#include <wslay/wslay.h>
.. c:function:: int wslay_event_send(wslay_event_context_ptr ctx)
:c:func:`wslay_event_send` sends queued messages to peer.
When sending a message, it uses
:c:type:`wslay_event_send_callback` function.
Single call of :c:func:`wslay_event_send` sends multiple messages
until :c:type:`wslay_event_send_callback` sets error code
WSLAY_ERR_WOULDBLOCK.
If ctx is initialized for WebSocket client use, :c:func:`wslay_event_send` uses :c:type:`wslay_event_genmask_callback` to get new mask key.
When a message queued using :c:func:`wslay_event_queue_fragmented_msg` is sent, :c:func:`wslay_event_send` invokes :c:type:`wslay_event_fragmented_msg_callback` for that message.
After close control frame is sent, this function calls :c:func:`wslay_event_set_write_enabled` with second argument 0 to disable further transmission to peer.
If there are any pending messages, :c:func:`wslay_event_want_write` returns 1, otherwise returns 0.
In case of a fatal error which leads to negative return code, this function calls :c:func:`wslay_event_set_write_enabled` with second argument 0 to disable further transmission to peer.
:c:func:`wslay_event_send` returns 0 if it succeeds, or one of the following negative error codes:
.. describe:: WSLAY_ERR_CALLBACK_FAILURE User defined callback function is failed.
.. describe:: WSLAY_ERR_NOMEM Out of memory.
When negative error code is returned, application must not make any further call of :c:func:`wslay_event_send` and must close WebSocket connection.
:c:func:`wslay_event_queue_fragmented_msg`, :c:func:`wslay_event_set_write_enabled`, :c:func:`wslay_event_want_write` :c:func:`wslay_event_write`