From 3d9328fd79f45c85f1ecc513b2c05071f9c1d1a3 Mon Sep 17 00:00:00 2001
From: gingerBill <bill@gingerbill.org>
Date: Mon, 26 Jun 2023 15:55:52 +0100
Subject: Default to `panic` allocator for wasm targets

---
 core/runtime/default_allocators_nil.odin | 50 +++++++++++++++++++++++++++++++-
 1 file changed, 49 insertions(+), 1 deletion(-)

(limited to 'core/runtime/default_allocators_nil.odin')

diff --git a/core/runtime/default_allocators_nil.odin b/core/runtime/default_allocators_nil.odin
index f86990581..a340050eb 100644
--- a/core/runtime/default_allocators_nil.odin
+++ b/core/runtime/default_allocators_nil.odin
@@ -35,4 +35,52 @@ nil_allocator :: proc() -> Allocator {
 when ODIN_OS == .Freestanding {
 	default_allocator_proc :: nil_allocator_proc
 	default_allocator :: nil_allocator
-} 
\ No newline at end of file
+} 
+
+
+
+panic_allocator_proc :: proc(allocator_data: rawptr, mode: Allocator_Mode,
+                             size, alignment: int,
+                             old_memory: rawptr, old_size: int, loc := #caller_location) -> ([]byte, Allocator_Error) {
+	switch mode {
+	case .Alloc:
+		if size > 0 {
+			panic("panic allocator, .Alloc called", loc=loc)
+		}
+	case .Alloc_Non_Zeroed:
+		if size > 0 {
+			panic("panic allocator, .Alloc_Non_Zeroed called", loc=loc)
+		}
+	case .Resize:
+		if size > 0 {
+			panic("panic allocator, .Resize called", loc=loc)
+		}
+	case .Free:
+		if old_memory != nil {
+			panic("panic allocator, .Free called", loc=loc)
+		}
+	case .Free_All:
+		panic("panic allocator, .Free_All called", loc=loc)
+
+	case .Query_Features:
+		set := (^Allocator_Mode_Set)(old_memory)
+		if set != nil {
+			set^ = {.Query_Features}
+		}
+		return nil, nil
+
+	case .Query_Info:
+		panic("panic allocator, .Query_Info called", loc=loc)
+	}
+
+	return nil, nil
+}
+
+panic_allocator :: proc() -> Allocator {
+	return Allocator{
+		procedure = nil_allocator_proc,
+		data = nil,
+	}
+}
+
+
-- 
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