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我使用Glib
來開發多線程C軟件。Glib:如何啓動一個新的線程,直到另一個線程完成?
我想有一組活動線程。一旦某個線程完成,另一個線程以不同的參數開始。它就像一個線程池。
我使用glib thread來實現多線程。但是我找不到很多來自Google的教程。我現在可以開始一組線程,但不知道等待。我的一些代碼:
GThread *threads[n_threads];
thread_aux_t *data = (thread_aux_t*) calloc(n_threads, sizeof(thread_aux_t));
for (i = 0; i < n_threads; ++i) {
data[i].parameter = i;
threads[i] = g_thread_create((GThreadFunc) pe_lib_thread, data + i,
TRUE, NULL);
}
/* wait for threads to finish */
for (i = 0; i < n_threads; ++i) {
g_thread_join(threads[i]); // How to start a new thread depending on the return value?
}
free(data);
謝謝。
問題解決了。更新:
剛剛發現了glib的線程池實現:Thread Pools。我已經運行它,它能正常工作。 代碼寫成:
// 'query' is for this new thread,
// 'data' is the global parameters set when initiating the pool
void *pe_lib_thread(gpointer query, gpointer data) {
}
void run_threads() {
GThreadPool *thread_pool = NULL;
// Global parameters by all threads.
thread_aux_t *data = (thread_aux_t*) calloc(1, sizeof(thread_aux_t));
data->shared_hash_table = get_hash_table();
g_thread_init(NULL);
thread_pool = g_thread_pool_new((GFunc) pe_lib_thread, data, n_threads,
TRUE, NULL);
// If n_threads is 10, there are maximum 10 threads running, others are waiting.
for (i = 0; i < n_queries; i++) {
query = &queries[i];
g_thread_pool_push(thread_pool, (gpointer) query, NULL);
}
g_thread_pool_free(thread_pool, 0, 1);
}