hybrid/demos: added task-dep.c demo

hybrid/demos/task-dep.c

@@ -0,0 +1,32 @@
+
+#include <stdio.h>
+#include <omp.h>
+#include <unistd.h>
+
+
+int main(int argc, char *argv[])
+{
+
+  int data = 1;
+  #pragma omp parallel
+  #pragma omp single
+  {
+    for(int i=0;i<5; i++)
+    {
+      #pragma omp task depend(in: data) // in: depend on all previous out/inout tasks
+      {
+        printf("task A %d\n", i);
+        sleep(1);
+      }
+      #pragma omp task depend(inout: data) // inout: depend on all previous in/inout/out tasks
+      {
+        printf("task B %d\n", i);
+      }
+    }
+    #pragma omp task depend(out: data) // out: depend on all previous in/inout/out tasks (same as out)
+    {
+      printf("task C\n");
+    }
+  }
+  return 0;
+}