Update OpenMP

OpenMP/parallelFor.c

+#include "omp.h"
+#include "stdlib.h"
+#include "stdio.h"
+
+void simpleParalleloop(int n, float *a, float *b, float *res)
+{
+    int index;
+#pragma omp parallel for num_threads(4)
+    for (index = 1; index < n; index++) /* index is private by default */
+    {
+        res[index] = (a[index] + b[index]);
+    }
+}
+
+void main(int count, char *arg[])
+{
+
+    int n = count > 1 ? atoi(arg[1]) : 10;
+    float a[n], b[n], res[n];
+
+    //set array a values
+    for (int i = 0; i < n; i++)
+    {
+        a[i] = i * i;
+        b[i] = i;
+    }
+
+    simpleParalleloop(n, a, b, res);
+
+    printf("\nThe Result Is: \r\n");
+    for (int i = 0; i < n; i++)
+        printf("%f, ", res[i]);
+
+    printf("\n");
+}
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OpenMP/raceCondition.c

@@ -6,24 +6,18 @@
 void start()
 {
     int x = 2;
-    #pragma omp parallel num_threads(20)
+    #pragma omp parallel num_threads(6)
     {
         int threadId = omp_get_thread_num();
 
-        if (threadId == 5)
+        if (threadId == 0)
             x = 5;
         else
             printf("I am Thread %d and for me x=%d \n", threadId, x);
-       #pragma omp barrier
-printf("After barrier => I'am thread %d and x=%d\n",threadId,x);
     }
-	
 }
 
-
-
-
 void main(int count, char *arg[])
 {
     start();
-}
+}
\ No newline at end of file

OpenMP/reduction.c

@@ -5,6 +5,10 @@
 //simple example to demonstrate race condition in parallel programs and barrier
 void start()
 {
+    #pragma omp parallel num_threads(12)
+    {
+        int threadId = omp_get_thread_num();
+
     int i=0, length = 10;
     int array[length];
     for(i = 0; i < length; i++)
@@ -18,11 +22,17 @@ void start()
             sum += array[index];
 
     //calculate average
-          avg = sum/(double)length;
+    #pragma omp barrier
+    #pragma omp single
+        {
+            avg = sum/(double)length;
             printf("Average is avg = %f\n", avg);
- }
+        }
+        
+    }
+}
 
 void main(int count, char *arg[])
 {
     start();
-}
+}
\ No newline at end of file

OpenMP/sync_Barrier_ordered.c

+#include <stdio.h>
+#include <omp.h>
+
+
+//simple example to demonstrate race condition in parallel programs and barrier
+void start()
+{
+    int x = 2;
+    #pragma omp parallel num_threads(6)
+    {
+        int threadId = omp_get_thread_num();
+
+        if (threadId == 0)
+            x = 5;
+        else
+            printf("I am Thread %d and for me x=%d \n", threadId, x);
+
+        #pragma omp barrier
+        {
+            #pragma ordered
+                printf("After Barrier => I am Thread %d and for me x=%d \n", threadId, x);
+
+            #pragma ordered
+                printf("After Order => I am Thread %d and for me x=%d \n", threadId, x);
+        }
+        
+    }
+}
+
+void main(int count, char *arg[])
+{
+    start();
+}
\ No newline at end of file

OpenMP/sync_lock.c

@@ -29,11 +29,11 @@ void start()
         }
         
 
+        omp_destroy_lock(&lock);
     }
-
 }
 
 void main(int count, char *arg[])
 {
     start();
-}
+}
\ No newline at end of file

OpenMP/waitCondition.c

+#include <omp.h>
+#include <stdio.h>
+
+void main(int count, char *arg[])
+{
+    int flag = 0;
+    #pragma omp parallel num_threads(3)
+    {
+        int threadId = omp_get_thread_num();
+
+        if (threadId == 0)
+        {
+        /* Set flag to release thread 1 */
+        #pragma omp atomic update
+            flag++;
+            /* Flush of flag is implied by the atomic directive */
+        }
+        else if (threadId == 1)
+        {
+        /* Loop until we see that flag reaches 1*/
+        #pragma omp flush(flag)
+            while (flag < 1)
+            {
+                #pragma omp flush(flag)
+            }
+            printf("Thread 1 awoken\n");
+        /* Set flag to release thread 2 */
+        #pragma omp atomic update
+            flag++;
+            /* Flush of flag is implied by the atomic directive */
+        }
+        else if (threadId == 2)
+        {
+        /* Loop until we see that flag reaches 2 */
+        #pragma omp flush(flag)
+            while (flag < 2)
+            {
+                #pragma omp flush(flag)
+            }
+            printf("Thread 2 awoken\n");
+        }
+    }
+}
\ No newline at end of file