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stmhal/moduselect: Implement "oneshot polling" flag. 

Similar to recently added feature in unix port: if event triggers for an
objects, its polling flags are automatically reset, so it won't be polled
until they are set again explicitly.
stmhal-poll-oneshot
Paul Sokolovsky 2015-12-13 21:05:17 +02:00
parent 2d11b17419
commit 9471b7d5b7
1 changed files with 13 additions and 2 deletions
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15
stmhal/moduselect.c
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@ -33,6 +33,9 @@
#include "py/mphal.h"
#include "pybioctl.h"
// Flags for poll()
#define FLAG_ONESHOT (1)
/// \module select - Provides select function to wait for events on a stream
///
/// This module provides the select function.
@ -223,13 +226,17 @@ STATIC mp_obj_t poll_poll(uint n_args, const mp_obj_t *args) {
// work out timeout (its given already in ms)
mp_uint_t timeout = -1;
if (n_args == 2) {
int flags = 0;
if (n_args >= 2) {
if (args[1] != mp_const_none) {
mp_int_t timeout_i = mp_obj_get_int(args[1]);
if (timeout_i >= 0) {
timeout = timeout_i;
}
}
if (n_args >= 3) {
flags = mp_obj_get_int(args[2]);
}
}
mp_uint_t start_tick = mp_hal_ticks_ms();
@ -249,6 +256,10 @@ STATIC mp_obj_t poll_poll(uint n_args, const mp_obj_t *args) {
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;
@ -256,7 +267,7 @@ STATIC mp_obj_t poll_poll(uint n_args, const mp_obj_t *args) {
__WFI();
}
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(poll_poll_obj, 1, 2, poll_poll);
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(poll_poll_obj, 1, 3, poll_poll);
STATIC const mp_map_elem_t poll_locals_dict_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR_register), (mp_obj_t)&poll_register_obj },