1/* 2 * Copyright (c) 2005 by Internet Systems Consortium, Inc. ("ISC") 3 * Copyright (c) 1995-1999 by Internet Software Consortium 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT 15 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18/* eventlib_p.h - private interfaces for eventlib 19 * vix 09sep95 [initial] 20 * 21 * $Id: eventlib_p.h,v 1.3.2.1.4.3 2005/07/28 07:43:20 marka Exp $
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23 */ 24 25#ifndef _EVENTLIB_P_H 26#define _EVENTLIB_P_H 27 28#include <sys/param.h> 29#include <sys/types.h> 30#include <sys/socket.h> 31#include <netinet/in.h> 32#include <sys/un.h> 33 34#define EVENTLIB_DEBUG 1 35 36#include <errno.h> 37#include <fcntl.h> 38#include <stdio.h> 39#include <stdlib.h> 40#include <string.h> 41 42#ifndef _LIBC 43#include <isc/list.h> 44#include <isc/heap.h> 45#include <isc/memcluster.h> 46#endif 47 48#define EV_MASK_ALL (EV_READ | EV_WRITE | EV_EXCEPT) 49#define EV_ERR(e) return (errno = (e), -1) 50#define OK(x) if ((x) < 0) EV_ERR(errno); else (void)NULL 51 52#define NEW(p) if (((p) = memget(sizeof *(p))) != NULL) \ 53 FILL(p); \ 54 else \ 55 (void)NULL; 56#define OKNEW(p) if (!((p) = memget(sizeof *(p)))) { \ 57 errno = ENOMEM; \ 58 return (-1); \ 59 } else \ 60 FILL(p) 61#define FREE(p) memput((p), sizeof *(p)) 62 63#if EVENTLIB_DEBUG 64#define FILL(p) memset((p), 0xF5, sizeof *(p)) 65#else 66#define FILL(p) 67#endif 68 69#ifdef USE_POLL 70#ifdef HAVE_STROPTS_H 71#include <stropts.h> 72#endif 73#include <poll.h> 74#endif /* USE_POLL */ 75 76typedef struct evConn { 77 evConnFunc func; 78 void * uap; 79 int fd; 80 int flags; 81#define EV_CONN_LISTEN 0x0001 /* Connection is a listener. */ 82#define EV_CONN_SELECTED 0x0002 /* evSelectFD(conn->file). */ 83#define EV_CONN_BLOCK 0x0004 /* Listener fd was blocking. */ 84 evFileID file; 85 struct evConn * prev; 86 struct evConn * next; 87} evConn; 88 89#ifndef _LIBC 90typedef struct evAccept { 91 int fd; 92 union { 93 struct sockaddr sa; 94 struct sockaddr_in in; 95#ifndef NO_SOCKADDR_UN 96 struct sockaddr_un un; 97#endif 98 } la; 99 ISC_SOCKLEN_T lalen; 100 union { 101 struct sockaddr sa; 102 struct sockaddr_in in; 103#ifndef NO_SOCKADDR_UN 104 struct sockaddr_un un; 105#endif 106 } ra; 107 ISC_SOCKLEN_T ralen; 108 int ioErrno; 109 evConn * conn; 110 LINK(struct evAccept) link; 111} evAccept; 112 113typedef struct evFile { 114 evFileFunc func; 115 void * uap; 116 int fd; 117 int eventmask; 118 int preemptive; 119 struct evFile * prev; 120 struct evFile * next; 121 struct evFile * fdprev; 122 struct evFile * fdnext; 123} evFile; 124 125typedef struct evStream { 126 evStreamFunc func; 127 void * uap; 128 evFileID file; 129 evTimerID timer; 130 int flags; 131#define EV_STR_TIMEROK 0x0001 /* IFF timer valid. */ 132 int fd; 133 struct iovec * iovOrig; 134 int iovOrigCount; 135 struct iovec * iovCur; 136 int iovCurCount; 137 int ioTotal; 138 int ioDone; 139 int ioErrno; 140 struct evStream *prevDone, *nextDone; 141 struct evStream *prev, *next; 142} evStream; 143 144typedef struct evTimer { 145 evTimerFunc func; 146 void * uap; 147 struct timespec due, inter; 148 int index; 149 int mode; 150#define EV_TMR_RATE 1 151} evTimer; 152 153typedef struct evWait { 154 evWaitFunc func; 155 void * uap; 156 const void * tag; 157 struct evWait * next; 158} evWait; 159 160typedef struct evWaitList { 161 evWait * first; 162 evWait * last; 163 struct evWaitList * prev; 164 struct evWaitList * next; 165} evWaitList; 166 167typedef struct evEvent_p { 168 enum { Accept, File, Stream, Timer, Wait, Free, Null } type; 169 union { 170 struct { evAccept *this; } accept; 171 struct { evFile *this; int eventmask; } file; 172 struct { evStream *this; } stream; 173 struct { evTimer *this; } timer; 174 struct { evWait *this; } wait; 175 struct { struct evEvent_p *next; } free; 176 struct { const void *placeholder; } null; 177 } u; 178} evEvent_p; 179#endif 180 181#ifdef USE_POLL 182typedef struct { 183 void *ctx; /* pointer to the evContext_p */ 184 uint32_t type; /* READ, WRITE, EXCEPT, nonblk */ 185 uint32_t result; /* 1 => revents, 0 => events */ 186} __evEmulMask; 187 188#define emulMaskInit(ctx, field, ev, lastnext) \ 189 ctx->field.ctx = ctx; \ 190 ctx->field.type = ev; \ 191 ctx->field.result = lastnext; 192 193extern short *__fd_eventfield(int fd, __evEmulMask *maskp); 194extern short __poll_event(__evEmulMask *maskp); 195extern void __fd_clr(int fd, __evEmulMask *maskp); 196extern void __fd_set(int fd, __evEmulMask *maskp); 197 198#undef FD_ZERO 199#define FD_ZERO(maskp) 200 201#undef FD_SET 202#define FD_SET(fd, maskp) \ 203 __fd_set(fd, maskp) 204 205#undef FD_CLR 206#define FD_CLR(fd, maskp) \ 207 __fd_clr(fd, maskp) 208 209#undef FD_ISSET 210#define FD_ISSET(fd, maskp) \ 211 ((*__fd_eventfield(fd, maskp) & __poll_event(maskp)) != 0) 212 213#endif /* USE_POLL */ 214 215#ifndef _LIBC 216typedef struct { 217 /* Global. */ 218 const evEvent_p *cur; 219 /* Debugging. */ 220 int debug; 221 FILE *output; 222 /* Connections. */ 223 evConn *conns; 224 LIST(evAccept) accepts; 225 /* Files. */ 226 evFile *files, *fdNext; 227#ifndef USE_POLL 228 fd_set rdLast, rdNext; 229 fd_set wrLast, wrNext; 230 fd_set exLast, exNext; 231 fd_set nonblockBefore; 232 int fdMax, fdCount, highestFD; 233 evFile *fdTable[FD_SETSIZE]; 234#else 235 struct pollfd *pollfds; /* Allocated as needed */ 236 evFile **fdTable; /* Ditto */ 237 int maxnfds; /* # elements in above */ 238 int firstfd; /* First active fd */ 239 int fdMax; /* Last active fd */ 240 int fdCount; /* # fd:s with I/O */ 241 int highestFD; /* max fd allowed by OS */ 242 __evEmulMask rdLast, rdNext; 243 __evEmulMask wrLast, wrNext; 244 __evEmulMask exLast, exNext; 245 __evEmulMask nonblockBefore; 246#endif /* USE_POLL */ 247#ifdef EVENTLIB_TIME_CHECKS 248 struct timespec lastSelectTime; 249 int lastFdCount; 250#endif 251 /* Streams. */ 252 evStream *streams; 253 evStream *strDone, *strLast; 254 /* Timers. */ 255 struct timespec lastEventTime; 256 heap_context timers; 257 /* Waits. */ 258 evWaitList *waitLists; 259 evWaitList waitDone; 260} evContext_p; 261 262/* eventlib.c */ 263#define evPrintf __evPrintf 264void evPrintf(const evContext_p *ctx, int level, const char *fmt, ...) 265 ISC_FORMAT_PRINTF(3, 4); 266 267#ifdef USE_POLL 268extern int evPollfdRealloc(evContext_p *ctx, int pollfd_chunk_size, int fd); 269#endif /* USE_POLL */ 270 271/* ev_timers.c */ 272#define evCreateTimers __evCreateTimers 273heap_context evCreateTimers(const evContext_p *); 274#define evDestroyTimers __evDestroyTimers 275void evDestroyTimers(const evContext_p *); 276 277/* ev_waits.c */ 278#define evFreeWait __evFreeWait 279evWait *evFreeWait(evContext_p *ctx, evWait *old); 280#endif 281 282/* Global options */
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