2 #include <sys/select.h>
10 typedef struct Slave Slave;
11 typedef struct Ebuf Ebuf;
12 extern Mouse _drawmouse;
17 Ebuf *head; /* queue of messages for this descriptor */
19 int (*fn)(int, Event*, uchar*, int);
29 int n; /* number of bytes in buf */
37 static Slave eslave[MAXSLAVE];
38 static int Skeyboard = -1;
39 static int Smouse = -1;
40 static int Stimer = -1;
43 static int newkey(ulong);
44 static int extract(int canblock);
55 s->head = s->head->next;
64 return eread(~0UL, e);
68 eread(ulong keys, Event *e)
76 for(i=0; i<nslave; i++)
77 if((keys & (1<<i)) && eslave[i].head){
81 else if(i == Skeyboard)
86 eb = ebread(&eslave[i]);
89 id = (*eslave[i].fn)(id, e, eb->u.buf, eb->n);
91 memmove(e->data, eb->u.buf, eb->n);
105 drawerror(display, "events: mouse not initialized");
106 return ecanread(Emouse);
113 drawerror(display, "events: keyboard not initialzed");
114 return ecanread(Ekeyboard);
123 for(i=0; i<nslave; i++)
124 if((keys & (1<<i)) && eslave[i].head)
133 estartfn(ulong key, int fd, int n, int (*fn)(int, Event*, uchar*, int))
138 drawerror(display, "events: bad file descriptor");
139 if(n <= 0 || n > EMAXMSG)
149 estart(ulong key, int fd, int n)
151 return estartfn(key, fd, n, nil);
155 etimer(ulong key, int n)
158 drawerror(display, "events: timer started twice");
159 Stimer = newkey(key);
162 eslave[Stimer].n = n;
163 eslave[Stimer].nexttick = nsec()+n*1000000LL;
171 for(Skeyboard=0; Ekeyboard & ~(1<<Skeyboard); Skeyboard++)
173 eslave[Skeyboard].inuse = 1;
174 if(nslave <= Skeyboard)
175 nslave = Skeyboard+1;
178 for(Smouse=0; Emouse & ~(1<<Smouse); Smouse++)
180 eslave[Smouse].inuse = 1;
187 newebuf(Slave *s, int n)
191 eb = malloc(sizeof(*eb) - sizeof(eb->u.buf) + n);
193 drawerror(display, "events: out of memory");
197 s->tail = s->tail->next = eb;
199 s->head = s->tail = eb;
210 convW2M(&w, buf, sizeof buf);
211 return muxrpcstart(display->mux, buf);
215 finishrpc(Muxrpc *r, Wsysmsg *w)
221 if(!muxrpccanfinish(r, &v))
224 if(p == nil) /* eof on connection */
233 extract(int canblock)
237 fd_set rset, wset, xset;
238 struct timeval tv, *timeout;
243 * Flush draw buffer before waiting for responses.
244 * Avoid doing so if buffer is empty.
245 * Also make sure that we don't interfere with app-specific locking.
247 if(display->locking){
249 * if locking is being done by program,
250 * this means it can't depend on automatic
251 * flush in emouse() etc.
253 if(canqlock(&display->qlock)){
254 if(display->bufp > display->buf)
255 flushimage(display, 1);
256 unlockdisplay(display);
259 if(display->bufp > display->buf)
260 flushimage(display, 1);
270 for(i=0; i<nslave; i++){
274 if(eslave[i].rpc == nil)
275 eslave[i].rpc = startrpc(Trdmouse);
277 /* if ready, don't block in select */
280 FD_SET(display->srvfd, &rset);
281 FD_SET(display->srvfd, &xset);
282 if(display->srvfd > max)
283 max = display->srvfd;
285 }else if(i == Skeyboard){
286 if(eslave[i].rpc == nil)
287 eslave[i].rpc = startrpc(Trdkbd);
289 /* if ready, don't block in select */
292 FD_SET(display->srvfd, &rset);
293 FD_SET(display->srvfd, &xset);
294 if(display->srvfd > max)
295 max = display->srvfd;
297 }else if(i == Stimer){
299 if(t0 >= eslave[i].nexttick){
303 tv.tv_sec = (eslave[i].nexttick-t0)/1000000000;
304 tv.tv_usec = (eslave[i].nexttick-t0)%1000000000 / 1000;
308 FD_SET(eslave[i].fd, &rset);
309 FD_SET(eslave[i].fd, &xset);
310 if(eslave[i].fd > max)
321 if(select(max+1, &rset, &wset, &xset, timeout) < 0)
322 drawerror(display, "select failure");
325 * Look to see what can proceed.
328 for(i=0; i<nslave; i++){
332 if(finishrpc(eslave[i].rpc, &w)){
334 eb = newebuf(&eslave[i], sizeof(Mouse));
335 _drawmouse = w.mouse;
336 eb->u.mouse = w.mouse;
341 }else if(i == Skeyboard){
342 if(finishrpc(eslave[i].rpc, &w)){
344 eb = newebuf(&eslave[i], sizeof(Rune)+2); /* +8: alignment */
348 }else if(i == Stimer){
350 while(t0 > eslave[i].nexttick){
351 eslave[i].nexttick += eslave[i].n*1000000LL;
352 eslave[i].head = (Ebuf*)1;
356 if(FD_ISSET(eslave[i].fd, &rset)){
357 eb = newebuf(&eslave[i], eslave[i].n);
358 eb->n = read(eslave[i].fd, eb->u.buf, eslave[i].n);
371 for(i=0; i<MAXSLAVE; i++)
372 if((key & ~(1<<i)) == 0 && eslave[i].inuse == 0){
378 drawerror(display, "events: bad slave assignment");
389 drawerror(display, "events: mouse not initialized");
390 eb = ebread(&eslave[Smouse]);
403 drawerror(display, "events: keyboard not initialzed");
404 eb = ebread(&eslave[Skeyboard]);
413 _displaymoveto(display, pt);
417 esetcursor(Cursor *c)
419 _displaycursor(display, c, nil);
423 esetcursor2(Cursor *c, Cursor2 *c2)
425 _displaycursor(display, c, c2);
434 if(_displayrdmouse(display, m, &resized) < 0)