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extmod/modusocket: Implement optional socket.listen backlog argument.

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This follows the CPython change: https://bugs.python.org/issue21455

Socket listen backlog defaults to 2 if not given, based on most bare metal
targets not having many resources for a large backlog.  On UNIX it defaults
to SOMAXCONN or 128, whichever is less.
This commit is contained in:
Jon Bjarni Bjarnason
2022-02-16 11:44:17 -05:00
committed by Damien George
parent d3d862769a
commit 919f696ad2
7 changed files with 54 additions and 22 deletions
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12
ports/zephyr/modusocket.c
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@@ -185,11 +185,17 @@ STATIC mp_obj_t socket_connect(mp_obj_t self_in, mp_obj_t addr_in) {
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_connect_obj, socket_connect);
STATIC mp_obj_t socket_listen(mp_obj_t self_in, mp_obj_t backlog_in) {
socket_obj_t *socket = self_in;
// method socket.listen([backlog])
STATIC mp_obj_t socket_listen(size_t n_args, const mp_obj_t *args) {
socket_obj_t *socket = args[0];
socket_check_closed(socket);
mp_int_t backlog = mp_obj_get_int(backlog_in);
mp_int_t backlog = 2;
if (n_args > 1) {
backlog = mp_obj_get_int(args[1]);
backlog = (backlog < 0) ? 0 : backlog;
}
int res = zsock_listen(socket->ctx, backlog);
RAISE_SOCK_ERRNO(res);