示例#1
0
bool mainwnd::is_save()
{
    bool result = false;

    if (is_modified()) {
        int choice = query_save_changes();
        switch (choice) {
            case Gtk::RESPONSE_YES:
                if (save_file())
                    result = true;
                break;
            case Gtk::RESPONSE_NO:
                result = true;
                break;
            case Gtk::RESPONSE_CANCEL:
            default:
                break;
        }
    }
    else
        result = true;

    return result;
}
示例#2
0
文件: cache.c 项目: baoson2211/cgit
static int process_slot(struct cache_slot *slot)
{
	int err;

	err = open_slot(slot);
	if (!err && slot->match) {
		if (is_expired(slot)) {
			if (!lock_slot(slot)) {
				/* If the cachefile has been replaced between
				 * `open_slot` and `lock_slot`, we'll just
				 * serve the stale content from the original
				 * cachefile. This way we avoid pruning the
				 * newly generated slot. The same code-path
				 * is chosen if fill_slot() fails for some
				 * reason.
				 *
				 * TODO? check if the new slot contains the
				 * same key as the old one, since we would
				 * prefer to serve the newest content.
				 * This will require us to open yet another
				 * file-descriptor and read and compare the
				 * key from the new file, so for now we're
				 * lazy and just ignore the new file.
				 */
				if (is_modified(slot) || fill_slot(slot)) {
					unlock_slot(slot, 0);
					close_lock(slot);
				} else {
					close_slot(slot);
					unlock_slot(slot, 1);
					slot->cache_fd = slot->lock_fd;
				}
			}
		}
		if ((err = print_slot(slot)) != 0) {
			cache_log("[cgit] error printing cache %s: %s (%d)\n",
				  slot->cache_name,
				  strerror(err),
				  err);
		}
		close_slot(slot);
		return err;
	}

	/* If the cache slot does not exist (or its key doesn't match the
	 * current key), lets try to create a new cache slot for this
	 * request. If this fails (for whatever reason), lets just generate
	 * the content without caching it and fool the caller to belive
	 * everything worked out (but print a warning on stdout).
	 */

	close_slot(slot);
	if ((err = lock_slot(slot)) != 0) {
		cache_log("[cgit] Unable to lock slot %s: %s (%d)\n",
			  slot->lock_name, strerror(err), err);
		slot->fn();
		return 0;
	}

	if ((err = fill_slot(slot)) != 0) {
		cache_log("[cgit] Unable to fill slot %s: %s (%d)\n",
			  slot->lock_name, strerror(err), err);
		unlock_slot(slot, 0);
		close_lock(slot);
		slot->fn();
		return 0;
	}
	// We've got a valid cache slot in the lock file, which
	// is about to replace the old cache slot. But if we
	// release the lockfile and then try to open the new cache
	// slot, we might get a race condition with a concurrent
	// writer for the same cache slot (with a different key).
	// Lets avoid such a race by just printing the content of
	// the lock file.
	slot->cache_fd = slot->lock_fd;
	unlock_slot(slot, 1);
	if ((err = print_slot(slot)) != 0) {
		cache_log("[cgit] error printing cache %s: %s (%d)\n",
			  slot->cache_name,
			  strerror(err),
			  err);
	}
	close_slot(slot);
	return err;
}