From 6d43c0a6de1e854c6a09915b878d4f59e6a572c1 Mon Sep 17 00:00:00 2001 From: RossTheRoss Date: Mon, 9 Nov 2020 08:26:54 -0600 Subject: Add new breakout --- csci4061/110920_breakout/chap8/Makefile | 12 ++++++++ csci4061/110920_breakout/chap8/pgm_8_1.c | 42 ++++++++++++++++++++++++++ csci4061/110920_breakout/chap8/pgm_8_5.c | 43 ++++++++++++++++++++++++++ csci4061/110920_breakout/sol1.c | 37 +++++++++++++++++++++++ csci4061/110920_breakout/sol2.c | 52 ++++++++++++++++++++++++++++++++ 5 files changed, 186 insertions(+) create mode 100644 csci4061/110920_breakout/chap8/Makefile create mode 100644 csci4061/110920_breakout/chap8/pgm_8_1.c create mode 100644 csci4061/110920_breakout/chap8/pgm_8_5.c create mode 100644 csci4061/110920_breakout/sol1.c create mode 100644 csci4061/110920_breakout/sol2.c (limited to 'csci4061') diff --git a/csci4061/110920_breakout/chap8/Makefile b/csci4061/110920_breakout/chap8/Makefile new file mode 100644 index 0000000..bd92bec --- /dev/null +++ b/csci4061/110920_breakout/chap8/Makefile @@ -0,0 +1,12 @@ +pgm81: pgm_8_1.c + gcc pgm_8_1.c -lm -o out + ./out 5 + +pgm85: pgm_8_5.c + gcc pgm_8_5.c -lm -o out + ./out + +.PHONY: clean + +clean: + rm out 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 diff --git a/csci4061/110920_breakout/chap8/pgm_8_5.c b/csci4061/110920_breakout/chap8/pgm_8_5.c new file mode 100644 index 0000000..b20cdfa --- /dev/null +++ b/csci4061/110920_breakout/chap8/pgm_8_5.c @@ -0,0 +1,43 @@ +// Program 8.5 + +#include +#include +#include +#include + +static volatile sig_atomic_t doneflag = 0; + +/* ARGSUSED */ +static void setdoneflag(int signo) { + doneflag = 1; +} + +int main (void) { + struct sigaction act; + int count = 0; + double sum = 0; + double x; + + act.sa_handler = setdoneflag; /* set up signal handler */ + act.sa_flags = 0; + if ((sigemptyset(&act.sa_mask) == -1) || + (sigaction(SIGINT, &act, NULL) == -1)) { + perror("Failed to set SIGINT handler"); + return 1; + } + + while (!doneflag) { + x = (rand() + 0.5)/(RAND_MAX + 1.0); + sum += sin(x); + count++; + printf("Count is %d and average is %f\n", count, sum/count); + sleep(3); + } + + printf("Program terminating ...\n"); + if (count == 0) + printf("No values calculated yet\n"); + else + printf("Count is %d and average is %f\n", count, sum/count); + return 0; +} \ No newline at end of file diff --git a/csci4061/110920_breakout/sol1.c b/csci4061/110920_breakout/sol1.c new file mode 100644 index 0000000..416a46d --- /dev/null +++ b/csci4061/110920_breakout/sol1.c @@ -0,0 +1,37 @@ +/* +* Recitation Section Number: 9 +* Breakout Number: +* Member Name (X500) +* Member Name (X500) +* Member Name (X500) +* Member Name (X500) +*/ + +#include +#include +#include +#include + +void infinitePrint() { + + static int count = 0; + printf("%ld: Count = %d\n", time(NULL), ++count); + sleep(1); +} + +int main() { + + // ------------------sol1.c----------------- + // initialize new sigset - sigset_t, sigemptyset + sigset_t sigset; + sigemptyset(&sigset); + // add SIGINT to sigset - sigaddset + sigaddset(&sigset, SIGINT); + // block SIGINT - sigprocmask + sigprocmask(SIG_BLOCK, &sigset, NULL); + // Do not modify the while loop and infinitePrint() + // ----------------------------------------- + + /* Print infinitely. */ + while (1) infinitePrint(); +} \ No newline at end of file diff --git a/csci4061/110920_breakout/sol2.c b/csci4061/110920_breakout/sol2.c new file mode 100644 index 0000000..b5c4895 --- /dev/null +++ b/csci4061/110920_breakout/sol2.c @@ -0,0 +1,52 @@ +/* +* Recitation Section Number: 9 +* Breakout Number: +* Member Name (X500) +* Member Name (X500) +* Member Name (X500) +* Member Name (X500) +*/ + +#include +#include +#include +#include + +// Remember the usage of sig_atomic_t in the recitation example +static volatile sig_atomic_t doneflag = 0; + +static void setdoneflag(int signo) { + doneflag = doneflag ^ 1; +} + +void infinitePrint() { + + static int count = 0; + printf("%ld: Count = %d\n", time(NULL), ++count); + sleep(1); +} + +int main() { + + // ------------------sol2.c----------------- + // setup signal handler - sigaction struct, sigemptyset, + struct sigaction act; + sigset_t sigset; + // specify action associated with SIGNT - sigaction() + act.sa_handler = setdoneflag; /* set up signal handler */ + act.sa_flags = 0; + if ((sigemptyset(&act.sa_mask) == -1) || + (sigaction(SIGINT, &act, NULL) == -1)) + { + perror("Failed to set SIGINT handler"); + return 1; + } + // You are free to modify the while loop but not the infinitePrint() + // ----------------------------------------- + + /* Print infinitely. */ + while (1) { + if (!doneflag) + infinitePrint(); + } +} \ No newline at end of file -- cgit v1.2.3