doc/modules/luaevent.core.bufferevent.mdwn

   1 ----
   2 Functions:
   3
   4 [[toc levels=1]]
   5
   6 ## Read/Write/Error Callback:
   7 * Input: `(bufferevent, what)`
   8         * `bufferevent` - Reference to the bufferevent that raised the callback
   9         * `what` - What happened:
  10                 * == `EVBUFFER_READ` - Buffer contains at least low-watermark length and no more than high-watermark length
  11                 * == `EVBUFFER_WRITE` - Buffer ready to write to
  12                 * (other) - Error condition
  13                         * May be or-ed/added with `EVBUFFER_READ`/`EVBUFFER_WRITE` to specify where it happened
  14                         * `EVBUFFER_ERROR` - Marks error condition (need to look at 'errno' for error.. not exposed yet)
  15                         * `EVBUFFER_TIMEOUT` - Marks activity timeout
  16                         * `EVBUFFER_EOF` - Marks disconnection/end-of-file condition
  17
  18 ## bufferevent.new
  19 * Input: `(fd, read, write, error)`
  20         * `fd` - File descriptor to watch
  21         * `read` - (may be nil) - callback to call when data in buffer is above the low watermark
  22         * `write` - (may be nil) - callback to call when the output buffer contains less data than the low watermark
  23         * `error` - callback to call when there is an erroneous condition
  24
  25 ## bufferevent (__gc)
  26 * Releases the bufferevent
  27         * Disconnects event buffers since they were owned by the bufferevent object in 'C' land
  28         * Disconnects all references so that any erroneous callbacks don't cause failures
  29
  30 ## bufferevent:get_read
  31 * Obtains the input buffer associated w/ the bufferevent
  32
  33 ## bufferevent:get_write
  34 * Obtains the output buffer associated w/ the bufferevent
  35
  36 ## bufferevent:set_read_watermarks
  37 * Input: `(low, high)`
  38         * `low` - Size of buffer at which an event would be fired
  39         * `high` - Maximum size of buffer to read to
  40
  41 ## bufferevent:set_write_watermarks
  42 * Input: `(low, high)`
  43         * `low` - When buffer is below this, the event will be fired
  44         * `high` - N/A to libevent, user app may use this
  45
  46 ## bufferevent:get_read_watermarks
  47 * Output: `low, high`
  48 * See `set_read_watermarks`
  49
  50 ## bufferevent:get_write_watermarks
  51 * Output: `low, high`
  52 * See `set_write_watermarks`
  53
  54 ## bufferevent:set_timeouts
  55 * Sets timeouts for the bufferevent's events
  56 * Input: `(read, write)`
  57         * `read` - Read readiness timeout
  58         * `write` - Write readiness timeout
  59
  60 ## bufferevent:get_timeouts
  61 * Output: `read, write`
  62 * See `set_timeouts`
  63
  64 ## bufferevent:enable/disable
  65 * Input: `event flag`
  66         * `event flag` - `EV_READ`, `EV_WRITE`, or `EV_READ|EV_WRITE`
  67 * Enables/Disables events from being triggered in the next round (some events may get triggered after disable is called)