Annotation of libwww/Library/src/HTEvtLst.c, revision 2.42
2.4 eric 1: /* HTEvtLst.c
2.1 frystyk 2: ** EVENT MANAGER
3: **
4: ** (c) COPYRIGHT MIT 1995.
5: ** Please first read the full copyright statement in the file COPYRIGH.
2.42 ! kahan 6: ** @(#) $Id: HTEvtLst.c,v 2.41 1999/07/07 15:43:28 frystyk Exp $
2.1 frystyk 7: **
8: ** Updated HTEvent module
9: ** This new module combines the functions of the old HTEvent module and
10: ** the HTThread module. We retain the old HTThread module, but it
11: ** consists of calls to the HTEvent interfaces
12: **
13: ** Authors:
14: ** HFN Henrik Frystyk <frystyk@w3.org>
15: ** CLB Charlie Brooks <cbrooks@osf.org>
16: ** Bugs
17: **
18: */
19:
20: /* WSAAsyncSelect and windows app stuff need the following definitions:
21: * WWW_WIN_ASYNC - enable WSAAsyncSelect instead of select
22: * _WIN23 - win32 libararies - may be window or console app
23: * _WINSOCKAPI_ - using WINSOCK.DLL - not necessarily the async routines.
24: * _CONSOLE - the console app for NT
25: *
26: * first pass: EGP - 10/26/95
27: */
28:
29: /* Implementation dependent include files */
2.21 frystyk 30: #include "wwwsys.h"
2.1 frystyk 31: #include "WWWUtil.h"
32: #include "WWWCore.h"
33: #include "HTReqMan.h"
34: #include "HTTimer.h"
2.5 eric 35: #include "HTEvent.h"
2.1 frystyk 36: #include "HTEvtLst.h" /* Implemented here */
37:
38: /* Type definitions and global variables etc. local to this module */
39: #define MILLI_PER_SECOND 1000
2.32 frystyk 40: #define HASH(s) ((s) % HT_M_HASH_SIZE)
2.34 frystyk 41:
2.32 frystyk 42: #define EVENTS_TO_EXECUTE 10 /* how many to execute in one select loop */
2.1 frystyk 43:
2.34 frystyk 44: #define HT_FS_BYTES(a) ((((a)/16)+1) * 4)
2.15 frystyk 45:
2.3 eric 46: typedef struct {
47: SOCKET s ; /* our socket */
48: HTEvent * events[HTEvent_TYPES]; /* event parameters for read, write, oob */
2.5 eric 49: HTTimer * timeouts[HTEvent_TYPES];
2.3 eric 50: } SockEvents;
51:
2.34 frystyk 52: typedef struct {
53: HTEvent * event;
54: SOCKET s;
55: HTEventType type;
56: HTPriority skipped;
57: } EventOrder;
58:
2.3 eric 59: typedef enum {
60: SockEvents_mayCreate,
61: SockEvents_find
62: } SockEvents_action;
2.1 frystyk 63:
2.34 frystyk 64: PRIVATE HTList * HashTable [HT_M_HASH_SIZE];
65: PRIVATE HTList * EventOrderList = NULL;
2.1 frystyk 66: PRIVATE int HTEndLoop = 0; /* If !0 then exit event loop */
2.41 frystyk 67: PRIVATE BOOL HTInLoop = NO;
2.1 frystyk 68:
2.34 frystyk 69: #ifdef WWW_WIN_ASYNC
70: #define TIMEOUT 1 /* WM_TIMER id */
71: PRIVATE HWND HTSocketWin;
72: PRIVATE ATOM HTclass;
73: PRIVATE HINSTANCE HTinstance;
74: PRIVATE unsigned long HTwinMsg;
75: #else /* WWW_WIN_ASYNC */
76: PRIVATE fd_set FdArray[HTEvent_TYPES];
77: PRIVATE SOCKET MaxSock = 0; /* max socket value in use */
78: #endif /* !WWW_WIN_ASYNC */
79:
80: /* ------------------------------------------------------------------------- */
81: /* DEBUG FUNCTIONS */
2.1 frystyk 82: /* ------------------------------------------------------------------------- */
83:
2.36 frystyk 84: #ifdef HTDEBUG
2.34 frystyk 85: PRIVATE void Event_trace (HTEvent * event)
2.8 frystyk 86: {
2.34 frystyk 87: if (event) {
2.36 frystyk 88: HTTRACE(ALL_TRACE, "%8p: %3d %6d %8p %8p %8p" _
89: event _ event->priority _ event->millis _ event->cbf _
90: event->param _ event->request);
2.34 frystyk 91: }
2.8 frystyk 92: }
93:
2.34 frystyk 94: PRIVATE void Event_traceHead (void)
2.8 frystyk 95: {
2.36 frystyk 96: HTTRACE(ALL_TRACE, " event: pri millis callback param request ");
2.8 frystyk 97: }
98:
2.34 frystyk 99: PRIVATE void Timer_trace (HTTimer * timer)
2.1 frystyk 100: {
2.34 frystyk 101: if (timer) {
2.36 frystyk 102: HTTRACE(ALL_TRACE, "%8p: %6d %ld %c %8p" _
103: timer _
104: HTTimer_expiresAbsolute(timer) _
105: HTTimer_expiresRelative(timer) _
106: HTTimer_isRelative(timer) ? 'R' : 'A' _
2.34 frystyk 107: HTTimer_callback(timer));
2.1 frystyk 108: }
109: }
110:
2.34 frystyk 111: PRIVATE void Timer_traceHead (void)
2.3 eric 112: {
2.36 frystyk 113: HTTRACE(ALL_TRACE, " timer: millis expires ? param callback ");
2.3 eric 114: }
2.34 frystyk 115:
2.1 frystyk 116: /*
117: ** A simple debug function that dumps all the socket arrays
118: ** as trace messages
119: */
2.3 eric 120: PRIVATE void EventList_dump (void)
2.1 frystyk 121: {
2.18 frystyk 122: int v = 0;
2.3 eric 123: HTList* cur;
124: SockEvents * pres;
2.36 frystyk 125: HTTRACE(ALL_TRACE, "Event....... Dumping socket events\n");
126: HTTRACE(ALL_TRACE, "soc ");
2.34 frystyk 127: Event_traceHead();
2.36 frystyk 128: HTTRACE(ALL_TRACE, " ");
2.34 frystyk 129: Timer_traceHead();
2.36 frystyk 130: HTTRACE(ALL_TRACE, "\n");
2.32 frystyk 131: for (v = 0; v < HT_M_HASH_SIZE; v++) {
2.3 eric 132: cur = HashTable[v];
133: while ((pres = (SockEvents *) HTList_nextObject(cur))) {
134: int i;
2.36 frystyk 135: HTTRACE(ALL_TRACE, "%3d \n" _ pres->s);
2.3 eric 136: for (i = 0; i < HTEvent_TYPES; i++)
137: if (pres->events[i]) {
138: static char * names[HTEvent_TYPES] = {"read", "writ", "xcpt"};
2.36 frystyk 139: HTTRACE(ALL_TRACE, "%s " _ names[i]);
2.34 frystyk 140: Event_trace(pres->events[i]);
2.36 frystyk 141: HTTRACE(ALL_TRACE, " ");
2.34 frystyk 142: Timer_trace(pres->timeouts[i]);
2.36 frystyk 143: HTTRACE(ALL_TRACE, " ");
2.3 eric 144: }
2.36 frystyk 145: HTTRACE(ALL_TRACE, "\n");
2.3 eric 146: }
147: }
2.1 frystyk 148: }
2.37 frystyk 149:
150: PRIVATE void fd_dump (SOCKET maxfs, fd_set * rset, fd_set * wset, fd_set * oset,
151: struct timeval * wt)
152: {
153: SOCKET cnt;
154:
155: /* Check read set */
156: HTTRACE(THD_TRACE, "............ READ :");
157: for (cnt=0; cnt<=maxfs; cnt++)
158: if (FD_ISSET(cnt, rset)) HTTRACE(THD_TRACE, " %d" _ cnt);
159: HTTRACE(THD_TRACE, "\n");
160:
161: /* Check write set */
162: HTTRACE(THD_TRACE, "............ WRITE:");
163: for (cnt=0; cnt<=maxfs; cnt++)
164: if (FD_ISSET(cnt, wset)) HTTRACE(THD_TRACE, " %d" _ cnt);
165: HTTRACE(THD_TRACE, "\n");
166:
167: /* Check oob set */
168: HTTRACE(THD_TRACE, "............ OOB :");
169: for (cnt=0; cnt<=maxfs; cnt++)
170: if (FD_ISSET(cnt, oset)) HTTRACE(THD_TRACE, " %d" _ cnt);
171: HTTRACE(THD_TRACE, "\n");
172:
173: if (wt)
2.38 frystyk 174: HTTRACE(THD_TRACE, "............ Timeout is %ld s, %ld microsecs\n" _
2.37 frystyk 175: wt->tv_sec _ wt->tv_usec);
176: }
2.36 frystyk 177: #endif /* HTDEBUG */
2.1 frystyk 178:
179: /* ------------------------------------------------------------------------- */
2.34 frystyk 180: /* EVENT TIMING FUNCTIONS */
181: /* ------------------------------------------------------------------------- */
182:
183: #ifdef WWW_WIN_ASYNC
184: PRIVATE BOOL Timer_setWindowsTimer (HTTimer * timer)
185: {
186: UINT id;
2.39 frystyk 187: HWND hwnd = HTEventList_getWinHandle(&id);
188: BOOL status = (SetTimer(hwnd, (UINT)timer, (UINT)HTTimer_getTime(timer), NULL) == 0) ? NO : YES;
189: return status;
2.34 frystyk 190: }
191:
192: PRIVATE BOOL Timer_deleteWindowsTimer (HTTimer * timer)
193: {
194: UINT id;
2.39 frystyk 195: HWND hwnd = HTEventList_getWinHandle(&id);
196: BOOL status = (KillTimer(hwnd, (UINT)timer) == 0) ? NO : YES;
197: return status;
2.34 frystyk 198: }
199: #endif /* WWW_WIN_ASYNC */
200:
201: /*
202: ** Event timeout handler
203: ** If an event didn't occur before the timeout then call it explicitly
204: ** indicating that it timed out.
205: */
2.5 eric 206: PRIVATE int EventListTimerHandler (HTTimer * timer, void * param, HTEventType type)
207: {
2.11 frystyk 208: SockEvents * sockp = (SockEvents *) param;
209: HTEvent * event = NULL;
2.34 frystyk 210:
211: /* Check for read timeout */
212: if (sockp->timeouts[HTEvent_INDEX(HTEvent_READ)] == timer) {
2.5 eric 213: event = sockp->events[HTEvent_INDEX(HTEvent_READ)];
2.36 frystyk 214: HTTRACE(THD_TRACE, "Event....... READ timed out on %d.\n" _ sockp->s);
2.5 eric 215: return (*event->cbf) (sockp->s, event->param, HTEvent_TIMEOUT);
216: }
2.34 frystyk 217:
218: /* Check for write timeout */
219: if (sockp->timeouts[HTEvent_INDEX(HTEvent_WRITE)] == timer) {
2.5 eric 220: event = sockp->events[HTEvent_INDEX(HTEvent_WRITE)];
2.36 frystyk 221: HTTRACE(THD_TRACE, "Event....... WRITE timed out on %d.\n" _ sockp->s);
2.5 eric 222: return (*event->cbf) (sockp->s, event->param, HTEvent_TIMEOUT);
223: }
2.34 frystyk 224:
225: /* Check for out-of-band data timeout */
226: if (sockp->timeouts[HTEvent_INDEX(HTEvent_OOB)] == timer) {
2.5 eric 227: event = sockp->events[HTEvent_INDEX(HTEvent_OOB)];
2.36 frystyk 228: HTTRACE(THD_TRACE, "Event....... OOB timed out on %d.\n" _ sockp->s);
2.5 eric 229: return (*event->cbf) (sockp->s, event->param, HTEvent_TIMEOUT);
230: }
2.36 frystyk 231: HTTRACE(THD_TRACE, "Event....... No event for timer %p with context %p\n" _ timer _ param);
2.5 eric 232: return HT_ERROR;
233: }
234:
2.34 frystyk 235: PUBLIC void CheckSockEvent (HTTimer * timer, HTTimerCallback * cbf, void * param)
236: {
237: SockEvents * sockp = (SockEvents *)param;
238: if (cbf == EventListTimerHandler &&
239: sockp->timeouts[0] != timer &&
240: sockp->timeouts[1] != timer &&
241: sockp->timeouts[2] != timer) {
2.36 frystyk 242: HTDEBUGBREAK("Bad timer %p\n" _ timer);
2.34 frystyk 243: }
244: }
245:
246: /* ------------------------------------------------------------------------- */
247: /* EVENT ORDERING STUFF */
2.5 eric 248: /* ------------------------------------------------------------------------- */
2.1 frystyk 249:
2.34 frystyk 250: PRIVATE SockEvents * SockEvents_get (SOCKET s, SockEvents_action action)
2.2 eric 251: {
2.34 frystyk 252: long v = HASH(s);
253: HTList* cur;
254: SockEvents * pres;
255: if (HashTable[v] == NULL) HashTable[v] = HTList_new();
256: cur = HashTable[v];
257: while ((pres = (SockEvents *) HTList_nextObject(cur)))
258: if (pres->s == s) return pres;
259:
260: if (action == SockEvents_mayCreate) {
261: if ((pres = (SockEvents *) HT_CALLOC(1, sizeof(SockEvents))) == NULL)
262: HT_OUTOFMEM("HTEventList_register");
263: pres->s = s;
264: HTList_addObject(HashTable[v], (void *)pres);
265: return pres;
266: }
267: return NULL;
2.2 eric 268: }
269:
2.34 frystyk 270: PRIVATE int EventOrder_add (SOCKET s, HTEventType type, ms_t now)
2.2 eric 271: {
272: EventOrder * pres;
273: HTList * cur = EventOrderList;
274: HTList * insertAfter = cur;
2.5 eric 275: SockEvents * sockp = SockEvents_get(s, SockEvents_find);
276: HTEvent * event;
2.2 eric 277:
2.5 eric 278: if (sockp == NULL || (event = sockp->events[HTEvent_INDEX(type)]) == NULL) {
2.36 frystyk 279: HTTRACE(THD_TRACE, "EventOrder.. no event found for socket %d, type %s.\n" _
280: s _ HTEvent_type2str(type));
2.2 eric 281: return HT_ERROR;
282: }
283:
2.34 frystyk 284: /* Fixup the timeout */
2.5 eric 285: if (sockp->timeouts[HTEvent_INDEX(type)])
286: HTTimer_refresh(sockp->timeouts[HTEvent_INDEX(type)], now);
287:
2.34 frystyk 288: /* Look to see if it's already here from before */
2.2 eric 289: while ((pres = (EventOrder *) HTList_nextObject(cur))) {
290: if (pres->s == s && pres->event == event && pres->type == type) {
291: pres->skipped++;
292: return HT_OK;
293: }
294: if (pres->event->priority+pres->skipped > event->priority)
295: insertAfter = cur;
296: }
297:
2.34 frystyk 298: /* Create a new element */
2.2 eric 299: if ((pres = (EventOrder *) HT_CALLOC(1, sizeof(EventOrder))) == NULL)
300: HT_OUTOFMEM("EventOrder_add");
301: pres->event = event;
302: pres->s = s;
303: pres->type = type;
304: HTList_addObject(insertAfter, (void *)pres);
305: return HT_OK;
306: }
307:
308: PUBLIC int EventOrder_executeAndDelete (void)
309: {
2.4 eric 310: HTList * cur = EventOrderList;
2.2 eric 311: EventOrder * pres;
312: int i = 0;
2.36 frystyk 313: HTTRACE(THD_TRACE, "EventOrder.. execute ordered events\n");
2.4 eric 314: if (cur == NULL) return NO;
2.34 frystyk 315: while ((pres=(EventOrder *) HTList_removeLastObject(cur)) && i<EVENTS_TO_EXECUTE) {
2.5 eric 316: HTEvent * event = pres->event;
317: int ret;
2.36 frystyk 318: HTTRACE(THD_TRACE, "EventList... calling socket %d, request %p handler %p type %s\n" _
319: pres->s _ (void *) event->request _
320: (void *) event->cbf _ HTEvent_type2str(pres->type));
2.5 eric 321: ret = (*pres->event->cbf)(pres->s, pres->event->param, pres->type);
2.2 eric 322: HT_FREE(pres);
2.34 frystyk 323: if (ret != HT_OK) return ret;
2.2 eric 324: i++;
325: }
326: return HT_OK;
327: }
328:
2.41 frystyk 329: PRIVATE BOOL EventOrder_clearAll (void)
2.2 eric 330: {
331: HTList * cur = EventOrderList;
332: EventOrder * pres;
2.41 frystyk 333: HTTRACE(THD_TRACE, "EventOrder.. Clearing all ordered events\n");
334: if (cur) {
335: while ((pres = (EventOrder *) HTList_nextObject(cur)))
336: HT_FREE(pres);
337: return YES;
338: }
339: return NO;
340: }
341:
342: PUBLIC BOOL EventOrder_deleteAll (void)
343: {
344: EventOrder_clearAll();
2.2 eric 345: HTList_delete(EventOrderList);
346: EventOrderList = NULL;
347: return YES;
348: }
349:
350: /* ------------------------------------------------------------------------- */
2.34 frystyk 351: /* EVENT REGISTRATION */
352: /* ------------------------------------------------------------------------- */
2.1 frystyk 353:
354: /*
2.15 frystyk 355: ** ResetMaxSock - reset the value of the maximum socket in use
356: */
2.17 frystyk 357: #ifndef WWW_WIN_ASYNC
2.15 frystyk 358: PRIVATE void __ResetMaxSock (void)
359: {
360: SOCKET cnt;
361: SOCKET t_max = 0;
362: SOCKET old_max = MaxSock;
363: for (cnt = 0 ; cnt <= MaxSock; cnt++) {
364: if (FD_ISSET(cnt, (FdArray + HTEvent_INDEX(HTEvent_READ))) ||
365: FD_ISSET(cnt, (FdArray + HTEvent_INDEX(HTEvent_WRITE))) ||
366: FD_ISSET(cnt, (FdArray + HTEvent_INDEX(HTEvent_OOB))))
367: if (cnt > t_max) t_max = cnt;
368: }
369: MaxSock = t_max+1;
2.36 frystyk 370: HTTRACE(THD_TRACE, "Event....... Reset MaxSock from %u to %u\n" _ old_max _ MaxSock);
2.15 frystyk 371: return;
372: }
2.17 frystyk 373: #endif /* !WWW_WIN_ASYNC */
2.15 frystyk 374:
2.34 frystyk 375: PRIVATE int EventList_remaining (SockEvents * pres)
2.19 frystyk 376: {
377: int ret = 0;
378: int i;
379: for (i = 0; i < HTEvent_TYPES; i++)
380: if (pres->events[i] != NULL)
381: ret |= 1<<i;
382: return ret;
383: }
384:
2.15 frystyk 385: /*
2.1 frystyk 386: ** For a given socket, reqister a request structure, a set of operations,
387: ** a HTEventCallback function, and a priority. For this implementation,
388: ** we allow only a single HTEventCallback function for all operations.
389: ** and the priority field is ignored.
390: */
391: PUBLIC int HTEventList_register (SOCKET s, HTEventType type, HTEvent * event)
392: {
2.19 frystyk 393: int newset = 0;
2.3 eric 394: SockEvents * sockp;
2.36 frystyk 395: HTTRACE(THD_TRACE, "Event....... Register socket %d, request %p handler %p type %s at priority %d\n" _
396: s _ (void *) event->request _
397: (void *) event->cbf _ HTEvent_type2str(type) _
2.1 frystyk 398: (unsigned) event->priority);
2.4 eric 399: if (s==INVSOC || HTEvent_INDEX(type) >= HTEvent_TYPES)
2.1 frystyk 400: return 0;
401:
402: /*
403: ** Insert socket into appropriate file descriptor set. We also make sure
404: ** that it is registered in the global set.
405: */
2.36 frystyk 406: HTTRACE(THD_TRACE, "Event....... Registering socket for %s\n" _ HTEvent_type2str(type));
2.3 eric 407: sockp = SockEvents_get(s, SockEvents_mayCreate);
408: sockp->s = s;
409: sockp->events[HTEvent_INDEX(type)] = event;
2.19 frystyk 410: newset = EventList_remaining(sockp);
2.3 eric 411: #ifdef WWW_WIN_ASYNC
2.19 frystyk 412: if (WSAAsyncSelect(s, HTSocketWin, HTwinMsg, HTEvent_BITS(newset)) < 0) {
2.36 frystyk 413: HTTRACE(THD_TRACE, "Event....... WSAAsyncSelect returned `%s'!" _ HTErrnoString(socerrno));
2.3 eric 414: return HT_ERROR;
2.19 frystyk 415: }
2.3 eric 416: #else /* WWW_WIN_ASYNC */
2.1 frystyk 417: FD_SET(s, FdArray+HTEvent_INDEX(type));
2.36 frystyk 418:
419: HTTRACEDATA((char *) FdArray+HTEvent_INDEX(type), 8, "HTEventList_register: (s:%d)" _ s);
420:
2.15 frystyk 421: if (s > MaxSock) {
422: MaxSock = s ;
2.36 frystyk 423: HTTRACE(THD_TRACE, "Event....... New value for MaxSock is %d\n" _ MaxSock);
2.15 frystyk 424: }
2.3 eric 425: #endif /* !WWW_WIN_ASYNC */
2.11 frystyk 426:
2.1 frystyk 427: /*
2.11 frystyk 428: ** If the timeout has been set (relative in millis) then we register
429: ** a new timeout for this event unless we already have a timer.
2.1 frystyk 430: */
431: if (event->millis >= 0) {
2.11 frystyk 432: sockp->timeouts[HTEvent_INDEX(type)] =
433: HTTimer_new(sockp->timeouts[HTEvent_INDEX(type)],
2.22 frystyk 434: EventListTimerHandler, sockp, event->millis, YES, YES);
2.1 frystyk 435: }
436:
437: return HT_OK;
438: }
439:
440: /*
441: ** Remove the registered information for the specified socket for the actions
442: ** specified in ops. if no actions remain after the unregister, the registered
443: ** info is deleted, and, if the socket has been registered for notification,
444: ** the HTEventCallback will be invoked.
445: */
2.34 frystyk 446: PUBLIC int HTEventList_unregister (SOCKET s, HTEventType type)
2.1 frystyk 447: {
2.3 eric 448: long v = HASH(s);
449: HTList * cur = HashTable[v];
450: HTList * last = cur;
451: SockEvents * pres;
2.9 eric 452: int ret = HT_ERROR;
2.2 eric 453:
2.9 eric 454: while (cur && (pres = (SockEvents *) HTList_nextObject(cur))) {
2.2 eric 455: if (pres->s == s) {
2.19 frystyk 456: int remaining = 0;
2.1 frystyk 457:
458: /*
459: ** Unregister the event from this action
460: */
2.2 eric 461: pres->events[HTEvent_INDEX(type)] = NULL;
2.19 frystyk 462: remaining = EventList_remaining(pres);
2.1 frystyk 463:
464: /*
465: ** Check to see of there was a timeout connected with the event.
466: ** If so then delete the timeout as well.
467: */
468: {
2.2 eric 469: HTTimer * timer = pres->timeouts[HTEvent_INDEX(type)];
2.19 frystyk 470: if (timer) HTTimer_delete(timer);
471: pres->timeouts[HTEvent_INDEX(type)] = NULL;
2.1 frystyk 472: }
473:
2.18 frystyk 474: #ifdef WWW_WIN_ASYNC
475: if (WSAAsyncSelect(s, HTSocketWin, HTwinMsg, remaining) < 0)
476: ret = HT_ERROR;
477: #else /* WWW_WIN_ASYNC */
478: FD_CLR(s, FdArray+HTEvent_INDEX(type));
2.36 frystyk 479:
480: HTTRACEDATA((char*)FdArray+HTEvent_INDEX(type), 8, "HTEventList_unregister: (s:%d)" _ s);
481:
2.18 frystyk 482: #endif /* !WWW_WIN_ASYNC */
483:
2.1 frystyk 484: /*
485: ** Check to see if we can delete the action completely. We do this
486: ** if there are no more events registered.
487: */
2.19 frystyk 488: if (remaining == 0) {
2.9 eric 489: HTList * doomed = cur;
2.36 frystyk 490: HTTRACE(THD_TRACE, "Event....... No more events registered for socket %d\n" _ s);
2.15 frystyk 491:
492: #ifndef WWW_WIN_ASYNC
493: /* Check to see if we have to update MaxSock */
2.34 frystyk 494: if (pres->s >= MaxSock) __ResetMaxSock();
2.15 frystyk 495: #endif /* !WWW_WIN_ASYNC */
496:
2.2 eric 497: HT_FREE(pres);
2.9 eric 498: pres = (SockEvents *) HTList_nextObject(cur);
499: HTList_quickRemoveElement(doomed, last);
500: }
501: ret = HT_OK;
2.15 frystyk 502:
2.36 frystyk 503: HTTRACE(THD_TRACE, "Event....... Socket %d unregistered for %s\n" _ s _
2.18 frystyk 504: HTEvent_type2str(type));
2.15 frystyk 505:
2.34 frystyk 506: /* We found the socket and can break */
2.15 frystyk 507: break;
2.9 eric 508: }
509: last = cur;
2.1 frystyk 510: }
2.34 frystyk 511: if (THD_TRACE) {
512: if (ret == HT_ERROR)
2.36 frystyk 513: HTTRACE(THD_TRACE, "Event....... Couldn't find socket %d. Can't unregister type %s\n" _
514: s _ HTEvent_type2str(type));
2.34 frystyk 515: }
2.9 eric 516: return ret;
2.1 frystyk 517: }
518:
519: /*
520: ** Unregister all sockets
521: ** N.B. we just remove them for our internal data structures: it is up to the
522: ** application to actually close the socket.
523: */
2.2 eric 524: PUBLIC int HTEventList_unregisterAll (void)
2.1 frystyk 525: {
526: int i;
2.36 frystyk 527: HTTRACE(THD_TRACE, "Unregister.. all sockets\n");
2.32 frystyk 528: for (i = 0 ; i < HT_M_HASH_SIZE; i++) {
2.2 eric 529: HTList * cur = HashTable[i];
2.3 eric 530: SockEvents * pres;
531: while ((pres = (SockEvents *) HTList_nextObject(cur))) {
532: #ifdef WWW_WIN_ASYNC
533: WSAAsyncSelect(pres->s, HTSocketWin, HTwinMsg, 0);
534: #endif /* WWW_WIN_ASYNC */
2.2 eric 535: HT_FREE(pres);
2.3 eric 536: }
2.2 eric 537: HTList_delete(HashTable[i]);
538: HashTable[i] = NULL;
2.1 frystyk 539: }
2.34 frystyk 540:
2.3 eric 541: #ifndef WWW_WIN_ASYNC
542: MaxSock = 0 ;
2.36 frystyk 543: HTTRACE(THD_TRACE, "Event....... New value for MaxSock is %d\n" _ MaxSock);
2.1 frystyk 544: FD_ZERO(FdArray+HTEvent_INDEX(HTEvent_READ));
545: FD_ZERO(FdArray+HTEvent_INDEX(HTEvent_WRITE));
546: FD_ZERO(FdArray+HTEvent_INDEX(HTEvent_OOB));
2.3 eric 547: #endif /* !WWW_WIN_ASYNC */
2.34 frystyk 548:
2.2 eric 549: EventOrder_deleteAll();
2.1 frystyk 550: return 0;
551: }
552:
553: /*
554: ** Dispatch the event to the appropriate event handler.
555: ** If no event handler is found then just return.
556: */
2.5 eric 557: PUBLIC int HTEventList_dispatch (SOCKET s, HTEventType type, ms_t now)
2.1 frystyk 558: {
2.3 eric 559: SockEvents * sockp = SockEvents_get(s, SockEvents_find);
560: if (sockp) {
561: HTEvent * event = sockp->events[HTEvent_INDEX(type)];
2.1 frystyk 562:
2.34 frystyk 563: /* Fixup the timeout */
2.5 eric 564: if (sockp->timeouts[HTEvent_INDEX(type)])
565: HTTimer_refresh(sockp->timeouts[HTEvent_INDEX(type)], now);
2.34 frystyk 566:
2.1 frystyk 567: /*
568: ** If we have found an event object for this event then see
569: ** is we should call it.
570: */
571: if (event && event->priority!=HT_PRIORITY_OFF)
572: return (*event->cbf) (s, event->param, type);
2.36 frystyk 573: HTTRACE(THD_TRACE, "Dispatch.... Handler %p NOT called\n" _ sockp);
2.1 frystyk 574: return HT_OK;
575: }
2.36 frystyk 576: HTTRACE(THD_TRACE, "Dispatch.... Bad socket %d\n" _ s);
2.1 frystyk 577: return NO;
578: }
579:
2.3 eric 580: PUBLIC HTEvent * HTEventList_lookup (SOCKET s, HTEventType type)
581: {
582: SockEvents * sockp = NULL;
583: if ((sockp = SockEvents_get(s, SockEvents_find)) == NULL)
584: return NULL;
585: return sockp->events[HTEvent_INDEX(type)];
586: }
587:
2.34 frystyk 588: /* ------------------------------------------------------------------------- */
589: /* THE EVENT LOOP */
590: /* ------------------------------------------------------------------------- */
591:
592: /*
593: ** Start eventloop
2.3 eric 594: */
2.34 frystyk 595: PUBLIC int HTEventList_newLoop (void)
2.3 eric 596: {
2.34 frystyk 597: return HTEventList_loop (NULL);
2.3 eric 598: }
599:
2.34 frystyk 600: /*
601: ** Stops the event loop. The function does not guarantee
602: ** that all requests have terminated. This is for the app to do
603: */
604: PUBLIC void HTEventList_stopLoop (void)
2.3 eric 605: {
2.34 frystyk 606: HTEndLoop = 1;
2.3 eric 607: }
608:
2.34 frystyk 609: /*
610: ** There are now two versions of the event loop. The first is if you want
611: ** to use async I/O on windows, and the other is if you want to use normal
612: ** Unix setup with sockets
2.3 eric 613: */
2.34 frystyk 614: PUBLIC int HTEventList_loop (HTRequest * theRequest)
2.3 eric 615: {
2.34 frystyk 616: #ifdef WWW_WIN_ASYNC
2.3 eric 617:
618: MSG msg;
2.25 frystyk 619: int status;
2.30 frystyk 620: while (!HTEndLoop && GetMessage(&msg,0,0,0)) {
2.3 eric 621: TranslateMessage(&msg);
622: DispatchMessage(&msg);
623: }
2.25 frystyk 624:
625: status = HTEndLoop;
626:
627: /* Reset HTEndLoop in case we want to start again */
628: HTEndLoop = 0;
629:
630: return (status == 1 ? HT_OK : HT_ERROR);
2.3 eric 631:
632: #else /* WWW_WIN_ASYNC */
633:
2.1 frystyk 634: fd_set treadset, twriteset, texceptset;
635: struct timeval waittime, * wt;
636: int active_sockets;
637: int maxfds;
2.5 eric 638: ms_t timeout;
639: ms_t now;
2.1 frystyk 640: SOCKET s;
2.5 eric 641: int status = HT_OK;
2.1 frystyk 642:
2.41 frystyk 643: /* Check that we don't have multiple loops started at once */
644: if (HTInLoop) {
645: HTTRACE(THD_TRACE, "Event Loop.. Already one loop running - exiting\n");
646: return HT_ERROR;
647: }
648: HTInLoop = YES;
649:
650: /* Set up list of events - is kept around until EventOrder_deleteAll */
651: if (!EventOrderList)
652: EventOrderList = HTList_new();
653: else
654: EventOrder_clearAll();
2.2 eric 655:
2.1 frystyk 656: /* Don't leave this loop until we leave the application */
2.27 frystyk 657: while (!HTEndLoop) {
2.1 frystyk 658:
659: /*
660: ** Timeval struct copy needed for linux, as it set the value to the
661: ** remaining timeout while exiting the select. (and perhaps for
662: ** other OS). Code borrowed from X server.
663: */
664: wt = NULL;
2.5 eric 665: if ((status = HTTimer_next(&timeout)))
2.40 frystyk 666: break;
2.5 eric 667: if (timeout != 0) {
2.1 frystyk 668: waittime.tv_sec = timeout / MILLI_PER_SECOND;
669: waittime.tv_usec = (timeout % MILLI_PER_SECOND) *
670: (1000000 / MILLI_PER_SECOND);
671: wt = &waittime;
672: }
673:
2.38 frystyk 674: /*
675: ** Now we copy the current active file descriptors to pass them to select.
676: */
677: treadset = FdArray[HTEvent_INDEX(HTEvent_READ)];
678: twriteset = FdArray[HTEvent_INDEX(HTEvent_WRITE)];
679: texceptset = FdArray[HTEvent_INDEX(HTEvent_OOB)];
680:
681: /* And also get the max socket value */
2.18 frystyk 682: maxfds = MaxSock;
683:
2.36 frystyk 684: HTTRACE(THD_TRACE, "Event Loop.. calling select: maxfds is %d\n" _ maxfds);
2.37 frystyk 685: #ifdef HTDEBUG
686: fd_dump(maxfds, &treadset, &twriteset, &texceptset, wt);
687: #endif
2.15 frystyk 688:
2.1 frystyk 689: #ifdef __hpux
690: active_sockets = select(maxfds+1, (int *)&treadset, (int *)&twriteset,
691: (int *)&texceptset, wt);
2.42 ! kahan 692: #elif defined(_WINSOCKAPI_)
! 693: /*
! 694: * yovavm@contact.com
! 695: *
! 696: * On some WINSOCK versions select() with 3 empty sets and NULL timeout
! 697: * returns 0 and in some it returns -1.
! 698: * If 0 is returned in such situation, we will go into an infinite loop
! 699: * (cause the sets will stay empty forever ...),
! 700: * so make sure to set the active_sockets = -1 which will take us out
! 701: * of the loop.
! 702: */
! 703: if ((treadset.fd_count || twriteset.fd_count || texceptset.fd_count)
! 704: && wt)
! 705: active_sockets = select(maxfds+1, &treadset, &twriteset,
! 706: &texceptset, wt);
! 707: else
! 708: active_sockets = -1;
2.1 frystyk 709: #else
710: active_sockets = select(maxfds+1, &treadset, &twriteset, &texceptset, wt);
711: #endif
2.2 eric 712:
2.5 eric 713: now = HTGetTimeInMillis();
2.18 frystyk 714:
2.36 frystyk 715: HTTRACE(THD_TRACE, "Event Loop.. select returns %d\n" _ active_sockets);
2.37 frystyk 716: #ifdef HTDEBUG
717: fd_dump(maxfds, &treadset, &twriteset, &texceptset, wt);
718: #endif
2.1 frystyk 719:
720: if (active_sockets == -1) {
2.20 frystyk 721: #ifdef EINTR
722: if (socerrno == EINTR) {
723: /*
724: ** EINTR The select() function was interrupted before any
725: ** of the selected events occurred and before the
726: ** timeout interval expired.
727: **
728: ** If SA_RESTART has been set for the interrupting
729: ** signal, it is implementation-dependent whether
730: ** select() restarts or returns with EINTR.
731: */
2.36 frystyk 732: HTTRACE(THD_TRACE, "Event Loop.. select was interruted - try again\n");
2.20 frystyk 733: continue;
734: }
735: #endif /* EINTR */
2.28 frystyk 736: #ifdef EBADF
737: if (socerrno == EBADF) {
738: /*
739: ** EBADF One or more of the file descriptor sets specified
740: ** a file descriptor that is not a valid open file
741: ** descriptor.
742: */
2.36 frystyk 743: HTTRACE(THD_TRACE, "Event Loop.. One or more sockets were not through their connect phase - try again\n");
2.28 frystyk 744: continue;
745: }
746: #endif
2.36 frystyk 747: HTTRACE(THD_TRACE, "Event Loop.. select returned error %d\n" _ socerrno);
748:
749: #ifdef HTDEBUG
2.3 eric 750: EventList_dump();
2.36 frystyk 751: #endif /* HTDEBUG */
752:
2.40 frystyk 753: status = HT_ERROR;
754: break;
2.1 frystyk 755: }
756:
757: /*
758: ** We had a timeout so now we check and see if we have a timeout
2.5 eric 759: ** handler to call. Let HTTimer_next get it.
2.1 frystyk 760: */
2.5 eric 761: if (active_sockets == 0)
2.1 frystyk 762: continue;
763:
2.34 frystyk 764: /* There were active sockets. Determine which fd sets they were in */
2.1 frystyk 765: for (s = 0 ; s <= maxfds ; s++) {
766: if (FD_ISSET(s, &texceptset))
2.34 frystyk 767: if ((status = EventOrder_add(s, HTEvent_OOB, now)) != HT_OK)
2.40 frystyk 768: goto stop_loop;
2.1 frystyk 769: if (FD_ISSET(s, &twriteset))
2.34 frystyk 770: if ((status = EventOrder_add(s, HTEvent_WRITE, now)) != HT_OK)
2.40 frystyk 771: goto stop_loop;
2.1 frystyk 772: if (FD_ISSET(s, &treadset))
2.34 frystyk 773: if ((status = EventOrder_add(s, HTEvent_READ, now)) != HT_OK)
2.40 frystyk 774: goto stop_loop;
2.1 frystyk 775: }
2.40 frystyk 776: if ((status = EventOrder_executeAndDelete()) != HT_OK) break;
2.27 frystyk 777: };
2.25 frystyk 778:
779: /* Reset HTEndLoop in case we want to start again */
2.40 frystyk 780: stop_loop:
2.25 frystyk 781: HTEndLoop = 0;
2.41 frystyk 782: HTInLoop = NO;
2.40 frystyk 783: return status;
2.34 frystyk 784: #endif /* !WWW_WIN_ASYNC */
785: }
786:
787: /* ------------------------------------------------------------------------- */
788: /* EVENT INITIALIZATION AND TERMINATION */
789: /* ------------------------------------------------------------------------- */
790:
791: #ifdef WWW_WIN_ASYNC
792:
793: /* Only responsible for WM_TIMER and WSA_AsyncSelect */
794: PRIVATE LRESULT CALLBACK AsyncWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
795: {
796: WORD event;
797: SOCKET sock;
798: HTEventType type;
799: ms_t now = HTGetTimeInMillis();
800:
801: /* timeout stuff */
802: if (uMsg == WM_TIMER) {
803: HTTimer_dispatch((HTTimer *)wParam);
804: return (0);
805: }
806:
807: if (uMsg != HTwinMsg) /* not our async message */
808: return (DefWindowProc(hwnd, uMsg, wParam, lParam));
809:
810: event = LOWORD(lParam);
811: sock = (SOCKET)wParam;
812: switch (event) {
813: case FD_READ: type = HTEvent_READ; break;
814: case FD_WRITE: type = HTEvent_WRITE; break;
815: case FD_ACCEPT: type = HTEvent_ACCEPT; break;
816: case FD_CONNECT: type = HTEvent_CONNECT; break;
817: case FD_OOB: type = HTEvent_OOB; break;
818: case FD_CLOSE: type = HTEvent_CLOSE; break;
2.36 frystyk 819: default: HTDEBUGBREAK("Unknown event %d\n" _ event);
2.34 frystyk 820: }
821: if (HTEventList_dispatch((int)sock, type, now) != HT_OK)
822: HTEndLoop = -1;
823: return (0);
824: }
2.1 frystyk 825:
2.34 frystyk 826: /* HTEventList_get/setWinHandle
827: ** --------------------------
828: ** Managing the windows handle on Windows
829: */
830: PUBLIC BOOL HTEventList_setWinHandle (HWND window, unsigned long message)
831: {
832: HTSocketWin = window;
833: HTwinMsg = message;
834: return YES;
2.1 frystyk 835: }
836:
2.34 frystyk 837: PUBLIC HWND HTEventList_getWinHandle (unsigned long * pMessage)
838: {
839: if (pMessage)
840: *pMessage = HTwinMsg;
841: return (HTSocketWin);
842: }
843: #endif /* WWW_WIN_ASYNC */
2.12 eric 844:
2.34 frystyk 845: PUBLIC BOOL HTEventInit (void)
2.12 eric 846: {
2.34 frystyk 847: #ifdef WWW_WIN_ASYNC
848: /*
849: ** We are here starting a hidden window to take care of events from
850: ** the async select() call in the async version of the event loop in
851: ** the Internal event manager (HTEvtLst.c)
852: */
853: static char className[] = "AsyncWindowClass";
854: WNDCLASS wc;
855: OSVERSIONINFO osInfo;
856:
857: wc.style=0;
858: wc.lpfnWndProc=(WNDPROC)AsyncWindowProc;
859: wc.cbClsExtra=0;
860: wc.cbWndExtra=0;
861: wc.hIcon=0;
862: wc.hCursor=0;
863: wc.hbrBackground=0;
864: wc.lpszMenuName=(LPSTR)0;
865: wc.lpszClassName=className;
866:
867: osInfo.dwOSVersionInfoSize = sizeof(osInfo);
868: GetVersionEx(&osInfo);
2.39 frystyk 869:
870: /* According to Gary Johnson, GetModuleHandle() works for NT as well */
871: #if 0
2.34 frystyk 872: if (osInfo.dwPlatformId == VER_PLATFORM_WIN32s || osInfo.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS)
873: wc.hInstance=GetModuleHandle(NULL); /* 95 and non threaded platforms */
874: else
2.39 frystyk 875: wc.hInstance=GetCurrentProcess(); /* NT and hopefully everything following */
876: #else
877: wc.hInstance=GetModuleHandle(NULL); /* Should work on all win32 stuff */
878: #endif
879:
2.34 frystyk 880: HTinstance = wc.hInstance;
881: HTclass = RegisterClass(&wc);
882: if (!HTclass) {
2.36 frystyk 883: HTTRACE(THD_TRACE, "HTLibInit.. Can't RegisterClass \"%s\"\n" _ className);
884: return NO;
2.34 frystyk 885: }
886: if (!(HTSocketWin = CreateWindow(className, "WWW_WIN_ASYNC", WS_POPUP, CW_USEDEFAULT, CW_USEDEFAULT,
887: CW_USEDEFAULT, CW_USEDEFAULT, 0, 0, wc.hInstance,0))) {
2.36 frystyk 888: #ifdef HTDEBUG
2.34 frystyk 889: char space[50];
2.36 frystyk 890: HTTRACE(THD_TRACE, "HTLibInit.. Can't Create Window \"WWW_WIN_ASYNC\" - error:");
2.34 frystyk 891: sprintf(space, "%ld\n", GetLastError());
2.36 frystyk 892: HTTRACE(THD_TRACE, space);
893: #endif /* HTDEBUG */
2.34 frystyk 894: return NO;
895: }
896: HTwinMsg = WM_USER; /* use first available message since app uses none */
897:
898: /* Register platform specific timer handlers for windows */
899: HTTimer_registerSetTimerCallback(Timer_setWindowsTimer);
900: HTTimer_registerDeleteTimerCallback(Timer_deleteWindowsTimer);
901:
902: #endif /* WWW_WIN_ASYNC */
903:
904: #ifdef _WINSOCKAPI_
905: /*
906: ** Initialise WinSock DLL. This must also be shut down! PMH
907: */
908: {
909: WSADATA wsadata;
910: if (WSAStartup(DESIRED_WINSOCK_VERSION, &wsadata)) {
2.36 frystyk 911: HTTRACE(THD_TRACE, "HTEventInit. Can't initialize WinSoc\n");
2.34 frystyk 912: WSACleanup();
913: return NO;
914: }
915: if (wsadata.wVersion < MINIMUM_WINSOCK_VERSION) {
2.36 frystyk 916: HTTRACE(THD_TRACE, "HTEventInit. Bad version of WinSoc\n");
2.34 frystyk 917: WSACleanup();
918: return NO;
919: }
2.36 frystyk 920: HTTRACE(APP_TRACE, "HTEventInit. Using WinSoc version \"%s\".\n" _
2.34 frystyk 921: wsadata.szDescription);
2.12 eric 922: }
2.34 frystyk 923: #endif /* _WINSOCKAPI_ */
924:
925: HTEvent_setRegisterCallback(HTEventList_register);
926: HTEvent_setUnregisterCallback(HTEventList_unregister);
927: return YES;
2.12 eric 928: }
929:
2.34 frystyk 930: PUBLIC BOOL HTEventTerminate (void)
931: {
932: #ifdef _WINSOCKAPI_
933: WSACleanup();
934: #endif /* _WINSOCKAPI_ */
935:
936: #ifdef WWW_WIN_ASYNC
937: DestroyWindow(HTSocketWin);
938: UnregisterClass((LPCTSTR)HTclass, HTinstance);
939: #endif /* WWW_WIN_ASYNC */
940:
941: return YES;
942: }
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