2 #include <sys/select.h>
10 typedef struct Slave Slave;
11 typedef struct Ebuf Ebuf;
16 Ebuf *head; /* queue of messages for this descriptor */
18 int (*fn)(int, Event*, uchar*, int);
28 int n; /* number of bytes in buf */
36 static Slave eslave[MAXSLAVE];
37 static int Skeyboard = -1;
38 static int Smouse = -1;
39 static int Stimer = -1;
42 static int newkey(ulong);
43 static int extract(int canblock);
54 s->head = s->head->next;
63 return eread(~0UL, e);
67 eread(ulong keys, Event *e)
75 for(i=0; i<nslave; i++)
76 if((keys & (1<<i)) && eslave[i].head){
80 else if(i == Skeyboard)
85 eb = ebread(&eslave[i]);
88 id = (*eslave[i].fn)(id, e, eb->u.buf, eb->n);
90 memmove(e->data, eb->u.buf, eb->n);
104 drawerror(display, "events: mouse not initialized");
105 return ecanread(Emouse);
112 drawerror(display, "events: keyboard not initialzed");
113 return ecanread(Ekeyboard);
122 for(i=0; i<nslave; i++)
123 if((keys & (1<<i)) && eslave[i].head)
132 estartfn(ulong key, int fd, int n, int (*fn)(int, Event*, uchar*, int))
137 drawerror(display, "events: bad file descriptor");
138 if(n <= 0 || n > EMAXMSG)
148 estart(ulong key, int fd, int n)
150 return estartfn(key, fd, n, nil);
154 etimer(ulong key, int n)
157 drawerror(display, "events: timer started twice");
158 Stimer = newkey(key);
161 eslave[Stimer].n = n;
162 eslave[Stimer].nexttick = nsec()+n*1000LL;
170 for(Skeyboard=0; Ekeyboard & ~(1<<Skeyboard); Skeyboard++)
172 eslave[Skeyboard].inuse = 1;
173 if(nslave <= Skeyboard)
174 nslave = Skeyboard+1;
177 for(Smouse=0; Emouse & ~(1<<Smouse); Smouse++)
179 eslave[Smouse].inuse = 1;
186 newebuf(Slave *s, int n)
190 eb = malloc(sizeof(*eb) - sizeof(eb->u.buf) + n);
192 drawerror(display, "events: out of memory");
196 s->tail = s->tail->next = eb;
198 s->head = s->tail = eb;
209 convW2M(&w, buf, sizeof buf);
210 return muxrpcstart(display->mux, buf);
214 finishrpc(Muxrpc *r, Wsysmsg *w)
219 if((p = muxrpccanfinish(r)) == nil)
228 extract(int canblock)
232 fd_set rset, wset, xset;
233 struct timeval tv, *timeout;
238 * Flush draw buffer before waiting for responses.
239 * Avoid doing so if buffer is empty.
240 * Also make sure that we don't interfere with app-specific locking.
242 if(display->locking){
244 * if locking is being done by program,
245 * this means it can't depend on automatic
246 * flush in emouse() etc.
248 if(canqlock(&display->qlock)){
249 if(display->bufp > display->buf)
250 flushimage(display, 1);
251 unlockdisplay(display);
254 if(display->bufp > display->buf)
255 flushimage(display, 1);
265 for(i=0; i<nslave; i++){
269 if(eslave[i].rpc == nil)
270 eslave[i].rpc = startrpc(Trdmouse);
272 FD_SET(display->srvfd, &rset);
273 FD_SET(display->srvfd, &xset);
274 if(display->srvfd > max)
275 max = display->srvfd;
277 }else if(i == Skeyboard){
278 if(eslave[i].rpc == nil)
279 eslave[i].rpc = startrpc(Trdkbd);
281 FD_SET(display->srvfd, &rset);
282 FD_SET(display->srvfd, &xset);
283 if(display->srvfd > max)
284 max = display->srvfd;
286 }else if(i == Stimer){
288 if(t0-eslave[i].nexttick <= 0){
292 tv.tv_sec = (t0-eslave[i].nexttick)/1000000000;
293 tv.tv_usec = (t0-eslave[i].nexttick)%1000000000 / 1000;
297 FD_SET(eslave[i].fd, &rset);
298 FD_SET(eslave[i].fd, &xset);
299 if(eslave[i].fd > max)
310 if(select(max+1, &rset, &wset, &xset, timeout) < 0)
311 drawerror(display, "select failure");
314 * Look to see what can proceed.
317 for(i=0; i<nslave; i++){
321 if(finishrpc(eslave[i].rpc, &w)){
323 eb = newebuf(&eslave[i], sizeof(Mouse));
324 eb->u.mouse = w.mouse;
329 }else if(i == Skeyboard){
330 if(finishrpc(eslave[i].rpc, &w)){
332 eb = newebuf(&eslave[i], sizeof(Rune)+2); /* +8: alignment */
336 }else if(i == Stimer){
338 while(t0-eslave[i].nexttick > 0){
339 eslave[i].nexttick += eslave[i].n*1000LL;
340 eslave[i].head = (Ebuf*)1;
344 if(FD_ISSET(eslave[i].fd, &rset)){
345 eb = newebuf(&eslave[i], eslave[i].n);
346 eb->n = read(eslave[i].fd, eb->u.buf, eslave[i].n);
359 for(i=0; i<MAXSLAVE; i++)
360 if((key & ~(1<<i)) == 0 && eslave[i].inuse == 0){
366 drawerror(display, "events: bad slave assignment");
377 drawerror(display, "events: mouse not initialized");
378 eb = ebread(&eslave[Smouse]);
391 drawerror(display, "events: keyboard not initialzed");
392 eb = ebread(&eslave[Skeyboard]);
401 _displaymoveto(display, pt);
405 esetcursor(Cursor *c)
407 _displaycursor(display, c);
416 if(_displayrdmouse(display, m, &resized) < 0)