Annotation of libwww/Library/src/HTEvtLst.c, revision 2.6
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.
2.6 ! eric 6: ** @(#) $Id: HTEvtLst.c,v 2.5 1996/12/13 22:06:06 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:
2.3 eric 72: PRIVATE SockEvents * SockEvents_get (SOCKET s, SockEvents_action action)
2.1 frystyk 73: {
74: long v = HASH(s);
2.2 eric 75: HTList* cur;
2.3 eric 76: SockEvents * pres;
2.2 eric 77:
78: if (HashTable[v] == NULL)
79: HashTable[v] = HTList_new();
80: cur = HashTable[v];
2.3 eric 81: while ((pres = (SockEvents *) HTList_nextObject(cur)))
2.2 eric 82: if (pres->s == s)
83: return pres;
84:
2.3 eric 85: if (action == SockEvents_mayCreate) {
86: if ((pres = (SockEvents *) HT_CALLOC(1, sizeof(SockEvents))) == NULL)
2.1 frystyk 87: HT_OUTOFMEM("HTEventList_register");
2.2 eric 88: pres->s = s;
89: HTList_addObject(HashTable[v], (void *)pres);
90: return pres;
2.1 frystyk 91: }
92: return NULL;
93: }
94:
2.3 eric 95: PUBLIC void HTEvent_traceHead(void)
96: {
97: HTTrace(" event: pri millis callback param request ");
98: }
99: PUBLIC void HTEvent_trace(HTEvent * event)
100: {
101: if (event == NULL)
102: return;
103: HTTrace("%8p: %3d %6d %8p %8p %8p", event, event->priority, event->millis, event->cbf, event->param, event->request);
104: }
105: PUBLIC void HTTimer_traceHead(void)
106: {
107: HTTrace(" timer: millis expires ? param callback ");
108: }
109: PRIVATE char * MyTime(unsigned long int time, int len)
110: {
111: static char space[100];
112: sprintf(space, "1234567");
113: return space;
114: }
115: struct _HTTimer {
116: HTTimer * next; /* The next guy in line */
117: ms_t millis; /* Relative value in millis */
118: ms_t expires; /* Absolute value in millis */
119: BOOL relative;
120: void * param; /* Client supplied context */
121: HTTimerCallback * cbf;
122: };
123:
124: PUBLIC void HTTimer_trace(HTTimer * timer)
125: {
126: if (timer == NULL)
127: return;
128: HTTrace("%8p: %6d %7s %c %8p %8p", timer, timer->millis, MyTime(timer->expires, 7),
129: timer->relative == YES ? 'R' : 'A', timer->param, timer->cbf);
130: }
2.1 frystyk 131: /*
132: ** A simple debug function that dumps all the socket arrays
133: ** as trace messages
134: */
2.3 eric 135: PRIVATE void EventList_dump (void)
2.1 frystyk 136: {
2.3 eric 137: long v;
138: HTList* cur;
139: SockEvents * pres;
140:
141: if (HashTable[v] == NULL) {
142: HTTrace("Event....... No sockets registered\n");
143: return;
144: }
145: HTTrace("Event....... Dumping socket events\n");
146: HTTrace("soc ");
147: HTEvent_traceHead();
148: HTTrace(" ");
149: HTTimer_traceHead();
150: HTTrace("\n");
151: for (v = 0; v < PRIME_TABLE_SIZE; v++) {
152: cur = HashTable[v];
153: while ((pres = (SockEvents *) HTList_nextObject(cur))) {
154: int i;
155: HTTrace("%3d \n", pres->s);
156: for (i = 0; i < HTEvent_TYPES; i++)
157: if (pres->events[i]) {
158: static char * names[HTEvent_TYPES] = {"read", "writ", "xcpt"};
159: HTTrace("%s", names[i]);
160: HTEvent_trace(pres->events[i]);
161: HTTrace(" ");
2.5 eric 162: #ifndef IN_EVENT
2.3 eric 163: HTTimer_trace(pres->timeouts[i]);
164: HTTrace(" ");
2.5 eric 165: #endif
2.3 eric 166: }
167: HTTrace("\n");
168: }
169: }
2.1 frystyk 170: }
171:
172: /* ------------------------------------------------------------------------- */
2.5 eric 173: /* T I M E O U T H A N D L E R */
174: PRIVATE int EventListTimerHandler (HTTimer * timer, void * param, HTEventType type)
175: {
176: SockEvents * sockp = (SockEvents *)param;
177: HTEvent * event;
178: HTMemLog_flush();
179: #ifdef IN_EVENT
180: if (sockp->events[HTEvent_INDEX(HTEvent_READ)]->timer == timer)
181: #else /* IN_EVENT */
182: if (sockp->timeouts[HTEvent_INDEX(HTEvent_READ)] == timer)
183: #endif /* !IN_EVENT */
184: {
185: event = sockp->events[HTEvent_INDEX(HTEvent_READ)];
186: if (THD_TRACE) HTTrace("Event....... READ timed out on %d.\n", sockp->s);
187: return (*event->cbf) (sockp->s, event->param, HTEvent_TIMEOUT);
188: }
189: #ifdef IN_EVENT
190: if (sockp->events[HTEvent_INDEX(HTEvent_WRITE)]->timer == timer)
191: #else /* IN_EVENT */
192: if (sockp->timeouts[HTEvent_INDEX(HTEvent_WRITE)] == timer)
193: #endif /* !IN_EVENT */
194: {
195: event = sockp->events[HTEvent_INDEX(HTEvent_WRITE)];
196: if (THD_TRACE) HTTrace("Event....... WRITE timed out on %d.\n", sockp->s);
197: return (*event->cbf) (sockp->s, event->param, HTEvent_TIMEOUT);
198: }
199: #ifdef IN_EVENT
200: if (sockp->events[HTEvent_INDEX(HTEvent_OOB)]->timer == timer)
201: #else /* IN_EVENT */
202: if (sockp->timeouts[HTEvent_INDEX(HTEvent_OOB)] == timer)
203: #endif /* !IN_EVENT */
204: {
205: event = sockp->events[HTEvent_INDEX(HTEvent_OOB)];
206: if (THD_TRACE) HTTrace("Event....... OOB timed out on %d.\n", sockp->s);
207: return (*event->cbf) (sockp->s, event->param, HTEvent_TIMEOUT);
208: }
209: HTTrace("Event....... can't find event for timer %p.\n", timer);
210: return HT_ERROR;
211: }
212:
213: /* ------------------------------------------------------------------------- */
2.2 eric 214: /* E V E N T O R D E R I N G S T U F F */
215: #ifdef HT_EVENT_ORDER
216: typedef struct {
217: HTEvent * event;
218: SOCKET s;
219: HTEventType type;
220: HTPriority skipped;
221: } EventOrder;
2.1 frystyk 222:
2.2 eric 223: HTList * EventOrderList = NULL;
224: #if 0
225: /*
226: ** return -1 if a should be after b
227: */
228: int EventOrderComparer (const void * a, const void * b)
229: {
230: EventOrder * placeMe = (EventOrder *)a;
231: EventOrder * maybeHere = (EventOrder *)b;
232: if (placeMe->event->priority+placeMe->skipped >= maybeHere->event->priority+maybeHere->skipped)
233: return 1;
234: return -1;
235: }
236: #endif
237:
2.5 eric 238: int EventOrder_add (SOCKET s, HTEventType type, ms_t now)
2.2 eric 239: {
240: EventOrder * pres;
241: HTList * cur = EventOrderList;
242: HTList * insertAfter = cur;
2.5 eric 243: SockEvents * sockp = SockEvents_get(s, SockEvents_find);
244: HTEvent * event;
2.2 eric 245:
2.5 eric 246: if (sockp == NULL || (event = sockp->events[HTEvent_INDEX(type)]) == NULL) {
247: HTTrace("EventOrder.. no event found for socket %d, type %s.\n", s, HTEvent_type2str(type));
2.2 eric 248: return HT_ERROR;
249: }
250:
2.5 eric 251: /* Fixup the timeout
252: */
253: #ifdef IN_EVENT
254: if (event->timer)
255: HTTimer_refresh(event->timer, now);
256: #else
257: if (sockp->timeouts[HTEvent_INDEX(type)])
258: HTTimer_refresh(sockp->timeouts[HTEvent_INDEX(type)], now);
259: #endif
260:
2.2 eric 261: /*
262: ** Look to see if it's already here from before
263: */
264: while ((pres = (EventOrder *) HTList_nextObject(cur))) {
265: if (pres->s == s && pres->event == event && pres->type == type) {
266: pres->skipped++;
267: return HT_OK;
268: }
269: if (pres->event->priority+pres->skipped > event->priority)
270: insertAfter = cur;
271: }
272:
273: /*
274: ** No, so create a new element
275: */
276: if ((pres = (EventOrder *) HT_CALLOC(1, sizeof(EventOrder))) == NULL)
277: HT_OUTOFMEM("EventOrder_add");
278: pres->event = event;
279: pres->s = s;
280: pres->type = type;
281: HTList_addObject(insertAfter, (void *)pres);
282: return HT_OK;
283: }
284:
285: PUBLIC int EventOrder_executeAndDelete (void)
286: {
2.4 eric 287: HTList * cur = EventOrderList;
2.2 eric 288: EventOrder * pres;
289: int i = 0;
290: if (THD_TRACE) HTTrace("EventOrder.. execute ordered events\n");
2.4 eric 291: if (cur == NULL) return NO;
2.2 eric 292: while ((pres = (EventOrder *) HTList_removeLastObject(cur)) && i < EVENTS_TO_EXECUTE) {
2.5 eric 293: HTEvent * event = pres->event;
294: int ret;
295: HTTrace("EventList... calling socket %d, request %p handler %p type %s\n",
296: pres->s, (void *) event->request,
297: (void *) event->cbf, HTEvent_type2str(pres->type));
298: ret = (*pres->event->cbf)(pres->s, pres->event->param, pres->type);
2.2 eric 299: HT_FREE(pres);
300: if (ret != HT_OK)
301: return ret;
302: i++;
303: }
304: return HT_OK;
305: }
306:
307: PUBLIC BOOL EventOrder_deleteAll (void)
308: {
309: HTList * cur = EventOrderList;
310: EventOrder * pres;
311: if (THD_TRACE) HTTrace("EventOrder.. all ordered events\n");
2.4 eric 312: if (cur == NULL) return NO;
2.2 eric 313: while ((pres = (EventOrder *) HTList_nextObject(cur)))
314: HT_FREE(pres);
315: HTList_delete(EventOrderList);
316: EventOrderList = NULL;
317: return YES;
318: }
319: #endif /* HT_EVENT_ORDER */
320:
321: /* ------------------------------------------------------------------------- */
2.1 frystyk 322:
323: /*
324: ** For a given socket, reqister a request structure, a set of operations,
325: ** a HTEventCallback function, and a priority. For this implementation,
326: ** we allow only a single HTEventCallback function for all operations.
327: ** and the priority field is ignored.
328: */
329: PUBLIC int HTEventList_register (SOCKET s, HTEventType type, HTEvent * event)
330: {
2.3 eric 331: SockEvents * sockp;
2.1 frystyk 332: if (THD_TRACE)
2.5 eric 333: HTTrace("Event....... Register socket %d, request %p handler %p type %s at priority %d\n",
2.1 frystyk 334: s, (void *) event->request,
2.5 eric 335: (void *) event->cbf, HTEvent_type2str(type),
2.1 frystyk 336: (unsigned) event->priority);
2.4 eric 337: if (s==INVSOC || HTEvent_INDEX(type) >= HTEvent_TYPES)
2.1 frystyk 338: return 0;
339:
340: /*
341: ** Insert socket into appropriate file descriptor set. We also make sure
342: ** that it is registered in the global set.
343: */
2.5 eric 344: if (THD_TRACE) HTTrace("Event....... Registering socket for %s\n", HTEvent_type2str(type));
2.3 eric 345: sockp = SockEvents_get(s, SockEvents_mayCreate);
346: sockp->s = s;
347: sockp->events[HTEvent_INDEX(type)] = event;
348: #ifdef WWW_WIN_ASYNC
2.4 eric 349: if (WSAAsyncSelect(s, HTSocketWin, HTwinMsg, HTEvent_BITS(type)) < 0)
2.3 eric 350: return HT_ERROR;
351: #else /* WWW_WIN_ASYNC */
2.1 frystyk 352: FD_SET(s, FdArray+HTEvent_INDEX(type));
2.3 eric 353: if (s > MaxSock) MaxSock = s ;
354: #endif /* !WWW_WIN_ASYNC */
2.1 frystyk 355: /*
356: ** If the timeout has been set (relative in millis) then we register
357: ** a new timeout for this event
358: */
359: if (event->millis >= 0) {
2.5 eric 360: #ifdef IN_EVENT
361: event->timer = HTTimer_new(NULL, EventListTimerHandler, sockp, event->millis, YES);
362: #else
2.3 eric 363: sockp->timeouts[HTEvent_INDEX(type)] = HTTimer_new(NULL, EventListTimerHandler, sockp, event->millis, YES);
2.5 eric 364: #endif
2.1 frystyk 365: }
366:
367: return HT_OK;
368: }
369:
2.3 eric 370: PRIVATE int EventList_remaining(SockEvents * pres)
371: {
372: int ret = 0;
373: int i;
374: for (i = 0; i < HTEvent_TYPES; i++)
375: if (pres->events[i] != NULL)
376: ret |= 1<<i;
377: return ret;
378: }
379:
2.1 frystyk 380: /*
381: ** Remove the registered information for the specified socket for the actions
382: ** specified in ops. if no actions remain after the unregister, the registered
383: ** info is deleted, and, if the socket has been registered for notification,
384: ** the HTEventCallback will be invoked.
385: */
386: PUBLIC int HTEventList_unregister(SOCKET s, HTEventType type)
387: {
2.3 eric 388: long v = HASH(s);
389: HTList * cur = HashTable[v];
390: HTList * last = cur;
391: SockEvents * pres;
2.2 eric 392:
2.6 ! eric 393: MaxSock = -1; /* re-find maximum in-use socket */
2.3 eric 394: while ((pres = (SockEvents *) HTList_nextObject(cur))) {
2.2 eric 395: if (pres->s == s) {
2.3 eric 396: int remaining;
2.1 frystyk 397:
398: /*
399: ** Unregister the event from this action
400: */
2.2 eric 401: pres->events[HTEvent_INDEX(type)] = NULL;
2.1 frystyk 402:
403: /*
404: ** Check to see of there was a timeout connected with the event.
405: ** If so then delete the timeout as well.
406: */
407: {
2.5 eric 408: #ifdef IN_EVENT
409: HTTimer * timer = pres->events[HTEvent_INDEX(type)]->timer;
410: #else
2.2 eric 411: HTTimer * timer = pres->timeouts[HTEvent_INDEX(type)];
2.5 eric 412: #endif
2.1 frystyk 413: if (timer) HTTimer_delete(timer);
414: }
415:
416: /*
417: ** Check to see if we can delete the action completely. We do this
418: ** if there are no more events registered.
419: */
2.3 eric 420: if ((remaining = EventList_remaining(pres)) == 0) {
2.1 frystyk 421: if (THD_TRACE)
422: HTTrace("Event....... No more events registered for socket %d\n", s);
2.2 eric 423: HT_FREE(pres);
2.3 eric 424: HTList_quickRemoveElement(cur, last);
2.2 eric 425: } else
426: last = cur; /* to set next pointer when creating new */
2.3 eric 427: #ifdef WWW_WIN_ASYNC
428: if (WSAAsyncSelect(s, HTSocketWin, HTwinMsg, remaining) < 0)
429: return HT_ERROR;
430: #else /* WWW_WIN_ASYNC */
431: FD_CLR(s, FdArray+HTEvent_INDEX(type));
432: #endif /* !WWW_WIN_ASYNC */
433: if (THD_TRACE)
2.5 eric 434: HTTrace("Event....... Socket %d unregisterd for %s\n", s, HTEvent_type2str(type));
2.6 ! eric 435: /*
! 436: ** finish checking list for max socket
! 437: */
! 438: while ((pres = (SockEvents *) HTList_nextObject(cur)))
! 439: if(pres->s > MaxSock)
! 440: MaxSock = pres->s;
! 441: if (MaxSock <= 0)
! 442: HTTrace("Event....... MaxSock: %d.\n", MaxSock);
2.1 frystyk 443: return HT_OK;
2.6 ! eric 444: } else if(pres->s > MaxSock)
! 445: MaxSock = pres->s;
2.1 frystyk 446: }
447: if (THD_TRACE) HTTrace("Event....... Couldn't find socket %d.\n", s);
448: return HT_ERROR;
449: }
450:
451: /*
452: ** Unregister all sockets
453: ** N.B. we just remove them for our internal data structures: it is up to the
454: ** application to actually close the socket.
455: */
2.2 eric 456: PUBLIC int HTEventList_unregisterAll (void)
2.1 frystyk 457: {
458: int i;
459: if (THD_TRACE) HTTrace("Unregister.. all sockets\n");
460: for (i = 0 ; i < PRIME_TABLE_SIZE; i++) {
2.2 eric 461: HTList * cur = HashTable[i];
2.3 eric 462: SockEvents * pres;
463: while ((pres = (SockEvents *) HTList_nextObject(cur))) {
464: #ifdef WWW_WIN_ASYNC
465: WSAAsyncSelect(pres->s, HTSocketWin, HTwinMsg, 0);
466: #endif /* WWW_WIN_ASYNC */
2.2 eric 467: HT_FREE(pres);
2.3 eric 468: }
2.2 eric 469: HTList_delete(HashTable[i]);
470: HashTable[i] = NULL;
2.1 frystyk 471: }
2.3 eric 472: #ifndef WWW_WIN_ASYNC
473: MaxSock = 0 ;
2.1 frystyk 474: FD_ZERO(FdArray+HTEvent_INDEX(HTEvent_READ));
475: FD_ZERO(FdArray+HTEvent_INDEX(HTEvent_WRITE));
476: FD_ZERO(FdArray+HTEvent_INDEX(HTEvent_OOB));
2.3 eric 477: #endif /* !WWW_WIN_ASYNC */
2.2 eric 478: #ifdef HT_EVENT_ORDER
479: EventOrder_deleteAll();
480: #endif /* HT_EVENT_ORDER */
2.1 frystyk 481: return 0;
482: }
483:
484: /*
485: ** Dispatch the event to the appropriate event handler.
486: ** If no event handler is found then just return.
487: */
2.5 eric 488: PUBLIC int HTEventList_dispatch (SOCKET s, HTEventType type, ms_t now)
2.1 frystyk 489: {
2.3 eric 490: SockEvents * sockp = SockEvents_get(s, SockEvents_find);
491: if (sockp) {
492: HTEvent * event = sockp->events[HTEvent_INDEX(type)];
2.1 frystyk 493:
2.5 eric 494: /* Fixup the timeout
495: */
496: #ifdef IN_EVENT
497: if (event->timer)
498: HTTimer_refresh(event->timer, now);
499: #else
500: if (sockp->timeouts[HTEvent_INDEX(type)])
501: HTTimer_refresh(sockp->timeouts[HTEvent_INDEX(type)], now);
502: #endif
2.1 frystyk 503: /*
504: ** If we have found an event object for this event then see
505: ** is we should call it.
506: */
507: if (event && event->priority!=HT_PRIORITY_OFF)
508: return (*event->cbf) (s, event->param, type);
2.3 eric 509: if (THD_TRACE) HTTrace("Dispatch.... Handler %p NOT called\n", sockp);
2.1 frystyk 510: return HT_OK;
511: }
512: if (THD_TRACE) HTTrace("Dispatch.... Bad socket %d\n", s);
513: return NO;
514: }
515:
516: /*
517: ** Stops the (select based) event loop. The function does not guarantee
518: ** that all requests have terminated. This is for the app to do
519: */
520: PUBLIC void HTEventList_stopLoop (void)
521: {
522: HTEndLoop = 1;
523: }
524:
2.3 eric 525: PUBLIC HTEvent * HTEventList_lookup (SOCKET s, HTEventType type)
526: {
527: SockEvents * sockp = NULL;
528: if ((sockp = SockEvents_get(s, SockEvents_find)) == NULL)
529: return NULL;
530: return sockp->events[HTEvent_INDEX(type)];
531: }
532:
533: /* REGISTER DEFULT EVENT MANAGER
534: ** -----------------------------
535: ** Not done automaticly - may be done by application!
536: */
537: PUBLIC BOOL HTEventInit (void)
538: {
2.4 eric 539: #ifdef WWW_WIN_ASYNC
540: /*
541: ** We are here starting a hidden window to take care of events from
542: ** the async select() call in the async version of the event loop in
543: ** the Internal event manager (HTEvtLst.c)
544: */
545: static char className[] = "AsyncWindowClass";
546: WNDCLASS wc;
547: OSVERSIONINFO osInfo;
548:
549: wc.style=0;
550: wc.lpfnWndProc=(WNDPROC)AsyncWindowProc;
551: wc.cbClsExtra=0;
552: wc.cbWndExtra=0;
553: wc.hIcon=0;
554: wc.hCursor=0;
555: wc.hbrBackground=0;
556: wc.lpszMenuName=(LPSTR)0;
557: wc.lpszClassName=className;
558:
559: osInfo.dwOSVersionInfoSize = sizeof(osInfo);
560: GetVersionEx(&osInfo);
561: if (osInfo.dwPlatformId == VER_PLATFORM_WIN32s || osInfo.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS)
562: wc.hInstance=GetModuleHandle(NULL); /* 95 and non threaded platforms */
563: else
564: wc.hInstance=GetCurrentProcess(); /* NT and hopefully everything following */
565: if (!RegisterClass(&wc)) {
566: HTTrace("HTLibInit.. Can't RegisterClass \"%s\"\n", className);
567: return NO;
568: }
569: if (!(HTSocketWin = CreateWindow(className, "WWW_WIN_ASYNC", WS_POPUP, CW_USEDEFAULT, CW_USEDEFAULT,
570: CW_USEDEFAULT, CW_USEDEFAULT, 0, 0, wc.hInstance,0))) {
571: char space[50];
572: HTTrace("HTLibInit.. Can't CreateWindow \"WWW_WIN_ASYNC\" - error:");
573: sprintf(space, "%ld\n", GetLastError());
574: HTTrace(space);
575: return NO;
576: }
577: HTwinMsg = WM_USER; /* use first available message since app uses none */
578: #endif /* WWW_WIN_ASYNC */
579:
580: #ifdef _WINSOCKAPI_
581: /*
582: ** Initialise WinSock DLL. This must also be shut down! PMH
583: */
584: {
585: WSADATA wsadata;
586: if (WSAStartup(DESIRED_WINSOCK_VERSION, &wsadata)) {
587: if (WWWTRACE)
588: HTTrace("HTEventInit. Can't initialize WinSoc\n");
589: WSACleanup();
590: return NO;
591: }
592: if (wsadata.wVersion < MINIMUM_WINSOCK_VERSION) {
593: if (WWWTRACE)
594: HTTrace("HTEventInit. Bad version of WinSoc\n");
595: WSACleanup();
596: return NO;
597: }
598: if (APP_TRACE)
599: HTTrace("HTEventInit. Using WinSoc version \"%s\".\n",
600: wsadata.szDescription);
601: }
602: #endif /* _WINSOCKAPI_ */
603:
2.3 eric 604: HTEvent_setRegisterCallback(HTEventList_register);
605: HTEvent_setUnregisterCallback(HTEventList_unregister);
606: return YES;
607: }
608:
609: PUBLIC BOOL HTEventTerminate (void)
610: {
611: return YES;
612: }
613:
614: #ifdef WWW_WIN_ASYNC
615:
2.4 eric 616: /* HTEventList_get/setWinHandle
2.3 eric 617: ** --------------------------
618: ** Managing the windows handle on Windows
619: */
620: PUBLIC BOOL HTEventList_setWinHandle (HWND window, unsigned long message)
621: {
622: HTSocketWin = window;
623: HTwinMsg = message;
624: return YES;
625: }
626:
627: PUBLIC HWND HTEventList_getWinHandle (unsigned long * pMessage)
628: {
629: if (pMessage)
630: *pMessage = HTwinMsg;
631: return (HTSocketWin);
632: }
633:
634: /* only responsible for WM_TIMER and WSA_AsyncSelect */
635: PUBLIC LRESULT CALLBACK AsyncWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
636: {
637: WORD event;
638: SOCKET sock;
2.4 eric 639: HTEventType type;
2.5 eric 640: ms_t now = HTGetTimeInMillis();
2.3 eric 641:
642: /* timeout stuff */
643: if (uMsg == WM_TIMER) {
2.4 eric 644: HTTimer_dispatch((HTTimer *)wParam);
2.3 eric 645: return (0);
646: }
647:
648: if (uMsg != HTwinMsg) /* not our async message */
649: return (DefWindowProc(hwnd, uMsg, wParam, lParam));
650:
651: event = LOWORD(lParam);
652: sock = (SOCKET)wParam;
2.4 eric 653: switch (event) {
654: case FD_READ: type = HTEvent_READ; break;
655: case FD_WRITE: type = HTEvent_WRITE; break;
656: case FD_ACCEPT: type = HTEvent_ACCEPT; break;
657: case FD_CONNECT: type = HTEvent_CONNECT; break;
658: case FD_OOB: type = HTEvent_OOB; break;
659: case FD_CLOSE: type = HTEvent_CLOSE; break;
660: default: HTDebugBreak();
661: }
2.5 eric 662: if (HTEventList_dispatch((int)sock, type, now) != HT_OK)
2.4 eric 663: HTEndLoop = -1;
2.3 eric 664: return (0);
665: }
666:
2.4 eric 667: PUBLIC int HTEventList_loop (HTRequest * theRequest )
2.3 eric 668: {
669: MSG msg;
670: while (GetMessage(&msg,0,0,0)) {
671: TranslateMessage(&msg);
672: DispatchMessage(&msg);
673: }
674: return (HTEndLoop == 1 ? HT_OK : HT_ERROR);
675: }
676:
677: #else /* WWW_WIN_ASYNC */
678:
2.1 frystyk 679: /*
680: ** We wait for activity from one of our registered
681: ** channels, and dispatch on that.
682: **
683: ** There are now two versions of the event loop. The first is if you want
684: ** to use async I/O on windows, and the other is if you want to use normal
685: ** Unix setup with sockets
686: */
687: PUBLIC int HTEventList_loop (HTRequest * theRequest)
688: {
689: fd_set treadset, twriteset, texceptset;
690: struct timeval waittime, * wt;
691: int active_sockets;
692: int maxfds;
2.5 eric 693: ms_t timeout;
694: ms_t now;
2.1 frystyk 695: SOCKET s;
2.5 eric 696: int status = HT_OK;
2.1 frystyk 697: HTEndLoop = 0;
698:
2.2 eric 699: EventOrderList = HTList_new(); /* is kept around until EventOrder_deleteAll */
700:
2.1 frystyk 701: /* Don't leave this loop until we leave the application */
702: do {
703: treadset = FdArray[HTEvent_INDEX(HTEvent_READ)];
704: twriteset = FdArray[HTEvent_INDEX(HTEvent_WRITE)];
705: texceptset = FdArray[HTEvent_INDEX(HTEvent_OOB)];
2.3 eric 706: maxfds = MaxSock;
2.1 frystyk 707:
708: if (THD_TRACE) HTTrace("Event Loop.. calling select: maxfds is %d\n", maxfds);
709:
710: /*
711: ** Timeval struct copy needed for linux, as it set the value to the
712: ** remaining timeout while exiting the select. (and perhaps for
713: ** other OS). Code borrowed from X server.
714: */
715: wt = NULL;
2.5 eric 716: if ((status = HTTimer_next(&timeout)))
717: return status;
718: if (timeout != 0) {
2.1 frystyk 719: waittime.tv_sec = timeout / MILLI_PER_SECOND;
720: waittime.tv_usec = (timeout % MILLI_PER_SECOND) *
721: (1000000 / MILLI_PER_SECOND);
722: wt = &waittime;
723: }
724:
2.2 eric 725: HTTraceData((char*)&treadset, maxfds/8 + 1, "HTEventList_loop pre treadset: (maxfd:%d)", maxfds);
726: HTTraceData((char*)&twriteset, maxfds/8 + 1, "HTEventList_loop pre twriteset:");
727: HTTraceData((char*)&texceptset, maxfds/8 + 1, "HTEventList_loop pre texceptset:");
728:
2.1 frystyk 729: #ifdef __hpux
730: active_sockets = select(maxfds+1, (int *)&treadset, (int *)&twriteset,
731: (int *)&texceptset, wt);
732: #else
733: active_sockets = select(maxfds+1, &treadset, &twriteset, &texceptset, wt);
734: #endif
2.2 eric 735:
2.5 eric 736: now = HTGetTimeInMillis();
2.2 eric 737: HTTraceData((char*)&treadset, maxfds/8 + 1, "HTEventList_loop post treadset: (active_sockets:%d)", active_sockets);
738: HTTraceData((char*)&twriteset, maxfds/8 + 1, "HTEventList_loop post twriteset: (errno:%d)", errno);
739: HTTraceData((char*)&texceptset, maxfds/8 + 1, "HTEventList_loop post texceptset:");
740:
2.1 frystyk 741: if (THD_TRACE) HTTrace("Event Loop.. select returns %d\n", active_sockets);
742:
743: if (active_sockets == -1) {
744: HTRequest_addSystemError( theRequest, ERR_FATAL, socerrno, NO, "select");
2.3 eric 745: EventList_dump();
746: #if 0
2.1 frystyk 747: __DumpFDSet(FdArray+HTEvent_INDEX(HTEvent_READ), "Read");
748: __DumpFDSet(FdArray+HTEvent_INDEX(HTEvent_WRITE), "Write") ;
749: __DumpFDSet(FdArray+HTEvent_INDEX(HTEvent_OOB), "Exceptions");
2.3 eric 750: #endif /* 0 */
2.1 frystyk 751: return HT_ERROR;
752: }
753:
754: /*
755: ** We had a timeout so now we check and see if we have a timeout
2.5 eric 756: ** handler to call. Let HTTimer_next get it.
2.1 frystyk 757: */
2.5 eric 758: if (active_sockets == 0)
2.1 frystyk 759: continue;
760:
761: /*
762: ** There were active sockets. Determine which fd sets they were in
763: */
2.2 eric 764: #ifdef HT_EVENT_ORDER
2.5 eric 765: #define DISPATCH(socket, type, now) EventOrder_add(socket, type, now)
2.2 eric 766: #else /* HT_EVENT_ORDER */
2.5 eric 767: #define DISPATCH(socket, type, now) HTEventList_dispatch(socket, type, now)
2.2 eric 768: #endif /* !HT_EVENT_ORDER */
2.1 frystyk 769: for (s = 0 ; s <= maxfds ; s++) {
770: if (FD_ISSET(s, &texceptset))
2.5 eric 771: if ((status = DISPATCH(s, HTEvent_OOB, now)) != HT_OK)
2.1 frystyk 772: return status;
773: if (FD_ISSET(s, &twriteset))
2.5 eric 774: if ((status = DISPATCH(s, HTEvent_WRITE, now)) != HT_OK)
2.1 frystyk 775: return status;
776: if (FD_ISSET(s, &treadset))
2.5 eric 777: if ((status = DISPATCH(s, HTEvent_READ, now)) != HT_OK)
2.1 frystyk 778: return status;
779: }
2.2 eric 780: #ifdef HT_EVENT_ORDER
781: if ((status = EventOrder_executeAndDelete()) != HT_OK)
782: return status;
783: #endif /* HT_EVENT_ORDER */
2.1 frystyk 784: } while (!HTEndLoop);
785:
786: return HT_OK;
787: }
788:
2.3 eric 789: #endif /* !WWW_WIN_ASYNC */
Webmaster
![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to HTEvtLst.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Public] / libwww / Library / src