Minor changes to os2

core/os/os2/file_windows.odin

@@ -1,10 +1,11 @@
 //+private
 package os2
 
+import "base:runtime"
+
 import "core:io"
 import "core:mem"
 import "core:sync"
-import "base:runtime"
 import "core:strings"
 import "core:time"
 import "core:unicode/utf16"
@@ -20,11 +21,45 @@ _file_allocator :: proc() -> runtime.Allocator {
 	return heap_allocator()
 }
 
+_temp_allocator_proc :: runtime.arena_allocator_proc
+
+@(private="file", thread_local)
+_global_default_temp_allocator_arena: runtime.Arena
+
 _temp_allocator :: proc() -> runtime.Allocator {
-	// TODO(bill): make this not depend on the context allocator
-	return context.temp_allocator
+	return runtime.Allocator{
+		procedure = _temp_allocator_proc,
+		data      = &_global_default_temp_allocator_arena,
+	}
 }
 
+@(require_results)
+_temp_allocator_temp_begin :: proc(loc := #caller_location) -> (temp: runtime.Arena_Temp) {
+	temp = runtime.arena_temp_begin(&_global_default_temp_allocator_arena, loc)
+	return
+}
+
+_temp_allocator_temp_end :: proc(temp: runtime.Arena_Temp, loc := #caller_location) {
+	runtime.arena_temp_end(temp, loc)
+}
+
+@(fini, private)
+_destroy_temp_allocator_fini :: proc() {
+	runtime.arena_destroy(&_global_default_temp_allocator_arena)
+	_global_default_temp_allocator_arena = {}
+}
+
+@(deferred_out=_temp_allocator_temp_end)
+_TEMP_ALLOCATOR_GUARD :: #force_inline proc(ignore := false, loc := #caller_location) -> (runtime.Arena_Temp, runtime.Source_Code_Location) {
+	if ignore {
+		return {}, loc
+	} else {
+		return _temp_allocator_temp_begin(loc), loc
+	}
+}
+
+
+
 
 _File_Kind :: enum u8 {
 	File,
@@ -546,6 +581,9 @@ _normalize_link_path :: proc(p: []u16, allocator: runtime.Allocator) -> (str: st
 	if n == 0 {
 		return "", _get_platform_error()
 	}
+
+	_TEMP_ALLOCATOR_GUARD()
+
 	buf := make([]u16, n+1, _temp_allocator())
 	n = win32.GetFinalPathNameByHandleW(handle, raw_data(buf), u32(len(buf)), win32.VOLUME_NAME_DOS)
 	if n == 0 {