From cd78fa1af1288c47c6d990a92b0d9373c7fb18c3 Mon Sep 17 00:00:00 2001
From: Juan Gomez Mosquera <atilag@gmail.com>
Date: Thu, 24 Oct 2024 20:20:29 -0400
Subject: [PATCH] Adding runtime typechecking to SharedMemory::_from_raw

---
 wasmtime/_sharedmemory.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/wasmtime/_sharedmemory.py b/wasmtime/_sharedmemory.py
index f04b772..23e06f8 100644
--- a/wasmtime/_sharedmemory.py
+++ b/wasmtime/_sharedmemory.py
@@ -21,6 +21,9 @@ def __init__(self, engine: Engine, ty: MemoryType):
 
     @classmethod
     def _from_raw(cls, sharedmemory: ffi.wasmtime_sharedmemory_t) -> "SharedMemory":
+        if not isinstance(sharedmemory, ffi.wasmtime_sharedmemory_t):
+            raise TypeError("wrong shared memory pointer type provided to _from_raw")
+        
         ty: "SharedMemory" = cls.__new__(cls)
         ty._set_ptr(sharedmemory)
         return ty