Make variable names more accurate

Make functions more functional
Make comments more commentary

inc/globals.hpp

@@ -1,4 +1,10 @@
 #define N 8
+#define timescale 5
+
+//function defines, renaming wait and signal
+#define wait(x) sem_wait(&x)
+#define signal(x) sem_post(&x)
+
 // Shared memory through global variables
 // Create all of memory
 extern block memory[N];
@@ -7,6 +13,8 @@ extern list lists[3];
 extern list *freelist, *list1, *list2;
 
 // count semaphores
-extern sem_t semfl, seml1, seml2;
+extern sem_t sem_freelist, sem_list1, sem_list2;
 // binary semaphores
-extern sem_t mutfl, mutl1, mutl2;
+extern sem_t mut_freelist, mut_list1, mut_list2;
+// binary semaphores for reading/writing
+extern sem_t mut_take, mut_give;

inc/list.hpp

@@ -14,7 +14,7 @@ struct list {
 
 // list operations:
 //   list_unlink: unlinks the last block in the list, and returns a pointer to it
-block *list_unlink (list *l);
+block* list_unlink (list* l, bool lastblock=0);
 //   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