From 7a73162607544204032aa66cce755daf21edebda Mon Sep 17 00:00:00 2001 From: Matt Strapp Date: Tue, 24 May 2022 11:18:46 -0500 Subject: Graduate Signed-off-by: Matt Strapp --- csci4061/110920_breakout/chap8/pgm_8_1.c | 42 ++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 csci4061/110920_breakout/chap8/pgm_8_1.c (limited to 'csci4061/110920_breakout/chap8/pgm_8_1.c') diff --git a/csci4061/110920_breakout/chap8/pgm_8_1.c b/csci4061/110920_breakout/chap8/pgm_8_1.c new file mode 100644 index 0000000..a979bb6 --- /dev/null +++ b/csci4061/110920_breakout/chap8/pgm_8_1.c @@ -0,0 +1,42 @@ +// Program 8.1 + +#include +#include +#include +#include +#include + +int main(int argc, char *argv[]) { + int i; + sigset_t intmask; + int repeatfactor; + double y = 0.0; + + if (argc != 2) { + fprintf(stderr, "Usage: %s repeatfactor\n", argv[0]); + return 1; + } + repeatfactor = atoi(argv[1]); + if ((sigemptyset(&intmask) == -1) || (sigaddset(&intmask, SIGINT) == -1)){ + perror("Failed to initialize the signal mask"); + return 1; + } + for ( ; ; ) { + if (sigprocmask(SIG_BLOCK, &intmask, NULL) == -1) + break; + fprintf(stderr, "SIGINT signal blocked\n"); + for (i = 0; i < repeatfactor; i++) + y += sin((double)i); + fprintf(stderr, "Blocked calculation is finished, y = %f\n", y); + sleep(3); + if (sigprocmask(SIG_UNBLOCK, &intmask, NULL) == -1) + break; + fprintf(stderr, "SIGINT signal unblocked\n"); + for (i = 0; i < repeatfactor; i++) + y += sin((double)i); + fprintf(stderr, "Unblocked calculation is finished, y=%f\n", y); + sleep(3); + } + perror("Failed to change signal mask"); + return 1; +} \ No newline at end of file -- cgit v1.2.3