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 /*! \file 19 * \brief private interfaces for eventlib 20 * \author vix 09sep95 [initial] 21 * 22 * $Id: eventlib_p.h,v 1.9 2006/03/09 23:57:56 marka Exp $ 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/heap.h> 44 #include <isc/list.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 #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 #ifndef _LIBC 92 typedef struct evAccept { 93 int fd; 94 union { 95 struct sockaddr sa; 96 struct sockaddr_in in; 97 #ifndef NO_SOCKADDR_UN 98 struct sockaddr_un un; 99 #endif 100 } la; 101 ISC_SOCKLEN_T lalen; 102 union { 103 struct sockaddr sa; 104 struct sockaddr_in in; 105 #ifndef NO_SOCKADDR_UN 106 struct sockaddr_un un; 107 #endif 108 } ra; 109 ISC_SOCKLEN_T ralen; 110 int ioErrno; 111 evConn * conn; 112 LINK(struct evAccept) link; 113 } evAccept; 114 115 typedef struct evFile { 116 evFileFunc func; 117 void * uap; 118 int fd; 119 int eventmask; 120 int preemptive; 121 struct evFile * prev; 122 struct evFile * next; 123 struct evFile * fdprev; 124 struct evFile * fdnext; 125 } evFile; 126 127 typedef struct evStream { 128 evStreamFunc func; 129 void * uap; 130 evFileID file; 131 evTimerID timer; 132 int flags; 133 #define EV_STR_TIMEROK 0x0001 /*%< IFF timer valid. */ 134 int fd; 135 struct iovec * iovOrig; 136 int iovOrigCount; 137 struct iovec * iovCur; 138 int iovCurCount; 139 int ioTotal; 140 int ioDone; 141 int ioErrno; 142 struct evStream *prevDone, *nextDone; 143 struct evStream *prev, *next; 144 } evStream; 145 146 typedef struct evTimer { 147 evTimerFunc func; 148 void * uap; 149 struct timespec due, inter; 150 int index; 151 int mode; 152 #define EV_TMR_RATE 1 153 } evTimer; 154 155 typedef struct evWait { 156 evWaitFunc func; 157 void * uap; 158 const void * tag; 159 struct evWait * next; 160 } evWait; 161 162 typedef struct evWaitList { 163 evWait * first; 164 evWait * last; 165 struct evWaitList * prev; 166 struct evWaitList * next; 167 } evWaitList; 168 169 typedef struct evEvent_p { 170 enum { Accept, File, Stream, Timer, Wait, Free, Null } type; 171 union { 172 struct { evAccept *this; } accept; 173 struct { evFile *this; int eventmask; } file; 174 struct { evStream *this; } stream; 175 struct { evTimer *this; } timer; 176 struct { evWait *this; } wait; 177 struct { struct evEvent_p *next; } free; 178 struct { const void *placeholder; } null; 179 } u; 180 } evEvent_p; 181 #endif /* !_LIBC */ 182 183 #ifdef USE_POLL 184 typedef struct { 185 void *ctx; /* pointer to the evContext_p */ 186 uint32_t type; /* READ, WRITE, EXCEPT, nonblk */ 187 uint32_t result; /* 1 => revents, 0 => events */ 188 } __evEmulMask; 189 190 #define emulMaskInit(ctx, field, ev, lastnext) \ 191 ctx->field.ctx = ctx; \ 192 ctx->field.type = ev; \ 193 ctx->field.result = lastnext; 194 195 extern short *__fd_eventfield(int fd, __evEmulMask *maskp); 196 extern short __poll_event(__evEmulMask *maskp); 197 extern void __fd_clr(int fd, __evEmulMask *maskp); 198 extern void __fd_set(int fd, __evEmulMask *maskp); 199 200 #undef FD_ZERO 201 #define FD_ZERO(maskp) 202 203 #undef FD_SET 204 #define FD_SET(fd, maskp) \ 205 __fd_set(fd, maskp) 206 207 #undef FD_CLR 208 #define FD_CLR(fd, maskp) \ 209 __fd_clr(fd, maskp) 210 211 #undef FD_ISSET 212 #define FD_ISSET(fd, maskp) \ 213 ((*__fd_eventfield(fd, maskp) & __poll_event(maskp)) != 0) 214 215 #endif /* USE_POLL */ 216 217 #ifndef _LIBC 218 typedef struct { 219 /* Global. */ 220 const evEvent_p *cur; 221 /* Debugging. */ 222 int debug; 223 FILE *output; 224 /* Connections. */ 225 evConn *conns; 226 LIST(evAccept) accepts; 227 /* Files. */ 228 evFile *files, *fdNext; 229 #ifndef USE_POLL 230 fd_set rdLast, rdNext; 231 fd_set wrLast, wrNext; 232 fd_set exLast, exNext; 233 fd_set nonblockBefore; 234 int fdMax, fdCount, highestFD; 235 evFile *fdTable[FD_SETSIZE]; 236 #else 237 struct pollfd *pollfds; /* Allocated as needed */ 238 evFile **fdTable; /* Ditto */ 239 int maxnfds; /* # elements in above */ 240 int firstfd; /* First active fd */ 241 int fdMax; /* Last active fd */ 242 int fdCount; /* # fd:s with I/O */ 243 int highestFD; /* max fd allowed by OS */ 244 __evEmulMask rdLast, rdNext; 245 __evEmulMask wrLast, wrNext; 246 __evEmulMask exLast, exNext; 247 __evEmulMask nonblockBefore; 248 #endif /* USE_POLL */ 249 #ifdef EVENTLIB_TIME_CHECKS 250 struct timespec lastSelectTime; 251 int lastFdCount; 252 #endif 253 /* Streams. */ 254 evStream *streams; 255 evStream *strDone, *strLast; 256 /* Timers. */ 257 struct timespec lastEventTime; 258 heap_context timers; 259 /* Waits. */ 260 evWaitList *waitLists; 261 evWaitList waitDone; 262 } evContext_p; 263 264 /* eventlib.c */ 265 #define evPrintf __evPrintf 266 void evPrintf(const evContext_p *ctx, int level, const char *fmt, ...) 267 ISC_FORMAT_PRINTF(3, 4); 268 269 #ifdef USE_POLL 270 extern int evPollfdRealloc(evContext_p *ctx, int pollfd_chunk_size, int fd); 271 #endif /* USE_POLL */ 272 273 /* ev_timers.c */ 274 #define evCreateTimers __evCreateTimers 275 heap_context evCreateTimers(const evContext_p *); 276 #define evDestroyTimers __evDestroyTimers 277 void evDestroyTimers(const evContext_p *); 278 279 /* ev_waits.c */ 280 #define evFreeWait __evFreeWait 281 evWait *evFreeWait(evContext_p *ctx, evWait *old); 282 #endif /* !_LIBC */ 283 284 /* Global options */ 285 #ifndef _LIBC 286 extern int __evOptMonoTime; 287 #endif /* !_LIBC */ 288 289 #endif /*_EVENTLIB_P_H*/ 290