Threading_in_Cpp/timed_mutex.cpp at main · CoderPanda1729/Threading_in_Cpp · GitHub

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// TOPIC: Timed Mutex In C++ Threading (std::timed_mutex)

// NOTES:

// 0. std::timed_mutex is blocked till timeout_time or the lock is aquired and returns true if success

//    otherwise false.

// 1. Member Function:

//    a. lock

//    b. try_lock

//    c. try_lock_for    ---\ These two functions makes it different from mutex.

//    d. try_lock_until  ---/

//    e. unlock


//  EXAMPLE: try_lock_for();

//  Waits until specified timeout_duration has elapsed or the lock is acquired, whichever comes first.

//  On successful lock acquisition returns true, otherwise returns false.


#include <iostream>

#include <thread>

#include <mutex>

#include <chrono>

using namespace std;


int myAmount = 0;

std::timed_mutex m;


void increment(int i) {

    if(m.try_lock_for(std::chrono::seconds(2))){

        ++myAmount;

        std::this_thread::sleep_for (std::chrono::seconds(1));

        cout << "Thread " << i << " Entered" << endl;

        m.unlock();

    }else{

        cout << "Thread " << i << " Couldn't Enter" << endl;

    }

}


int main() {

    std::thread t1(increment, 1);

    std::thread t2(increment, 2);


    t1.join();

    t2.join();


    cout << myAmount << endl;

    return 0;

}


// EXAMPLE: try_lock_until

// Waits until specified timeout_time has been reached or the lock is acquired, whichever comes first.

// On successful lock acquisition returns true, otherwise returns false.


// #include <iostream>

// #include <thread>

// #include <mutex>

// #include <chrono>

// using namespace std;


// int myAmount = 0;

// std::timed_mutex m;


// void increment(int i) {

//     auto now=std::chrono::steady_clock::now();

//     if(m.try_lock_until(now + std::chrono::seconds(2))){

//         ++myAmount;

//         std::this_thread::sleep_for (std::chrono::seconds(1));

//         cout << "Thread " << i << " Entered" << endl;

//         m.unlock();

//     }else{

//         cout << "Thread " << i << " Couldn't Enter" << endl;

//     }

// }


// int main() {

//     std::thread t1(increment, 1);

//     std::thread t2(increment, 2);


//     t1.join();

//     t2.join();


//     cout << myAmount << endl;

//     return 0;

// }