diff options
Diffstat (limited to 'pd/src/s_watchdog.c')
-rw-r--r-- | pd/src/s_watchdog.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/pd/src/s_watchdog.c b/pd/src/s_watchdog.c new file mode 100644 index 00000000..a2122824 --- /dev/null +++ b/pd/src/s_watchdog.c @@ -0,0 +1,47 @@ +/* Copyright (c) 1997-2000 Miller Puckette. +* For information on usage and redistribution, and for a DISCLAIMER OF ALL +* WARRANTIES, see the file, "LICENSE.txt," in this distribution. */ + +/* This file is compiled into the separate program, "pd-watchdog," which +tries to prevent Pd from locking up the processor if it's at realtime +priority. Linux only. Invoked from s_inter.c. */ + +#include <sys/time.h> +#include <sys/types.h> +#include <unistd.h> +#include <signal.h> +#include <stdio.h> + +int main(int argc, char **argv) +{ + int happy = 1; + while (1) + { + struct timeval timout; + fd_set readset; + if (happy) + { + timout.tv_sec = 5; + timout.tv_usec = 0; + } + else + { + timout.tv_sec = 2; + timout.tv_usec = 0; + } + FD_ZERO(&readset); + FD_SET(0, &readset); + select(1, &readset, 0, 0, &timout); + if (FD_ISSET(0, &readset)) + { + char buf[100]; + happy = 1; + if (read(0, &buf, 100) <= 0) + return (0); + else continue; + } + happy = 0; + kill(getppid(), SIGHUP); + fprintf(stderr, "watchdog: signaling pd...\n"); + } +} |