Merge pull request #3336 from davidhewitt/3.12-ffi

Update some FFI definitions for Python 3.12

newsfragments/3336.added.md

@@ -0,0 +1 @@
+Add FFI symbol `Py_GETENV`.

newsfragments/3336.changed.md

@@ -0,0 +1 @@
+Deprecate FFI definitions which are deprecated in Python 3.12.

pyo3-ffi-check/macro/src/lib.rs

@@ -152,6 +152,10 @@ pub fn for_all_fields(input: proc_macro::TokenStream) -> proc_macro::TokenStream
             // PyObject since 3.12 implements ob_refcnt as a union; bindgen creates
             // an anonymous name for the field
             Ident::new("__bindgen_anon_1", Span::call_site())
+        } else if struct_name == "PyMemberDef" && field_name == "type_code" {
+            // the field name in the C API is `type`, but that's a keyword in Rust
+            // so PyO3 picked type_code, bindgen picked type_
+            Ident::new("type_", Span::call_site())
         } else {
             field_ident.clone()
         };

pyo3-ffi-check/wrapper.h

@@ -1,3 +1,4 @@
 #include "Python.h"
 #include "datetime.h"
 #include "frameobject.h"
+#include "structmember.h"

pyo3-ffi/src/cpython/object.rs

@@ -1,7 +1,6 @@
-use crate::object;
 #[cfg(Py_3_8)]
 use crate::vectorcallfunc;
-use crate::{PyObject, Py_ssize_t};
+use crate::{object, PyGetSetDef, PyMemberDef, PyMethodDef, PyObject, Py_ssize_t};
 use std::mem;
 use std::os::raw::{c_char, c_int, c_uint, c_ulong, c_void};
 
@@ -247,9 +246,9 @@ pub struct PyTypeObject {
     pub tp_weaklistoffset: Py_ssize_t,
     pub tp_iter: Option<object::getiterfunc>,
     pub tp_iternext: Option<object::iternextfunc>,
-    pub tp_methods: *mut crate::methodobject::PyMethodDef,
-    pub tp_members: *mut crate::structmember::PyMemberDef,
-    pub tp_getset: *mut crate::descrobject::PyGetSetDef,
+    pub tp_methods: *mut PyMethodDef,
+    pub tp_members: *mut PyMemberDef,
+    pub tp_getset: *mut PyGetSetDef,
     pub tp_base: *mut PyTypeObject,
     pub tp_dict: *mut object::PyObject,
     pub tp_descr_get: Option<object::descrgetfunc>,
@@ -327,12 +326,10 @@ impl Default for PyHeapTypeObject {
 }
 
 #[inline]
-pub unsafe fn PyHeapType_GET_MEMBERS(
-    etype: *mut PyHeapTypeObject,
-) -> *mut crate::structmember::PyMemberDef {
+pub unsafe fn PyHeapType_GET_MEMBERS(etype: *mut PyHeapTypeObject) -> *mut PyMemberDef {
     let py_type = object::Py_TYPE(etype as *mut object::PyObject);
     let ptr = etype.offset((*py_type).tp_basicsize);
-    ptr as *mut crate::structmember::PyMemberDef
+    ptr as *mut PyMemberDef
 }
 
 // skipped _PyType_Name

pyo3-ffi/src/cpython/pydebug.rs

@@ -1,37 +1,72 @@
-use std::os::raw::c_int;
+use std::os::raw::{c_char, c_int};
 
 #[cfg(not(Py_LIMITED_API))]
 #[cfg_attr(windows, link(name = "pythonXY"))]
 extern "C" {
+    #[deprecated(note = "Python 3.12")]
     #[cfg_attr(PyPy, link_name = "PyPy_DebugFlag")]
     pub static mut Py_DebugFlag: c_int;
+    #[deprecated(note = "Python 3.12")]
     #[cfg_attr(PyPy, link_name = "PyPy_VerboseFlag")]
     pub static mut Py_VerboseFlag: c_int;
+    #[deprecated(note = "Python 3.12")]
     pub static mut Py_QuietFlag: c_int;
+    #[deprecated(note = "Python 3.12")]
     #[cfg_attr(PyPy, link_name = "PyPy_InteractiveFlag")]
     pub static mut Py_InteractiveFlag: c_int;
+    #[deprecated(note = "Python 3.12")]
     #[cfg_attr(PyPy, link_name = "PyPy_InspectFlag")]
     pub static mut Py_InspectFlag: c_int;
+    #[deprecated(note = "Python 3.12")]
     #[cfg_attr(PyPy, link_name = "PyPy_OptimizeFlag")]
     pub static mut Py_OptimizeFlag: c_int;
+    #[deprecated(note = "Python 3.12")]
     #[cfg_attr(PyPy, link_name = "PyPy_NoSiteFlag")]
     pub static mut Py_NoSiteFlag: c_int;
+    #[deprecated(note = "Python 3.12")]
     #[cfg_attr(PyPy, link_name = "PyPy_BytesWarningFlag")]
     pub static mut Py_BytesWarningFlag: c_int;
+    #[deprecated(note = "Python 3.12")]
     #[cfg_attr(PyPy, link_name = "PyPy_UseClassExceptionsFlag")]
     pub static mut Py_UseClassExceptionsFlag: c_int;
+    #[deprecated(note = "Python 3.12")]
     #[cfg_attr(PyPy, link_name = "PyPy_FrozenFlag")]
     pub static mut Py_FrozenFlag: c_int;
+    #[deprecated(note = "Python 3.12")]
     #[cfg_attr(PyPy, link_name = "PyPy_IgnoreEnvironmentFlag")]
     pub static mut Py_IgnoreEnvironmentFlag: c_int;
+    #[deprecated(note = "Python 3.12")]
     #[cfg_attr(PyPy, link_name = "PyPy_DontWriteBytecodeFlag")]
     pub static mut Py_DontWriteBytecodeFlag: c_int;
+    #[deprecated(note = "Python 3.12")]
     #[cfg_attr(PyPy, link_name = "PyPy_NoUserSiteDirectory")]
     pub static mut Py_NoUserSiteDirectory: c_int;
+    #[deprecated(note = "Python 3.12")]
     pub static mut Py_UnbufferedStdioFlag: c_int;
     #[cfg_attr(PyPy, link_name = "PyPy_HashRandomizationFlag")]
     pub static mut Py_HashRandomizationFlag: c_int;
+    #[deprecated(note = "Python 3.12")]
     pub static mut Py_IsolatedFlag: c_int;
     #[cfg(windows)]
+    #[deprecated(note = "Python 3.12")]
+    pub static mut Py_LegacyWindowsFSEncodingFlag: c_int;
+    #[cfg(windows)]
+    #[deprecated(note = "Python 3.12")]
     pub static mut Py_LegacyWindowsStdioFlag: c_int;
 }
+
+extern "C" {
+    #[cfg(Py_3_11)]
+    pub fn Py_GETENV(name: *const c_char) -> *mut c_char;
+}
+
+#[cfg(not(Py_3_11))]
+#[inline(always)]
+pub unsafe fn Py_GETENV(name: *const c_char) -> *mut c_char {
+    #[allow(deprecated)]
+    if Py_IgnoreEnvironmentFlag != 0 {
+        std::ptr::null_mut()
+    } else {
+        libc::getenv(name)
+    }
+}

pyo3-ffi/src/descrobject.rs

@@ -1,6 +1,6 @@
 use crate::methodobject::PyMethodDef;
 use crate::object::{PyObject, PyTypeObject};
-use crate::structmember::PyMemberDef;
+use crate::Py_ssize_t;
 use std::os::raw::{c_char, c_int, c_void};
 use std::ptr;
 
@@ -62,3 +62,62 @@ extern "C" {
     pub fn PyDictProxy_New(arg1: *mut PyObject) -> *mut PyObject;
     pub fn PyWrapper_New(arg1: *mut PyObject, arg2: *mut PyObject) -> *mut PyObject;
 }
+
+#[repr(C)]
+#[derive(Copy, Clone, Eq, PartialEq)]
+pub struct PyMemberDef {
+    pub name: *const c_char,
+    pub type_code: c_int,
+    pub offset: Py_ssize_t,
+    pub flags: c_int,
+    pub doc: *const c_char,
+}
+
+impl Default for PyMemberDef {
+    fn default() -> PyMemberDef {
+        PyMemberDef {
+            name: ptr::null_mut(),
+            type_code: 0,
+            offset: 0,
+            flags: 0,
+            doc: ptr::null_mut(),
+        }
+    }
+}
+
+/* Types */
+pub const Py_T_SHORT: c_int = 0;
+pub const Py_T_INT: c_int = 1;
+pub const Py_T_LONG: c_int = 2;
+pub const Py_T_FLOAT: c_int = 3;
+pub const Py_T_DOUBLE: c_int = 4;
+pub const Py_T_STRING: c_int = 5;
+#[deprecated(note = "Use Py_T_OBJECT_EX instead")]
+pub const _Py_T_OBJECT: c_int = 6;
+pub const Py_T_CHAR: c_int = 7;
+pub const Py_T_BYTE: c_int = 8;
+pub const Py_T_UBYTE: c_int = 9;
+pub const Py_T_USHORT: c_int = 10;
+pub const Py_T_UINT: c_int = 11;
+pub const Py_T_ULONG: c_int = 12;
+pub const Py_T_STRING_INPLACE: c_int = 13;
+pub const Py_T_BOOL: c_int = 14;
+pub const Py_T_OBJECT_EX: c_int = 16;
+pub const Py_T_LONGLONG: c_int = 17;
+pub const Py_T_ULONGLONG: c_int = 18;
+pub const Py_T_PYSSIZET: c_int = 19;
+#[deprecated(note = "Value is always none")]
+pub const _Py_T_NONE: c_int = 20;
+
+/* Flags */
+pub const Py_READONLY: c_int = 1;
+#[cfg(Py_3_10)]
+pub const Py_AUDIT_READ: c_int = 2; // Added in 3.10, harmless no-op before that
+#[deprecated]
+pub const _Py_WRITE_RESTRICTED: c_int = 4; // Deprecated, no-op. Do not reuse the value.
+pub const Py_RELATIVE_OFFSET: c_int = 8;
+
+extern "C" {
+    pub fn PyMember_GetOne(addr: *const c_char, l: *mut PyMemberDef) -> *mut PyObject;
+    pub fn PyMember_SetOne(addr: *mut c_char, l: *mut PyMemberDef, value: *mut PyObject) -> c_int;
+}

pyo3-ffi/src/fileobject.rs

@@ -26,10 +26,13 @@ extern "C" {
 
 #[cfg_attr(windows, link(name = "pythonXY"))]
 extern "C" {
+    #[deprecated(note = "Python 3.12")]
     pub static mut Py_FileSystemDefaultEncoding: *const c_char;
+    #[deprecated(note = "Python 3.12")]
     pub static mut Py_FileSystemDefaultEncodeErrors: *const c_char;
+    #[deprecated(note = "Python 3.12")]
     pub static mut Py_HasFileSystemDefaultEncoding: c_int;
-    // skipped Python 3.7 / ex-non-limited Py_UTF8Mode
+    // skipped 3.12-deprecated Py_UTF8Mode
 }
 
 // skipped _PyIsSelectable_fd

pyo3-ffi/src/lib.rs

@@ -407,6 +407,7 @@ mod warnings;
 mod weakrefobject;
 
 // Additional headers that are not exported by Python.h
+#[deprecated(note = "Python 3.12")]
 pub mod structmember;
 
 // "Limited API" definitions matching Python's `include/cpython` directory.

pyo3-ffi/src/structmember.rs

@@ -1,70 +1,33 @@
-use crate::object::PyObject;
-use crate::pyport::Py_ssize_t;
-use std::os::raw::{c_char, c_int};
-use std::ptr;
+use std::os::raw::c_int;
 
-#[repr(C)]
-#[derive(Copy, Clone, Eq, PartialEq)]
-pub struct PyMemberDef {
-    pub name: *const c_char,
-    pub type_code: c_int,
-    pub offset: Py_ssize_t,
-    pub flags: c_int,
-    pub doc: *const c_char,
-}
+pub use crate::PyMemberDef;
 
-impl Default for PyMemberDef {
-    fn default() -> PyMemberDef {
-        PyMemberDef {
-            name: ptr::null_mut(),
-            type_code: 0,
-            offset: 0,
-            flags: 0,
-            doc: ptr::null_mut(),
-        }
-    }
-}
+pub use crate::Py_T_BOOL as T_BOOL;
+pub use crate::Py_T_BYTE as T_BYTE;
+pub use crate::Py_T_CHAR as T_CHAR;
+pub use crate::Py_T_DOUBLE as T_DOUBLE;
+pub use crate::Py_T_FLOAT as T_FLOAT;
+pub use crate::Py_T_INT as T_INT;
+pub use crate::Py_T_LONG as T_LONG;
+pub use crate::Py_T_LONGLONG as T_LONGLONG;
+pub use crate::Py_T_OBJECT_EX as T_OBJECT_EX;
+pub use crate::Py_T_SHORT as T_SHORT;
+pub use crate::Py_T_STRING as T_STRING;
+pub use crate::Py_T_STRING_INPLACE as T_STRING_INPLACE;
+pub use crate::Py_T_UBYTE as T_UBYTE;
+pub use crate::Py_T_UINT as T_UINT;
+pub use crate::Py_T_ULONG as T_ULONG;
+pub use crate::Py_T_ULONGLONG as T_ULONGLONG;
+pub use crate::Py_T_USHORT as T_USHORT;
+#[allow(deprecated)]
+pub use crate::_Py_T_OBJECT as T_OBJECT;
 
-/* Types */
-pub const T_SHORT: c_int = 0;
-pub const T_INT: c_int = 1;
-pub const T_LONG: c_int = 2;
-pub const T_FLOAT: c_int = 3;
-pub const T_DOUBLE: c_int = 4;
-pub const T_STRING: c_int = 5;
-pub const T_OBJECT: c_int = 6;
-/* XXX the ordering here is weird for binary compatibility */
-pub const T_CHAR: c_int = 7; /* 1-character string */
-pub const T_BYTE: c_int = 8; /* 8-bit signed int */
-/* unsigned variants: */
-pub const T_UBYTE: c_int = 9;
-pub const T_USHORT: c_int = 10;
-pub const T_UINT: c_int = 11;
-pub const T_ULONG: c_int = 12;
-
-/* Added by Jack: strings contained in the structure */
-pub const T_STRING_INPLACE: c_int = 13;
-
-/* Added by Lillo: bools contained in the structure (assumed char) */
-pub const T_BOOL: c_int = 14;
-
-pub const T_OBJECT_EX: c_int = 16; /* Like T_OBJECT, but raises AttributeError
-                                   when the value is NULL, instead of
-                                   converting to None. */
-
-pub const T_LONGLONG: c_int = 17;
-pub const T_ULONGLONG: c_int = 18;
-
-pub const T_PYSSIZET: c_int = 19; /* Py_ssize_t */
-pub const T_NONE: c_int = 20; /* Value is always None */
+pub use crate::Py_T_PYSSIZET as T_PYSSIZET;
+#[allow(deprecated)]
+pub use crate::_Py_T_NONE as T_NONE;
 
 /* Flags */
-pub const READONLY: c_int = 1;
+pub use crate::Py_READONLY as READONLY;
 pub const READ_RESTRICTED: c_int = 2;
 pub const PY_WRITE_RESTRICTED: c_int = 4;
 pub const RESTRICTED: c_int = READ_RESTRICTED | PY_WRITE_RESTRICTED;
-
-extern "C" {
-    pub fn PyMember_GetOne(addr: *const c_char, l: *mut PyMemberDef) -> *mut PyObject;
-    pub fn PyMember_SetOne(addr: *mut c_char, l: *mut PyMemberDef, value: *mut PyObject) -> c_int;
-}