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bpo-32604: [_xxsubinterpreters] Add channel_send_wait(). #19829

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ericsnowcurrently wants to merge 7 commits into from
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bpo-32604: [_xxsubinterpreters] Add channel_send_wait(). #19829

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d379eb6
Add an arg converter for threading timeouts.
ericsnowcurrently May 1, 2020
7a80a29
Add _Py_DECREF_in_interpreter().
ericsnowcurrently May 1, 2020
a3c2678
Add a lock wrapper class.
ericsnowcurrently May 1, 2020
98433f5
Factor out _lockobj_free().
ericsnowcurrently May 1, 2020
b60ff28
Add _channelitem.recvlock.
ericsnowcurrently May 1, 2020
070f508
Pass recvlock through from _channel_send() to the channelitem.
ericsnowcurrently May 1, 2020
bdc8926
Add channel_send_wait().
ericsnowcurrently May 1, 2020
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Add channel_send_wait().
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@ericsnowcurrently
ericsnowcurrently committed May 1, 2020
commit bdc89265099c138cabae9e65c5d0bd5a75a7a741
39 changes: 39 additions & 0 deletions Modules/_xxsubinterpretersmodule.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2577,6 +2577,43 @@ PyDoc_STRVAR(channel_send_doc,
\n\
Add the object's data to the channel's queue.");

static PyObject *
channel_send_wait(PyObject *self, PyObject *args, PyObject *kwds)
{
static char *kwlist[] = {"cid", "obj", NULL};
int64_t cid;
PyObject *obj;
if (!PyArg_ParseTupleAndKeywords(args, kwds, "O&O:channel_send", kwlist,
channel_id_converter, &cid, &obj)) {
return NULL;
}

_lockobj *lock = _lockobj_new();
if (lock == NULL) {
return NULL;
}
if (_lockobj_acquire(lock) != 0) {
PyErr_SetString(PyExc_RuntimeError, "could not acquire lock");
_lockobj_dealloc(lock);
return NULL;
}
if (_channel_send(&_globals.channels, cid, obj, lock) != 0) {
_lockobj_dealloc(lock);
return NULL;
}
Py_INCREF(lock);
return (PyObject*)lock;
}

PyDoc_STRVAR(channel_send_wait_doc,
"channel_send_wait(cid, obj)\n\
\n\
Add the object's data to the channel's queue.\n\
\n\
The returned callable will block until the object is received.\n\
Note that it takes an optional 'timeout' arg like\n\
threading.Lock.acquire() does.");

static PyObject *
channel_recv(PyObject *self, PyObject *args, PyObject *kwds)
{
Expand Down Expand Up @@ -2729,6 +2766,8 @@ static PyMethodDef module_functions[] = {
METH_VARARGS | METH_KEYWORDS, channel_list_interpreters_doc},
{"channel_send", (PyCFunction)(void(*)(void))channel_send,
METH_VARARGS | METH_KEYWORDS, channel_send_doc},
{"channel_send_wait", (PyCFunction)(void(*)(void))channel_send_wait,
METH_VARARGS | METH_KEYWORDS, channel_send_wait_doc},
{"channel_recv", (PyCFunction)(void(*)(void))channel_recv,
METH_VARARGS | METH_KEYWORDS, channel_recv_doc},
{"channel_close", (PyCFunction)(void(*)(void))channel_close,
Expand Down