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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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15
ports/esp32/modsocket.c
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@@ -295,9 +295,16 @@ STATIC mp_obj_t socket_bind(const mp_obj_t arg0, const mp_obj_t arg1) {
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_bind_obj, socket_bind);
STATIC mp_obj_t socket_listen(const mp_obj_t arg0, const mp_obj_t arg1) {
socket_obj_t *self = MP_OBJ_TO_PTR(arg0);
int backlog = mp_obj_get_int(arg1);
// method socket.listen([backlog])
STATIC mp_obj_t socket_listen(size_t n_args, const mp_obj_t *args) {
socket_obj_t *self = MP_OBJ_TO_PTR(args[0]);
int backlog = 2;
if (n_args > 1) {
backlog = mp_obj_get_int(args[1]);
backlog = (backlog < 0) ? 0 : backlog;
}
self->state = SOCKET_STATE_CONNECTED;
int r = lwip_listen(self->fd, backlog);
if (r < 0) {
@@ -305,7 +312,7 @@ STATIC mp_obj_t socket_listen(const mp_obj_t arg0, const mp_obj_t arg1) {
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_listen_obj, socket_listen);
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(socket_listen_obj, 1, 2, socket_listen);
STATIC mp_obj_t socket_accept(const mp_obj_t arg0) {
socket_obj_t *self = MP_OBJ_TO_PTR(arg0);