From 9fa0a7f1da1b70bee995f53c6c96c43189018772 Mon Sep 17 00:00:00 2001
From: mrb0nk500 <b0nk@b0nk.xyz>
Date: Wed, 1 Feb 2023 18:45:02 -0400
Subject: global: Import Dolphin SDK

This version comes from the Metroid Prime decompilation project.
https://github.com/PrimeDecomp/prime
---
 src/Dolphin/os/OSArena.c | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 src/Dolphin/os/OSArena.c

(limited to 'src/Dolphin/os/OSArena.c')

diff --git a/src/Dolphin/os/OSArena.c b/src/Dolphin/os/OSArena.c
new file mode 100644
index 0000000..da864ab
--- /dev/null
+++ b/src/Dolphin/os/OSArena.c
@@ -0,0 +1,39 @@
+#include <dolphin/os/OSArena.h>
+
+#define ROUND(n, a) (((u32)(n) + (a)-1) & ~((a)-1))
+#define TRUNC(n, a) (((u32)(n)) & ~((a)-1))
+
+void* __OSArenaHi;
+void* __OSArenaLo = (void*)-1;
+
+void* OSGetArenaHi(void) { return __OSArenaHi; }
+
+void* OSGetArenaLo(void) { return __OSArenaLo; }
+
+void OSSetArenaHi(void* addr) { __OSArenaHi = addr; }
+
+void OSSetArenaLo(void* addr) { __OSArenaLo = addr; }
+
+void* OSAllocFromArenaLo(u32 size, u32 align) {
+  void* ptr;
+  u8* arenaLo;
+
+  ptr = OSGetArenaLo();
+  arenaLo = ptr = (void*)ROUND(ptr, align);
+  arenaLo += size;
+  arenaLo = (u8*)ROUND(arenaLo, align);
+  OSSetArenaLo(arenaLo);
+  return ptr;
+}
+
+void* OSAllocFromArenaHi(u32 size, u32 align) {
+  void* ptr;
+  u8* arenaHi;
+
+  arenaHi = OSGetArenaHi();
+  arenaHi = (u8*)TRUNC(arenaHi, align);
+  arenaHi -= size;
+  arenaHi = ptr = (void*)TRUNC(arenaHi, align);
+  OSSetArenaHi(arenaHi);
+  return ptr;
+}
-- 
cgit v1.2.3-13-gbd6f