Implemented page allocator in C; removed C++.

src/pageallocator.c

@@ -0,0 +1,30 @@
+#include "pageallocator.h"
+#include "types/status.h"
+
+physaddr_t reserve_page(struct page_stack_t *stack)
+{
+    if(stack->stack_pointer < stack->base_pointer)
+    {
+        physaddr_t frame = *stack->stack_pointer;
+        *stack->stack_pointer = (physaddr_t) 0;
+        stack->stack_pointer++;
+        return frame;
+    }
+    return S_OUT_OF_MEMORY;
+}
+
+int free_page(struct page_stack_t *stack, physaddr_t location)
+{
+    if(stack->stack_pointer > stack->limit_pointer)
+    {
+        stack->stack_pointer--;
+        *stack->stack_pointer = location;
+        return S_OK;
+    }
+    return S_OUT_OF_MEMORY;
+}
+
+size_t free_page_count(struct page_stack_t *stack)
+{
+    return stack->base_pointer - stack->stack_pointer;
+}