1 /* $NetBSD: eventlib_p.h,v 1.1.1.2 2012/09/09 16:08:02 christos Exp $ */ 2 3 /* 4 * Copyright (c) 2005 by Internet Systems Consortium, Inc. ("ISC") 5 * Copyright (c) 1995-1999 by Internet Software Consortium 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT 17 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 /*! \file 21 * \brief private interfaces for eventlib 22 * \author vix 09sep95 [initial] 23 * 24 * Id: eventlib_p.h,v 1.9 2006/03/09 23:57:56 marka Exp 25 */ 26 27 #ifndef _EVENTLIB_P_H 28 #define _EVENTLIB_P_H 29 30 #include <sys/param.h> 31 #include <sys/types.h> 32 #include <sys/socket.h> 33 #include <netinet/in.h> 34 #include <sys/un.h> 35 36 #define EVENTLIB_DEBUG 1 37 38 #include <errno.h> 39 #include <fcntl.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 44 #include <isc/heap.h> 45 #include <isc/list.h> 46 #include <isc/memcluster.h> 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 #define OKFREE(x, y) if ((x) < 0) { FREE((y)); EV_ERR(errno); } \ 52 else (void)NULL 53 54 #define NEW(p) if (((p) = memget(sizeof *(p))) != NULL) \ 55 FILL(p); \ 56 else \ 57 (void)NULL; 58 #define OKNEW(p) if (!((p) = memget(sizeof *(p)))) { \ 59 errno = ENOMEM; \ 60 return (-1); \ 61 } else \ 62 FILL(p) 63 #define FREE(p) memput((p), sizeof *(p)) 64 65 #if EVENTLIB_DEBUG 66 #define FILL(p) memset((p), 0xF5, sizeof *(p)) 67 #else 68 #define FILL(p) 69 #endif 70 71 #ifdef USE_POLL 72 #ifdef HAVE_STROPTS_H 73 #include <stropts.h> 74 #endif 75 #include <poll.h> 76 #endif /* USE_POLL */ 77 78 typedef struct evConn { 79 evConnFunc func; 80 void * uap; 81 int fd; 82 int flags; 83 #define EV_CONN_LISTEN 0x0001 /*%< Connection is a listener. */ 84 #define EV_CONN_SELECTED 0x0002 /*%< evSelectFD(conn->file). */ 85 #define EV_CONN_BLOCK 0x0004 /*%< Listener fd was blocking. */ 86 evFileID file; 87 struct evConn * prev; 88 struct evConn * next; 89 } evConn; 90 91 typedef struct evAccept { 92 int fd; 93 union { 94 struct sockaddr sa; 95 struct sockaddr_in in; 96 #ifndef NO_SOCKADDR_UN 97 struct sockaddr_un un; 98 #endif 99 } la; 100 ISC_SOCKLEN_T lalen; 101 union { 102 struct sockaddr sa; 103 struct sockaddr_in in; 104 #ifndef NO_SOCKADDR_UN 105 struct sockaddr_un un; 106 #endif 107 } ra; 108 ISC_SOCKLEN_T ralen; 109 int ioErrno; 110 evConn * conn; 111 LINK(struct evAccept) link; 112 } evAccept; 113 114 typedef struct evFile { 115 evFileFunc func; 116 void * uap; 117 int fd; 118 int eventmask; 119 int preemptive; 120 struct evFile * prev; 121 struct evFile * next; 122 struct evFile * fdprev; 123 struct evFile * fdnext; 124 } evFile; 125 126 typedef struct evStream { 127 evStreamFunc func; 128 void * uap; 129 evFileID file; 130 evTimerID timer; 131 int flags; 132 #define EV_STR_TIMEROK 0x0001 /*%< IFF timer valid. */ 133 int fd; 134 struct iovec * iovOrig; 135 int iovOrigCount; 136 struct iovec * iovCur; 137 int iovCurCount; 138 int ioTotal; 139 int ioDone; 140 int ioErrno; 141 struct evStream *prevDone, *nextDone; 142 struct evStream *prev, *next; 143 } evStream; 144 145 typedef struct evTimer { 146 evTimerFunc func; 147 void * uap; 148 struct timespec due, inter; 149 int index; 150 int mode; 151 #define EV_TMR_RATE 1 152 } evTimer; 153 154 typedef struct evWait { 155 evWaitFunc func; 156 void * uap; 157 const void * tag; 158 struct evWait * next; 159 } evWait; 160 161 typedef struct evWaitList { 162 evWait * first; 163 evWait * last; 164 struct evWaitList * prev; 165 struct evWaitList * next; 166 } evWaitList; 167 168 typedef struct evEvent_p { 169 enum { Accept, File, Stream, Timer, Wait, Free, Null } type; 170 union { 171 struct { evAccept *this; } accept; 172 struct { evFile *this; int eventmask; } file; 173 struct { evStream *this; } stream; 174 struct { evTimer *this; } timer; 175 struct { evWait *this; } wait; 176 struct { struct evEvent_p *next; } free; 177 struct { const void *placeholder; } null; 178 } u; 179 } evEvent_p; 180 181 #ifdef USE_POLL 182 typedef 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; 192 193 extern short *__fd_eventfield(int fd, __evEmulMask *maskp); 194 extern short __poll_event(__evEmulMask *maskp); 195 extern void __fd_clr(int fd, __evEmulMask *maskp); 196 extern 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 typedef struct { 216 /* Global. */ 217 const evEvent_p *cur; 218 /* Debugging. */ 219 int debug; 220 FILE *output; 221 /* Connections. */ 222 evConn *conns; 223 LIST(evAccept) accepts; 224 /* Files. */ 225 evFile *files, *fdNext; 226 #ifndef USE_POLL 227 fd_set rdLast, rdNext; 228 fd_set wrLast, wrNext; 229 fd_set exLast, exNext; 230 fd_set nonblockBefore; 231 int fdMax, fdCount, highestFD; 232 evFile *fdTable[FD_SETSIZE]; 233 #else 234 struct pollfd *pollfds; /* Allocated as needed */ 235 evFile **fdTable; /* Ditto */ 236 int maxnfds; /* # elements in above */ 237 int firstfd; /* First active fd */ 238 int fdMax; /* Last active fd */ 239 int fdCount; /* # fd:s with I/O */ 240 int highestFD; /* max fd allowed by OS */ 241 __evEmulMask rdLast, rdNext; 242 __evEmulMask wrLast, wrNext; 243 __evEmulMask exLast, exNext; 244 __evEmulMask nonblockBefore; 245 #endif /* USE_POLL */ 246 #ifdef EVENTLIB_TIME_CHECKS 247 struct timespec lastSelectTime; 248 int lastFdCount; 249 #endif 250 /* Streams. */ 251 evStream *streams; 252 evStream *strDone, *strLast; 253 /* Timers. */ 254 struct timespec lastEventTime; 255 heap_context timers; 256 /* Waits. */ 257 evWaitList *waitLists; 258 evWaitList waitDone; 259 } evContext_p; 260 261 /* eventlib.c */ 262 #define evPrintf __evPrintf 263 void evPrintf(const evContext_p *ctx, int level, const char *fmt, ...) 264 ISC_FORMAT_PRINTF(3, 4); 265 266 #ifdef USE_POLL 267 extern int evPollfdRealloc(evContext_p *ctx, int pollfd_chunk_size, int fd); 268 #endif /* USE_POLL */ 269 270 /* ev_timers.c */ 271 #define evCreateTimers __evCreateTimers 272 heap_context evCreateTimers(const evContext_p *); 273 #define evDestroyTimers __evDestroyTimers 274 void evDestroyTimers(const evContext_p *); 275 276 /* ev_waits.c */ 277 #define evFreeWait __evFreeWait 278 evWait *evFreeWait(evContext_p *ctx, evWait *old); 279 280 /* Global options */ 281 extern int __evOptMonoTime; 282 283 #endif /*_EVENTLIB_P_H*/ 284