Differences

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--- boundedbuffer [2007/09/24 19:50] – niloo59
+++ boundedbuffer [2007/09/25 05:20] (current) – nshafiei
@@ Line 216: / Line 216: @@
   int i,j, data;
   in("head",?i);
+  rd("tail",?j);
+  #wait when the buffer is empty
+  while (i==j) rd("tail",?j);
   in("buffer",i,?data);
   i=(i+1)%BUFFERSIZE;
@@ Line 227: / Line 230: @@
   in("tail",?j);
   rd("head",?i);
-  #loop when the buffer is full
+  #wait when the buffer is full
   while ( j-i==BUFFERSIZE-1 || i-j==1 ) rd("head",?i);
   j=(j+1)%BUFFERSIZE;
@@ Line 270: / Line 273: @@
 </code>
+<code c>
+// i1 and i2 are initialized to 0
+void put(int data)
+{
+      int i1, i2;
+      read("consumer", ?i2);
+      in("producer",?i1);
+      if(i1==size)i1=0;
+      while(i1+1==i2 || (i1+1==size && i2==0))
+         read("consumer",?i2);
+      out("data", data, i1);
+      out("producer", i1+1);
+}
+int get()
+{
+      int i2, data;
+      in("consumer",?i2);
+      if(i2==size)i2=0;
+      in("data",?data,i2);
+      out("consumer", i2+1);
+      return data;
+}
+</code>