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351 lines
11 KiB
351 lines
11 KiB
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2014 Damien P. George
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* Copyright (c) 2015-2017 Paul Sokolovsky
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "py/mpconfig.h"
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#if MICROPY_PY_USELECT_POSIX
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#include <stdio.h>
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#include <errno.h>
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#include <poll.h>
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#include "py/runtime.h"
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#include "py/stream.h"
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#include "py/obj.h"
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#include "py/objlist.h"
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#include "py/objtuple.h"
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#include "py/mphal.h"
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#include "fdfile.h"
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#define DEBUG 0
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#if MICROPY_PY_SOCKET
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extern const mp_obj_type_t mp_type_socket;
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#endif
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// Flags for poll()
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#define FLAG_ONESHOT (1)
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/// \class Poll - poll class
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typedef struct _mp_obj_poll_t {
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mp_obj_base_t base;
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unsigned short alloc;
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unsigned short len;
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struct pollfd *entries;
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mp_obj_t *obj_map;
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short iter_cnt;
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short iter_idx;
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int flags;
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// callee-owned tuple
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mp_obj_t ret_tuple;
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} mp_obj_poll_t;
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STATIC int get_fd(mp_obj_t fdlike) {
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if (MP_OBJ_IS_OBJ(fdlike)) {
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const mp_stream_p_t *stream_p = mp_get_stream_raise(fdlike, MP_STREAM_OP_IOCTL);
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int err;
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mp_uint_t res = stream_p->ioctl(fdlike, MP_STREAM_GET_FILENO, 0, &err);
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if (res != MP_STREAM_ERROR) {
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return res;
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}
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}
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return mp_obj_get_int(fdlike);
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}
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/// \method register(obj[, eventmask])
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STATIC mp_obj_t poll_register(size_t n_args, const mp_obj_t *args) {
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mp_obj_poll_t *self = MP_OBJ_TO_PTR(args[0]);
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bool is_fd = MP_OBJ_IS_INT(args[1]);
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int fd = get_fd(args[1]);
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mp_uint_t flags;
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if (n_args == 3) {
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flags = mp_obj_get_int(args[2]);
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} else {
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flags = POLLIN | POLLOUT;
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}
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struct pollfd *free_slot = NULL;
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struct pollfd *entry = self->entries;
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for (int i = 0; i < self->len; i++, entry++) {
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int entry_fd = entry->fd;
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if (entry_fd == fd) {
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entry->events = flags;
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return mp_const_false;
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}
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if (entry_fd == -1) {
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free_slot = entry;
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}
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}
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if (free_slot == NULL) {
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if (self->len >= self->alloc) {
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self->entries = m_renew(struct pollfd, self->entries, self->alloc, self->alloc + 4);
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if (self->obj_map) {
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self->obj_map = m_renew(mp_obj_t, self->obj_map, self->alloc, self->alloc + 4);
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}
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self->alloc += 4;
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}
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free_slot = &self->entries[self->len++];
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}
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if (!is_fd) {
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if (self->obj_map == NULL) {
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self->obj_map = m_new0(mp_obj_t, self->alloc);
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}
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self->obj_map[free_slot - self->entries] = args[1];
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}
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free_slot->fd = fd;
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free_slot->events = flags;
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free_slot->revents = 0;
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return mp_const_true;
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}
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MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(poll_register_obj, 2, 3, poll_register);
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/// \method unregister(obj)
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STATIC mp_obj_t poll_unregister(mp_obj_t self_in, mp_obj_t obj_in) {
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mp_obj_poll_t *self = MP_OBJ_TO_PTR(self_in);
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struct pollfd *entries = self->entries;
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int fd = get_fd(obj_in);
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for (int i = self->len - 1; i >= 0; i--) {
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if (entries->fd == fd) {
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entries->fd = -1;
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if (self->obj_map) {
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self->obj_map[entries - self->entries] = MP_OBJ_NULL;
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}
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break;
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}
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entries++;
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}
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// TODO raise KeyError if obj didn't exist in map
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_2(poll_unregister_obj, poll_unregister);
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/// \method modify(obj, eventmask)
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STATIC mp_obj_t poll_modify(mp_obj_t self_in, mp_obj_t obj_in, mp_obj_t eventmask_in) {
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mp_obj_poll_t *self = MP_OBJ_TO_PTR(self_in);
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struct pollfd *entries = self->entries;
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int fd = get_fd(obj_in);
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for (int i = self->len - 1; i >= 0; i--) {
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if (entries->fd == fd) {
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entries->events = mp_obj_get_int(eventmask_in);
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return mp_const_none;
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}
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entries++;
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}
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// obj doesn't exist in poller
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mp_raise_OSError(MP_ENOENT);
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}
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MP_DEFINE_CONST_FUN_OBJ_3(poll_modify_obj, poll_modify);
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STATIC int poll_poll_internal(size_t n_args, const mp_obj_t *args) {
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mp_obj_poll_t *self = MP_OBJ_TO_PTR(args[0]);
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// work out timeout (it's given already in ms)
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int timeout = -1;
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int flags = 0;
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if (n_args >= 2) {
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if (args[1] != mp_const_none) {
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mp_int_t timeout_i = mp_obj_get_int(args[1]);
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if (timeout_i >= 0) {
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timeout = timeout_i;
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}
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}
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if (n_args >= 3) {
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flags = mp_obj_get_int(args[2]);
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}
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}
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self->flags = flags;
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int n_ready = poll(self->entries, self->len, timeout);
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RAISE_ERRNO(n_ready, errno);
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return n_ready;
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}
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/// \method poll([timeout])
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/// Timeout is in milliseconds.
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STATIC mp_obj_t poll_poll(size_t n_args, const mp_obj_t *args) {
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int n_ready = poll_poll_internal(n_args, args);
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if (n_ready == 0) {
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return mp_const_empty_tuple;
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}
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mp_obj_poll_t *self = MP_OBJ_TO_PTR(args[0]);
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mp_obj_list_t *ret_list = MP_OBJ_TO_PTR(mp_obj_new_list(n_ready, NULL));
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int ret_i = 0;
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struct pollfd *entries = self->entries;
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for (int i = 0; i < self->len; i++, entries++) {
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if (entries->revents != 0) {
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mp_obj_tuple_t *t = MP_OBJ_TO_PTR(mp_obj_new_tuple(2, NULL));
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// If there's an object stored, return it, otherwise raw fd
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if (self->obj_map && self->obj_map[i] != MP_OBJ_NULL) {
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t->items[0] = self->obj_map[i];
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} else {
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t->items[0] = MP_OBJ_NEW_SMALL_INT(entries->fd);
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}
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t->items[1] = MP_OBJ_NEW_SMALL_INT(entries->revents);
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ret_list->items[ret_i++] = MP_OBJ_FROM_PTR(t);
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if (self->flags & FLAG_ONESHOT) {
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entries->events = 0;
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}
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}
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}
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return MP_OBJ_FROM_PTR(ret_list);
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}
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MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(poll_poll_obj, 1, 3, poll_poll);
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STATIC mp_obj_t poll_ipoll(size_t n_args, const mp_obj_t *args) {
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mp_obj_poll_t *self = MP_OBJ_TO_PTR(args[0]);
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if (self->ret_tuple == MP_OBJ_NULL) {
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self->ret_tuple = mp_obj_new_tuple(2, NULL);
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}
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int n_ready = poll_poll_internal(n_args, args);
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self->iter_cnt = n_ready;
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self->iter_idx = 0;
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return args[0];
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}
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MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(poll_ipoll_obj, 1, 3, poll_ipoll);
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STATIC mp_obj_t poll_iternext(mp_obj_t self_in) {
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mp_obj_poll_t *self = MP_OBJ_TO_PTR(self_in);
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if (self->iter_cnt == 0) {
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return MP_OBJ_STOP_ITERATION;
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}
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self->iter_cnt--;
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struct pollfd *entries = self->entries + self->iter_idx;
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for (int i = self->iter_idx; i < self->len; i++, entries++) {
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self->iter_idx++;
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if (entries->revents != 0) {
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mp_obj_tuple_t *t = MP_OBJ_TO_PTR(self->ret_tuple);
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// If there's an object stored, return it, otherwise raw fd
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if (self->obj_map && self->obj_map[i] != MP_OBJ_NULL) {
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t->items[0] = self->obj_map[i];
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} else {
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t->items[0] = MP_OBJ_NEW_SMALL_INT(entries->fd);
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}
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t->items[1] = MP_OBJ_NEW_SMALL_INT(entries->revents);
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if (self->flags & FLAG_ONESHOT) {
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entries->events = 0;
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}
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return MP_OBJ_FROM_PTR(t);
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}
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}
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assert(!"inconsistent number of poll active entries");
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self->iter_cnt = 0;
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return MP_OBJ_STOP_ITERATION;
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}
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#if DEBUG
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STATIC mp_obj_t poll_dump(mp_obj_t self_in) {
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mp_obj_poll_t *self = MP_OBJ_TO_PTR(self_in);
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struct pollfd *entries = self->entries;
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for (int i = self->len - 1; i >= 0; i--) {
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printf("fd: %d ev: %x rev: %x", entries->fd, entries->events, entries->revents);
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if (self->obj_map) {
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printf(" obj: %p", self->obj_map[entries - self->entries]);
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}
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printf("\n");
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entries++;
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}
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_1(poll_dump_obj, poll_dump);
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#endif
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STATIC const mp_rom_map_elem_t poll_locals_dict_table[] = {
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{ MP_ROM_QSTR(MP_QSTR_register), MP_ROM_PTR(&poll_register_obj) },
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{ MP_ROM_QSTR(MP_QSTR_unregister), MP_ROM_PTR(&poll_unregister_obj) },
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{ MP_ROM_QSTR(MP_QSTR_modify), MP_ROM_PTR(&poll_modify_obj) },
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{ MP_ROM_QSTR(MP_QSTR_poll), MP_ROM_PTR(&poll_poll_obj) },
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{ MP_ROM_QSTR(MP_QSTR_ipoll), MP_ROM_PTR(&poll_ipoll_obj) },
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#if DEBUG
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{ MP_ROM_QSTR(MP_QSTR_dump), MP_ROM_PTR(&poll_dump_obj) },
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#endif
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};
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STATIC MP_DEFINE_CONST_DICT(poll_locals_dict, poll_locals_dict_table);
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STATIC const mp_obj_type_t mp_type_poll = {
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{ &mp_type_type },
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.name = MP_QSTR_poll,
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.getiter = mp_identity_getiter,
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.iternext = poll_iternext,
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.locals_dict = (void*)&poll_locals_dict,
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};
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STATIC mp_obj_t select_poll(size_t n_args, const mp_obj_t *args) {
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int alloc = 4;
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if (n_args > 0) {
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alloc = mp_obj_get_int(args[0]);
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}
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mp_obj_poll_t *poll = m_new_obj(mp_obj_poll_t);
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poll->base.type = &mp_type_poll;
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poll->entries = m_new(struct pollfd, alloc);
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poll->alloc = alloc;
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poll->len = 0;
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poll->obj_map = NULL;
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poll->iter_cnt = 0;
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poll->ret_tuple = MP_OBJ_NULL;
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return MP_OBJ_FROM_PTR(poll);
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}
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MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_select_poll_obj, 0, 1, select_poll);
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STATIC const mp_rom_map_elem_t mp_module_select_globals_table[] = {
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{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_uselect) },
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{ MP_ROM_QSTR(MP_QSTR_poll), MP_ROM_PTR(&mp_select_poll_obj) },
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{ MP_ROM_QSTR(MP_QSTR_POLLIN), MP_ROM_INT(POLLIN) },
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{ MP_ROM_QSTR(MP_QSTR_POLLOUT), MP_ROM_INT(POLLOUT) },
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{ MP_ROM_QSTR(MP_QSTR_POLLERR), MP_ROM_INT(POLLERR) },
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{ MP_ROM_QSTR(MP_QSTR_POLLHUP), MP_ROM_INT(POLLHUP) },
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};
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STATIC MP_DEFINE_CONST_DICT(mp_module_select_globals, mp_module_select_globals_table);
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const mp_obj_module_t mp_module_uselect = {
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.base = { &mp_type_module },
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.globals = (mp_obj_dict_t*)&mp_module_select_globals,
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};
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#endif // MICROPY_PY_USELECT_POSIX
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