multithreading, thread sync

Question

[NOOBS QUESTION] Good evening to everyone. First, sorry for my English, I'm trying to know better this language.

I've three files:

Main.cpp -> Contain the graphics interface, menu thread and audio thread. Lettore.cpp -> Contain the functions to reconize the type of the file and use the correct library for play the audio, also contain the function for stop, play,pause,skip a song. The two audio code library -> That decode the track and send it to ao for playing.

Now the question is: How I can implement this? My difficulty is in the main file. I write the "menu"("play/pause,skip,ecc....) thread code. Now the audio thread must be separated from the main(because can't block the program, the function for play is in a while), but must communicate with menu thread... How I can do this?

I'm using g++ with C++11 thread module. Thank you for your time

Ps: if this question isn't congruent with the rules i modify this question instantly!

Post what you have done already. – Sergii Khaperskov Feb 07 '14 at 06:58 — Sergii Khaperskov, Feb 07 '14 at 06:58

score 1 · Answer 1 · edited May 23 '17 at 12:15

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If you are using pthread, use mutex variables or queues. There are lot of example available for pthread communication. pthread mutex variables to communicate among threads

inter thread communication

edited May 23 '17 at 12:15

Community

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answered Feb 07 '14 at 07:16

lxkarthi

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score 1 · Accepted Answer · answered Feb 07 '14 at 08:12

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Use a queue common to menu and audio thread. Menu thread fills the queue with commands and the audio thread occasionally checks it.

You can find one implementation of a lock-free thread safe queue in http://moodycamel.com/blog/2013/a-fast-lock-free-queue-for-c++

answered Feb 07 '14 at 08:12

Blaz Bratanic

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Here is another: http://www.boost.org/doc/libs/1_55_0/doc/html/lockfree/examples.html – Frank Apr 26 '14 at 22:25

multithreading, thread sync

2 Answers2