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POPorting a threaded C program to Python
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copied!<p>As an exercise, I would like to port some of the functionality of a threaded C program (using pthreads) to Python.</p> <p>The C program spawns a thread to (almost) constantly iterate through certain directories, filling a data structure with their contents; these directories change crazy frequently (it's a mail queue). </p> <p>The main body of the program reacts to the contents of that data structure in various ways.</p> <p>From what I've read, Python has problems with concurrency.<br> Am I going to be able to implement this?<br> If so, do you have any advice?</p> <p>I've just recently started using Python regularly, and I'm loving it.</p> <p>FYI, the source code resembles this:</p> <pre><code>// big struct for everything struct context_t { struct datastruct_t data; pthread_t my_thread; pthread_mutex_t my_mutex; } int thread_control; // does the dirty work void *thread_func(void *arg) { while ( thread_control == TH_RUNNABLE ) { // loop through dirs // fill up ctx->data sleep(1); } pthread_mutex_unlock ( my_mutex ); thread_control = TH_STOPPED; pthread_exit(NULL); } int start_thread(struct context_t* ctx) { // get a mutex to control access to our data pthread_mutex_trylock(&ctx->my_mutex) thread_control = TH_RUNNABLE; // start the thread pthread_create ( &ctx->my_thread, NULL, thread_func, ctx ); } int stop_thread() { thread_control = TH_STOPRQ; } int main() { struct context_t *ctx; start_thread(ctx); // do stuff } </code></pre> <p>Thanks!!!</p>

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