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#ifndef IO_H
#define IO_H
/*=========================================================================*\
* Input/Output abstraction
* LuaSocket toolkit
*
* This module defines the interface that LuaSocket expects from the
* transport layer for streamed input/output. The idea is that if any
* transport implements this interface, then the buffer.c functions
* automatically work on it.
*
* The module socket.h implements this interface, and thus the module tcp.h
* is very simple.
*
* RCS ID: $Id$
\*=========================================================================*/
#include <stdio.h>
#include <lua.h>
#include "timeout.h"
/* IO error codes */
enum {
IO_DONE, /* operation completed successfully */
IO_TIMEOUT, /* operation timed out */
IO_CLOSED, /* the connection has been closed */
IO_CLIPPED, /* maxium bytes count reached */
IO_USER /* last element in enum is user custom error */
};
/* interface to send function */
typedef int (*p_send) (
void *ctx, /* context needed by send */
const char *data, /* pointer to buffer with data to send */
size_t count, /* number of bytes to send from buffer */
size_t *sent, /* number of bytes sent uppon return */
p_tm tm /* timeout control */
);
/* returns an error string */
typedef const char *(*p_geterr) (
void *ctx, /* context needed by geterror */
int code /* error code */
);
/* interface to recv function */
typedef int (*p_recv) (
void *ctx, /* context needed by recv */
char *data, /* pointer to buffer where data will be writen */
size_t count, /* number of bytes to receive into buffer */
size_t *got, /* number of bytes received uppon return */
p_tm tm /* timeout control */
);
/* IO driver definition */
typedef struct t_io_ {
void *ctx; /* context needed by send/recv */
p_send send; /* send function pointer */
p_recv recv; /* receive function pointer */
p_geterr geterr; /* receive function pointer */
} t_io;
typedef t_io *p_io;
const char *io_strerror(int code);
void io_pusherror(lua_State *L, p_io io, int code);
void io_init(p_io io, p_send send, p_recv recv, p_geterr geterr, void *ctx);
#endif /* IO_H */
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