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annotate src/io.h @ 0:4b915342e2a8

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LuaSocket 2.0.2 + CMake build description.
author Eric Wing <ewing . public |-at-| gmail . com>
date Tue, 26 Aug 2008 18:40:01 -0700
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4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
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1 #ifndef IO_H
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2 #define IO_H
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3 /*=========================================================================*\
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4 * Input/Output abstraction
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5 * LuaSocket toolkit
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6 *
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7 * This module defines the interface that LuaSocket expects from the
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8 * transport layer for streamed input/output. The idea is that if any
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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9 * transport implements this interface, then the buffer.c functions
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10 * automatically work on it.
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11 *
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12 * The module socket.h implements this interface, and thus the module tcp.h
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13 * is very simple.
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14 *
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15 * RCS ID: $Id: io.h,v 1.11 2005/10/07 04:40:59 diego Exp $
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16 \*=========================================================================*/
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17 #include <stdio.h>
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18 #include "lua.h"
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19
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20 #include "timeout.h"
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21
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22 /* IO error codes */
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23 enum {
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24 IO_DONE = 0, /* operation completed successfully */
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25 IO_TIMEOUT = -1, /* operation timed out */
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26 IO_CLOSED = -2, /* the connection has been closed */
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27 IO_UNKNOWN = -3
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28 };
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29
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30 /* interface to error message function */
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31 typedef const char *(*p_error) (
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32 void *ctx, /* context needed by send */
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33 int err /* error code */
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34 );
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35
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36 /* interface to send function */
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37 typedef int (*p_send) (
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38 void *ctx, /* context needed by send */
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39 const char *data, /* pointer to buffer with data to send */
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40 size_t count, /* number of bytes to send from buffer */
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41 size_t *sent, /* number of bytes sent uppon return */
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42 p_timeout tm /* timeout control */
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43 );
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44
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45 /* interface to recv function */
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46 typedef int (*p_recv) (
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47 void *ctx, /* context needed by recv */
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48 char *data, /* pointer to buffer where data will be writen */
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49 size_t count, /* number of bytes to receive into buffer */
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50 size_t *got, /* number of bytes received uppon return */
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51 p_timeout tm /* timeout control */
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52 );
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53
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54 /* IO driver definition */
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55 typedef struct t_io_ {
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56 void *ctx; /* context needed by send/recv */
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57 p_send send; /* send function pointer */
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58 p_recv recv; /* receive function pointer */
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59 p_error error; /* strerror function */
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60 } t_io;
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61 typedef t_io *p_io;
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62
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63 void io_init(p_io io, p_send send, p_recv recv, p_error error, void *ctx);
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64 const char *io_strerror(int err);
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65
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66 #endif /* IO_H */
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67