Annotation of libwww/Library/src/HTEvtLst.c, revision 2.10
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.
2.10 ! eric 6: ** @(#) $Id: HTEvtLst.c,v 2.9 1997/01/03 01:03:37 eric 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 */
30: #include "sysdep.h"
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 PRIME_TABLE_SIZE 67
40: #define MILLI_PER_SECOND 1000
41: #define HASH(s) ((s) % PRIME_TABLE_SIZE)
2.2 eric 42: #define HT_EVENT_ORDER /* use event ordering code */
43: #define EVENTS_TO_EXECUTE 5 /* how many to execute in one select loop */
2.1 frystyk 44:
2.3 eric 45: #ifdef WWW_WIN_ASYNC
46: #define TIMEOUT 1 /* WM_TIMER id */
47: PRIVATE HWND HTSocketWin;
48: PRIVATE unsigned long HTwinMsg;
49: #else /* WWW_WIN_ASYNC */
50: PRIVATE fd_set FdArray[HTEvent_TYPES];
51: PRIVATE SOCKET MaxSock = 0 ; /* max socket value in use */
52: #endif /* !WWW_WIN_ASYNC */
2.1 frystyk 53:
2.3 eric 54: typedef struct {
55: SOCKET s ; /* our socket */
56: HTEvent * events[HTEvent_TYPES]; /* event parameters for read, write, oob */
2.5 eric 57: #ifndef IN_EVENT
58: HTTimer * timeouts[HTEvent_TYPES];
59: #endif
2.3 eric 60: } SockEvents;
61:
62: typedef enum {
63: SockEvents_mayCreate,
64: SockEvents_find
65: } SockEvents_action;
2.1 frystyk 66:
2.2 eric 67: HTList * HashTable[PRIME_TABLE_SIZE];
2.1 frystyk 68: PRIVATE int HTEndLoop = 0; /* If !0 then exit event loop */
69:
70: /* ------------------------------------------------------------------------- */
71:
2.8 frystyk 72: #ifdef WWW_WIN_ASYNC
73: PRIVATE BOOL Timer_setWindowsTimer (HTTimer * timer)
74: {
75: HWND hwnd;
76: UINT id;
77: hwnd = HTEventList_getWinHandle(&id);
2.9 eric 78: return SetTimer(hwnd, (UINT)timer, (UINT)HTTimer_getTime(timer), NULL) != 0;
2.8 frystyk 79: }
80:
81: PRIVATE BOOL Timer_deleteWindowsTimer (HTTimer * timer)
82: {
83: HWND hwnd;
84: UINT id;
85: hwnd = HTEventList_getWinHandle(&id);
86: return KillTimer(hwnd, (UINT)timer) != 0;
87: }
88: #endif /* WWW_WIN_ASYNC */
89:
2.3 eric 90: PRIVATE SockEvents * SockEvents_get (SOCKET s, SockEvents_action action)
2.1 frystyk 91: {
92: long v = HASH(s);
2.2 eric 93: HTList* cur;
2.3 eric 94: SockEvents * pres;
2.2 eric 95:
96: if (HashTable[v] == NULL)
97: HashTable[v] = HTList_new();
98: cur = HashTable[v];
2.3 eric 99: while ((pres = (SockEvents *) HTList_nextObject(cur)))
2.2 eric 100: if (pres->s == s)
101: return pres;
102:
2.3 eric 103: if (action == SockEvents_mayCreate) {
104: if ((pres = (SockEvents *) HT_CALLOC(1, sizeof(SockEvents))) == NULL)
2.1 frystyk 105: HT_OUTOFMEM("HTEventList_register");
2.2 eric 106: pres->s = s;
107: HTList_addObject(HashTable[v], (void *)pres);
108: return pres;
2.1 frystyk 109: }
110: return NULL;
111: }
112:
2.3 eric 113: PUBLIC void HTEvent_traceHead(void)
114: {
115: HTTrace(" event: pri millis callback param request ");
116: }
117: PUBLIC void HTEvent_trace(HTEvent * event)
118: {
119: if (event == NULL)
120: return;
121: HTTrace("%8p: %3d %6d %8p %8p %8p", event, event->priority, event->millis, event->cbf, event->param, event->request);
122: }
123: PUBLIC void HTTimer_traceHead(void)
124: {
125: HTTrace(" timer: millis expires ? param callback ");
126: }
127: PRIVATE char * MyTime(unsigned long int time, int len)
128: {
129: static char space[100];
130: sprintf(space, "1234567");
131: return space;
132: }
133: struct _HTTimer {
134: HTTimer * next; /* The next guy in line */
135: ms_t millis; /* Relative value in millis */
136: ms_t expires; /* Absolute value in millis */
137: BOOL relative;
138: void * param; /* Client supplied context */
139: HTTimerCallback * cbf;
140: };
141:
142: PUBLIC void HTTimer_trace(HTTimer * timer)
143: {
144: if (timer == NULL)
145: return;
146: HTTrace("%8p: %6d %7s %c %8p %8p", timer, timer->millis, MyTime(timer->expires, 7),
147: timer->relative == YES ? 'R' : 'A', timer->param, timer->cbf);
148: }
2.1 frystyk 149: /*
150: ** A simple debug function that dumps all the socket arrays
151: ** as trace messages
152: */
2.3 eric 153: PRIVATE void EventList_dump (void)
2.1 frystyk 154: {
2.3 eric 155: long v;
156: HTList* cur;
157: SockEvents * pres;
158:
159: if (HashTable[v] == NULL) {
160: HTTrace("Event....... No sockets registered\n");
161: return;
162: }
163: HTTrace("Event....... Dumping socket events\n");
164: HTTrace("soc ");
165: HTEvent_traceHead();
166: HTTrace(" ");
167: HTTimer_traceHead();
168: HTTrace("\n");
169: for (v = 0; v < PRIME_TABLE_SIZE; v++) {
170: cur = HashTable[v];
171: while ((pres = (SockEvents *) HTList_nextObject(cur))) {
172: int i;
173: HTTrace("%3d \n", pres->s);
174: for (i = 0; i < HTEvent_TYPES; i++)
175: if (pres->events[i]) {
176: static char * names[HTEvent_TYPES] = {"read", "writ", "xcpt"};
177: HTTrace("%s", names[i]);
178: HTEvent_trace(pres->events[i]);
179: HTTrace(" ");
2.5 eric 180: #ifndef IN_EVENT
2.3 eric 181: HTTimer_trace(pres->timeouts[i]);
182: HTTrace(" ");
2.5 eric 183: #endif
2.3 eric 184: }
185: HTTrace("\n");
186: }
187: }
2.1 frystyk 188: }
189:
190: /* ------------------------------------------------------------------------- */
2.5 eric 191: /* T I M E O U T H A N D L E R */
192: PRIVATE int EventListTimerHandler (HTTimer * timer, void * param, HTEventType type)
193: {
194: SockEvents * sockp = (SockEvents *)param;
195: HTEvent * event;
2.9 eric 196: /* HTMemLog_flush(); keep around - very useful for debugging crashes - EGP */
2.5 eric 197: #ifdef IN_EVENT
198: if (sockp->events[HTEvent_INDEX(HTEvent_READ)]->timer == timer)
199: #else /* IN_EVENT */
200: if (sockp->timeouts[HTEvent_INDEX(HTEvent_READ)] == timer)
201: #endif /* !IN_EVENT */
202: {
203: event = sockp->events[HTEvent_INDEX(HTEvent_READ)];
204: if (THD_TRACE) HTTrace("Event....... READ timed out on %d.\n", sockp->s);
205: return (*event->cbf) (sockp->s, event->param, HTEvent_TIMEOUT);
206: }
207: #ifdef IN_EVENT
208: if (sockp->events[HTEvent_INDEX(HTEvent_WRITE)]->timer == timer)
209: #else /* IN_EVENT */
210: if (sockp->timeouts[HTEvent_INDEX(HTEvent_WRITE)] == timer)
211: #endif /* !IN_EVENT */
212: {
213: event = sockp->events[HTEvent_INDEX(HTEvent_WRITE)];
214: if (THD_TRACE) HTTrace("Event....... WRITE timed out on %d.\n", sockp->s);
215: return (*event->cbf) (sockp->s, event->param, HTEvent_TIMEOUT);
216: }
217: #ifdef IN_EVENT
218: if (sockp->events[HTEvent_INDEX(HTEvent_OOB)]->timer == timer)
219: #else /* IN_EVENT */
220: if (sockp->timeouts[HTEvent_INDEX(HTEvent_OOB)] == timer)
221: #endif /* !IN_EVENT */
222: {
223: event = sockp->events[HTEvent_INDEX(HTEvent_OOB)];
224: if (THD_TRACE) HTTrace("Event....... OOB timed out on %d.\n", sockp->s);
225: return (*event->cbf) (sockp->s, event->param, HTEvent_TIMEOUT);
226: }
227: HTTrace("Event....... can't find event for timer %p.\n", timer);
228: return HT_ERROR;
229: }
230:
231: /* ------------------------------------------------------------------------- */
2.2 eric 232: /* E V E N T O R D E R I N G S T U F F */
233: #ifdef HT_EVENT_ORDER
234: typedef struct {
235: HTEvent * event;
236: SOCKET s;
237: HTEventType type;
238: HTPriority skipped;
239: } EventOrder;
2.1 frystyk 240:
2.2 eric 241: HTList * EventOrderList = NULL;
242: #if 0
243: /*
244: ** return -1 if a should be after b
245: */
246: int EventOrderComparer (const void * a, const void * b)
247: {
248: EventOrder * placeMe = (EventOrder *)a;
249: EventOrder * maybeHere = (EventOrder *)b;
250: if (placeMe->event->priority+placeMe->skipped >= maybeHere->event->priority+maybeHere->skipped)
251: return 1;
252: return -1;
253: }
254: #endif
255:
2.5 eric 256: int EventOrder_add (SOCKET s, HTEventType type, ms_t now)
2.2 eric 257: {
258: EventOrder * pres;
259: HTList * cur = EventOrderList;
260: HTList * insertAfter = cur;
2.5 eric 261: SockEvents * sockp = SockEvents_get(s, SockEvents_find);
262: HTEvent * event;
2.2 eric 263:
2.5 eric 264: if (sockp == NULL || (event = sockp->events[HTEvent_INDEX(type)]) == NULL) {
265: HTTrace("EventOrder.. no event found for socket %d, type %s.\n", s, HTEvent_type2str(type));
2.2 eric 266: return HT_ERROR;
267: }
268:
2.5 eric 269: /* Fixup the timeout
270: */
271: #ifdef IN_EVENT
272: if (event->timer)
273: HTTimer_refresh(event->timer, now);
274: #else
275: if (sockp->timeouts[HTEvent_INDEX(type)])
276: HTTimer_refresh(sockp->timeouts[HTEvent_INDEX(type)], now);
277: #endif
278:
2.2 eric 279: /*
280: ** Look to see if it's already here from before
281: */
282: while ((pres = (EventOrder *) HTList_nextObject(cur))) {
283: if (pres->s == s && pres->event == event && pres->type == type) {
284: pres->skipped++;
285: return HT_OK;
286: }
287: if (pres->event->priority+pres->skipped > event->priority)
288: insertAfter = cur;
289: }
290:
291: /*
292: ** No, so create a new element
293: */
294: if ((pres = (EventOrder *) HT_CALLOC(1, sizeof(EventOrder))) == NULL)
295: HT_OUTOFMEM("EventOrder_add");
296: pres->event = event;
297: pres->s = s;
298: pres->type = type;
299: HTList_addObject(insertAfter, (void *)pres);
300: return HT_OK;
301: }
302:
303: PUBLIC int EventOrder_executeAndDelete (void)
304: {
2.4 eric 305: HTList * cur = EventOrderList;
2.2 eric 306: EventOrder * pres;
307: int i = 0;
308: if (THD_TRACE) HTTrace("EventOrder.. execute ordered events\n");
2.4 eric 309: if (cur == NULL) return NO;
2.2 eric 310: while ((pres = (EventOrder *) HTList_removeLastObject(cur)) && i < EVENTS_TO_EXECUTE) {
2.5 eric 311: HTEvent * event = pres->event;
312: int ret;
2.7 frystyk 313: if (THD_TRACE)
2.5 eric 314: HTTrace("EventList... calling socket %d, request %p handler %p type %s\n",
315: pres->s, (void *) event->request,
316: (void *) event->cbf, HTEvent_type2str(pres->type));
317: ret = (*pres->event->cbf)(pres->s, pres->event->param, pres->type);
2.2 eric 318: HT_FREE(pres);
319: if (ret != HT_OK)
320: return ret;
321: i++;
322: }
323: return HT_OK;
324: }
325:
326: PUBLIC BOOL EventOrder_deleteAll (void)
327: {
328: HTList * cur = EventOrderList;
329: EventOrder * pres;
330: if (THD_TRACE) HTTrace("EventOrder.. all ordered events\n");
2.4 eric 331: if (cur == NULL) return NO;
2.2 eric 332: while ((pres = (EventOrder *) HTList_nextObject(cur)))
333: HT_FREE(pres);
334: HTList_delete(EventOrderList);
335: EventOrderList = NULL;
336: return YES;
337: }
338: #endif /* HT_EVENT_ORDER */
339:
340: /* ------------------------------------------------------------------------- */
2.1 frystyk 341:
342: /*
343: ** For a given socket, reqister a request structure, a set of operations,
344: ** a HTEventCallback function, and a priority. For this implementation,
345: ** we allow only a single HTEventCallback function for all operations.
346: ** and the priority field is ignored.
347: */
348: PUBLIC int HTEventList_register (SOCKET s, HTEventType type, HTEvent * event)
349: {
2.3 eric 350: SockEvents * sockp;
2.1 frystyk 351: if (THD_TRACE)
2.5 eric 352: HTTrace("Event....... Register socket %d, request %p handler %p type %s at priority %d\n",
2.1 frystyk 353: s, (void *) event->request,
2.5 eric 354: (void *) event->cbf, HTEvent_type2str(type),
2.1 frystyk 355: (unsigned) event->priority);
2.4 eric 356: if (s==INVSOC || HTEvent_INDEX(type) >= HTEvent_TYPES)
2.1 frystyk 357: return 0;
358:
359: /*
360: ** Insert socket into appropriate file descriptor set. We also make sure
361: ** that it is registered in the global set.
362: */
2.5 eric 363: if (THD_TRACE) HTTrace("Event....... Registering socket for %s\n", HTEvent_type2str(type));
2.3 eric 364: sockp = SockEvents_get(s, SockEvents_mayCreate);
365: sockp->s = s;
366: sockp->events[HTEvent_INDEX(type)] = event;
367: #ifdef WWW_WIN_ASYNC
2.4 eric 368: if (WSAAsyncSelect(s, HTSocketWin, HTwinMsg, HTEvent_BITS(type)) < 0)
2.3 eric 369: return HT_ERROR;
370: #else /* WWW_WIN_ASYNC */
2.1 frystyk 371: FD_SET(s, FdArray+HTEvent_INDEX(type));
2.3 eric 372: if (s > MaxSock) MaxSock = s ;
373: #endif /* !WWW_WIN_ASYNC */
2.1 frystyk 374: /*
375: ** If the timeout has been set (relative in millis) then we register
376: ** a new timeout for this event
377: */
378: if (event->millis >= 0) {
2.5 eric 379: #ifdef IN_EVENT
380: event->timer = HTTimer_new(NULL, EventListTimerHandler, sockp, event->millis, YES);
381: #else
2.3 eric 382: sockp->timeouts[HTEvent_INDEX(type)] = HTTimer_new(NULL, EventListTimerHandler, sockp, event->millis, YES);
2.5 eric 383: #endif
2.1 frystyk 384: }
385:
386: return HT_OK;
387: }
388:
2.3 eric 389: PRIVATE int EventList_remaining(SockEvents * pres)
390: {
391: int ret = 0;
392: int i;
393: for (i = 0; i < HTEvent_TYPES; i++)
394: if (pres->events[i] != NULL)
395: ret |= 1<<i;
396: return ret;
397: }
398:
2.1 frystyk 399: /*
400: ** Remove the registered information for the specified socket for the actions
401: ** specified in ops. if no actions remain after the unregister, the registered
402: ** info is deleted, and, if the socket has been registered for notification,
403: ** the HTEventCallback will be invoked.
404: */
405: PUBLIC int HTEventList_unregister(SOCKET s, HTEventType type)
406: {
2.3 eric 407: long v = HASH(s);
408: HTList * cur = HashTable[v];
409: HTList * last = cur;
410: SockEvents * pres;
2.9 eric 411: int ret = HT_ERROR;
2.2 eric 412:
2.9 eric 413: #ifndef WWW_WIN_ASYNC
2.6 eric 414: MaxSock = -1; /* re-find maximum in-use socket */
2.9 eric 415: #endif /* !WWW_WIN_ASYNC */
416: while (cur && (pres = (SockEvents *) HTList_nextObject(cur))) {
2.2 eric 417: if (pres->s == s) {
2.3 eric 418: int remaining;
2.1 frystyk 419:
420: /*
421: ** Unregister the event from this action
422: */
2.2 eric 423: pres->events[HTEvent_INDEX(type)] = NULL;
2.1 frystyk 424:
425: /*
426: ** Check to see of there was a timeout connected with the event.
427: ** If so then delete the timeout as well.
428: */
429: {
2.5 eric 430: #ifdef IN_EVENT
431: HTTimer * timer = pres->events[HTEvent_INDEX(type)]->timer;
432: #else
2.2 eric 433: HTTimer * timer = pres->timeouts[HTEvent_INDEX(type)];
2.5 eric 434: #endif
2.1 frystyk 435: if (timer) HTTimer_delete(timer);
436: }
437:
438: /*
439: ** Check to see if we can delete the action completely. We do this
440: ** if there are no more events registered.
441: */
2.3 eric 442: if ((remaining = EventList_remaining(pres)) == 0) {
2.9 eric 443: HTList * doomed = cur;
2.1 frystyk 444: if (THD_TRACE)
445: HTTrace("Event....... No more events registered for socket %d\n", s);
2.2 eric 446: HT_FREE(pres);
2.9 eric 447: pres = (SockEvents *) HTList_nextObject(cur);
448: HTList_quickRemoveElement(doomed, last);
449: }
450: ret = HT_OK;
2.3 eric 451: #ifdef WWW_WIN_ASYNC
452: if (WSAAsyncSelect(s, HTSocketWin, HTwinMsg, remaining) < 0)
2.9 eric 453: ret = HT_ERROR;
454: cur = NULL; /* we don't have to finish list to look for MaxSock in WWW_WIN_ASYNC */
2.3 eric 455: #else /* WWW_WIN_ASYNC */
456: FD_CLR(s, FdArray+HTEvent_INDEX(type));
457: #endif /* !WWW_WIN_ASYNC */
458: if (THD_TRACE)
2.5 eric 459: HTTrace("Event....... Socket %d unregisterd for %s\n", s, HTEvent_type2str(type));
2.6 eric 460: /*
2.10 ! eric 461: ** stay in loop to finish checking list for max socket if not at end
2.6 eric 462: */
2.10 ! eric 463: if (!cur) break;
2.9 eric 464: }
465: last = cur;
466: #ifndef WWW_WIN_ASYNC
467: if(pres->s > MaxSock)
2.6 eric 468: MaxSock = pres->s;
2.9 eric 469: #endif /* !WWW_WIN_ASYNC */
2.1 frystyk 470: }
2.9 eric 471: if (ret == HT_ERROR && THD_TRACE) HTTrace("Event....... Couldn't find socket %d.\n", s);
472: #ifndef WWW_WIN_ASYNC
473: if (MaxSock <= 0 && THD_TRACE) HTTrace("Event....... MaxSock: %d.\n", MaxSock);
474: #endif /* !WWW_WIN_ASYNC */
475: return ret;
2.1 frystyk 476: }
477:
478: /*
479: ** Unregister all sockets
480: ** N.B. we just remove them for our internal data structures: it is up to the
481: ** application to actually close the socket.
482: */
2.2 eric 483: PUBLIC int HTEventList_unregisterAll (void)
2.1 frystyk 484: {
485: int i;
486: if (THD_TRACE) HTTrace("Unregister.. all sockets\n");
487: for (i = 0 ; i < PRIME_TABLE_SIZE; i++) {
2.2 eric 488: HTList * cur = HashTable[i];
2.3 eric 489: SockEvents * pres;
490: while ((pres = (SockEvents *) HTList_nextObject(cur))) {
491: #ifdef WWW_WIN_ASYNC
492: WSAAsyncSelect(pres->s, HTSocketWin, HTwinMsg, 0);
493: #endif /* WWW_WIN_ASYNC */
2.2 eric 494: HT_FREE(pres);
2.3 eric 495: }
2.2 eric 496: HTList_delete(HashTable[i]);
497: HashTable[i] = NULL;
2.1 frystyk 498: }
2.3 eric 499: #ifndef WWW_WIN_ASYNC
500: MaxSock = 0 ;
2.1 frystyk 501: FD_ZERO(FdArray+HTEvent_INDEX(HTEvent_READ));
502: FD_ZERO(FdArray+HTEvent_INDEX(HTEvent_WRITE));
503: FD_ZERO(FdArray+HTEvent_INDEX(HTEvent_OOB));
2.3 eric 504: #endif /* !WWW_WIN_ASYNC */
2.2 eric 505: #ifdef HT_EVENT_ORDER
506: EventOrder_deleteAll();
507: #endif /* HT_EVENT_ORDER */
2.1 frystyk 508: return 0;
509: }
510:
511: /*
512: ** Dispatch the event to the appropriate event handler.
513: ** If no event handler is found then just return.
514: */
2.5 eric 515: PUBLIC int HTEventList_dispatch (SOCKET s, HTEventType type, ms_t now)
2.1 frystyk 516: {
2.3 eric 517: SockEvents * sockp = SockEvents_get(s, SockEvents_find);
518: if (sockp) {
519: HTEvent * event = sockp->events[HTEvent_INDEX(type)];
2.1 frystyk 520:
2.5 eric 521: /* Fixup the timeout
522: */
523: #ifdef IN_EVENT
524: if (event->timer)
525: HTTimer_refresh(event->timer, now);
526: #else
527: if (sockp->timeouts[HTEvent_INDEX(type)])
528: HTTimer_refresh(sockp->timeouts[HTEvent_INDEX(type)], now);
529: #endif
2.1 frystyk 530: /*
531: ** If we have found an event object for this event then see
532: ** is we should call it.
533: */
534: if (event && event->priority!=HT_PRIORITY_OFF)
535: return (*event->cbf) (s, event->param, type);
2.3 eric 536: if (THD_TRACE) HTTrace("Dispatch.... Handler %p NOT called\n", sockp);
2.1 frystyk 537: return HT_OK;
538: }
539: if (THD_TRACE) HTTrace("Dispatch.... Bad socket %d\n", s);
540: return NO;
541: }
542:
543: /*
544: ** Stops the (select based) event loop. The function does not guarantee
545: ** that all requests have terminated. This is for the app to do
546: */
547: PUBLIC void HTEventList_stopLoop (void)
548: {
549: HTEndLoop = 1;
550: }
551:
2.3 eric 552: PUBLIC HTEvent * HTEventList_lookup (SOCKET s, HTEventType type)
553: {
554: SockEvents * sockp = NULL;
555: if ((sockp = SockEvents_get(s, SockEvents_find)) == NULL)
556: return NULL;
557: return sockp->events[HTEvent_INDEX(type)];
558: }
559:
560: /* REGISTER DEFULT EVENT MANAGER
561: ** -----------------------------
562: ** Not done automaticly - may be done by application!
563: */
564: PUBLIC BOOL HTEventInit (void)
565: {
2.4 eric 566: #ifdef WWW_WIN_ASYNC
567: /*
568: ** We are here starting a hidden window to take care of events from
569: ** the async select() call in the async version of the event loop in
570: ** the Internal event manager (HTEvtLst.c)
571: */
572: static char className[] = "AsyncWindowClass";
573: WNDCLASS wc;
574: OSVERSIONINFO osInfo;
575:
576: wc.style=0;
577: wc.lpfnWndProc=(WNDPROC)AsyncWindowProc;
578: wc.cbClsExtra=0;
579: wc.cbWndExtra=0;
580: wc.hIcon=0;
581: wc.hCursor=0;
582: wc.hbrBackground=0;
583: wc.lpszMenuName=(LPSTR)0;
584: wc.lpszClassName=className;
585:
586: osInfo.dwOSVersionInfoSize = sizeof(osInfo);
587: GetVersionEx(&osInfo);
588: if (osInfo.dwPlatformId == VER_PLATFORM_WIN32s || osInfo.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS)
589: wc.hInstance=GetModuleHandle(NULL); /* 95 and non threaded platforms */
590: else
591: wc.hInstance=GetCurrentProcess(); /* NT and hopefully everything following */
592: if (!RegisterClass(&wc)) {
593: HTTrace("HTLibInit.. Can't RegisterClass \"%s\"\n", className);
594: return NO;
595: }
596: if (!(HTSocketWin = CreateWindow(className, "WWW_WIN_ASYNC", WS_POPUP, CW_USEDEFAULT, CW_USEDEFAULT,
597: CW_USEDEFAULT, CW_USEDEFAULT, 0, 0, wc.hInstance,0))) {
598: char space[50];
599: HTTrace("HTLibInit.. Can't CreateWindow \"WWW_WIN_ASYNC\" - error:");
600: sprintf(space, "%ld\n", GetLastError());
601: HTTrace(space);
602: return NO;
603: }
604: HTwinMsg = WM_USER; /* use first available message since app uses none */
2.8 frystyk 605:
606: /*
607: ** Register platform specific timer handlers for windows
608: */
609: HTTimer_registerSetTimerCallback(Timer_setWindowsTimer);
610: HTTimer_registerDeleteTimerCallback(Timer_deleteWindowsTimer);
611:
2.4 eric 612: #endif /* WWW_WIN_ASYNC */
613:
614: #ifdef _WINSOCKAPI_
615: /*
616: ** Initialise WinSock DLL. This must also be shut down! PMH
617: */
618: {
619: WSADATA wsadata;
620: if (WSAStartup(DESIRED_WINSOCK_VERSION, &wsadata)) {
621: if (WWWTRACE)
622: HTTrace("HTEventInit. Can't initialize WinSoc\n");
623: WSACleanup();
624: return NO;
625: }
626: if (wsadata.wVersion < MINIMUM_WINSOCK_VERSION) {
627: if (WWWTRACE)
628: HTTrace("HTEventInit. Bad version of WinSoc\n");
629: WSACleanup();
630: return NO;
631: }
632: if (APP_TRACE)
633: HTTrace("HTEventInit. Using WinSoc version \"%s\".\n",
634: wsadata.szDescription);
635: }
636: #endif /* _WINSOCKAPI_ */
637:
2.3 eric 638: HTEvent_setRegisterCallback(HTEventList_register);
639: HTEvent_setUnregisterCallback(HTEventList_unregister);
640: return YES;
641: }
642:
643: PUBLIC BOOL HTEventTerminate (void)
644: {
645: return YES;
646: }
647:
648: #ifdef WWW_WIN_ASYNC
649:
2.4 eric 650: /* HTEventList_get/setWinHandle
2.3 eric 651: ** --------------------------
652: ** Managing the windows handle on Windows
653: */
654: PUBLIC BOOL HTEventList_setWinHandle (HWND window, unsigned long message)
655: {
656: HTSocketWin = window;
657: HTwinMsg = message;
658: return YES;
659: }
660:
661: PUBLIC HWND HTEventList_getWinHandle (unsigned long * pMessage)
662: {
663: if (pMessage)
664: *pMessage = HTwinMsg;
665: return (HTSocketWin);
666: }
667:
668: /* only responsible for WM_TIMER and WSA_AsyncSelect */
669: PUBLIC LRESULT CALLBACK AsyncWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
670: {
671: WORD event;
672: SOCKET sock;
2.4 eric 673: HTEventType type;
2.5 eric 674: ms_t now = HTGetTimeInMillis();
2.3 eric 675:
676: /* timeout stuff */
677: if (uMsg == WM_TIMER) {
2.4 eric 678: HTTimer_dispatch((HTTimer *)wParam);
2.3 eric 679: return (0);
680: }
681:
682: if (uMsg != HTwinMsg) /* not our async message */
683: return (DefWindowProc(hwnd, uMsg, wParam, lParam));
684:
685: event = LOWORD(lParam);
686: sock = (SOCKET)wParam;
2.4 eric 687: switch (event) {
688: case FD_READ: type = HTEvent_READ; break;
689: case FD_WRITE: type = HTEvent_WRITE; break;
690: case FD_ACCEPT: type = HTEvent_ACCEPT; break;
691: case FD_CONNECT: type = HTEvent_CONNECT; break;
692: case FD_OOB: type = HTEvent_OOB; break;
693: case FD_CLOSE: type = HTEvent_CLOSE; break;
694: default: HTDebugBreak();
695: }
2.5 eric 696: if (HTEventList_dispatch((int)sock, type, now) != HT_OK)
2.4 eric 697: HTEndLoop = -1;
2.3 eric 698: return (0);
699: }
700:
2.4 eric 701: PUBLIC int HTEventList_loop (HTRequest * theRequest )
2.3 eric 702: {
703: MSG msg;
704: while (GetMessage(&msg,0,0,0)) {
705: TranslateMessage(&msg);
706: DispatchMessage(&msg);
707: }
708: return (HTEndLoop == 1 ? HT_OK : HT_ERROR);
709: }
710:
711: #else /* WWW_WIN_ASYNC */
712:
2.1 frystyk 713: /*
714: ** We wait for activity from one of our registered
715: ** channels, and dispatch on that.
716: **
717: ** There are now two versions of the event loop. The first is if you want
718: ** to use async I/O on windows, and the other is if you want to use normal
719: ** Unix setup with sockets
720: */
721: PUBLIC int HTEventList_loop (HTRequest * theRequest)
722: {
723: fd_set treadset, twriteset, texceptset;
724: struct timeval waittime, * wt;
725: int active_sockets;
726: int maxfds;
2.5 eric 727: ms_t timeout;
728: ms_t now;
2.1 frystyk 729: SOCKET s;
2.5 eric 730: int status = HT_OK;
2.1 frystyk 731: HTEndLoop = 0;
732:
2.2 eric 733: EventOrderList = HTList_new(); /* is kept around until EventOrder_deleteAll */
734:
2.1 frystyk 735: /* Don't leave this loop until we leave the application */
736: do {
737: treadset = FdArray[HTEvent_INDEX(HTEvent_READ)];
738: twriteset = FdArray[HTEvent_INDEX(HTEvent_WRITE)];
739: texceptset = FdArray[HTEvent_INDEX(HTEvent_OOB)];
2.3 eric 740: maxfds = MaxSock;
2.1 frystyk 741:
742: if (THD_TRACE) HTTrace("Event Loop.. calling select: maxfds is %d\n", maxfds);
743:
744: /*
745: ** Timeval struct copy needed for linux, as it set the value to the
746: ** remaining timeout while exiting the select. (and perhaps for
747: ** other OS). Code borrowed from X server.
748: */
749: wt = NULL;
2.5 eric 750: if ((status = HTTimer_next(&timeout)))
751: return status;
752: if (timeout != 0) {
2.1 frystyk 753: waittime.tv_sec = timeout / MILLI_PER_SECOND;
754: waittime.tv_usec = (timeout % MILLI_PER_SECOND) *
755: (1000000 / MILLI_PER_SECOND);
756: wt = &waittime;
757: }
758:
2.2 eric 759: HTTraceData((char*)&treadset, maxfds/8 + 1, "HTEventList_loop pre treadset: (maxfd:%d)", maxfds);
760: HTTraceData((char*)&twriteset, maxfds/8 + 1, "HTEventList_loop pre twriteset:");
761: HTTraceData((char*)&texceptset, maxfds/8 + 1, "HTEventList_loop pre texceptset:");
762:
2.1 frystyk 763: #ifdef __hpux
764: active_sockets = select(maxfds+1, (int *)&treadset, (int *)&twriteset,
765: (int *)&texceptset, wt);
766: #else
767: active_sockets = select(maxfds+1, &treadset, &twriteset, &texceptset, wt);
768: #endif
2.2 eric 769:
2.5 eric 770: now = HTGetTimeInMillis();
2.2 eric 771: HTTraceData((char*)&treadset, maxfds/8 + 1, "HTEventList_loop post treadset: (active_sockets:%d)", active_sockets);
772: HTTraceData((char*)&twriteset, maxfds/8 + 1, "HTEventList_loop post twriteset: (errno:%d)", errno);
773: HTTraceData((char*)&texceptset, maxfds/8 + 1, "HTEventList_loop post texceptset:");
774:
2.1 frystyk 775: if (THD_TRACE) HTTrace("Event Loop.. select returns %d\n", active_sockets);
776:
777: if (active_sockets == -1) {
778: HTRequest_addSystemError( theRequest, ERR_FATAL, socerrno, NO, "select");
2.3 eric 779: EventList_dump();
780: #if 0
2.1 frystyk 781: __DumpFDSet(FdArray+HTEvent_INDEX(HTEvent_READ), "Read");
782: __DumpFDSet(FdArray+HTEvent_INDEX(HTEvent_WRITE), "Write") ;
783: __DumpFDSet(FdArray+HTEvent_INDEX(HTEvent_OOB), "Exceptions");
2.3 eric 784: #endif /* 0 */
2.1 frystyk 785: return HT_ERROR;
786: }
787:
788: /*
789: ** We had a timeout so now we check and see if we have a timeout
2.5 eric 790: ** handler to call. Let HTTimer_next get it.
2.1 frystyk 791: */
2.5 eric 792: if (active_sockets == 0)
2.1 frystyk 793: continue;
794:
795: /*
796: ** There were active sockets. Determine which fd sets they were in
797: */
2.2 eric 798: #ifdef HT_EVENT_ORDER
2.5 eric 799: #define DISPATCH(socket, type, now) EventOrder_add(socket, type, now)
2.2 eric 800: #else /* HT_EVENT_ORDER */
2.5 eric 801: #define DISPATCH(socket, type, now) HTEventList_dispatch(socket, type, now)
2.2 eric 802: #endif /* !HT_EVENT_ORDER */
2.1 frystyk 803: for (s = 0 ; s <= maxfds ; s++) {
804: if (FD_ISSET(s, &texceptset))
2.5 eric 805: if ((status = DISPATCH(s, HTEvent_OOB, now)) != HT_OK)
2.1 frystyk 806: return status;
807: if (FD_ISSET(s, &twriteset))
2.5 eric 808: if ((status = DISPATCH(s, HTEvent_WRITE, now)) != HT_OK)
2.1 frystyk 809: return status;
810: if (FD_ISSET(s, &treadset))
2.5 eric 811: if ((status = DISPATCH(s, HTEvent_READ, now)) != HT_OK)
2.1 frystyk 812: return status;
813: }
2.2 eric 814: #ifdef HT_EVENT_ORDER
815: if ((status = EventOrder_executeAndDelete()) != HT_OK)
816: return status;
817: #endif /* HT_EVENT_ORDER */
2.1 frystyk 818: } while (!HTEndLoop);
819:
820: return HT_OK;
821: }
822:
2.3 eric 823: #endif /* !WWW_WIN_ASYNC */
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