Update mimalloc_arena.zig

1 files changed, 9 insertions, 0 deletions

diff --git a/src/mimalloc_arena.zig b/src/mimalloc_arena.zig
index db7a6c368..e2df152fb 100644
--- a/src/mimalloc_arena.zig
+++ b/src/mimalloc_arena.zig
@@ -23,10 +23,19 @@ pub const Arena = struct {
         mimalloc.mi_heap_destroy(this.heap);
     }
 
+    pub fn reset(this: *Arena) void {
+        this.deinit();
+        this.* = initAssumeCapacity();
+    }
+
     pub fn init() !Arena {
         return Arena{ .heap = mimalloc.mi_heap_new() orelse return error.OutOfMemory };
     }
 
+    pub fn initAssumeCapacity() Arena {
+        return Arena{ .heap = mimalloc.mi_heap_new().? };
+    }
+
     pub fn gc(this: Arena, force: bool) void {
         mimalloc.mi_heap_collect(this.heap, force);
     }