1 files changed, 25 insertions, 0 deletions
diff --git a/Modules/_winapi.c b/Modules/_winapi.c
index 9b30a90032..f6bb07fd8b 100644
--- a/Modules/_winapi.c
+++ b/Modules/_winapi.c
@@ -1403,6 +1403,30 @@ _winapi_MapViewOfFile_impl(PyObject *module, HANDLE file_map,
 }
 
 /*[clinic input]
+_winapi.UnmapViewOfFile
+
+    address: LPCVOID
+    /
+[clinic start generated code]*/
+
+static PyObject *
+_winapi_UnmapViewOfFile_impl(PyObject *module, LPCVOID address)
+/*[clinic end generated code: output=4f7e18ac75d19744 input=8c4b6119ad9288a3]*/
+{
+    BOOL success;
+
+    Py_BEGIN_ALLOW_THREADS
+    success = UnmapViewOfFile(address);
+    Py_END_ALLOW_THREADS
+
+    if (!success) {
+        return PyErr_SetFromWindowsErr(0);
+    }
+
+    Py_RETURN_NONE;
+}
+
+/*[clinic input]
 _winapi.OpenFileMapping -> HANDLE
 
     desired_access: DWORD
@@ -2095,6 +2119,7 @@ static PyMethodDef winapi_functions[] = {
     _WINAPI_READFILE_METHODDEF
     _WINAPI_SETNAMEDPIPEHANDLESTATE_METHODDEF
     _WINAPI_TERMINATEPROCESS_METHODDEF
+    _WINAPI_UNMAPVIEWOFFILE_METHODDEF
     _WINAPI_VIRTUALQUERYSIZE_METHODDEF
     _WINAPI_WAITNAMEDPIPE_METHODDEF
     _WINAPI_WAITFORMULTIPLEOBJECTS_METHODDEF