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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 "luasocket.h"
19#include "io.h"
20#include "timeout.h"
21
22/* buffer size in bytes */
23#define BUF_SIZE 8192
24
25/* buffer control structure */
26typedef struct t_buffer_ {
27 double birthday; /* throttle support info: creation time, */
28 size_t sent, received; /* bytes sent, and bytes received */
29 p_io io; /* IO driver used for this buffer */
30 p_timeout tm; /* timeout management for this buffer */
31 size_t first, last; /* index of first and last bytes of stored data */
32 char data[BUF_SIZE]; /* storage space for buffer data */
33} t_buffer;
34typedef t_buffer *p_buffer;
35
36#ifndef _WIN32
37#pragma GCC visibility push(hidden)
38#endif
39
40int buffer_open(lua_State *L);
41void buffer_init(p_buffer buf, p_io io, p_timeout tm);
42int buffer_meth_getstats(lua_State *L, p_buffer buf);
43int buffer_meth_setstats(lua_State *L, p_buffer buf);
44int buffer_meth_send(lua_State *L, p_buffer buf);
45int buffer_meth_receive(lua_State *L, p_buffer buf);
46int buffer_isempty(p_buffer buf);
47
48#ifndef _WIN32
49#pragma GCC visibility pop
50#endif
51
52#endif /* BUF_H */