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我正在使用Glib开发多线程 C 软件。

我想要一组活线程。一旦某个线程完成，另一个线程就会以不同的参数开始。它类似于线程池。

我正在使用glib 线程来实现多线程。但是我在谷歌上找不到很多教程。我现在可以启动一组线程，但不知道等待。我的一些代码：

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);

谢谢。

问题解决了。更新：

刚刚找到了一个 glib 的线程池实现：Thread Pools。我已经运行它并且它工作正常。代码写成：

// '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);
}
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1 回答 1

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g_thread_join返回返回值，因此您只需检查它。假设您要创建一个新进程，如果返回值为 17。

for (i = 0; i < n_threads; ++i) {
    if (threads[i] && g_thread_join(threads[i]) == 17) {  
        /* Start a new thread. */
        threads[i] = g_thread_create((GThreadFunc) pe_lib_thread, data + i,
            TRUE, NULL);
    } else {
        threads[i] = NULL;
    }
}
于 2013-01-11T08:20:38.013 回答