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use std;
use ffi;
use pythonrun;
use err::{PyErr, PyResult, PyDowncastError};
use instance::{AsPyRef, PyObjectWithToken};
use objects::{PyTuple, PyObjectRef};
use conversion::{ToPyObject, ToBorrowedObject,
IntoPyObject, IntoPyTuple, FromPyObject, PyTryFrom};
use python::{Python, ToPyPointer, IntoPyPointer, IntoPyDictPointer};
#[derive(Debug)]
pub struct PyObject(*mut ffi::PyObject);
unsafe impl Send for PyObject {}
unsafe impl Sync for PyObject {}
impl PyObject {
#[inline]
pub unsafe fn from_owned_ptr(_py: Python, ptr: *mut ffi::PyObject) -> PyObject {
debug_assert!(!ptr.is_null() && ffi::Py_REFCNT(ptr) > 0,
format!("REFCNT: {:?} - {:?}", ptr, ffi::Py_REFCNT(ptr)));
PyObject(ptr)
}
#[inline]
pub unsafe fn from_owned_ptr_or_panic(py: Python, ptr: *mut ffi::PyObject) -> PyObject
{
if ptr.is_null() {
::err::panic_after_error();
} else {
PyObject::from_owned_ptr(py, ptr)
}
}
pub unsafe fn from_owned_ptr_or_err(py: Python, ptr: *mut ffi::PyObject)
-> PyResult<PyObject>
{
if ptr.is_null() {
Err(PyErr::fetch(py))
} else {
Ok(PyObject::from_owned_ptr(py, ptr))
}
}
pub unsafe fn from_owned_ptr_or_opt(py: Python, ptr: *mut ffi::PyObject) -> Option<PyObject>
{
if ptr.is_null() {
None
} else {
Some(PyObject::from_owned_ptr(py, ptr))
}
}
#[inline]
pub unsafe fn from_borrowed_ptr(_py: Python, ptr: *mut ffi::PyObject) -> PyObject {
debug_assert!(!ptr.is_null() && ffi::Py_REFCNT(ptr) > 0,
format!("REFCNT: {:?} - {:?}", ptr, ffi::Py_REFCNT(ptr)));
ffi::Py_INCREF(ptr);
PyObject(ptr)
}
pub unsafe fn from_borrowed_ptr_or_err(py: Python, ptr: *mut ffi::PyObject)
-> PyResult<PyObject>
{
if ptr.is_null() {
Err(PyErr::fetch(py))
} else {
Ok(PyObject::from_borrowed_ptr(py, ptr))
}
}
pub unsafe fn from_borrowed_ptr_or_opt(py: Python, ptr: *mut ffi::PyObject)
-> Option<PyObject>
{
if ptr.is_null() {
None
} else {
Some(PyObject::from_borrowed_ptr(py, ptr))
}
}
pub fn get_refcnt(&self) -> isize {
unsafe { ffi::Py_REFCNT(self.0) }
}
pub fn clone_ref(&self, py: Python) -> Self {
unsafe {
PyObject::from_borrowed_ptr(py, self.as_ptr())
}
}
pub fn is_none(&self) -> bool {
unsafe { ffi::Py_None() == self.as_ptr() }
}
pub fn is_true(&self, py: Python) -> PyResult<bool> {
let v = unsafe { ffi::PyObject_IsTrue(self.as_ptr()) };
if v == -1 {
Err(PyErr::fetch(py))
} else {
Ok(v != 0)
}
}
pub fn cast_as<D>(&self, py: Python) -> Result<&D, <D as PyTryFrom>::Error>
where D: PyTryFrom<Error=PyDowncastError>
{
D::try_from(self.as_ref(py))
}
pub fn extract<'p, D>(&'p self, py: Python) -> PyResult<D> where D: FromPyObject<'p>
{
FromPyObject::extract(self.as_ref(py))
}
pub fn getattr<N>(&self, py: Python, attr_name: N) -> PyResult<PyObject>
where N: ToPyObject
{
attr_name.with_borrowed_ptr(py, |attr_name| unsafe {
PyObject::from_owned_ptr_or_err(
py, ffi::PyObject_GetAttr(self.as_ptr(), attr_name))
})
}
pub fn call<A, K>(&self, py: Python, args: A, kwargs: K) -> PyResult<PyObject>
where A: IntoPyTuple,
K: IntoPyDictPointer
{
let args = args.into_tuple(py).into_ptr();
let kwargs = kwargs.into_dict_ptr(py);
let result = unsafe {
PyObject::from_owned_ptr_or_err(
py, ffi::PyObject_Call(self.as_ptr(), args, kwargs))
};
py.xdecref(args);
py.xdecref(kwargs);
result
}
pub fn call0(&self, py: Python) -> PyResult<PyObject>
{
let args = PyTuple::empty(py).into_ptr();
let result = unsafe {
PyObject::from_owned_ptr_or_err(
py, ffi::PyObject_Call(self.as_ptr(), args, std::ptr::null_mut()))
};
py.xdecref(args);
result
}
pub fn call1<A>(&self, py: Python, args: A) -> PyResult<PyObject>
where A: IntoPyTuple
{
let args = args.into_tuple(py).into_ptr();
let result = unsafe {
PyObject::from_owned_ptr_or_err(
py, ffi::PyObject_Call(self.as_ptr(), args, std::ptr::null_mut()))
};
py.xdecref(args);
result
}
pub fn call_method<A, K>(&self, py: Python,
name: &str, args: A, kwargs: K) -> PyResult<PyObject>
where A: IntoPyTuple,
K: IntoPyDictPointer
{
name.with_borrowed_ptr(py, |name| unsafe {
let args = args.into_tuple(py).into_ptr();
let kwargs = kwargs.into_dict_ptr(py);
let ptr = ffi::PyObject_GetAttr(self.as_ptr(), name);
let result = PyObject::from_owned_ptr_or_err(
py, ffi::PyObject_Call(ptr, args, kwargs));
ffi::Py_DECREF(ptr);
py.xdecref(args);
py.xdecref(kwargs);
result
})
}
pub fn call_method0(&self, py: Python, name: &str) -> PyResult<PyObject>
{
name.with_borrowed_ptr(py, |name| unsafe {
let args = PyTuple::empty(py).into_ptr();
let ptr = ffi::PyObject_GetAttr(self.as_ptr(), name);
let result = PyObject::from_owned_ptr_or_err(
py, ffi::PyObject_Call(ptr, args, std::ptr::null_mut()));
ffi::Py_DECREF(ptr);
py.xdecref(args);
result
})
}
pub fn call_method1<A>(&self, py: Python, name: &str, args: A) -> PyResult<PyObject>
where A: IntoPyTuple
{
name.with_borrowed_ptr(py, |name| unsafe {
let args = args.into_tuple(py).into_ptr();
let ptr = ffi::PyObject_GetAttr(self.as_ptr(), name);
let result = PyObject::from_owned_ptr_or_err(
py, ffi::PyObject_Call(ptr, args, std::ptr::null_mut()));
ffi::Py_DECREF(ptr);
py.xdecref(args);
result
})
}
}
impl AsPyRef<PyObjectRef> for PyObject {
#[inline]
fn as_ref(&self, _py: Python) -> &PyObjectRef {
unsafe {&*(self as *const _ as *mut PyObjectRef)}
}
#[inline]
fn as_mut(&self, _py: Python) -> &mut PyObjectRef {
unsafe {&mut *(self as *const _ as *mut PyObjectRef)}
}
}
impl ToPyObject for PyObject
{
#[inline]
fn to_object<'p>(&self, py: Python<'p>) -> PyObject {
unsafe {PyObject::from_borrowed_ptr(py, self.as_ptr())}
}
}
impl ToBorrowedObject for PyObject {
#[inline]
fn with_borrowed_ptr<F, R>(&self, _py: Python, f: F) -> R
where F: FnOnce(*mut ffi::PyObject) -> R
{
f(self.as_ptr())
}
}
impl ToPyPointer for PyObject {
#[inline]
fn as_ptr(&self) -> *mut ffi::PyObject {
self.0
}
}
impl<'a> ToPyPointer for &'a PyObject {
#[inline]
fn as_ptr(&self) -> *mut ffi::PyObject {
self.0
}
}
impl IntoPyPointer for PyObject {
#[inline]
#[must_use]
fn into_ptr(self) -> *mut ffi::PyObject {
let ptr = self.0;
std::mem::forget(self);
ptr
}
}
impl PartialEq for PyObject {
#[inline]
fn eq(&self, o: &PyObject) -> bool {
self.0 == o.0
}
}
impl IntoPyObject for PyObject
{
#[inline]
fn into_object(self, _py: Python) -> PyObject {
self
}
}
impl<'a> FromPyObject<'a> for PyObject
{
#[inline]
fn extract(ob: &'a PyObjectRef) -> PyResult<Self>
{
unsafe {
Ok(PyObject::from_borrowed_ptr(ob.py(), ob.as_ptr()))
}
}
}
impl Drop for PyObject {
fn drop(&mut self) {
unsafe { pythonrun::register_pointer(self.0); }
}
}