Created
September 14, 2018 16:15
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nonblock input in C
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| #include <unistd.h> | |
| #include <stdio.h> | |
| // cc.byexamples.com calls this int kbhit(), to mirror the Windows console | |
| // function of the same name. Otherwise, the code is the same. | |
| bool inputAvailable() | |
| { | |
| struct timeval tv; | |
| fd_set fds; | |
| tv.tv_sec = 0; | |
| tv.tv_usec = 0; | |
| FD_ZERO(&fds); | |
| FD_SET(STDIN_FILENO, &fds); | |
| select(STDIN_FILENO+1, &fds, NULL, NULL, &tv); | |
| return (FD_ISSET(0, &fds)); | |
| } | |
| int main(int argc, char* argv[]) | |
| { | |
| std::string initialCommand; | |
| if (argc > 1) { | |
| // Code to get the initial command from a file | |
| } else { | |
| while (!inputAvailable()) { | |
| std::cout << "Waiting for input (Ctrl-C to cancel)..." << std::endl; | |
| sleep(1); | |
| } | |
| std::getline(std::cin, initialCommand); | |
| } | |
| // Start a thread class instance 'jobThread' to run the command | |
| // Start a thread class instance 'inputThread' to look for further commands | |
| return 0; | |
| } |
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