Lay the groundwork

inc/graph.h

@@ -0,0 +1,57 @@
+
+// Gee, ain't pointers just the greatest?
+//? Rename to'graph'? Typedef to 'graph'?
+struct adjmatrix {
+   int num_processes;    // The number of processes in the matrix
+   int num_resources;    // The number of resources in the matrix
+   int *resource_counts; // The counts of each resource in the matrix
+   int **matrix;         // Tell me, Mr. Anderson, what good is a phone call if you are unable to speak?
+};
+
+/* graph_reduce:
+      Perform the graph reduction algorithm on the adjacency matrix to detect deadlocks
+      This algorithm is described in section 5.2 of the Zybook
+      (!THIS MODIFIES THE GRAPH!)
+   @params:
+      graph: adjacency matrix containing all relevant information about the graph
+   @returns:
+      int:
+         1 if graph is not reducible (deadlock)
+         0 if graph is reducible (no deadlock)
+*/
+int graph_reduce(struct adjmatrix *graph);
+
+/* knot_detect:
+      Perform the knot detection algorithm on the adjacency matrix to detect deadlocks
+      (!THIS MODIFIES THE GRAPH!)
+   @params:
+      graph: adjacency matrix containing all relevant information about the graph
+   @returns:
+      int:
+         1 if graph is knotted (deadlock)
+         0 if graph is not (no deadlock)
+*/
+int knot_detect(struct adjmatrix  *graph);
+
+/* create_adjmatrix:
+   Create a new adjmatrix (!THIS INVOLVES MEMORY ALLOCATION!) (Basically a constructor)
+   @params:
+      num_processes
+      num_resources
+   @returns:
+      struct adjmatrix:
+         Empty adjacency matrix of size (num_processes+num_resources)^2
+         Fill in the blanks yourself
+*/
+struct adjmatrix * create_adjmatrix(int num_processes, int num_resources);
+
+/* destroy_adjmatrix:
+   Destroy an adjmatrix (!THIS INVOLVES MEMORY DEALLOCATION!) (Basically a destructor)
+   @params:
+      matrix:
+         A structure containing all relevant information about the graph
+   @returns:
+      int:
+         0 if operation completed successfully, else a value of type `errno`
+*/
+int destroy_adjmatrix(struct adjmatrix *matrix);

inc/read_input.h

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+
+
+int read_file(char *filename, struct adjmatrix *graph);