From: ian <ian@kremlin.cc>
Date: Thu, 30 Oct 2014 20:34:36 +0000 (-0400)
Subject: fix blocking call in signal handler, switch to CPU nanosecond time
X-Git-Url: https://uglyman.kremlin.cc/gitweb/gitweb.cgi?p=assignments.git;a=commitdiff_plain;h=4cb62617fbc1c9c9ad454c1b18a313ca5e7b744e

fix blocking call in signal handler, switch to CPU nanosecond time
---

diff --git a/assgn7/timer.c b/assgn7/timer.c
index 6d35ff5..c8fef98 100644
--- a/assgn7/timer.c
+++ b/assgn7/timer.c
@@ -10,31 +10,29 @@ int done;
 
 void handle_start() {
 
-	if(clock_gettime(CLOCK_MONOTONIC, start_time) == -1) {
+	if(clock_gettime(CLOCK_PROCESS_CPUTIME_ID, start_time) == -1) {
 
 		printf("failed to get start time.\n");
 		exit(1);
 	}
-
-	pause();
 }
 
 void handle_stop() {
 
 	long int start_sec, stop_sec, delta;
 
-	if(clock_gettime(CLOCK_MONOTONIC, stop_time) == -1) {
+	if(clock_gettime(CLOCK_PROCESS_CPUTIME_ID, stop_time) == -1) {
 
 		printf("failed to get stop time.\n");
 		exit(1);
 	}
 
-	start_sec = ((long int) start_time->tv_sec);
-	stop_sec  = ((long int) stop_time->tv_sec);
+	start_sec = ((long int) start_time->tv_nsec);
+	stop_sec  = ((long int) stop_time->tv_nsec);
 
 	delta = stop_sec - start_sec;
 
-	printf("%ld seconds elapsed between signals.\n", delta);
+	printf("%ld nanoseconds elapsed between signals.\n", delta);
 
 	done = 1;
 }
@@ -58,7 +56,7 @@ int main(int argc, char *argv[]) {
 	pause();
 
 	if(!done)
-		goto terminate_check;
+		goto terminate_check; /* sorry */
 
 	free(start_time);
 	free(stop_time);