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526b5580da
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21070 a1c6a512-1295-4272-9138-f99709370657
48 lines
1.1 KiB
C
48 lines
1.1 KiB
C
/* Copyright (c) 1997-2000 Miller Puckette.
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* For information on usage and redistribution, and for a DISCLAIMER OF ALL
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* WARRANTIES, see the file, "LICENSE.txt," in this distribution. */
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/* This file is compiled into the separate program, "pd-watchdog," which
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tries to prevent Pd from locking up the processor if it's at realtime
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priority. Linux only. Invoked from s_inter.c. */
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#include <sys/time.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <signal.h>
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#include <stdio.h>
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int main(int argc, char **argv)
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{
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int happy = 1;
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while (1)
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{
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struct timeval timout;
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fd_set readset;
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if (happy)
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{
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timout.tv_sec = 5;
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timout.tv_usec = 0;
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}
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else
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{
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timout.tv_sec = 2;
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timout.tv_usec = 0;
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}
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FD_ZERO(&readset);
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FD_SET(0, &readset);
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select(1, &readset, 0, 0, &timout);
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if (FD_ISSET(0, &readset))
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{
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char buf[100];
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happy = 1;
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if (read(0, &buf, 100) <= 0)
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return (0);
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else continue;
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}
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happy = 0;
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kill(getppid(), SIGHUP);
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fprintf(stderr, "watchdog: signaling pd...\n");
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}
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}
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