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Marko Mikulicic authored and Cesanta Bot committed 2016-07-21 13:38:48 +00:00
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title: Memory buffers
---
Each connection has send and receive buffer, `struct mg_connection::send_mbuf`
and `struct mg_connection::recv_mbuf` respectively. When data arrives,
Mongoose appends received data to the `recv_mbuf` and triggers `MG_EV_RECV`
event. User may send data back by calling one of the output functions, like
Each connection has a send and receive buffer, `struct mg_connection::send_mbuf`
and `struct mg_connection::recv_mbuf` respectively. When data arrives,
Mongoose appends received data to the `recv_mbuf` and triggers an `MG_EV_RECV`
event. The user may send data back by calling one of the output functions, like
`mg_send()` or `mg_printf()`. Output functions append data to the `send_mbuf`.
When Mongoose successfully writes data to the socket, it discards data from
`struct mg_connection::send_mbuf` and sends `MG_EV_SEND` event. When connection
is closed, `MG_EV_CLOSE` event is sent.
`struct mg_connection::send_mbuf` and sends an `MG_EV_SEND` event. When the connection
is closed, an `MG_EV_CLOSE` event is sent.
![](media/mbuf.png)