cleanup: generalisation

1 files changed, 41 insertions, 0 deletions

diff --git a/source/base/base_arena.h b/source/base/base_arena.h
new file mode 100755
index 0000000..71d9e69
--- /dev/null
+++ b/source/base/base_arena.h
@@ -0,0 +1,41 @@
+#ifndef ARENA_H
+#define ARENA_H
+
+#define Align(pointer, alignment) align((u64)(pointer), (umm)(alignment))
+#define PushStruct(arena, type) (type *)arena_alloc((arena), sizeof(type))
+#define PushArray(arena, type, len) (type *)arena_alloc((arena), sizeof(type) * (len))
+#define PushString(arena, len) (s8 *)arena_alloc((arena), sizeof(s8)*len))
+
+typedef struct mem_arena  mem_arena;
+typedef struct temp_arena temp_arena;
+
+struct mem_arena
+{
+    u64 current_position;
+    u64 previous_position;
+    u64 capacity;
+    u8 *base_position;
+};
+
+struct temp_arena
+{
+    mem_arena *arena;
+    u64        start_position;
+};
+
+internal mem_arena *
+arena_resize_align(
+                   mem_arena *arena,
+                   void      *old_memory,
+                   u64        new_size,
+                   u64        old_size,
+                   umm        alignment);
+
+internal mem_arena *
+arena_resize(
+             mem_arena *arena,
+             void      *old_memory,
+             u64        new_size,
+             u64        old_size);
+
+#endif