source/texk/web2c/luatexdir/luasocket/src/buffer.h

   1 #ifndef BUF_H
   2 #define BUF_H
   3 /*=========================================================================*\
   4 * Input/Output interface for Lua programs
   5 * LuaSocket toolkit
   6 *
   7 * Line patterns require buffering. Reading one character at a time involves
   8 * too many system calls and is very slow. This module implements the
   9 * LuaSocket interface for input/output on connected objects, as seen by
  10 * Lua programs.
  11 *
  12 * Input is buffered. Output is *not* buffered because there was no simple
  13 * way of making sure the buffered output data would ever be sent.
  14 *
  15 * The module is built on top of the I/O abstraction defined in io.h and the
  16 * timeout management is done with the timeout.h interface.
  17 \*=========================================================================*/
  18 #include "lua.h"
  19
  20 #include "io.h"
  21 #include "timeout.h"
  22
  23 /* buffer size in bytes */
  24 #define BUF_SIZE 8192
  25
  26 /* buffer control structure */
  27 typedef struct t_buffer_ {
  28     double birthday;        /* throttle support info: creation time, */
  29     size_t sent, received;  /* bytes sent, and bytes received */
  30     p_io io;                /* IO driver used for this buffer */
  31     p_timeout tm;           /* timeout management for this buffer */
  32     size_t first, last;     /* index of first and last bytes of stored data */
  33     char data[BUF_SIZE];    /* storage space for buffer data */
  34 } t_buffer;
  35 typedef t_buffer *p_buffer;
  36
  37 int buffer_open(lua_State *L);
  38 void buffer_init(p_buffer buf, p_io io, p_timeout tm);
  39 int buffer_meth_send(lua_State *L, p_buffer buf);
  40 int buffer_meth_receive(lua_State *L, p_buffer buf);
  41 int buffer_meth_getstats(lua_State *L, p_buffer buf);
  42 int buffer_meth_setstats(lua_State *L, p_buffer buf);
  43 int buffer_isempty(p_buffer buf);
  44
  45 #endif /* BUF_H */