final code

hw_files/pease-hw3.c

@@ -1,13 +1,14 @@
 // HW3 - COS331
 // Pease
 
-#include <stdlib.h>
-#include <pthread.h> 
-#include <unistd.h> 
 #include <fcntl.h> 
+#include <pthread.h> 
 #include <semaphore.h> 
-#include <sys/stat.h> 
 #include <stdio.h>
+#include <stdlib.h>
+#include <sys/stat.h> 
+#include <sys/time.h>
+#include <unistd.h> 
 
 // Globals
 unsigned int seed = 8;
@@ -58,6 +59,10 @@ void *countNumsAndStore(void * arguments) {
 
 // Thread Launcher
 void startThreadOutput(int threadCount) {
+    // Get the start time
+    struct timeval startTime, endTime;
+    gettimeofday(&startTime,NULL);
+
     // Array of thread ID's
     pthread_t threadIds[threadCount];
 
@@ -106,7 +111,6 @@ void startThreadOutput(int threadCount) {
         }
         printf("\n");
     }
-    printf("\n");
 
     if (modeFlag == 1) {
         sem_close(one_semaphore);
@@ -119,6 +123,11 @@ void startThreadOutput(int threadCount) {
             sem_unlink(semName);
         }
     }
+    // Get end time
+    gettimeofday(&endTime,NULL);
+    // Print out the time
+    float difference = ((endTime.tv_sec * 1000000 + endTime.tv_usec) - (startTime.tv_sec * 1000000 + startTime.tv_usec)) * 0.000001;
+    printf("Duration: %f seconds\n\n", difference);
 }
 
 // main
@@ -133,12 +142,11 @@ int main(int argc, char *argv[])
             random_array[i][j] = rand() % 256;
         }
     }
-
-    // startThreadOutput(threadCount); // modeFlag already set to 0 for no semaphore
-    // modeFlag = 1; // Set modeFlag to 1 for semaphore usage
-    // startThreadOutput(threadCount);
+    
+    startThreadOutput(threadCount); // modeFlag already set to 0 for no semaphore
+    modeFlag = 1; // Set modeFlag to 1 for semaphore usage
+    startThreadOutput(threadCount);
     modeFlag = 2; // Set modeFlag to 2 for 256 semaphores
     startThreadOutput(threadCount);
-
     return 0;
 }