#include #include #include #include using namespace std; struct timer { std::chrono::time_point start; std::chrono::time_point end; timer() { start = std::chrono::high_resolution_clock::now(); } ~timer() { end = std::chrono::high_resolution_clock::now(); std::chrono::duration t = end - start; cout << "Time taken is " << std::chrono::duration_cast(t).count() << endl; } }; int add(int a,int b) { return (a + b ); } int sub(int a,int b) { return (a - b ); } int mul(int a,int b) { return (a * b ); } void add_1(int a,int b,int& result) { result = (a + b ); } void sub_1(int a,int b,int& result) { result = (a - b ); } void mul_1(int a,int b,int& result) { result = (a * b ); } void demo_Async() { timer obj; cout << "****************Async*************" << endl; future add_future = std::async(std::launch::async,add,1,2); future sub_future = std::async(std::launch::async,sub,1,2); future mul_future = std::async(std::launch::async,mul,1,2); cout << add_future.get() << endl; cout << sub_future.get() << endl; cout << mul_future.get() << endl; } void demo_Thread() { timer obj; cout << "****************Thread*************" << endl; int intAdd = -1; thread add_thread(add_1,1,2,std::ref(intAdd)); int intSub = -1; thread sub_thread(sub_1,1,2,std::ref(intSub)); int intMul = -1; thread mul_thread(mul_1,1,2,std::ref(intMul)); add_thread.join(); sub_thread.join(); mul_thread.join(); cout << intAdd << endl; cout << intSub << endl; cout << intMul << endl; } void demo() { timer obj; cout << "****************Normal*************" << endl; int intAdd = -1; add_1(1,2,intAdd); int intSub = -1; sub_1(1,2,intSub); int intMul = -1; mul_1(1,2,intMul); cout << intAdd << endl; cout << intSub << endl; cout << intMul << endl; } int main() { demo_Async(); cout << endl << endl << endl; demo_Thread(); cout << endl << endl << endl; demo(); return 0; }

Thread_Async