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extmod/moduselect: Refactor towards introduction of poll.ipoll(). 

This follows previous refactor made to unix/moduselect.
This commit is contained in:
Paul Sokolovsky 2017-04-29 13:05:20 +03:00
parent b08286948a
commit edc0dcb55c
1 changed files with 33 additions and 23 deletions
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56
extmod/moduselect.c
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@ -182,6 +182,7 @@ MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_select_select_obj, 3, 4, select_select);
typedef struct _mp_obj_poll_t {
mp_obj_base_t base;
mp_map_t poll_map;
int flags;
} mp_obj_poll_t;
/// \method register(obj[, eventmask])
@ -219,9 +220,7 @@ STATIC mp_obj_t poll_modify(mp_obj_t self_in, mp_obj_t obj_in, mp_obj_t eventmas
}
MP_DEFINE_CONST_FUN_OBJ_3(poll_modify_obj, poll_modify);
/// \method poll([timeout])
/// Timeout is in milliseconds.
STATIC mp_obj_t poll_poll(uint n_args, const mp_obj_t *args) {
STATIC mp_uint_t poll_poll_internal(uint n_args, const mp_obj_t *args) {
mp_obj_poll_t *self = args[0];
// work out timeout (its given already in ms)
@ -239,33 +238,44 @@ STATIC mp_obj_t poll_poll(uint n_args, const mp_obj_t *args) {
}
}
self->flags = flags;
mp_uint_t start_tick = mp_hal_ticks_ms();
mp_uint_t n_ready;
for (;;) {
// poll the objects
mp_uint_t n_ready = poll_map_poll(&self->poll_map, NULL);
n_ready = poll_map_poll(&self->poll_map, NULL);
if (n_ready > 0 || (timeout != -1 && mp_hal_ticks_ms() - start_tick >= timeout)) {
// one or more objects are ready, or we had a timeout
mp_obj_list_t *ret_list = mp_obj_new_list(n_ready, NULL);
n_ready = 0;
for (mp_uint_t i = 0; i < self->poll_map.alloc; ++i) {
if (!MP_MAP_SLOT_IS_FILLED(&self->poll_map, i)) {
continue;
}
poll_obj_t *poll_obj = (poll_obj_t*)self->poll_map.table[i].value;
if (poll_obj->flags_ret != 0) {
mp_obj_t tuple[2] = {poll_obj->obj, MP_OBJ_NEW_SMALL_INT(poll_obj->flags_ret)};
ret_list->items[n_ready++] = mp_obj_new_tuple(2, tuple);
if (flags & FLAG_ONESHOT) {
// Don't poll next time, until new event flags will be set explicitly
poll_obj->flags = 0;
}
}
}
return ret_list;
break;
}
MICROPY_EVENT_POLL_HOOK
}
return n_ready;
}
STATIC mp_obj_t poll_poll(uint n_args, const mp_obj_t *args) {
mp_obj_poll_t *self = args[0];
mp_uint_t n_ready = poll_poll_internal(n_args, args);
// one or more objects are ready, or we had a timeout
mp_obj_list_t *ret_list = mp_obj_new_list(n_ready, NULL);
n_ready = 0;
for (mp_uint_t i = 0; i < self->poll_map.alloc; ++i) {
if (!MP_MAP_SLOT_IS_FILLED(&self->poll_map, i)) {
continue;
}
poll_obj_t *poll_obj = (poll_obj_t*)self->poll_map.table[i].value;
if (poll_obj->flags_ret != 0) {
mp_obj_t tuple[2] = {poll_obj->obj, MP_OBJ_NEW_SMALL_INT(poll_obj->flags_ret)};
ret_list->items[n_ready++] = mp_obj_new_tuple(2, tuple);
if (self->flags & FLAG_ONESHOT) {
// Don't poll next time, until new event flags will be set explicitly
poll_obj->flags = 0;
}
}
}
return ret_list;
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(poll_poll_obj, 1, 3, poll_poll);