int LazyBridge_Request()

in src/mod_rivet_ng/rivet_lazy_mpm.c [359:422]
42 lines of code
4 McCabe index (conditional complexity)

int LazyBridge_Request (request_rec* r,rivet_req_ctype ctype)
{
    lazy_tcl_worker*    w;
    int                 ap_sts;
    rivet_server_conf*  conf = RIVET_SERVER_CONF(r->server->module_config);
    apr_array_header_t* array;
    apr_thread_mutex_t* mutex;

    mutex = module_globals->mpm->vhosts[conf->idx].mutex;
    array = module_globals->mpm->vhosts[conf->idx].array;
    apr_thread_mutex_lock(mutex);

    /* This request may have come while the child process was
     * shutting down. We cannot run the risk that incoming requests
     * may hang the child process by keeping its threads busy,
     * so we simply return an HTTP_INTERNAL_SERVER_ERROR.
     * This is hideous and explains why the 'exit' commands must
     * be avoided at any costs when programming with mod_rivet
     */

    if (module_globals->mpm->server_shutdown == 1)
    {
        ap_log_rerror(APLOG_MARK,APLOG_ERR,APR_EGENERAL,r,
                      MODNAME ": http request aborted during child process shutdown");
        apr_thread_mutex_unlock(mutex);
        return HTTP_INTERNAL_SERVER_ERROR;
    }

    /* If the array is empty we create a new worker thread */

    if (apr_is_empty_array(array))
    {
        w = create_worker(module_globals->pool,r->server);
    }
    else
    {
        w = *(lazy_tcl_worker**) apr_array_pop(array);
    }

    apr_thread_mutex_unlock(mutex);

    /* Locking the thread descriptor structure mutex */

    apr_thread_mutex_lock(w->mutex);
    w->r        = r;
    w->ctype    = ctype;
    w->status   = init;
    w->conf     = conf;
    apr_thread_cond_signal(w->condition);

    /* we wait for the Tcl worker thread to finish its job */

    while (w->status != done) {
        apr_thread_cond_wait(w->condition,w->mutex);
    }
    ap_sts = w->ap_sts;

    w->status = idle;
    w->r      = NULL;
    apr_thread_cond_signal(w->condition);
    apr_thread_mutex_unlock(w->mutex);

    return ap_sts;
}