Annotation of libwww/Library/src/HTEvtLst.c, revision 2.43
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.
2.43 ! kahan 6: ** @(#) $Id: HTEvtLst.c,v 2.42 2000/06/07 10:14:27 kahan 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;
2.43 ! kahan 255:
! 256: /* if the socket doesn't exists, don't do anything */
! 257: if (s == INVSOC)
! 258: return NULL;
! 259:
2.34 frystyk 260: if (HashTable[v] == NULL) HashTable[v] = HTList_new();
261: cur = HashTable[v];
262: while ((pres = (SockEvents *) HTList_nextObject(cur)))
263: if (pres->s == s) return pres;
264:
265: if (action == SockEvents_mayCreate) {
266: if ((pres = (SockEvents *) HT_CALLOC(1, sizeof(SockEvents))) == NULL)
267: HT_OUTOFMEM("HTEventList_register");
268: pres->s = s;
269: HTList_addObject(HashTable[v], (void *)pres);
270: return pres;
271: }
272: return NULL;
2.2 eric 273: }
274:
2.34 frystyk 275: PRIVATE int EventOrder_add (SOCKET s, HTEventType type, ms_t now)
2.2 eric 276: {
277: EventOrder * pres;
278: HTList * cur = EventOrderList;
279: HTList * insertAfter = cur;
2.5 eric 280: SockEvents * sockp = SockEvents_get(s, SockEvents_find);
281: HTEvent * event;
2.2 eric 282:
2.5 eric 283: if (sockp == NULL || (event = sockp->events[HTEvent_INDEX(type)]) == NULL) {
2.36 frystyk 284: HTTRACE(THD_TRACE, "EventOrder.. no event found for socket %d, type %s.\n" _
285: s _ HTEvent_type2str(type));
2.2 eric 286: return HT_ERROR;
287: }
288:
2.34 frystyk 289: /* Fixup the timeout */
2.5 eric 290: if (sockp->timeouts[HTEvent_INDEX(type)])
291: HTTimer_refresh(sockp->timeouts[HTEvent_INDEX(type)], now);
292:
2.34 frystyk 293: /* Look to see if it's already here from before */
2.2 eric 294: while ((pres = (EventOrder *) HTList_nextObject(cur))) {
295: if (pres->s == s && pres->event == event && pres->type == type) {
296: pres->skipped++;
297: return HT_OK;
298: }
299: if (pres->event->priority+pres->skipped > event->priority)
300: insertAfter = cur;
301: }
302:
2.34 frystyk 303: /* Create a new element */
2.2 eric 304: if ((pres = (EventOrder *) HT_CALLOC(1, sizeof(EventOrder))) == NULL)
305: HT_OUTOFMEM("EventOrder_add");
306: pres->event = event;
307: pres->s = s;
308: pres->type = type;
309: HTList_addObject(insertAfter, (void *)pres);
310: return HT_OK;
311: }
312:
313: PUBLIC int EventOrder_executeAndDelete (void)
314: {
2.4 eric 315: HTList * cur = EventOrderList;
2.2 eric 316: EventOrder * pres;
317: int i = 0;
2.36 frystyk 318: HTTRACE(THD_TRACE, "EventOrder.. execute ordered events\n");
2.4 eric 319: if (cur == NULL) return NO;
2.34 frystyk 320: while ((pres=(EventOrder *) HTList_removeLastObject(cur)) && i<EVENTS_TO_EXECUTE) {
2.5 eric 321: HTEvent * event = pres->event;
322: int ret;
2.36 frystyk 323: HTTRACE(THD_TRACE, "EventList... calling socket %d, request %p handler %p type %s\n" _
324: pres->s _ (void *) event->request _
325: (void *) event->cbf _ HTEvent_type2str(pres->type));
2.5 eric 326: ret = (*pres->event->cbf)(pres->s, pres->event->param, pres->type);
2.2 eric 327: HT_FREE(pres);
2.34 frystyk 328: if (ret != HT_OK) return ret;
2.2 eric 329: i++;
330: }
331: return HT_OK;
332: }
333:
2.41 frystyk 334: PRIVATE BOOL EventOrder_clearAll (void)
2.2 eric 335: {
336: HTList * cur = EventOrderList;
337: EventOrder * pres;
2.41 frystyk 338: HTTRACE(THD_TRACE, "EventOrder.. Clearing all ordered events\n");
339: if (cur) {
340: while ((pres = (EventOrder *) HTList_nextObject(cur)))
341: HT_FREE(pres);
342: return YES;
343: }
344: return NO;
345: }
346:
347: PUBLIC BOOL EventOrder_deleteAll (void)
348: {
349: EventOrder_clearAll();
2.2 eric 350: HTList_delete(EventOrderList);
351: EventOrderList = NULL;
352: return YES;
353: }
354:
355: /* ------------------------------------------------------------------------- */
2.34 frystyk 356: /* EVENT REGISTRATION */
357: /* ------------------------------------------------------------------------- */
2.1 frystyk 358:
359: /*
2.15 frystyk 360: ** ResetMaxSock - reset the value of the maximum socket in use
361: */
2.17 frystyk 362: #ifndef WWW_WIN_ASYNC
2.15 frystyk 363: PRIVATE void __ResetMaxSock (void)
364: {
365: SOCKET cnt;
366: SOCKET t_max = 0;
367: SOCKET old_max = MaxSock;
368: for (cnt = 0 ; cnt <= MaxSock; cnt++) {
369: if (FD_ISSET(cnt, (FdArray + HTEvent_INDEX(HTEvent_READ))) ||
370: FD_ISSET(cnt, (FdArray + HTEvent_INDEX(HTEvent_WRITE))) ||
371: FD_ISSET(cnt, (FdArray + HTEvent_INDEX(HTEvent_OOB))))
372: if (cnt > t_max) t_max = cnt;
373: }
374: MaxSock = t_max+1;
2.36 frystyk 375: HTTRACE(THD_TRACE, "Event....... Reset MaxSock from %u to %u\n" _ old_max _ MaxSock);
2.15 frystyk 376: return;
377: }
2.17 frystyk 378: #endif /* !WWW_WIN_ASYNC */
2.15 frystyk 379:
2.34 frystyk 380: PRIVATE int EventList_remaining (SockEvents * pres)
2.19 frystyk 381: {
382: int ret = 0;
383: int i;
384: for (i = 0; i < HTEvent_TYPES; i++)
385: if (pres->events[i] != NULL)
386: ret |= 1<<i;
387: return ret;
388: }
389:
2.15 frystyk 390: /*
2.1 frystyk 391: ** For a given socket, reqister a request structure, a set of operations,
392: ** a HTEventCallback function, and a priority. For this implementation,
393: ** we allow only a single HTEventCallback function for all operations.
394: ** and the priority field is ignored.
395: */
396: PUBLIC int HTEventList_register (SOCKET s, HTEventType type, HTEvent * event)
397: {
2.19 frystyk 398: int newset = 0;
2.3 eric 399: SockEvents * sockp;
2.36 frystyk 400: HTTRACE(THD_TRACE, "Event....... Register socket %d, request %p handler %p type %s at priority %d\n" _
401: s _ (void *) event->request _
402: (void *) event->cbf _ HTEvent_type2str(type) _
2.1 frystyk 403: (unsigned) event->priority);
2.4 eric 404: if (s==INVSOC || HTEvent_INDEX(type) >= HTEvent_TYPES)
2.1 frystyk 405: return 0;
406:
407: /*
408: ** Insert socket into appropriate file descriptor set. We also make sure
409: ** that it is registered in the global set.
410: */
2.36 frystyk 411: HTTRACE(THD_TRACE, "Event....... Registering socket for %s\n" _ HTEvent_type2str(type));
2.3 eric 412: sockp = SockEvents_get(s, SockEvents_mayCreate);
413: sockp->s = s;
414: sockp->events[HTEvent_INDEX(type)] = event;
2.19 frystyk 415: newset = EventList_remaining(sockp);
2.3 eric 416: #ifdef WWW_WIN_ASYNC
2.19 frystyk 417: if (WSAAsyncSelect(s, HTSocketWin, HTwinMsg, HTEvent_BITS(newset)) < 0) {
2.36 frystyk 418: HTTRACE(THD_TRACE, "Event....... WSAAsyncSelect returned `%s'!" _ HTErrnoString(socerrno));
2.3 eric 419: return HT_ERROR;
2.19 frystyk 420: }
2.3 eric 421: #else /* WWW_WIN_ASYNC */
2.1 frystyk 422: FD_SET(s, FdArray+HTEvent_INDEX(type));
2.36 frystyk 423:
424: HTTRACEDATA((char *) FdArray+HTEvent_INDEX(type), 8, "HTEventList_register: (s:%d)" _ s);
425:
2.15 frystyk 426: if (s > MaxSock) {
427: MaxSock = s ;
2.36 frystyk 428: HTTRACE(THD_TRACE, "Event....... New value for MaxSock is %d\n" _ MaxSock);
2.15 frystyk 429: }
2.3 eric 430: #endif /* !WWW_WIN_ASYNC */
2.11 frystyk 431:
2.1 frystyk 432: /*
2.11 frystyk 433: ** If the timeout has been set (relative in millis) then we register
434: ** a new timeout for this event unless we already have a timer.
2.1 frystyk 435: */
436: if (event->millis >= 0) {
2.11 frystyk 437: sockp->timeouts[HTEvent_INDEX(type)] =
438: HTTimer_new(sockp->timeouts[HTEvent_INDEX(type)],
2.22 frystyk 439: EventListTimerHandler, sockp, event->millis, YES, YES);
2.1 frystyk 440: }
441:
442: return HT_OK;
443: }
444:
445: /*
446: ** Remove the registered information for the specified socket for the actions
447: ** specified in ops. if no actions remain after the unregister, the registered
448: ** info is deleted, and, if the socket has been registered for notification,
449: ** the HTEventCallback will be invoked.
450: */
2.34 frystyk 451: PUBLIC int HTEventList_unregister (SOCKET s, HTEventType type)
2.1 frystyk 452: {
2.3 eric 453: long v = HASH(s);
454: HTList * cur = HashTable[v];
455: HTList * last = cur;
456: SockEvents * pres;
2.9 eric 457: int ret = HT_ERROR;
2.43 ! kahan 458:
! 459: /* if the socket doesn't exists, don't do anything */
! 460: if (s == INVSOC)
! 461: return HT_OK;
2.2 eric 462:
2.9 eric 463: while (cur && (pres = (SockEvents *) HTList_nextObject(cur))) {
2.2 eric 464: if (pres->s == s) {
2.19 frystyk 465: int remaining = 0;
2.1 frystyk 466:
467: /*
468: ** Unregister the event from this action
469: */
2.2 eric 470: pres->events[HTEvent_INDEX(type)] = NULL;
2.19 frystyk 471: remaining = EventList_remaining(pres);
2.1 frystyk 472:
473: /*
474: ** Check to see of there was a timeout connected with the event.
475: ** If so then delete the timeout as well.
476: */
477: {
2.2 eric 478: HTTimer * timer = pres->timeouts[HTEvent_INDEX(type)];
2.19 frystyk 479: if (timer) HTTimer_delete(timer);
480: pres->timeouts[HTEvent_INDEX(type)] = NULL;
2.1 frystyk 481: }
482:
2.18 frystyk 483: #ifdef WWW_WIN_ASYNC
484: if (WSAAsyncSelect(s, HTSocketWin, HTwinMsg, remaining) < 0)
485: ret = HT_ERROR;
486: #else /* WWW_WIN_ASYNC */
487: FD_CLR(s, FdArray+HTEvent_INDEX(type));
2.36 frystyk 488:
489: HTTRACEDATA((char*)FdArray+HTEvent_INDEX(type), 8, "HTEventList_unregister: (s:%d)" _ s);
490:
2.18 frystyk 491: #endif /* !WWW_WIN_ASYNC */
492:
2.1 frystyk 493: /*
494: ** Check to see if we can delete the action completely. We do this
495: ** if there are no more events registered.
496: */
2.19 frystyk 497: if (remaining == 0) {
2.9 eric 498: HTList * doomed = cur;
2.36 frystyk 499: HTTRACE(THD_TRACE, "Event....... No more events registered for socket %d\n" _ s);
2.15 frystyk 500:
501: #ifndef WWW_WIN_ASYNC
502: /* Check to see if we have to update MaxSock */
2.34 frystyk 503: if (pres->s >= MaxSock) __ResetMaxSock();
2.15 frystyk 504: #endif /* !WWW_WIN_ASYNC */
505:
2.2 eric 506: HT_FREE(pres);
2.9 eric 507: pres = (SockEvents *) HTList_nextObject(cur);
508: HTList_quickRemoveElement(doomed, last);
509: }
510: ret = HT_OK;
2.15 frystyk 511:
2.36 frystyk 512: HTTRACE(THD_TRACE, "Event....... Socket %d unregistered for %s\n" _ s _
2.18 frystyk 513: HTEvent_type2str(type));
2.15 frystyk 514:
2.34 frystyk 515: /* We found the socket and can break */
2.15 frystyk 516: break;
2.9 eric 517: }
518: last = cur;
2.1 frystyk 519: }
2.34 frystyk 520: if (THD_TRACE) {
521: if (ret == HT_ERROR)
2.36 frystyk 522: HTTRACE(THD_TRACE, "Event....... Couldn't find socket %d. Can't unregister type %s\n" _
523: s _ HTEvent_type2str(type));
2.34 frystyk 524: }
2.9 eric 525: return ret;
2.1 frystyk 526: }
527:
528: /*
529: ** Unregister all sockets
530: ** N.B. we just remove them for our internal data structures: it is up to the
531: ** application to actually close the socket.
532: */
2.2 eric 533: PUBLIC int HTEventList_unregisterAll (void)
2.1 frystyk 534: {
535: int i;
2.36 frystyk 536: HTTRACE(THD_TRACE, "Unregister.. all sockets\n");
2.32 frystyk 537: for (i = 0 ; i < HT_M_HASH_SIZE; i++) {
2.2 eric 538: HTList * cur = HashTable[i];
2.3 eric 539: SockEvents * pres;
540: while ((pres = (SockEvents *) HTList_nextObject(cur))) {
541: #ifdef WWW_WIN_ASYNC
542: WSAAsyncSelect(pres->s, HTSocketWin, HTwinMsg, 0);
543: #endif /* WWW_WIN_ASYNC */
2.2 eric 544: HT_FREE(pres);
2.3 eric 545: }
2.2 eric 546: HTList_delete(HashTable[i]);
547: HashTable[i] = NULL;
2.1 frystyk 548: }
2.34 frystyk 549:
2.3 eric 550: #ifndef WWW_WIN_ASYNC
551: MaxSock = 0 ;
2.36 frystyk 552: HTTRACE(THD_TRACE, "Event....... New value for MaxSock is %d\n" _ MaxSock);
2.1 frystyk 553: FD_ZERO(FdArray+HTEvent_INDEX(HTEvent_READ));
554: FD_ZERO(FdArray+HTEvent_INDEX(HTEvent_WRITE));
555: FD_ZERO(FdArray+HTEvent_INDEX(HTEvent_OOB));
2.3 eric 556: #endif /* !WWW_WIN_ASYNC */
2.34 frystyk 557:
2.2 eric 558: EventOrder_deleteAll();
2.1 frystyk 559: return 0;
560: }
561:
562: /*
563: ** Dispatch the event to the appropriate event handler.
564: ** If no event handler is found then just return.
565: */
2.5 eric 566: PUBLIC int HTEventList_dispatch (SOCKET s, HTEventType type, ms_t now)
2.1 frystyk 567: {
2.3 eric 568: SockEvents * sockp = SockEvents_get(s, SockEvents_find);
569: if (sockp) {
570: HTEvent * event = sockp->events[HTEvent_INDEX(type)];
2.1 frystyk 571:
2.34 frystyk 572: /* Fixup the timeout */
2.5 eric 573: if (sockp->timeouts[HTEvent_INDEX(type)])
574: HTTimer_refresh(sockp->timeouts[HTEvent_INDEX(type)], now);
2.34 frystyk 575:
2.1 frystyk 576: /*
577: ** If we have found an event object for this event then see
578: ** is we should call it.
579: */
580: if (event && event->priority!=HT_PRIORITY_OFF)
581: return (*event->cbf) (s, event->param, type);
2.36 frystyk 582: HTTRACE(THD_TRACE, "Dispatch.... Handler %p NOT called\n" _ sockp);
2.1 frystyk 583: return HT_OK;
584: }
2.36 frystyk 585: HTTRACE(THD_TRACE, "Dispatch.... Bad socket %d\n" _ s);
2.1 frystyk 586: return NO;
587: }
588:
2.3 eric 589: PUBLIC HTEvent * HTEventList_lookup (SOCKET s, HTEventType type)
590: {
591: SockEvents * sockp = NULL;
592: if ((sockp = SockEvents_get(s, SockEvents_find)) == NULL)
593: return NULL;
594: return sockp->events[HTEvent_INDEX(type)];
595: }
596:
2.34 frystyk 597: /* ------------------------------------------------------------------------- */
598: /* THE EVENT LOOP */
599: /* ------------------------------------------------------------------------- */
600:
601: /*
602: ** Start eventloop
2.3 eric 603: */
2.34 frystyk 604: PUBLIC int HTEventList_newLoop (void)
2.3 eric 605: {
2.34 frystyk 606: return HTEventList_loop (NULL);
2.3 eric 607: }
608:
2.34 frystyk 609: /*
610: ** Stops the event loop. The function does not guarantee
611: ** that all requests have terminated. This is for the app to do
612: */
613: PUBLIC void HTEventList_stopLoop (void)
2.3 eric 614: {
2.34 frystyk 615: HTEndLoop = 1;
2.3 eric 616: }
617:
2.34 frystyk 618: /*
619: ** There are now two versions of the event loop. The first is if you want
620: ** to use async I/O on windows, and the other is if you want to use normal
621: ** Unix setup with sockets
2.3 eric 622: */
2.34 frystyk 623: PUBLIC int HTEventList_loop (HTRequest * theRequest)
2.3 eric 624: {
2.34 frystyk 625: #ifdef WWW_WIN_ASYNC
2.3 eric 626:
627: MSG msg;
2.25 frystyk 628: int status;
2.30 frystyk 629: while (!HTEndLoop && GetMessage(&msg,0,0,0)) {
2.3 eric 630: TranslateMessage(&msg);
631: DispatchMessage(&msg);
632: }
2.25 frystyk 633:
634: status = HTEndLoop;
635:
636: /* Reset HTEndLoop in case we want to start again */
637: HTEndLoop = 0;
638:
639: return (status == 1 ? HT_OK : HT_ERROR);
2.3 eric 640:
641: #else /* WWW_WIN_ASYNC */
642:
2.1 frystyk 643: fd_set treadset, twriteset, texceptset;
644: struct timeval waittime, * wt;
645: int active_sockets;
646: int maxfds;
2.5 eric 647: ms_t timeout;
648: ms_t now;
2.1 frystyk 649: SOCKET s;
2.5 eric 650: int status = HT_OK;
2.1 frystyk 651:
2.41 frystyk 652: /* Check that we don't have multiple loops started at once */
653: if (HTInLoop) {
654: HTTRACE(THD_TRACE, "Event Loop.. Already one loop running - exiting\n");
655: return HT_ERROR;
656: }
657: HTInLoop = YES;
658:
659: /* Set up list of events - is kept around until EventOrder_deleteAll */
660: if (!EventOrderList)
661: EventOrderList = HTList_new();
662: else
663: EventOrder_clearAll();
2.2 eric 664:
2.1 frystyk 665: /* Don't leave this loop until we leave the application */
2.27 frystyk 666: while (!HTEndLoop) {
2.1 frystyk 667:
668: /*
669: ** Timeval struct copy needed for linux, as it set the value to the
670: ** remaining timeout while exiting the select. (and perhaps for
671: ** other OS). Code borrowed from X server.
672: */
673: wt = NULL;
2.5 eric 674: if ((status = HTTimer_next(&timeout)))
2.40 frystyk 675: break;
2.5 eric 676: if (timeout != 0) {
2.1 frystyk 677: waittime.tv_sec = timeout / MILLI_PER_SECOND;
678: waittime.tv_usec = (timeout % MILLI_PER_SECOND) *
679: (1000000 / MILLI_PER_SECOND);
680: wt = &waittime;
681: }
682:
2.38 frystyk 683: /*
684: ** Now we copy the current active file descriptors to pass them to select.
685: */
686: treadset = FdArray[HTEvent_INDEX(HTEvent_READ)];
687: twriteset = FdArray[HTEvent_INDEX(HTEvent_WRITE)];
688: texceptset = FdArray[HTEvent_INDEX(HTEvent_OOB)];
689:
690: /* And also get the max socket value */
2.18 frystyk 691: maxfds = MaxSock;
692:
2.36 frystyk 693: HTTRACE(THD_TRACE, "Event Loop.. calling select: maxfds is %d\n" _ maxfds);
2.37 frystyk 694: #ifdef HTDEBUG
695: fd_dump(maxfds, &treadset, &twriteset, &texceptset, wt);
696: #endif
2.15 frystyk 697:
2.1 frystyk 698: #ifdef __hpux
699: active_sockets = select(maxfds+1, (int *)&treadset, (int *)&twriteset,
700: (int *)&texceptset, wt);
2.42 kahan 701: #elif defined(_WINSOCKAPI_)
702: /*
703: * yovavm@contact.com
704: *
705: * On some WINSOCK versions select() with 3 empty sets and NULL timeout
706: * returns 0 and in some it returns -1.
707: * If 0 is returned in such situation, we will go into an infinite loop
708: * (cause the sets will stay empty forever ...),
709: * so make sure to set the active_sockets = -1 which will take us out
710: * of the loop.
711: */
712: if ((treadset.fd_count || twriteset.fd_count || texceptset.fd_count)
713: && wt)
714: active_sockets = select(maxfds+1, &treadset, &twriteset,
715: &texceptset, wt);
716: else
717: active_sockets = -1;
2.1 frystyk 718: #else
719: active_sockets = select(maxfds+1, &treadset, &twriteset, &texceptset, wt);
720: #endif
2.2 eric 721:
2.5 eric 722: now = HTGetTimeInMillis();
2.18 frystyk 723:
2.36 frystyk 724: HTTRACE(THD_TRACE, "Event Loop.. select returns %d\n" _ active_sockets);
2.37 frystyk 725: #ifdef HTDEBUG
726: fd_dump(maxfds, &treadset, &twriteset, &texceptset, wt);
727: #endif
2.1 frystyk 728:
729: if (active_sockets == -1) {
2.20 frystyk 730: #ifdef EINTR
731: if (socerrno == EINTR) {
732: /*
733: ** EINTR The select() function was interrupted before any
734: ** of the selected events occurred and before the
735: ** timeout interval expired.
736: **
737: ** If SA_RESTART has been set for the interrupting
738: ** signal, it is implementation-dependent whether
739: ** select() restarts or returns with EINTR.
740: */
2.36 frystyk 741: HTTRACE(THD_TRACE, "Event Loop.. select was interruted - try again\n");
2.20 frystyk 742: continue;
743: }
744: #endif /* EINTR */
2.28 frystyk 745: #ifdef EBADF
746: if (socerrno == EBADF) {
747: /*
748: ** EBADF One or more of the file descriptor sets specified
749: ** a file descriptor that is not a valid open file
750: ** descriptor.
751: */
2.36 frystyk 752: HTTRACE(THD_TRACE, "Event Loop.. One or more sockets were not through their connect phase - try again\n");
2.28 frystyk 753: continue;
754: }
755: #endif
2.36 frystyk 756: HTTRACE(THD_TRACE, "Event Loop.. select returned error %d\n" _ socerrno);
757:
758: #ifdef HTDEBUG
2.3 eric 759: EventList_dump();
2.36 frystyk 760: #endif /* HTDEBUG */
761:
2.40 frystyk 762: status = HT_ERROR;
763: break;
2.1 frystyk 764: }
765:
766: /*
767: ** We had a timeout so now we check and see if we have a timeout
2.5 eric 768: ** handler to call. Let HTTimer_next get it.
2.1 frystyk 769: */
2.5 eric 770: if (active_sockets == 0)
2.1 frystyk 771: continue;
772:
2.34 frystyk 773: /* There were active sockets. Determine which fd sets they were in */
2.1 frystyk 774: for (s = 0 ; s <= maxfds ; s++) {
775: if (FD_ISSET(s, &texceptset))
2.34 frystyk 776: if ((status = EventOrder_add(s, HTEvent_OOB, now)) != HT_OK)
2.40 frystyk 777: goto stop_loop;
2.1 frystyk 778: if (FD_ISSET(s, &twriteset))
2.34 frystyk 779: if ((status = EventOrder_add(s, HTEvent_WRITE, now)) != HT_OK)
2.40 frystyk 780: goto stop_loop;
2.1 frystyk 781: if (FD_ISSET(s, &treadset))
2.34 frystyk 782: if ((status = EventOrder_add(s, HTEvent_READ, now)) != HT_OK)
2.40 frystyk 783: goto stop_loop;
2.1 frystyk 784: }
2.40 frystyk 785: if ((status = EventOrder_executeAndDelete()) != HT_OK) break;
2.27 frystyk 786: };
2.25 frystyk 787:
788: /* Reset HTEndLoop in case we want to start again */
2.40 frystyk 789: stop_loop:
2.25 frystyk 790: HTEndLoop = 0;
2.41 frystyk 791: HTInLoop = NO;
2.40 frystyk 792: return status;
2.34 frystyk 793: #endif /* !WWW_WIN_ASYNC */
794: }
795:
796: /* ------------------------------------------------------------------------- */
797: /* EVENT INITIALIZATION AND TERMINATION */
798: /* ------------------------------------------------------------------------- */
799:
800: #ifdef WWW_WIN_ASYNC
801:
802: /* Only responsible for WM_TIMER and WSA_AsyncSelect */
803: PRIVATE LRESULT CALLBACK AsyncWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
804: {
805: WORD event;
806: SOCKET sock;
807: HTEventType type;
808: ms_t now = HTGetTimeInMillis();
809:
810: /* timeout stuff */
811: if (uMsg == WM_TIMER) {
812: HTTimer_dispatch((HTTimer *)wParam);
813: return (0);
814: }
815:
816: if (uMsg != HTwinMsg) /* not our async message */
817: return (DefWindowProc(hwnd, uMsg, wParam, lParam));
818:
819: event = LOWORD(lParam);
820: sock = (SOCKET)wParam;
821: switch (event) {
822: case FD_READ: type = HTEvent_READ; break;
823: case FD_WRITE: type = HTEvent_WRITE; break;
824: case FD_ACCEPT: type = HTEvent_ACCEPT; break;
825: case FD_CONNECT: type = HTEvent_CONNECT; break;
826: case FD_OOB: type = HTEvent_OOB; break;
827: case FD_CLOSE: type = HTEvent_CLOSE; break;
2.36 frystyk 828: default: HTDEBUGBREAK("Unknown event %d\n" _ event);
2.34 frystyk 829: }
830: if (HTEventList_dispatch((int)sock, type, now) != HT_OK)
831: HTEndLoop = -1;
832: return (0);
833: }
2.1 frystyk 834:
2.34 frystyk 835: /* HTEventList_get/setWinHandle
836: ** --------------------------
837: ** Managing the windows handle on Windows
838: */
839: PUBLIC BOOL HTEventList_setWinHandle (HWND window, unsigned long message)
840: {
841: HTSocketWin = window;
842: HTwinMsg = message;
843: return YES;
2.1 frystyk 844: }
845:
2.34 frystyk 846: PUBLIC HWND HTEventList_getWinHandle (unsigned long * pMessage)
847: {
848: if (pMessage)
849: *pMessage = HTwinMsg;
850: return (HTSocketWin);
851: }
852: #endif /* WWW_WIN_ASYNC */
2.12 eric 853:
2.34 frystyk 854: PUBLIC BOOL HTEventInit (void)
2.12 eric 855: {
2.34 frystyk 856: #ifdef WWW_WIN_ASYNC
857: /*
858: ** We are here starting a hidden window to take care of events from
859: ** the async select() call in the async version of the event loop in
860: ** the Internal event manager (HTEvtLst.c)
861: */
862: static char className[] = "AsyncWindowClass";
863: WNDCLASS wc;
864: OSVERSIONINFO osInfo;
865:
866: wc.style=0;
867: wc.lpfnWndProc=(WNDPROC)AsyncWindowProc;
868: wc.cbClsExtra=0;
869: wc.cbWndExtra=0;
870: wc.hIcon=0;
871: wc.hCursor=0;
872: wc.hbrBackground=0;
873: wc.lpszMenuName=(LPSTR)0;
874: wc.lpszClassName=className;
875:
876: osInfo.dwOSVersionInfoSize = sizeof(osInfo);
877: GetVersionEx(&osInfo);
2.39 frystyk 878:
879: /* According to Gary Johnson, GetModuleHandle() works for NT as well */
880: #if 0
2.34 frystyk 881: if (osInfo.dwPlatformId == VER_PLATFORM_WIN32s || osInfo.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS)
882: wc.hInstance=GetModuleHandle(NULL); /* 95 and non threaded platforms */
883: else
2.39 frystyk 884: wc.hInstance=GetCurrentProcess(); /* NT and hopefully everything following */
885: #else
886: wc.hInstance=GetModuleHandle(NULL); /* Should work on all win32 stuff */
887: #endif
888:
2.34 frystyk 889: HTinstance = wc.hInstance;
890: HTclass = RegisterClass(&wc);
891: if (!HTclass) {
2.36 frystyk 892: HTTRACE(THD_TRACE, "HTLibInit.. Can't RegisterClass \"%s\"\n" _ className);
893: return NO;
2.34 frystyk 894: }
895: if (!(HTSocketWin = CreateWindow(className, "WWW_WIN_ASYNC", WS_POPUP, CW_USEDEFAULT, CW_USEDEFAULT,
896: CW_USEDEFAULT, CW_USEDEFAULT, 0, 0, wc.hInstance,0))) {
2.36 frystyk 897: #ifdef HTDEBUG
2.34 frystyk 898: char space[50];
2.36 frystyk 899: HTTRACE(THD_TRACE, "HTLibInit.. Can't Create Window \"WWW_WIN_ASYNC\" - error:");
2.34 frystyk 900: sprintf(space, "%ld\n", GetLastError());
2.36 frystyk 901: HTTRACE(THD_TRACE, space);
902: #endif /* HTDEBUG */
2.34 frystyk 903: return NO;
904: }
905: HTwinMsg = WM_USER; /* use first available message since app uses none */
906:
907: /* Register platform specific timer handlers for windows */
908: HTTimer_registerSetTimerCallback(Timer_setWindowsTimer);
909: HTTimer_registerDeleteTimerCallback(Timer_deleteWindowsTimer);
910:
911: #endif /* WWW_WIN_ASYNC */
912:
913: #ifdef _WINSOCKAPI_
914: /*
915: ** Initialise WinSock DLL. This must also be shut down! PMH
916: */
917: {
918: WSADATA wsadata;
919: if (WSAStartup(DESIRED_WINSOCK_VERSION, &wsadata)) {
2.36 frystyk 920: HTTRACE(THD_TRACE, "HTEventInit. Can't initialize WinSoc\n");
2.34 frystyk 921: WSACleanup();
922: return NO;
923: }
924: if (wsadata.wVersion < MINIMUM_WINSOCK_VERSION) {
2.36 frystyk 925: HTTRACE(THD_TRACE, "HTEventInit. Bad version of WinSoc\n");
2.34 frystyk 926: WSACleanup();
927: return NO;
928: }
2.36 frystyk 929: HTTRACE(APP_TRACE, "HTEventInit. Using WinSoc version \"%s\".\n" _
2.34 frystyk 930: wsadata.szDescription);
2.12 eric 931: }
2.34 frystyk 932: #endif /* _WINSOCKAPI_ */
933:
934: HTEvent_setRegisterCallback(HTEventList_register);
935: HTEvent_setUnregisterCallback(HTEventList_unregister);
936: return YES;
2.12 eric 937: }
938:
2.34 frystyk 939: PUBLIC BOOL HTEventTerminate (void)
940: {
941: #ifdef _WINSOCKAPI_
942: WSACleanup();
943: #endif /* _WINSOCKAPI_ */
944:
945: #ifdef WWW_WIN_ASYNC
946: DestroyWindow(HTSocketWin);
947: UnregisterClass((LPCTSTR)HTclass, HTinstance);
948: #endif /* WWW_WIN_ASYNC */
949:
950: return YES;
951: }
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