
|
int suspiciously_written;
|
|
int not_guarded;
|
|
std::mutex mutex_;
|
|
|
|
int test2() { return suspiciously_read; }
|
|
};
|
|
} // namespace basics
|