Step 4: timer

makefile

@@ -1,4 +1,4 @@
-all: MyCopy ForkCopy PipeCopy
+all: MyCopy ForkCopy PipeCopy timer
 clear:
 	rm *.o
 MyCopy: MyCopy.o
@@ -13,3 +13,7 @@ PipeCopy: PipeCopy.o
 	g++ PipeCopy.o -o PipeCopy
 PipeCopy.o:
 	g++ -c PipeCopy.c
+timer: timer.o
+	g++ timer.o -o timer
+timer.o:
+	g++ -c timer.c

timer.c

@@ -0,0 +1,45 @@
+#include "cse356header.h" 
+
+main(int argc, char *argv[])
+{
+	pid_t forkpid;
+
+	timeval start, stop;
+
+	forkpid = fork();
+
+	gettimeofday(&start, NULL);
+	if(forkpid == 0) {
+		execl("./MyCopy", "MyCopy", argv[1], argv[2], NULL);
+		exit(0);
+	}
+	wait(NULL);
+	gettimeofday(&stop, NULL);
+	printf("MyCopy took %lu\n", stop.tv_usec - start.tv_usec);
+
+
+	forkpid = fork();
+
+	gettimeofday(&start, NULL);
+	if(forkpid == 0) {
+		execl("./ForkCopy", "ForkCopy", argv[1], argv[2], NULL);
+		exit(0);
+	}
+	wait(NULL);
+	gettimeofday(&stop, NULL);
+	printf("ForkCopy took %lu\n", stop.tv_usec - start.tv_usec);
+
+
+	forkpid = fork();
+
+	gettimeofday(&start, NULL);
+	if(forkpid == 0) {
+		execl("./PipeCopy", "PipeCopy", argv[1], argv[2], NULL);
+		exit(0);
+	}
+	wait(NULL);
+	gettimeofday(&stop, NULL);
+	printf("PipeCopy took %lu\n", stop.tv_usec - start.tv_usec);
+
+	exit(0);
+}