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use crate::ffi::frameobject::PyFrameObject;
use crate::ffi::object::*;
use crate::ffi::pyport::Py_ssize_t;
use std::os::raw::c_int;

#[repr(C)]
#[derive(Copy, Clone)]
pub struct PyGenObject {
    #[cfg(py_sys_config = "Py_TRACE_REFS")]
    pub _ob_next: *mut PyObject,
    #[cfg(py_sys_config = "Py_TRACE_REFS")]
    pub _ob_prev: *mut PyObject,
    pub ob_refcnt: Py_ssize_t,
    pub ob_type: *mut PyTypeObject,
    pub gi_frame: *mut PyFrameObject,
    pub gi_running: c_int,
    pub gi_code: *mut PyObject,
    pub gi_weakreflist: *mut PyObject,
}

#[cfg_attr(windows, link(name = "pythonXY"))]
extern "C" {
    pub static mut PyGen_Type: PyTypeObject;
}

#[inline]
pub unsafe fn PyGen_Check(op: *mut PyObject) -> c_int {
    PyObject_TypeCheck(op, &mut PyGen_Type)
}

#[inline]
pub unsafe fn PyGen_CheckExact(op: *mut PyObject) -> c_int {
    (Py_TYPE(op) == &mut PyGen_Type) as c_int
}

#[cfg_attr(windows, link(name = "pythonXY"))]
extern "C" {
    pub fn PyGen_New(frame: *mut PyFrameObject) -> *mut PyObject;
    pub fn PyGen_NeedsFinalizing(op: *mut PyGenObject) -> c_int;
}

#[cfg_attr(windows, link(name = "pythonXY"))]
extern "C" {
    pub static mut PyCoro_Type: PyTypeObject;
}

#[inline]
pub unsafe fn PyCoro_Check(op: *mut PyObject) -> c_int {
    PyObject_TypeCheck(op, &mut PyCoro_Type)
}

#[cfg_attr(windows, link(name = "pythonXY"))]
extern "C" {
    pub static mut _PyCoroWrapper_Type: PyTypeObject;
}

#[inline]
pub unsafe fn PyCoroWrapper_Check(op: *mut PyObject) -> c_int {
    PyObject_TypeCheck(op, &mut _PyCoroWrapper_Type)
}

#[cfg(Py_3_6)]
#[cfg_attr(windows, link(name = "pythonXY"))]
extern "C" {
    pub static mut PyAsyncGen_Type: PyTypeObject;
}

#[cfg(Py_3_6)]
#[inline]
pub unsafe fn PyAsyncGen_Check(op: *mut PyObject) -> c_int {
    PyObject_TypeCheck(op, &mut PyAsyncGen_Type)
}

#[cfg(not(Py_3_6))]
#[inline]
pub unsafe fn PyAsyncGen_Check(_op: *mut PyObject) -> c_int {
    0
}