Annotation of src/usr.bin/window/wwflush.c, Revision 1.3
1.3 ! deraadt 1: /* $OpenBSD: wwflush.c,v 1.5 1995/12/21 10:46:08 mycroft Exp $ */
1.2 deraadt 2: /* $NetBSD: wwflush.c,v 1.5 1995/12/21 10:46:08 mycroft Exp $ */
1.1 deraadt 3:
4: /*
5: * Copyright (c) 1983, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * This code is derived from software contributed to Berkeley by
9: * Edward Wang at The University of California, Berkeley.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
19: * 3. All advertising materials mentioning features or use of this software
20: * must display the following acknowledgement:
21: * This product includes software developed by the University of
22: * California, Berkeley and its contributors.
23: * 4. Neither the name of the University nor the names of its contributors
24: * may be used to endorse or promote products derived from this software
25: * without specific prior written permission.
26: *
27: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37: * SUCH DAMAGE.
38: */
39:
40: #ifndef lint
41: #if 0
42: static char sccsid[] = "@(#)wwflush.c 8.1 (Berkeley) 6/6/93";
43: #else
1.3 ! deraadt 44: static char rcsid[] = "$OpenBSD: wwflush.c,v 1.5 1995/12/21 10:46:08 mycroft Exp $";
1.1 deraadt 45: #endif
46: #endif /* not lint */
47:
48: #include "ww.h"
49: #include "tt.h"
50: #include <sys/signal.h>
51:
52: wwflush()
53: {
54: register row, col;
55:
56: if ((row = wwcursorrow) < 0)
57: row = 0;
58: else if (row >= wwnrow)
59: row = wwnrow - 1;
60: if ((col = wwcursorcol) < 0)
61: col = 0;
62: else if (col >= wwncol)
63: col = wwncol - 1;
64: xxmove(row, col);
65: if (wwdocheckpoint) {
66: xxflush(0);
67: wwcheckpoint();
68: } else
69: xxflush(1);
70: }
71:
72: wwcheckpoint()
73: {
1.2 deraadt 74: sigset_t sigset, osigset;
75:
76: sigemptyset(&sigset);
77: sigaddset(&sigset, SIGALRM);
78: sigprocmask(SIG_BLOCK, &sigset, &osigset);
1.1 deraadt 79:
80: tt.tt_ack = 0;
81: do {
82: (*tt.tt_checkpoint)();
83: #ifndef OLD_TTY
84: (void) tcdrain(1);
85: #endif
86: (void) alarm(3);
87: for (wwdocheckpoint = 0; !wwdocheckpoint && tt.tt_ack == 0;)
1.2 deraadt 88: sigsuspend(&osigset);
1.1 deraadt 89: } while (tt.tt_ack == 0);
90: (void) alarm(0);
91: wwdocheckpoint = 0;
92: if (tt.tt_ack < 0) {
93: wwcopyscreen(wwcs, wwos);
94: (void) alarm(1);
95: wwreset();
96: wwupdate();
97: wwflush();
98: } else {
99: wwcopyscreen(wwos, wwcs);
100: (void) alarm(3);
101: }
1.2 deraadt 102:
103: sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0);
1.1 deraadt 104: }
105:
106: wwcopyscreen(s1, s2)
107: register union ww_char **s1, **s2;
108: {
109: register i;
110: register s = wwncol * sizeof **s1;
111:
112: for (i = wwnrow; --i >= 0;)
113: bcopy((char *) *s1++, (char *) *s2++, s);
114: }
115:
116: void
117: wwalarm()
118: {
119: wwdocheckpoint = 1;
120: }