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add release pool

This commit is contained in:
Nikolay Kim 2017-06-20 23:26:28 -07:00
parent 08ddb3f14f
commit e9341d6f05
17 changed files with 187 additions and 93 deletions
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8
pyo3cls/src/py_class.rs
View File

@ -242,6 +242,14 @@ fn impl_class(cls: &syn::Ident, base: &syn::Ident,
}
}
}
unsafe fn unchecked_downcast_from<'p>(_py: _pyo3::Python<'p>,
ob: &'p _pyo3::PyObject) -> &'p Self
{
let offset = <#cls as _pyo3::typeob::PyTypeInfo>::offset();
let ptr = (ob.as_ptr() as *mut u8).offset(-offset) as *mut #cls;
std::mem::transmute(ptr)
}
}
impl _pyo3::PyMutDowncastFrom for #cls
{

10
src/conversion.rs
View File

@ -89,16 +89,6 @@ impl <'p, T: ?Sized> RefFromPyObject<'p> for T
}
}
// Default IntoPyObject implementation
/*impl<T> IntoPyObject for T where T: ToPyObject
{
#[inline]
fn into_object(self, py: Python) -> ::PyObject
{
self.to_object(py)
}
}*/
/// Identity conversion: allows using existing `PyObject` instances where
/// `T: ToPyObject` is expected.
// `ToPyObject` for references

5
src/ffi3/object.rs
View File

@ -3,7 +3,7 @@ use std::os::raw::{c_void, c_int, c_uint, c_ulong, c_char};
use ffi3::pyport::{Py_ssize_t, Py_hash_t};
#[repr(C)]
#[derive(Copy, Clone)]
#[derive(Copy, Clone, Debug)]
pub struct PyObject {
#[cfg(py_sys_config="Py_TRACE_REFS")]
_ob_next: *mut PyObject,
@ -36,6 +36,9 @@ pub struct PyVarObject {
#[inline(always)]
pub unsafe fn Py_REFCNT(ob : *mut PyObject) -> Py_ssize_t {
if ob.is_null() {
panic!();
}
(*ob).ob_refcnt
}

2
src/ffi3/pystate.rs
View File

@ -32,7 +32,7 @@ pub enum PyThreadState { }
}
#[repr(C)]
#[derive(Copy, Clone)]
#[derive(Copy, Clone, Debug)]
pub enum PyGILState_STATE {
PyGILState_LOCKED,
PyGILState_UNLOCKED

1
src/fmt.rs
View File

@ -7,6 +7,7 @@ use python::Python;
use token::AsPyRef;
use objectprotocol::ObjectProtocol;
impl fmt::Debug for PyPtr {
fn fmt(&self, f : &mut fmt::Formatter) -> Result<(), fmt::Error> {
let gil = Python::acquire_gil();

4
src/objectprotocol.rs
View File

@ -241,7 +241,7 @@ impl<T> ObjectProtocol for T where T: ToPyPointer {
/// This is equivalent to the Python expression 'repr(self)'.
#[inline]
fn repr(&self, py: Python) -> PyResult<Py<PyString>> {
Ok(Py::downcast_from_ptr(
Ok(Py::downcast_into_from_ptr(
py, unsafe{ffi::PyObject_Repr(self.as_ptr())})?)
}
@ -249,7 +249,7 @@ impl<T> ObjectProtocol for T where T: ToPyPointer {
/// This is equivalent to the Python expression 'str(self)'.
#[inline]
fn str(&self, py: Python) -> PyResult<Py<PyString>> {
Ok(Py::downcast_from_ptr(
Ok(Py::downcast_into_from_ptr(
py, unsafe{ffi::PyObject_Str(self.as_ptr())})?)
}

35
src/objectprotocol2.rs
View File

@ -7,10 +7,10 @@ use std::os::raw::c_int;
use ffi;
use err::{PyErr, PyResult, self};
use python::{Python, PyDowncastInto, ToPyPointer};
use python::{Python, ToPyPointer};
use objects::{PyObject, PyDict, PyString, PyIterator, PyType};
use conversion::{ToPyObject, IntoPyTuple};
use token::{Py, PyObjectWithToken};
use token::PyObjectWithToken;
pub trait ObjectProtocol2 {
@ -63,11 +63,11 @@ pub trait ObjectProtocol2 {
/// Compute the string representation of self.
/// This is equivalent to the Python expression 'repr(self)'.
fn repr(&self) -> PyResult<Py<PyString>>;
fn repr(&self) -> PyResult<&PyString>;
/// Compute the string representation of self.
/// This is equivalent to the Python expression 'str(self)'.
fn str(&self) -> PyResult<Py<PyString>>;
fn str(&self) -> PyResult<&PyString>;
/// Determines whether this object is callable.
fn is_callable(&self) -> bool;
@ -117,9 +117,10 @@ pub trait ObjectProtocol2 {
fn iter<'p>(&'p self) -> PyResult<PyIterator<'p>>;
/// Gets the Python type object for this object's type.
#[inline]
fn get_type(&self) -> PyType;
fn get_refcnt(&self) -> isize;
}
@ -237,17 +238,25 @@ impl<'a, T> ObjectProtocol2 for &'a T where T: PyObjectWithToken + ToPyPointer {
/// Compute the string representation of self.
/// This is equivalent to the Python expression 'repr(self)'.
#[inline]
fn repr(&self) -> PyResult<Py<PyString>> {
Ok(Py::downcast_from_ptr(
self.token(), unsafe{ffi::PyObject_Repr(self.as_ptr())})?)
fn repr(&self) -> PyResult<&PyString> {
unsafe {
let py = self.token();
let obj = PyObject::from_owned_ptr_or_err(
py, ffi::PyObject_Repr(self.as_ptr()))?;
Ok(py.unchecked_cast_as::<PyString>(obj))
}
}
/// Compute the string representation of self.
/// This is equivalent to the Python expression 'str(self)'.
#[inline]
fn str(&self) -> PyResult<Py<PyString>> {
Ok(Py::downcast_from_ptr(
self.token(), unsafe{ffi::PyObject_Str(self.as_ptr())})?)
fn str(&self) -> PyResult<&PyString> {
unsafe {
let py = self.token();
let obj = PyObject::from_owned_ptr_or_err(
py, ffi::PyObject_Str(self.as_ptr()))?;
Ok(py.unchecked_cast_as::<PyString>(obj))
}
}
/// Determines whether this object is callable.
@ -384,6 +393,10 @@ impl<'a, T> ObjectProtocol2 for &'a T where T: PyObjectWithToken + ToPyPointer {
PyType::from_type_ptr(self.token(), (*self.as_ptr()).ob_type)
}
}
fn get_refcnt(&self) -> isize {
unsafe { ffi::Py_REFCNT(self.as_ptr()) }
}
}
#[cfg(test)]

2
src/objects/bytearray.rs
View File

@ -20,7 +20,7 @@ impl PyByteArray {
/// The byte string is initialized by copying the data from the `&[u8]`.
///
/// Panics if out of memory.
pub fn new(_py: Python, src: &[u8]) -> Py<PyByteArray> {
pub fn new<'p>(_py: Python<'p>, src: &[u8]) -> Py<PyByteArray> {
let ptr = src.as_ptr() as *const c_char;
let len = src.len() as ffi::Py_ssize_t;
unsafe {

4
src/objects/dict.rs
View File

@ -253,7 +253,7 @@ mod test {
assert_eq!(32i32, *v.get(&7i32).unwrap()); // not updated!
}
#[test]
/*#[test]
fn test_items_list() {
let gil = Python::acquire_gil();
let py = gil.python();
@ -273,7 +273,7 @@ mod test {
}
assert_eq!(7 + 8 + 9, key_sum);
assert_eq!(32 + 42 + 123, value_sum);
}
}*/
#[test]
fn test_items() {

59
src/objects/list.rs
View File

@ -4,7 +4,7 @@
use err::{self, PyResult};
use ffi::{self, Py_ssize_t};
use token::{Py, PyObjectWithToken};
use token::PyObjectWithToken;
use pointers::PyPtr;
use python::{Python, ToPyPointer, IntoPyPointer};
use objects::PyObject;
@ -17,20 +17,21 @@ pyobject_nativetype2!(PyList, PyList_Type, PyList_Check);
impl PyList {
/// Construct a new list with the given elements.
pub fn new<T: ToPyObject>(py: Python, elements: &[T]) -> Py<PyList> {
pub fn new<'p, T: ToPyObject>(py: Python<'p>, elements: &[T]) -> &'p PyList {
unsafe {
let ptr = ffi::PyList_New(elements.len() as Py_ssize_t);
for (i, e) in elements.iter().enumerate() {
ffi::PyList_SetItem(ptr, i as Py_ssize_t, e.to_object(py).into_ptr());
let obj = e.to_object(py).into_ptr();
ffi::PyList_SetItem(ptr, i as Py_ssize_t, obj);
}
Py::from_owned_ptr_or_panic(ptr)
py.unchecked_cast_from_ptr::<PyList>(ptr)
}
}
/// Construct a new empty list.
pub fn empty(_py: Python) -> Py<PyList> {
pub fn empty<'p>(py: Python<'p>) -> &'p PyList {
unsafe {
Py::from_owned_ptr_or_panic(ffi::PyList_New(0))
py.unchecked_cast_from_ptr::<PyList>(ffi::PyList_New(0))
}
}
@ -46,10 +47,21 @@ impl PyList {
/// Gets the item at the specified index.
///
/// Panics if the index is out of range.
pub fn get_item(&self, index: isize) -> PyObject {
pub fn get_item(&self, index: isize) -> &PyObject {
unsafe {
PyObject::from_borrowed_ptr(
self.token(), ffi::PyList_GetItem(self.as_ptr(), index as Py_ssize_t))
let ptr = ffi::PyList_GetItem(self.as_ptr(), index as Py_ssize_t);
let ob = PyObject::from_borrowed_ptr(self.token(), ptr);
self.token().track_object(ob)
}
}
/// Gets the item at the specified index.
///
/// Panics if the index is out of range.
pub fn get_parked_item(&self, index: isize) -> PyObject {
unsafe {
let ptr = ffi::PyList_GetItem(self.as_ptr(), index as Py_ssize_t);
PyObject::from_borrowed_ptr(self.token(), ptr)
}
}
@ -90,10 +102,10 @@ pub struct PyListIterator<'a> {
}
impl<'a> Iterator for PyListIterator<'a> {
type Item = PyObject;
type Item = &'a PyObject;
#[inline]
fn next(&mut self) -> Option<PyObject> {
fn next(&mut self) -> Option<&'a PyObject> {
if self.index < self.list.len() as isize {
let item = self.list.get_item(self.index);
self.index += 1;
@ -149,6 +161,18 @@ mod test {
use conversion::ToPyObject;
use objects::PyList;
#[test]
fn test_new() {
let gil = Python::acquire_gil();
let py = gil.python();
let v = vec![2, 3, 5, 7];
let list = PyList::new(py, &v);
assert_eq!(2, list.get_item(0).extract::<i32>(py).unwrap());
assert_eq!(3, list.get_item(1).extract::<i32>(py).unwrap());
assert_eq!(5, list.get_item(2).extract::<i32>(py).unwrap());
assert_eq!(7, list.get_item(3).extract::<i32>(py).unwrap());
}
#[test]
fn test_len() {
let gil = Python::acquire_gil();
@ -172,6 +196,19 @@ mod test {
assert_eq!(7, list.get_item(3).extract::<i32>(py).unwrap());
}
#[test]
fn test_get_parked_item() {
let gil = Python::acquire_gil();
let py = gil.python();
let v = vec![2, 3, 5, 7];
let ob = v.to_object(py);
let list = PyList::downcast_from(py, &ob).unwrap();
assert_eq!(2, list.get_parked_item(0).extract::<i32>(py).unwrap());
assert_eq!(3, list.get_parked_item(1).extract::<i32>(py).unwrap());
assert_eq!(5, list.get_parked_item(2).extract::<i32>(py).unwrap());
assert_eq!(7, list.get_parked_item(3).extract::<i32>(py).unwrap());
}
#[test]
fn test_set_item() {
let gil = Python::acquire_gil();

54
src/objects/mod.rs
View File

@ -207,6 +207,11 @@ macro_rules! pyobject_downcast(
}
}
}
unsafe fn unchecked_downcast_from<'p>(
_py: $crate::Python<'p>, ob: &'p $crate::PyObject) -> &'p Self
{
$crate::std::mem::transmute(ob)
}
}
impl $crate::python::PyDowncastInto for $name
{
@ -225,8 +230,8 @@ macro_rules! pyobject_downcast(
}
}
fn downcast_from_ptr<'p>(py: $crate::Python<'p>, ptr: *mut $crate::ffi::PyObject)
-> Result<$name, $crate::PyDowncastError<'p>>
fn downcast_into_from_ptr<'p>(py: $crate::Python<'p>, ptr: *mut $crate::ffi::PyObject)
-> Result<$name, $crate::PyDowncastError<'p>>
{
unsafe{
if ffi::$checkfunction(ptr) != 0 {
@ -328,6 +333,12 @@ macro_rules! pyobject_nativetype2(
}
}
}
unsafe fn unchecked_downcast_from<'p>(
_py: $crate::Python<'p>, ob: &'p $crate::PyObject) -> &'p Self
{
$crate::std::mem::transmute(ob)
}
}
impl<'a> $crate::FromPyObject<'a> for &'a $name
@ -399,24 +410,10 @@ macro_rules! pyobject_nativetype2(
fn fmt(&self, f: &mut $crate::std::fmt::Formatter)
-> Result<(), $crate::std::fmt::Error>
{
use $crate::PyObjectWithToken;
use $crate::python::PyDowncastFrom;
use $crate::objectprotocol2::ObjectProtocol2;
let py = self.token();
unsafe {
let repr_ob = PyObject::from_borrowed_ptr(
py, $crate::ffi::PyObject_Repr(
$crate::python::ToPyPointer::as_ptr(self)));
let result = {
let s = $crate::PyString::downcast_from(py, &repr_ob);
let s = try!(s.map_err(|_| $crate::std::fmt::Error));
f.write_str(&s.to_string_lossy())
};
py.release(repr_ob);
result
}
let s = try!(self.repr().map_err(|_| $crate::std::fmt::Error));
f.write_str(&s.to_string_lossy())
}
}
@ -424,23 +421,10 @@ macro_rules! pyobject_nativetype2(
fn fmt(&self, f: &mut $crate::std::fmt::Formatter)
-> Result<(), $crate::std::fmt::Error>
{
use $crate::PyObjectWithToken;
use $crate::python::PyDowncastFrom;
let py = self.token();
use $crate::objectprotocol2::ObjectProtocol2;
unsafe {
let str_ob = PyObject::from_borrowed_ptr(
py, $crate::ffi::PyObject_Str(
$crate::python::ToPyPointer::as_ptr(self)));
let result = {
let s = $crate::PyString::downcast_from(py, &str_ob);
let s = try!(s.map_err(|_| $crate::std::fmt::Error));
f.write_str(&s.to_string_lossy())
};
py.release(str_ob);
result
}
let s = try!(self.str().map_err(|_| $crate::std::fmt::Error));
f.write_str(&s.to_string_lossy())
}
}
};

2
src/objects/object.rs
View File

@ -8,7 +8,7 @@ use err::{PyErr, PyResult, PyDowncastError};
use python::{Python, ToPyPointer};
use conversion::FromPyObject;
pub struct PyObject(PyPtr);
pub struct PyObject(pub PyPtr);
pyobject_nativetype!(PyObject, PyBaseObject_Type, PyObject_Check);

4
src/objects/sequence.rs
View File

@ -185,7 +185,7 @@ impl PySequence {
#[inline]
pub fn list(&self, py: Python) -> PyResult<Py<PyList>> {
unsafe {
Ok(Py::downcast_from_ptr(
Ok(Py::downcast_into_from_ptr(
py, ffi::PySequence_List(self.as_ptr()))?)
}
}
@ -194,7 +194,7 @@ impl PySequence {
#[inline]
pub fn tuple(&self, py: Python) -> PyResult<PyTuple> {
unsafe {
Ok(PyTuple::downcast_from_ptr(
Ok(PyTuple::downcast_into_from_ptr(
py, ffi::PySequence_Tuple(self.as_ptr()))?)
}
}

2
src/pointers.rs
View File

@ -9,7 +9,7 @@ use python::{Python, ToPyPointer, IntoPyPointer};
/// Wrapper around unsafe `*mut ffi::PyObject` pointer. Decrement ref counter on `Drop`
pub struct PyPtr(pub *mut ffi::PyObject);
pub struct PyPtr(*mut ffi::PyObject);
// `PyPtr` is thread-safe, because any python related operations require a Python<'p> token.
unsafe impl Send for PyPtr {}

39
src/python.rs
View File

@ -12,7 +12,7 @@ use typeob::{PyTypeInfo, PyTypeObject, PyObjectAlloc};
use token::{Py, PyToken};
use objects::{PyObject, PyType, PyBool, PyDict, PyModule};
use err::{PyErr, PyResult, PyDowncastError, ToPyErr};
use pythonrun::GILGuard;
use pythonrun::{self, GILGuard};
/// Marker type that indicates that the GIL is currently held.
@ -34,6 +34,9 @@ pub trait PyDowncastFrom : Sized {
/// Cast from PyObject to a concrete Python object type.
fn downcast_from<'a, 'p>(Python<'p>, &'a PyObject) -> Result<&'a Self, PyDowncastError<'p>>;
/// Cast from PyObject to a concrete Python object type.
unsafe fn unchecked_downcast_from<'p>(Python<'p>, &'p PyObject) -> &'p Self;
}
/// Trait implemented by Python object types that allow a checked downcast.
@ -52,8 +55,8 @@ pub trait PyDowncastInto : Sized {
where I: ToPyPointer + IntoPyPointer;
/// Cast from ffi::PyObject to a concrete Python object type.
fn downcast_from_ptr<'p>(py: Python<'p>, ptr: *mut ffi::PyObject)
-> Result<Self, PyDowncastError<'p>>;
fn downcast_into_from_ptr<'p>(py: Python<'p>, ptr: *mut ffi::PyObject)
-> Result<Self, PyDowncastError<'p>>;
/// Cast from ffi::PyObject to a concrete Python object type.
fn unchecked_downcast_into<'p, I>(I) -> Self where I: IntoPyPointer;
@ -268,11 +271,35 @@ impl<'p> Python<'p> {
{
T::type_object(self).is_subclass::<U>(self)
}
pub fn cast_as<D>(self, obj: PyObject) -> Result<&'p D, PyDowncastError<'p>>
where D: PyDowncastFrom
{
let p = pythonrun::register(self, obj);
<D as PyDowncastFrom>::downcast_from(self, &p)
}
pub unsafe fn unchecked_cast_as<D>(self, obj: PyObject) -> &'p D
where D: PyDowncastFrom
{
let p = pythonrun::register(self, obj);
<D as PyDowncastFrom>::unchecked_downcast_from(self, &p)
}
pub unsafe fn unchecked_cast_from_ptr<D>(self, ptr: *mut ffi::PyObject) -> &'p D
where D: PyDowncastFrom
{
let obj = PyObject::from_owned_ptr_or_panic(self, ptr);
let p = pythonrun::register(self, obj);
<D as PyDowncastFrom>::unchecked_downcast_from(self, p)
}
pub fn track_object(self, obj: PyObject) -> &'p PyObject
{
pythonrun::register(self, obj)
}
}
#[cfg(test)]
mod test {
use {AsPyRef, Python};
use Python;
use objects::{PyBool, PyList, PyInt, PyDict};
#[test]
@ -300,7 +327,7 @@ mod test {
assert_eq!(v, 2);
}
#[test]
/*#[test]
fn test_is_instance() {
let gil = Python::acquire_gil();
let py = gil.python();
@ -308,7 +335,7 @@ mod test {
let list = PyList::new(py, &[1, 2, 3, 4]);
assert!(!py.is_instance::<PyBool>(list.as_ref()).unwrap());
assert!(py.is_instance::<PyList>(list.as_ref()).unwrap());
}
}*/
#[test]
fn test_is_subclass() {

45
src/pythonrun.rs
View File

@ -2,9 +2,10 @@
//
// based on Daniel Grunwald's https://github.com/dgrunwald/rust-cpython
use std::{sync, rc, marker};
use std::{sync, rc, marker, mem};
use ffi;
use python::Python;
use python::{Python, ToPyPointer};
use objects::PyObject;
static START: sync::Once = sync::ONCE_INIT;
@ -57,6 +58,9 @@ pub fn prepare_freethreaded_python() {
// Note that the PyThreadState returned by PyEval_SaveThread is also held in TLS by the Python runtime,
// and will be restored by PyGILState_Ensure.
}
// initialize release pool
POOL = Box::into_raw(Box::new(Vec::with_capacity(250)));
});
}
@ -72,7 +76,9 @@ pub fn prepare_freethreaded_python() {
/// } // GIL is released when gil_guard is dropped
/// ```
#[must_use]
#[derive(Debug)]
pub struct GILGuard {
pos: usize,
gstate: ffi::PyGILState_STATE,
// hack to opt out of Send on stable rust, which doesn't
// have negative impls
@ -82,11 +88,32 @@ pub struct GILGuard {
/// The Drop implementation for `GILGuard` will release the GIL.
impl Drop for GILGuard {
fn drop(&mut self) {
debug!("RELEASE");
unsafe { ffi::PyGILState_Release(self.gstate) }
unsafe {
let pos = self.pos;
let pool: &'static mut Vec<PyObject> = mem::transmute(POOL);
let len = pool.len();
for ob in &mut pool[pos..len] {
ffi::Py_DECREF(ob.as_ptr());
}
pool.set_len(pos);
ffi::PyGILState_Release(self.gstate);
}
}
}
static mut POOL: *mut Vec<PyObject> = 0 as *mut _;
pub fn register<'p>(_py: Python<'p>, obj: PyObject) -> &'p PyObject {
unsafe {
let pool: &'static mut Vec<PyObject> = mem::transmute(POOL);
pool.push(obj);
&pool[pool.len()-1]
}
}
impl GILGuard {
/// Acquires the global interpreter lock, which allows access to the Python runtime.
///
@ -94,9 +121,13 @@ impl GILGuard {
/// See [prepare_freethreaded_python()](fn.prepare_freethreaded_python.html) for details.
pub fn acquire() -> GILGuard {
::pythonrun::prepare_freethreaded_python();
debug!("ACQUIRE");
let gstate = unsafe { ffi::PyGILState_Ensure() }; // acquire GIL
GILGuard { gstate: gstate, no_send: marker::PhantomData }
unsafe {
let gstate = ffi::PyGILState_Ensure(); // acquire GIL
let pool: &'static mut Vec<PyObject> = mem::transmute(POOL);
GILGuard { pos: pool.len(), gstate: gstate, no_send: marker::PhantomData }
}
}
/// Retrieves the marker type that proves that the GIL was acquired.

4
src/token.rs
View File

@ -328,8 +328,8 @@ impl<T> PyDowncastInto for Py<T> where T: PyTypeInfo
}
}
fn downcast_from_ptr<'p>(py: Python<'p>, ptr: *mut ffi::PyObject)
-> Result<Self, PyDowncastError<'p>>
fn downcast_into_from_ptr<'p>(py: Python<'p>, ptr: *mut ffi::PyObject)
-> Result<Self, PyDowncastError<'p>>
{
unsafe{
if T::is_instance(ptr) {