1 | /* |
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2 | * Copyright (c) 2005 by Internet Systems Consortium, Inc. ("ISC") |
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3 | * Copyright (c) 1995-1999 by Internet Software Consortium |
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4 | * |
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5 | * Permission to use, copy, modify, and distribute this software for any |
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6 | * purpose with or without fee is hereby granted, provided that the above |
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7 | * copyright notice and this permission notice appear in all copies. |
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8 | * |
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9 | * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES |
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10 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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11 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR |
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12 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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13 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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14 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT |
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15 | * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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16 | */ |
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17 | |
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18 | /*! \file |
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19 | * \brief private interfaces for eventlib |
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20 | * \author vix 09sep95 [initial] |
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21 | * |
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22 | * $Id: eventlib_p.h,v 1.5.18.4 2006/03/10 00:20:08 marka Exp $ |
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23 | * $FreeBSD$ |
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24 | */ |
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25 | |
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26 | #ifndef _EVENTLIB_P_H |
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27 | #define _EVENTLIB_P_H |
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28 | |
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29 | #include <rtems/bsd/sys/param.h> |
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30 | #include <rtems/bsd/sys/types.h> |
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31 | #include <sys/socket.h> |
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32 | #include <netinet/in.h> |
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33 | #include <sys/un.h> |
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34 | |
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35 | #define EVENTLIB_DEBUG 1 |
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36 | |
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37 | #include <errno.h> |
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38 | #include <fcntl.h> |
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39 | #include <stdio.h> |
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40 | #include <stdlib.h> |
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41 | #include <string.h> |
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42 | |
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43 | #ifndef _LIBC |
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44 | #include <isc/list.h> |
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45 | #include <isc/heap.h> |
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46 | #include <isc/memcluster.h> |
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47 | #endif |
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48 | |
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49 | #define EV_MASK_ALL (EV_READ | EV_WRITE | EV_EXCEPT) |
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50 | #define EV_ERR(e) return (errno = (e), -1) |
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51 | #define OK(x) if ((x) < 0) EV_ERR(errno); else (void)NULL |
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52 | #define OKFREE(x, y) if ((x) < 0) { FREE((y)); EV_ERR(errno); } \ |
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53 | else (void)NULL |
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54 | |
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55 | #define NEW(p) if (((p) = memget(sizeof *(p))) != NULL) \ |
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56 | FILL(p); \ |
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57 | else \ |
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58 | (void)NULL; |
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59 | #define OKNEW(p) if (!((p) = memget(sizeof *(p)))) { \ |
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60 | errno = ENOMEM; \ |
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61 | return (-1); \ |
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62 | } else \ |
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63 | FILL(p) |
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64 | #define FREE(p) memput((p), sizeof *(p)) |
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65 | |
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66 | #if EVENTLIB_DEBUG |
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67 | #define FILL(p) memset((p), 0xF5, sizeof *(p)) |
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68 | #else |
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69 | #define FILL(p) |
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70 | #endif |
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71 | |
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72 | #ifdef USE_POLL |
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73 | #ifdef HAVE_STROPTS_H |
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74 | #include <stropts.h> |
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75 | #endif |
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76 | #include <poll.h> |
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77 | #endif /* USE_POLL */ |
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78 | |
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79 | typedef struct evConn { |
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80 | evConnFunc func; |
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81 | void * uap; |
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82 | int fd; |
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83 | int flags; |
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84 | #define EV_CONN_LISTEN 0x0001 /*%< Connection is a listener. */ |
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85 | #define EV_CONN_SELECTED 0x0002 /*%< evSelectFD(conn->file). */ |
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86 | #define EV_CONN_BLOCK 0x0004 /*%< Listener fd was blocking. */ |
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87 | evFileID file; |
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88 | struct evConn * prev; |
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89 | struct evConn * next; |
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90 | } evConn; |
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91 | |
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92 | #ifndef _LIBC |
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93 | typedef struct evAccept { |
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94 | int fd; |
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95 | union { |
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96 | struct sockaddr sa; |
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97 | struct sockaddr_in in; |
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98 | #ifndef NO_SOCKADDR_UN |
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99 | struct sockaddr_un un; |
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100 | #endif |
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101 | } la; |
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102 | ISC_SOCKLEN_T lalen; |
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103 | union { |
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104 | struct sockaddr sa; |
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105 | struct sockaddr_in in; |
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106 | #ifndef NO_SOCKADDR_UN |
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107 | struct sockaddr_un un; |
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108 | #endif |
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109 | } ra; |
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110 | ISC_SOCKLEN_T ralen; |
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111 | int ioErrno; |
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112 | evConn * conn; |
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113 | LINK(struct evAccept) link; |
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114 | } evAccept; |
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115 | |
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116 | typedef struct evFile { |
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117 | evFileFunc func; |
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118 | void * uap; |
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119 | int fd; |
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120 | int eventmask; |
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121 | int preemptive; |
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122 | struct evFile * prev; |
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123 | struct evFile * next; |
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124 | struct evFile * fdprev; |
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125 | struct evFile * fdnext; |
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126 | } evFile; |
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127 | |
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128 | typedef struct evStream { |
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129 | evStreamFunc func; |
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130 | void * uap; |
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131 | evFileID file; |
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132 | evTimerID timer; |
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133 | int flags; |
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134 | #define EV_STR_TIMEROK 0x0001 /*%< IFF timer valid. */ |
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135 | int fd; |
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136 | struct iovec * iovOrig; |
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137 | int iovOrigCount; |
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138 | struct iovec * iovCur; |
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139 | int iovCurCount; |
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140 | int ioTotal; |
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141 | int ioDone; |
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142 | int ioErrno; |
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143 | struct evStream *prevDone, *nextDone; |
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144 | struct evStream *prev, *next; |
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145 | } evStream; |
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146 | |
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147 | typedef struct evTimer { |
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148 | evTimerFunc func; |
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149 | void * uap; |
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150 | struct timespec due, inter; |
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151 | int index; |
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152 | int mode; |
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153 | #define EV_TMR_RATE 1 |
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154 | } evTimer; |
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155 | |
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156 | typedef struct evWait { |
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157 | evWaitFunc func; |
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158 | void * uap; |
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159 | const void * tag; |
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160 | struct evWait * next; |
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161 | } evWait; |
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162 | |
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163 | typedef struct evWaitList { |
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164 | evWait * first; |
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165 | evWait * last; |
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166 | struct evWaitList * prev; |
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167 | struct evWaitList * next; |
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168 | } evWaitList; |
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169 | |
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170 | typedef struct evEvent_p { |
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171 | enum { Accept, File, Stream, Timer, Wait, Free, Null } type; |
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172 | union { |
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173 | struct { evAccept *this; } accept; |
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174 | struct { evFile *this; int eventmask; } file; |
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175 | struct { evStream *this; } stream; |
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176 | struct { evTimer *this; } timer; |
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177 | struct { evWait *this; } wait; |
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178 | struct { struct evEvent_p *next; } free; |
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179 | struct { const void *placeholder; } null; |
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180 | } u; |
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181 | } evEvent_p; |
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182 | #endif |
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183 | |
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184 | #ifdef USE_POLL |
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185 | typedef struct { |
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186 | void *ctx; /* pointer to the evContext_p */ |
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187 | uint32_t type; /* READ, WRITE, EXCEPT, nonblk */ |
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188 | uint32_t result; /* 1 => revents, 0 => events */ |
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189 | } __evEmulMask; |
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190 | |
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191 | #define emulMaskInit(ctx, field, ev, lastnext) \ |
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192 | ctx->field.ctx = ctx; \ |
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193 | ctx->field.type = ev; \ |
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194 | ctx->field.result = lastnext; |
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195 | |
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196 | extern short *__fd_eventfield(int fd, __evEmulMask *maskp); |
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197 | extern short __poll_event(__evEmulMask *maskp); |
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198 | extern void __fd_clr(int fd, __evEmulMask *maskp); |
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199 | extern void __fd_set(int fd, __evEmulMask *maskp); |
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200 | |
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201 | #undef FD_ZERO |
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202 | #define FD_ZERO(maskp) |
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203 | |
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204 | #undef FD_SET |
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205 | #define FD_SET(fd, maskp) \ |
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206 | __fd_set(fd, maskp) |
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207 | |
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208 | #undef FD_CLR |
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209 | #define FD_CLR(fd, maskp) \ |
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210 | __fd_clr(fd, maskp) |
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211 | |
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212 | #undef FD_ISSET |
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213 | #define FD_ISSET(fd, maskp) \ |
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214 | ((*__fd_eventfield(fd, maskp) & __poll_event(maskp)) != 0) |
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215 | |
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216 | #endif /* USE_POLL */ |
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217 | |
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218 | #ifndef _LIBC |
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219 | typedef struct { |
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220 | /* Global. */ |
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221 | const evEvent_p *cur; |
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222 | /* Debugging. */ |
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223 | int debug; |
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224 | FILE *output; |
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225 | /* Connections. */ |
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226 | evConn *conns; |
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227 | LIST(evAccept) accepts; |
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228 | /* Files. */ |
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229 | evFile *files, *fdNext; |
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230 | #ifndef USE_POLL |
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231 | fd_set rdLast, rdNext; |
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232 | fd_set wrLast, wrNext; |
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233 | fd_set exLast, exNext; |
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234 | fd_set nonblockBefore; |
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235 | int fdMax, fdCount, highestFD; |
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236 | evFile *fdTable[FD_SETSIZE]; |
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237 | #else |
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238 | struct pollfd *pollfds; /* Allocated as needed */ |
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239 | evFile **fdTable; /* Ditto */ |
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240 | int maxnfds; /* # elements in above */ |
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241 | int firstfd; /* First active fd */ |
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242 | int fdMax; /* Last active fd */ |
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243 | int fdCount; /* # fd:s with I/O */ |
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244 | int highestFD; /* max fd allowed by OS */ |
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245 | __evEmulMask rdLast, rdNext; |
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246 | __evEmulMask wrLast, wrNext; |
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247 | __evEmulMask exLast, exNext; |
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248 | __evEmulMask nonblockBefore; |
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249 | #endif /* USE_POLL */ |
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250 | #ifdef EVENTLIB_TIME_CHECKS |
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251 | struct timespec lastSelectTime; |
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252 | int lastFdCount; |
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253 | #endif |
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254 | /* Streams. */ |
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255 | evStream *streams; |
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256 | evStream *strDone, *strLast; |
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257 | /* Timers. */ |
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258 | struct timespec lastEventTime; |
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259 | heap_context timers; |
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260 | /* Waits. */ |
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261 | evWaitList *waitLists; |
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262 | evWaitList waitDone; |
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263 | } evContext_p; |
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264 | |
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265 | /* eventlib.c */ |
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266 | #define evPrintf __evPrintf |
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267 | void evPrintf(const evContext_p *ctx, int level, const char *fmt, ...) |
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268 | ISC_FORMAT_PRINTF(3, 4); |
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269 | |
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270 | #ifdef USE_POLL |
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271 | extern int evPollfdRealloc(evContext_p *ctx, int pollfd_chunk_size, int fd); |
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272 | #endif /* USE_POLL */ |
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273 | |
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274 | /* ev_timers.c */ |
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275 | #define evCreateTimers __evCreateTimers |
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276 | heap_context evCreateTimers(const evContext_p *); |
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277 | #define evDestroyTimers __evDestroyTimers |
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278 | void evDestroyTimers(const evContext_p *); |
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279 | |
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280 | /* ev_waits.c */ |
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281 | #define evFreeWait __evFreeWait |
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282 | evWait *evFreeWait(evContext_p *ctx, evWait *old); |
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283 | #endif |
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284 | |
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285 | /* Global options */ |
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286 | #ifndef _LIBC |
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287 | extern int __evOptMonoTime; |
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288 | #endif |
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289 | |
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290 | #endif /*_EVENTLIB_P_H*/ |
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