Paging and heap rewrite

VESA drawing causes a Page fault because it tries to use a pointer to the framebuffer which was created before the paging has been initialized. If the resolution is set after the paging has been initialized the CPU throws a triple fault because the int32 call can not happen with paging turned on. To be fixed soon!

1 files changed, 66 insertions, 0 deletions

diff --git a/src/kernel/paging/ordered_array.h b/src/kernel/paging/ordered_array.h
new file mode 100644
index 0000000..223ea14
--- /dev/null
+++ b/src/kernel/paging/ordered_array.h
@@ -0,0 +1,66 @@
+#ifndef MELVIX_ORDERED_ARRAY_H
+#define MELVIX_ORDERED_ARRAY_H
+
+#include <stdint.h>
+
+/**
+ * The array can store anything - so a void pointer is used
+ */
+typedef void *type_t;
+
+typedef char (*lessthan_predicate_t)(type_t, type_t);
+
+typedef struct {
+    type_t *array;
+    uint32_t size;
+    uint32_t max_size;
+    lessthan_predicate_t less_than;
+} ordered_array_t;
+
+/**
+ * A standard less-than predicate
+ * @param a The first parameter
+ * @param b The second parameter
+ * @return Non-zero if the first parameter is bigger than the second
+ */
+char standard_lessthan_predicate(type_t a, type_t b);
+
+/**
+ * Create an ordered array
+ * @param max_size Maximal size
+ * @param less_than The less-than predicate
+ * @return The newly created array
+ */
+ordered_array_t create_ordered_array(uint32_t max_size, lessthan_predicate_t less_than);
+
+ordered_array_t place_ordered_array(void *addr, uint32_t max_size, lessthan_predicate_t less_than);
+
+/**
+ * Destroy an ordered array
+ * @param array The ordered array
+ */
+void destroy_ordered_array(ordered_array_t *array);
+
+/**
+ * Add an item into the array
+ * @param item The item
+ * @param array The array
+ */
+void insert_ordered_array(type_t item, ordered_array_t *array);
+
+/**
+ * Lookup the item at a specific index
+ * @param i The index
+ * @param array The array
+ * @return
+ */
+type_t lookup_ordered_array(uint32_t i, ordered_array_t *array);
+
+/**
+ * Delete an item at an index from an array
+ * @param i The index
+ * @param array The array
+ */
+void remove_ordered_array(uint32_t i, ordered_array_t *array);
+
+#endif