C++ (Cpp) evbuffer_launch_read Examples

Example #1

File: bufferevent_async.c Project: rphillips/libevent

static void
bev_async_consider_reading(struct bufferevent_async *b)
{
	size_t cur_size;
	size_t read_high;
	size_t at_most;
	/* Don't read if there is a read in progress, or we do not
	 * want to read. */
	if (b->read_in_progress || !(b->bev.bev.enabled&EV_READ))
		return;

	/* Don't read if we're full */
	cur_size = evbuffer_get_length(b->bev.bev.input);
	read_high = b->bev.bev.wm_read.high;
	if (read_high) {
		if (cur_size >= read_high)
			return;
		at_most = read_high - cur_size;
	} else {
		at_most = 16384; /* FIXME totally magic. */
	}

	if (evbuffer_launch_read(b->bev.bev.input, at_most)) {
		EVUTIL_ASSERT(0);
	} else {
		b->read_in_progress = 1;
	}
}

Example #2

File: bufferevent_async.c Project: jimmy-kuo/websearch

static void
bev_async_consider_reading(struct bufferevent_async *beva)
{
	size_t cur_size;
	size_t read_high;
	size_t at_most;
	int limit;
	struct bufferevent *bev = &beva->bev.bev;

	/* Don't read if there is a read in progress, or we do not
	 * want to read. */
	if (beva->read_in_progress || beva->bev.connecting)
		return;
	if (!beva->ok || !(bev->enabled&EV_READ)) {
		bev_async_del_read(beva);
		return;
	}

	/* Don't read if we're full */
	cur_size = evbuffer_get_length(bev->input);
	read_high = bev->wm_read.high;
	if (read_high) {
		if (cur_size >= read_high) {
			bev_async_del_read(beva);
			return;
		}
		at_most = read_high - cur_size;
	} else {
		at_most = 16384; /* FIXME totally magic. */
	}

	/* XXXX This over-commits. */
	/* XXXX see also not above on cast on _bufferevent_get_write_max() */
	limit = (int)_bufferevent_get_read_max(&beva->bev);
	if (at_most >= (size_t)limit && limit >= 0)
		at_most = limit;

	if (beva->bev.read_suspended) {
		bev_async_del_read(beva);
		return;
	}

	bufferevent_incref(bev);
	if (evbuffer_launch_read(bev->input, at_most, &beva->read_overlapped)) {
		beva->ok = 0;
		_bufferevent_run_eventcb(bev, BEV_EVENT_ERROR);
		bufferevent_decref(bev);
	} else {
		beva->read_in_progress = at_most;
		_bufferevent_decrement_read_buckets(&beva->bev, at_most);
		bev_async_add_read(beva);
	}

	return;
}

Example #3

File: bufferevent_async.c Project: andyk/load_gen

static void
bev_async_consider_reading(struct bufferevent_async *b)
{
	size_t cur_size;
	size_t read_high;
	size_t at_most;
	int limit;
	/* Don't read if there is a read in progress, or we do not
	 * want to read. */
	if (!b->ok || b->read_in_progress || !(b->bev.bev.enabled&EV_READ))
		return;

	/* Don't read if we're full */
	cur_size = evbuffer_get_length(b->bev.bev.input);
	read_high = b->bev.bev.wm_read.high;
	if (read_high) {
		if (cur_size >= read_high)
			return;
		at_most = read_high - cur_size;
	} else {
		at_most = 16384; /* FIXME totally magic. */
	}

	/* XXXX This over-commits. */
	limit = _bufferevent_get_read_max(&b->bev);
	if (at_most >= limit)
		at_most = limit;

	if (b->bev.read_suspended)
		return;

	if (evbuffer_launch_read(b->bev.bev.input, at_most,
	    &b->read_overlapped)) {
		EVUTIL_ASSERT(0);
	} else {
		b->read_in_progress = 1;
	}
}