Implement prerequisites

inc/consumer.hpp

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+
+void consumer ();

inc/globals.hpp

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+#define N 8
+// Shared memory through global variables
+// Create all of memory
+extern block memory[N];
+// create the three lists
+extern list lists[3];
+extern list *freelist, *list1, *list2;

inc/list.hpp

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+
+struct block {
+   block *prev;
+   block *next;
+   // data goes here
+   int data;
+};
+
+struct list {
+   block *start;
+   block *end;
+   int length;
+};
+
+// list operations:
+//   list_unlink: unlinks the last block in the list, and returns a pointer to it
+block *list_unlink (list *l);
+//   list_link:   links the block b onto the end of the list
+void   list_link   (list *l, block *b);
+//   list_init:   links an array of blocks onto the end of a list
+void   list_init   (list *l, block *m, int size);
+//   list_print:  prints a list
+void   list_print  (list *l);
+void   list_concise(list *l);

inc/producer.hpp

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+
+void producer ();

inc/transformer.hpp

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+
+void transformer ();