1 257fb626 2006-06-25 devnull /* Copyright (c) 2006 Russ Cox */
  2 257fb626 2006-06-25 devnull 
  3 257fb626 2006-06-25 devnull #include <u.h>
  4 150f8802 2006-06-25 devnull #include <sys/select.h>
  5 257fb626 2006-06-25 devnull #include <libc.h>
  6 257fb626 2006-06-25 devnull #include <draw.h>
  7 257fb626 2006-06-25 devnull #include <mouse.h>
  8 257fb626 2006-06-25 devnull #include <cursor.h>
  9 257fb626 2006-06-25 devnull #include <drawfcall.h>
 10 257fb626 2006-06-25 devnull #include <mux.h>
 11 257fb626 2006-06-25 devnull 
 12 257fb626 2006-06-25 devnull int chattydrawclient;
 13 257fb626 2006-06-25 devnull 
 14 257fb626 2006-06-25 devnull static int	drawgettag(Mux *mux, void *vmsg);
 15 257fb626 2006-06-25 devnull static void*	drawrecv(Mux *mux);
 16 150f8802 2006-06-25 devnull static void*	drawnbrecv(Mux *mux);
 17 257fb626 2006-06-25 devnull static int	drawsend(Mux *mux, void *vmsg);
 18 257fb626 2006-06-25 devnull static int	drawsettag(Mux *mux, void *vmsg, uint tag);
 19 150f8802 2006-06-25 devnull static int canreadfd(int);
 20 257fb626 2006-06-25 devnull 
 21 257fb626 2006-06-25 devnull int
 22 257fb626 2006-06-25 devnull _displayconnect(Display *d)
 23 257fb626 2006-06-25 devnull {
 24 257fb626 2006-06-25 devnull 	int pid, p[2];
 25 257fb626 2006-06-25 devnull 	
 26 257fb626 2006-06-25 devnull 	fmtinstall('W', drawfcallfmt);
 27 257fb626 2006-06-25 devnull 	fmtinstall('H', encodefmt);
 28 257fb626 2006-06-25 devnull 	
 29 257fb626 2006-06-25 devnull 	if(pipe(p) < 0)
 30 257fb626 2006-06-25 devnull 		return -1;
 31 257fb626 2006-06-25 devnull 	if((pid=fork()) < 0){
 32 257fb626 2006-06-25 devnull 		close(p[0]);
 33 257fb626 2006-06-25 devnull 		close(p[1]);
 34 257fb626 2006-06-25 devnull 		return -1;
 35 257fb626 2006-06-25 devnull 	}
 36 257fb626 2006-06-25 devnull 	if(pid == 0){
 37 257fb626 2006-06-25 devnull 		close(p[0]);
 38 257fb626 2006-06-25 devnull 		dup(p[1], 0);
 39 257fb626 2006-06-25 devnull 		dup(p[1], 1);
 40 257fb626 2006-06-25 devnull 		/* execl("strace", "strace", "-o", "drawsrv.out", "drawsrv", nil); */
 41 19f4cef5 2006-06-26 devnull 		/*
 42 19f4cef5 2006-06-26 devnull 		 * The argv0 has no meaning to devdraw.
 43 19f4cef5 2006-06-26 devnull 		 * Pass it along only so that the various
 44 19f4cef5 2006-06-26 devnull 		 * devdraws in psu -a can be distinguished.
 45 19f4cef5 2006-06-26 devnull 		 */
 46 19f4cef5 2006-06-26 devnull 		execl("devdraw", "devdraw", argv0, nil);
 47 150f8802 2006-06-25 devnull 		sysfatal("exec devdraw: %r");
 48 257fb626 2006-06-25 devnull 	}
 49 257fb626 2006-06-25 devnull 	close(p[1]);
 50 257fb626 2006-06-25 devnull 	d->srvfd = p[0];
 51 257fb626 2006-06-25 devnull 	return 0;
 52 257fb626 2006-06-25 devnull }
 53 257fb626 2006-06-25 devnull 
 54 257fb626 2006-06-25 devnull int
 55 257fb626 2006-06-25 devnull _displaymux(Display *d)
 56 257fb626 2006-06-25 devnull {
 57 257fb626 2006-06-25 devnull 	if((d->mux = mallocz(sizeof(*d->mux), 1)) == nil)
 58 257fb626 2006-06-25 devnull 		return -1;
 59 257fb626 2006-06-25 devnull 
 60 257fb626 2006-06-25 devnull 	d->mux->mintag = 1;
 61 257fb626 2006-06-25 devnull 	d->mux->maxtag = 255;
 62 257fb626 2006-06-25 devnull 	d->mux->send = drawsend;
 63 257fb626 2006-06-25 devnull 	d->mux->recv = drawrecv;
 64 150f8802 2006-06-25 devnull 	d->mux->nbrecv = drawnbrecv;
 65 257fb626 2006-06-25 devnull 	d->mux->gettag = drawgettag;
 66 257fb626 2006-06-25 devnull 	d->mux->settag = drawsettag;
 67 257fb626 2006-06-25 devnull 	d->mux->aux = d;
 68 257fb626 2006-06-25 devnull 	muxinit(d->mux);
 69 257fb626 2006-06-25 devnull 	
 70 257fb626 2006-06-25 devnull 	return 0;
 71 257fb626 2006-06-25 devnull }
 72 257fb626 2006-06-25 devnull 
 73 257fb626 2006-06-25 devnull static int
 74 257fb626 2006-06-25 devnull drawsend(Mux *mux, void *vmsg)
 75 257fb626 2006-06-25 devnull {
 76 257fb626 2006-06-25 devnull 	int n;
 77 257fb626 2006-06-25 devnull 	uchar *msg;
 78 257fb626 2006-06-25 devnull 	Display *d;
 79 257fb626 2006-06-25 devnull 	
 80 257fb626 2006-06-25 devnull 	msg = vmsg;
 81 257fb626 2006-06-25 devnull 	GET(msg, n);
 82 257fb626 2006-06-25 devnull 	d = mux->aux;
 83 257fb626 2006-06-25 devnull 	return write(d->srvfd, msg, n);
 84 257fb626 2006-06-25 devnull }
 85 257fb626 2006-06-25 devnull 
 86 257fb626 2006-06-25 devnull static void*
 87 150f8802 2006-06-25 devnull _drawrecv(Mux *mux, int nb)
 88 257fb626 2006-06-25 devnull {
 89 257fb626 2006-06-25 devnull 	int n;
 90 257fb626 2006-06-25 devnull 	uchar buf[4], *p;
 91 257fb626 2006-06-25 devnull 	Display *d;
 92 150f8802 2006-06-25 devnull 
 93 257fb626 2006-06-25 devnull 	d = mux->aux;
 94 150f8802 2006-06-25 devnull 	if(nb && !canreadfd(d->srvfd))
 95 257fb626 2006-06-25 devnull 		return nil;
 96 150f8802 2006-06-25 devnull 	if((n=readn(d->srvfd, buf, 4)) != 4)
 97 150f8802 2006-06-25 devnull 		return nil;
 98 257fb626 2006-06-25 devnull 	GET(buf, n);
 99 257fb626 2006-06-25 devnull 	p = malloc(n);
100 257fb626 2006-06-25 devnull 	if(p == nil){
101 257fb626 2006-06-25 devnull 		fprint(2, "out of memory allocating %d in drawrecv\n", n);
102 257fb626 2006-06-25 devnull 		return nil;
103 257fb626 2006-06-25 devnull 	}
104 257fb626 2006-06-25 devnull 	memmove(p, buf, 4);
105 150f8802 2006-06-25 devnull 	if(readn(d->srvfd, p+4, n-4) != n-4)
106 257fb626 2006-06-25 devnull 		return nil;
107 257fb626 2006-06-25 devnull 	return p;
108 257fb626 2006-06-25 devnull }
109 257fb626 2006-06-25 devnull 
110 150f8802 2006-06-25 devnull static void*
111 150f8802 2006-06-25 devnull drawrecv(Mux *mux)
112 150f8802 2006-06-25 devnull {
113 150f8802 2006-06-25 devnull 	return _drawrecv(mux, 0);
114 150f8802 2006-06-25 devnull }
115 150f8802 2006-06-25 devnull 
116 150f8802 2006-06-25 devnull static void*
117 150f8802 2006-06-25 devnull drawnbrecv(Mux *mux)
118 150f8802 2006-06-25 devnull {
119 150f8802 2006-06-25 devnull 	return _drawrecv(mux, 1);
120 150f8802 2006-06-25 devnull }
121 150f8802 2006-06-25 devnull 
122 257fb626 2006-06-25 devnull static int
123 257fb626 2006-06-25 devnull drawgettag(Mux *mux, void *vmsg)
124 257fb626 2006-06-25 devnull {
125 257fb626 2006-06-25 devnull 	USED(mux);
126 257fb626 2006-06-25 devnull 	uchar *msg;
127 257fb626 2006-06-25 devnull 	
128 257fb626 2006-06-25 devnull 	msg = vmsg;
129 257fb626 2006-06-25 devnull 	return msg[4];
130 257fb626 2006-06-25 devnull }
131 257fb626 2006-06-25 devnull 
132 257fb626 2006-06-25 devnull static int
133 257fb626 2006-06-25 devnull drawsettag(Mux *mux, void *vmsg, uint tag)
134 257fb626 2006-06-25 devnull {
135 257fb626 2006-06-25 devnull 	USED(mux);
136 257fb626 2006-06-25 devnull 	uchar *msg;
137 257fb626 2006-06-25 devnull 	
138 257fb626 2006-06-25 devnull 	msg = vmsg;
139 257fb626 2006-06-25 devnull 	msg[4] = tag;
140 257fb626 2006-06-25 devnull 	return 0;
141 257fb626 2006-06-25 devnull }
142 257fb626 2006-06-25 devnull 
143 257fb626 2006-06-25 devnull static int
144 257fb626 2006-06-25 devnull displayrpc(Display *d, Wsysmsg *tx, Wsysmsg *rx, void **freep)
145 257fb626 2006-06-25 devnull {
146 257fb626 2006-06-25 devnull 	int n, nn;
147 257fb626 2006-06-25 devnull 	void *tpkt, *rpkt;
148 257fb626 2006-06-25 devnull 	
149 257fb626 2006-06-25 devnull 	n = sizeW2M(tx);
150 257fb626 2006-06-25 devnull 	tpkt = malloc(n);
151 257fb626 2006-06-25 devnull 	if(freep)
152 257fb626 2006-06-25 devnull 		*freep = nil;
153 257fb626 2006-06-25 devnull 	if(tpkt == nil)
154 257fb626 2006-06-25 devnull 		return -1;
155 257fb626 2006-06-25 devnull 	tx->tag = 0;
156 257fb626 2006-06-25 devnull 	if(chattydrawclient)
157 257fb626 2006-06-25 devnull 		fprint(2, "<- %W\n", tx);
158 257fb626 2006-06-25 devnull 	nn = convW2M(tx, tpkt, n);
159 257fb626 2006-06-25 devnull 	if(nn != n){
160 257fb626 2006-06-25 devnull 		free(tpkt);
161 257fb626 2006-06-25 devnull 		werrstr("drawclient: sizeW2M convW2M mismatch");
162 257fb626 2006-06-25 devnull 		fprint(2, "%r\n");
163 257fb626 2006-06-25 devnull 		return -1;
164 257fb626 2006-06-25 devnull 	}
165 19f4cef5 2006-06-26 devnull 	/*
166 19f4cef5 2006-06-26 devnull 	 * This is the only point where we might reschedule.
167 19f4cef5 2006-06-26 devnull 	 * Muxrpc might need to acquire d->mux->lk, which could
168 19f4cef5 2006-06-26 devnull 	 * be held by some other proc (e.g., the one reading from
169 19f4cef5 2006-06-26 devnull 	 * the keyboard via Trdkbd messages).  If we need to wait
170 19f4cef5 2006-06-26 devnull 	 * for the lock, don't let other threads from this proc
171 19f4cef5 2006-06-26 devnull 	 * run.  This keeps up the appearance that writes to /dev/draw
172 19f4cef5 2006-06-26 devnull 	 * don't cause rescheduling.  If you *do* allow rescheduling
173 19f4cef5 2006-06-26 devnull 	 * here, then flushimage(display, 1) happening in two different
174 19f4cef5 2006-06-26 devnull 	 * threads in the same proc can cause a buffer of commands
175 19f4cef5 2006-06-26 devnull 	 * to be written out twice, leading to interesting results
176 19f4cef5 2006-06-26 devnull 	 * on the screen.
177 19f4cef5 2006-06-26 devnull 	 *
178 19f4cef5 2006-06-26 devnull 	 * Threadpin and threadunpin were added to the thread library
179 19f4cef5 2006-06-26 devnull 	 * to solve exactly this problem.  Be careful!  They are dangerous.
180 19f4cef5 2006-06-26 devnull 	 *
181 19f4cef5 2006-06-26 devnull 	 * _pin and _unpin are aliases for threadpin and threadunpin
182 19f4cef5 2006-06-26 devnull 	 * in a threaded program and are no-ops in unthreaded programs.
183 19f4cef5 2006-06-26 devnull 	 */
184 19f4cef5 2006-06-26 devnull 	_pin();
185 257fb626 2006-06-25 devnull 	rpkt = muxrpc(d->mux, tpkt);
186 19f4cef5 2006-06-26 devnull 	_unpin();
187 257fb626 2006-06-25 devnull 	free(tpkt);
188 257fb626 2006-06-25 devnull 	if(rpkt == nil){
189 257fb626 2006-06-25 devnull 		werrstr("muxrpc: %r");
190 257fb626 2006-06-25 devnull 		return -1;
191 257fb626 2006-06-25 devnull 	}
192 257fb626 2006-06-25 devnull 	GET((uchar*)rpkt, n);
193 257fb626 2006-06-25 devnull 	nn = convM2W(rpkt, n, rx);
194 257fb626 2006-06-25 devnull 	if(nn != n){
195 257fb626 2006-06-25 devnull 		free(rpkt);
196 257fb626 2006-06-25 devnull 		werrstr("drawclient: convM2W packet size mismatch %d %d %.*H", n, nn, n, rpkt);
197 257fb626 2006-06-25 devnull 		fprint(2, "%r\n");
198 257fb626 2006-06-25 devnull 		return -1;
199 257fb626 2006-06-25 devnull 	}
200 257fb626 2006-06-25 devnull 	if(chattydrawclient)
201 257fb626 2006-06-25 devnull 		fprint(2, "-> %W\n", rx);
202 257fb626 2006-06-25 devnull 	if(rx->type == Rerror){
203 257fb626 2006-06-25 devnull 		werrstr("%s", rx->error);
204 257fb626 2006-06-25 devnull 		free(rpkt);
205 257fb626 2006-06-25 devnull 		return -1;
206 257fb626 2006-06-25 devnull 	}
207 257fb626 2006-06-25 devnull 	if(rx->type != tx->type+1){
208 257fb626 2006-06-25 devnull 		werrstr("packet type mismatch -- tx %d rx %d",
209 257fb626 2006-06-25 devnull 			tx->type, rx->type);
210 257fb626 2006-06-25 devnull 		free(rpkt);
211 257fb626 2006-06-25 devnull 		return -1;
212 257fb626 2006-06-25 devnull 	}
213 257fb626 2006-06-25 devnull 	if(freep)
214 257fb626 2006-06-25 devnull 		*freep = rpkt;
215 257fb626 2006-06-25 devnull 	else
216 257fb626 2006-06-25 devnull 		free(rpkt);
217 257fb626 2006-06-25 devnull 	return 0;
218 257fb626 2006-06-25 devnull }
219 257fb626 2006-06-25 devnull 
220 257fb626 2006-06-25 devnull int
221 257fb626 2006-06-25 devnull _displayinit(Display *d, char *label, char *winsize)
222 257fb626 2006-06-25 devnull {
223 257fb626 2006-06-25 devnull 	Wsysmsg tx, rx;
224 257fb626 2006-06-25 devnull 
225 257fb626 2006-06-25 devnull 	tx.type = Tinit;
226 150f8802 2006-06-25 devnull 	tx.label = label;
227 150f8802 2006-06-25 devnull 	tx.winsize = winsize;
228 257fb626 2006-06-25 devnull 	return displayrpc(d, &tx, &rx, nil);
229 257fb626 2006-06-25 devnull }
230 257fb626 2006-06-25 devnull 
231 257fb626 2006-06-25 devnull int
232 257fb626 2006-06-25 devnull _displayrdmouse(Display *d, Mouse *m, int *resized)
233 257fb626 2006-06-25 devnull {
234 257fb626 2006-06-25 devnull 	Wsysmsg tx, rx;
235 257fb626 2006-06-25 devnull 
236 257fb626 2006-06-25 devnull 	tx.type = Trdmouse;
237 257fb626 2006-06-25 devnull 	if(displayrpc(d, &tx, &rx, nil) < 0)
238 257fb626 2006-06-25 devnull 		return -1;
239 257fb626 2006-06-25 devnull 	*m = rx.mouse;
240 257fb626 2006-06-25 devnull 	*resized = rx.resized;
241 257fb626 2006-06-25 devnull 	return 0;
242 257fb626 2006-06-25 devnull }
243 257fb626 2006-06-25 devnull 
244 257fb626 2006-06-25 devnull int
245 257fb626 2006-06-25 devnull _displayrdkbd(Display *d, Rune *r)
246 257fb626 2006-06-25 devnull {
247 257fb626 2006-06-25 devnull 	Wsysmsg tx, rx;
248 257fb626 2006-06-25 devnull 
249 257fb626 2006-06-25 devnull 	tx.type = Trdkbd;
250 257fb626 2006-06-25 devnull 	if(displayrpc(d, &tx, &rx, nil) < 0)
251 257fb626 2006-06-25 devnull 		return -1;
252 257fb626 2006-06-25 devnull 	*r = rx.rune;
253 257fb626 2006-06-25 devnull 	return 0;
254 257fb626 2006-06-25 devnull }
255 257fb626 2006-06-25 devnull 
256 257fb626 2006-06-25 devnull int
257 257fb626 2006-06-25 devnull _displaymoveto(Display *d, Point p)
258 257fb626 2006-06-25 devnull {
259 257fb626 2006-06-25 devnull 	Wsysmsg tx, rx;
260 257fb626 2006-06-25 devnull 
261 257fb626 2006-06-25 devnull 	tx.type = Tmoveto;
262 257fb626 2006-06-25 devnull 	tx.mouse.xy = p;
263 257fb626 2006-06-25 devnull 	return displayrpc(d, &tx, &rx, nil);
264 257fb626 2006-06-25 devnull }
265 257fb626 2006-06-25 devnull 
266 257fb626 2006-06-25 devnull int
267 257fb626 2006-06-25 devnull _displaycursor(Display *d, Cursor *c)
268 257fb626 2006-06-25 devnull {
269 257fb626 2006-06-25 devnull 	Wsysmsg tx, rx;
270 257fb626 2006-06-25 devnull 	
271 257fb626 2006-06-25 devnull 	tx.type = Tcursor;
272 257fb626 2006-06-25 devnull 	if(c == nil){
273 257fb626 2006-06-25 devnull 		memset(&tx.cursor, 0, sizeof tx.cursor);
274 257fb626 2006-06-25 devnull 		tx.arrowcursor = 1;
275 257fb626 2006-06-25 devnull 	}else{
276 257fb626 2006-06-25 devnull 		tx.arrowcursor = 0;
277 257fb626 2006-06-25 devnull 		tx.cursor = *c;
278 257fb626 2006-06-25 devnull 	}
279 257fb626 2006-06-25 devnull 	return displayrpc(d, &tx, &rx, nil);
280 257fb626 2006-06-25 devnull }
281 257fb626 2006-06-25 devnull 
282 257fb626 2006-06-25 devnull int
283 257fb626 2006-06-25 devnull _displaybouncemouse(Display *d, Mouse *m)
284 257fb626 2006-06-25 devnull {
285 257fb626 2006-06-25 devnull 	Wsysmsg tx, rx;
286 257fb626 2006-06-25 devnull 	
287 257fb626 2006-06-25 devnull 	tx.type = Tbouncemouse;
288 257fb626 2006-06-25 devnull 	tx.mouse = *m;
289 257fb626 2006-06-25 devnull 	return displayrpc(d, &tx, &rx, nil);
290 257fb626 2006-06-25 devnull }
291 257fb626 2006-06-25 devnull 
292 257fb626 2006-06-25 devnull int
293 257fb626 2006-06-25 devnull _displaylabel(Display *d, char *label)
294 257fb626 2006-06-25 devnull {
295 257fb626 2006-06-25 devnull 	Wsysmsg tx, rx;
296 257fb626 2006-06-25 devnull 	
297 257fb626 2006-06-25 devnull 	tx.type = Tlabel;
298 257fb626 2006-06-25 devnull 	tx.label = label;
299 257fb626 2006-06-25 devnull 	return displayrpc(d, &tx, &rx, nil);
300 257fb626 2006-06-25 devnull }
301 257fb626 2006-06-25 devnull 
302 257fb626 2006-06-25 devnull char*
303 257fb626 2006-06-25 devnull _displayrdsnarf(Display *d)
304 257fb626 2006-06-25 devnull {
305 257fb626 2006-06-25 devnull 	void *p;
306 257fb626 2006-06-25 devnull 	char *s;
307 257fb626 2006-06-25 devnull 	Wsysmsg tx, rx;
308 257fb626 2006-06-25 devnull 	
309 257fb626 2006-06-25 devnull 	tx.type = Trdsnarf;
310 257fb626 2006-06-25 devnull 	if(displayrpc(d, &tx, &rx, &p) < 0)
311 257fb626 2006-06-25 devnull 		return nil;
312 257fb626 2006-06-25 devnull 	s = strdup(rx.snarf);
313 257fb626 2006-06-25 devnull 	free(p);
314 257fb626 2006-06-25 devnull 	return s;
315 257fb626 2006-06-25 devnull }
316 257fb626 2006-06-25 devnull 
317 257fb626 2006-06-25 devnull int
318 257fb626 2006-06-25 devnull _displaywrsnarf(Display *d, char *snarf)
319 257fb626 2006-06-25 devnull {
320 257fb626 2006-06-25 devnull 	Wsysmsg tx, rx;
321 257fb626 2006-06-25 devnull 	
322 257fb626 2006-06-25 devnull 	tx.type = Twrsnarf;
323 257fb626 2006-06-25 devnull 	tx.snarf = snarf;
324 257fb626 2006-06-25 devnull 	return displayrpc(d, &tx, &rx, nil);
325 257fb626 2006-06-25 devnull }
326 257fb626 2006-06-25 devnull 
327 257fb626 2006-06-25 devnull int
328 257fb626 2006-06-25 devnull _displayrddraw(Display *d, void *v, int n)
329 257fb626 2006-06-25 devnull {
330 257fb626 2006-06-25 devnull 	void *p;
331 257fb626 2006-06-25 devnull 	Wsysmsg tx, rx;
332 257fb626 2006-06-25 devnull 	
333 257fb626 2006-06-25 devnull 	tx.type = Trddraw;
334 257fb626 2006-06-25 devnull 	tx.count = n;
335 257fb626 2006-06-25 devnull 	if(displayrpc(d, &tx, &rx, &p) < 0)
336 257fb626 2006-06-25 devnull 		return -1;
337 257fb626 2006-06-25 devnull 	memmove(v, rx.data, rx.count);
338 257fb626 2006-06-25 devnull 	free(p);
339 257fb626 2006-06-25 devnull 	return rx.count;
340 257fb626 2006-06-25 devnull }
341 257fb626 2006-06-25 devnull 
342 257fb626 2006-06-25 devnull int
343 257fb626 2006-06-25 devnull _displaywrdraw(Display *d, void *v, int n)
344 257fb626 2006-06-25 devnull {
345 257fb626 2006-06-25 devnull 	Wsysmsg tx, rx;
346 257fb626 2006-06-25 devnull 	
347 257fb626 2006-06-25 devnull 	tx.type = Twrdraw;
348 257fb626 2006-06-25 devnull 	tx.count = n;
349 257fb626 2006-06-25 devnull 	tx.data = v;
350 257fb626 2006-06-25 devnull 	if(displayrpc(d, &tx, &rx, nil) < 0)
351 257fb626 2006-06-25 devnull 		return -1;
352 257fb626 2006-06-25 devnull 	return rx.count;
353 257fb626 2006-06-25 devnull }
354 257fb626 2006-06-25 devnull 
355 257fb626 2006-06-25 devnull int
356 257fb626 2006-06-25 devnull _displaytop(Display *d)
357 257fb626 2006-06-25 devnull {
358 257fb626 2006-06-25 devnull 	Wsysmsg tx, rx;
359 257fb626 2006-06-25 devnull 
360 257fb626 2006-06-25 devnull 	tx.type = Ttop;
361 257fb626 2006-06-25 devnull 	return displayrpc(d, &tx, &rx, nil);
362 257fb626 2006-06-25 devnull }
363 257fb626 2006-06-25 devnull 
364 257fb626 2006-06-25 devnull int
365 257fb626 2006-06-25 devnull _displayresize(Display *d, Rectangle r)
366 257fb626 2006-06-25 devnull {
367 257fb626 2006-06-25 devnull 	Wsysmsg tx, rx;
368 257fb626 2006-06-25 devnull 	
369 257fb626 2006-06-25 devnull 	tx.type = Tresize;
370 257fb626 2006-06-25 devnull 	tx.rect = r;
371 257fb626 2006-06-25 devnull 	return displayrpc(d, &tx, &rx, nil);
372 257fb626 2006-06-25 devnull }
373 257fb626 2006-06-25 devnull 
374 150f8802 2006-06-25 devnull static int
375 150f8802 2006-06-25 devnull canreadfd(int fd)
376 150f8802 2006-06-25 devnull {
377 150f8802 2006-06-25 devnull 	fd_set rs, ws, xs;
378 150f8802 2006-06-25 devnull 	struct timeval tv;
379 150f8802 2006-06-25 devnull 	
380 150f8802 2006-06-25 devnull 	FD_ZERO(&rs);
381 150f8802 2006-06-25 devnull 	FD_ZERO(&ws);
382 150f8802 2006-06-25 devnull 	FD_ZERO(&xs);
383 150f8802 2006-06-25 devnull 	FD_SET(fd, &rs);
384 150f8802 2006-06-25 devnull 	FD_SET(fd, &xs);
385 150f8802 2006-06-25 devnull 	tv.tv_sec = 0;
386 150f8802 2006-06-25 devnull 	tv.tv_usec = 0;
387 150f8802 2006-06-25 devnull 	if(select(fd+1, &rs, &ws, &xs, &tv) < 0)
388 150f8802 2006-06-25 devnull 		return 0;
389 150f8802 2006-06-25 devnull 	if(FD_ISSET(fd, &rs) || FD_ISSET(fd, &xs))
390 150f8802 2006-06-25 devnull 		return 1;
391 150f8802 2006-06-25 devnull 	return 0;
392 150f8802 2006-06-25 devnull }
393 150f8802 2006-06-25 devnull