Run functions in parallel c++












-3















I have a class A, it has 4 methods. I'm creating two instances a,b. What I need is to run both a.function 1 to 4 and b.function 1 to 4 at the same time in c++?






c++







share|improve this question




















  • 1





    You need to use threads.

    – paddy
    Nov 14 '18 at 4:59











  • Threads, perhaps? ta = std::thread(&A::function, &a); tb = std::thread(&A::function, &b); ta.join(); tb.join();

    – Severin Pappadeux
    Nov 14 '18 at 5:00











  • Have you tried before asking this question?

    – Ved Prakash
    Nov 14 '18 at 5:04











  • Pay attention that the situation becomes very difficult if you have a data race, for example if both threads try to modify the same variable.

    – Damien
    Nov 14 '18 at 9:30
















-3















I have a class A, it has 4 methods. I'm creating two instances a,b. What I need is to run both a.function 1 to 4 and b.function 1 to 4 at the same time in c++?






c++







share|improve this question




















  • 1





    You need to use threads.

    – paddy
    Nov 14 '18 at 4:59











  • Threads, perhaps? ta = std::thread(&A::function, &a); tb = std::thread(&A::function, &b); ta.join(); tb.join();

    – Severin Pappadeux
    Nov 14 '18 at 5:00











  • Have you tried before asking this question?

    – Ved Prakash
    Nov 14 '18 at 5:04











  • Pay attention that the situation becomes very difficult if you have a data race, for example if both threads try to modify the same variable.

    – Damien
    Nov 14 '18 at 9:30














-3












-3








-3








I have a class A, it has 4 methods. I'm creating two instances a,b. What I need is to run both a.function 1 to 4 and b.function 1 to 4 at the same time in c++?






c++







share|improve this question
















I have a class A, it has 4 methods. I'm creating two instances a,b. What I need is to run both a.function 1 to 4 and b.function 1 to 4 at the same time in c++?






c++




c++






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 14 '18 at 6:27









Shrikanth N

510211




510211










asked Nov 14 '18 at 4:57









Ragavan KalatharanRagavan Kalatharan

4




4








  • 1





    You need to use threads.

    – paddy
    Nov 14 '18 at 4:59











  • Threads, perhaps? ta = std::thread(&A::function, &a); tb = std::thread(&A::function, &b); ta.join(); tb.join();

    – Severin Pappadeux
    Nov 14 '18 at 5:00











  • Have you tried before asking this question?

    – Ved Prakash
    Nov 14 '18 at 5:04











  • Pay attention that the situation becomes very difficult if you have a data race, for example if both threads try to modify the same variable.

    – Damien
    Nov 14 '18 at 9:30














  • 1





    You need to use threads.

    – paddy
    Nov 14 '18 at 4:59











  • Threads, perhaps? ta = std::thread(&A::function, &a); tb = std::thread(&A::function, &b); ta.join(); tb.join();

    – Severin Pappadeux
    Nov 14 '18 at 5:00











  • Have you tried before asking this question?

    – Ved Prakash
    Nov 14 '18 at 5:04











  • Pay attention that the situation becomes very difficult if you have a data race, for example if both threads try to modify the same variable.

    – Damien
    Nov 14 '18 at 9:30








1




1





You need to use threads.

– paddy
Nov 14 '18 at 4:59





You need to use threads.

– paddy
Nov 14 '18 at 4:59













Threads, perhaps? ta = std::thread(&A::function, &a); tb = std::thread(&A::function, &b); ta.join(); tb.join();

– Severin Pappadeux
Nov 14 '18 at 5:00





Threads, perhaps? ta = std::thread(&A::function, &a); tb = std::thread(&A::function, &b); ta.join(); tb.join();

– Severin Pappadeux
Nov 14 '18 at 5:00













Have you tried before asking this question?

– Ved Prakash
Nov 14 '18 at 5:04





Have you tried before asking this question?

– Ved Prakash
Nov 14 '18 at 5:04













Pay attention that the situation becomes very difficult if you have a data race, for example if both threads try to modify the same variable.

– Damien
Nov 14 '18 at 9:30





Pay attention that the situation becomes very difficult if you have a data race, for example if both threads try to modify the same variable.

– Damien
Nov 14 '18 at 9:30












1 Answer
1






active

oldest

votes


















5














It seem to me, what you are asking for is multi-threading. For C++ you may rely on native thread support or libraries like boost,which is cross platform and is widely used in industry. High level languages like Java and C# have the functionality for multi threading in built ,which is much easier to do this.



You can implement this is with the future library (#include <future>).



If your functions are



int my_func(int param1, int param2, int param3); 

int my_second_func(int param1, int param2, int param3);


Then you can use future to run the functions asynchronously as follows:



std::future<int> f = std::async(std::launch::async, my_second_func, arg1, arg2, arg3);

int result1 = my_func(arg1, arg2, arg3);

int result2 = f.get();


Where the functions are evaluated in separate threads, asynchronously (in parallel).






share|improve this answer





















  • 2





    C++ has native thread support also.

    – bolov
    Nov 14 '18 at 5:28






  • 1





    I see . Thank You .

    – Md. Mokammal Hossen Farnan
    Nov 14 '18 at 5:50








  • 1





    C+11 and above has lot of capabilities in-built that were earlier provided by boost libraries. You can check out the link: thispointer.com/…

    – Shrikanth N
    Nov 14 '18 at 6:01











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1 Answer
1






active

oldest

votes








1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes









5














It seem to me, what you are asking for is multi-threading. For C++ you may rely on native thread support or libraries like boost,which is cross platform and is widely used in industry. High level languages like Java and C# have the functionality for multi threading in built ,which is much easier to do this.



You can implement this is with the future library (#include <future>).



If your functions are



int my_func(int param1, int param2, int param3); 

int my_second_func(int param1, int param2, int param3);


Then you can use future to run the functions asynchronously as follows:



std::future<int> f = std::async(std::launch::async, my_second_func, arg1, arg2, arg3);

int result1 = my_func(arg1, arg2, arg3);

int result2 = f.get();


Where the functions are evaluated in separate threads, asynchronously (in parallel).






share|improve this answer





















  • 2





    C++ has native thread support also.

    – bolov
    Nov 14 '18 at 5:28






  • 1





    I see . Thank You .

    – Md. Mokammal Hossen Farnan
    Nov 14 '18 at 5:50








  • 1





    C+11 and above has lot of capabilities in-built that were earlier provided by boost libraries. You can check out the link: thispointer.com/…

    – Shrikanth N
    Nov 14 '18 at 6:01
















5














It seem to me, what you are asking for is multi-threading. For C++ you may rely on native thread support or libraries like boost,which is cross platform and is widely used in industry. High level languages like Java and C# have the functionality for multi threading in built ,which is much easier to do this.



You can implement this is with the future library (#include <future>).



If your functions are



int my_func(int param1, int param2, int param3); 

int my_second_func(int param1, int param2, int param3);


Then you can use future to run the functions asynchronously as follows:



std::future<int> f = std::async(std::launch::async, my_second_func, arg1, arg2, arg3);

int result1 = my_func(arg1, arg2, arg3);

int result2 = f.get();


Where the functions are evaluated in separate threads, asynchronously (in parallel).






share|improve this answer





















  • 2





    C++ has native thread support also.

    – bolov
    Nov 14 '18 at 5:28






  • 1





    I see . Thank You .

    – Md. Mokammal Hossen Farnan
    Nov 14 '18 at 5:50








  • 1





    C+11 and above has lot of capabilities in-built that were earlier provided by boost libraries. You can check out the link: thispointer.com/…

    – Shrikanth N
    Nov 14 '18 at 6:01














5












5








5







It seem to me, what you are asking for is multi-threading. For C++ you may rely on native thread support or libraries like boost,which is cross platform and is widely used in industry. High level languages like Java and C# have the functionality for multi threading in built ,which is much easier to do this.



You can implement this is with the future library (#include <future>).



If your functions are



int my_func(int param1, int param2, int param3); 

int my_second_func(int param1, int param2, int param3);


Then you can use future to run the functions asynchronously as follows:



std::future<int> f = std::async(std::launch::async, my_second_func, arg1, arg2, arg3);

int result1 = my_func(arg1, arg2, arg3);

int result2 = f.get();


Where the functions are evaluated in separate threads, asynchronously (in parallel).






share|improve this answer















It seem to me, what you are asking for is multi-threading. For C++ you may rely on native thread support or libraries like boost,which is cross platform and is widely used in industry. High level languages like Java and C# have the functionality for multi threading in built ,which is much easier to do this.



You can implement this is with the future library (#include <future>).



If your functions are



int my_func(int param1, int param2, int param3); 

int my_second_func(int param1, int param2, int param3);


Then you can use future to run the functions asynchronously as follows:



std::future<int> f = std::async(std::launch::async, my_second_func, arg1, arg2, arg3);

int result1 = my_func(arg1, arg2, arg3);

int result2 = f.get();


Where the functions are evaluated in separate threads, asynchronously (in parallel).







share|improve this answer














share|improve this answer



share|improve this answer








edited Nov 14 '18 at 8:05









piet.t

10k63245




10k63245










answered Nov 14 '18 at 5:16









Md. Mokammal Hossen FarnanMd. Mokammal Hossen Farnan

586320




586320








  • 2





    C++ has native thread support also.

    – bolov
    Nov 14 '18 at 5:28






  • 1





    I see . Thank You .

    – Md. Mokammal Hossen Farnan
    Nov 14 '18 at 5:50








  • 1





    C+11 and above has lot of capabilities in-built that were earlier provided by boost libraries. You can check out the link: thispointer.com/…

    – Shrikanth N
    Nov 14 '18 at 6:01














  • 2





    C++ has native thread support also.

    – bolov
    Nov 14 '18 at 5:28






  • 1





    I see . Thank You .

    – Md. Mokammal Hossen Farnan
    Nov 14 '18 at 5:50








  • 1





    C+11 and above has lot of capabilities in-built that were earlier provided by boost libraries. You can check out the link: thispointer.com/…

    – Shrikanth N
    Nov 14 '18 at 6:01








2




2





C++ has native thread support also.

– bolov
Nov 14 '18 at 5:28





C++ has native thread support also.

– bolov
Nov 14 '18 at 5:28




1




1





I see . Thank You .

– Md. Mokammal Hossen Farnan
Nov 14 '18 at 5:50







I see . Thank You .

– Md. Mokammal Hossen Farnan
Nov 14 '18 at 5:50






1




1





C+11 and above has lot of capabilities in-built that were earlier provided by boost libraries. You can check out the link: thispointer.com/…

– Shrikanth N
Nov 14 '18 at 6:01





C+11 and above has lot of capabilities in-built that were earlier provided by boost libraries. You can check out the link: thispointer.com/…

– Shrikanth N
Nov 14 '18 at 6:01


















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