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-rw-r--r--unix/moduselect.c330
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diff --git a/unix/moduselect.c b/unix/moduselect.c
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-/*
- * This file is part of the MicroPython project, http://micropython.org/
- *
- * The MIT License (MIT)
- *
- * Copyright (c) 2014 Damien P. George
- * Copyright (c) 2015-2017 Paul Sokolovsky
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-#include "py/mpconfig.h"
-
-#if MICROPY_PY_USELECT_POSIX
-
-#include <stdio.h>
-#include <errno.h>
-#include <poll.h>
-
-#include "py/runtime.h"
-#include "py/obj.h"
-#include "py/objlist.h"
-#include "py/objtuple.h"
-#include "py/mphal.h"
-#include "fdfile.h"
-
-#if MICROPY_PY_SOCKET
-extern const mp_obj_type_t mp_type_socket;
-#endif
-
-// Flags for poll()
-#define FLAG_ONESHOT (1)
-
-/// \class Poll - poll class
-
-typedef struct _mp_obj_poll_t {
- mp_obj_base_t base;
- unsigned short alloc;
- unsigned short len;
- struct pollfd *entries;
- mp_obj_t *obj_map;
- short iter_cnt;
- short iter_idx;
- int flags;
- // callee-owned tuple
- mp_obj_t ret_tuple;
-} mp_obj_poll_t;
-
-STATIC int get_fd(mp_obj_t fdlike) {
- int fd;
- // Shortcut for fdfile compatible types
- if (MP_OBJ_IS_TYPE(fdlike, &mp_type_fileio)
- #if MICROPY_PY_SOCKET
- || MP_OBJ_IS_TYPE(fdlike, &mp_type_socket)
- #endif
- ) {
- mp_obj_fdfile_t *fdfile = MP_OBJ_TO_PTR(fdlike);
- fd = fdfile->fd;
- } else {
- fd = mp_obj_get_int(fdlike);
- }
- return fd;
-}
-
-/// \method register(obj[, eventmask])
-STATIC mp_obj_t poll_register(size_t n_args, const mp_obj_t *args) {
- mp_obj_poll_t *self = MP_OBJ_TO_PTR(args[0]);
- bool is_fd = MP_OBJ_IS_INT(args[1]);
- int fd = get_fd(args[1]);
-
- mp_uint_t flags;
- if (n_args == 3) {
- flags = mp_obj_get_int(args[2]);
- } else {
- flags = POLLIN | POLLOUT;
- }
-
- struct pollfd *free_slot = NULL;
-
- struct pollfd *entry = self->entries;
- for (int i = 0; i < self->len; i++, entry++) {
- int entry_fd = entry->fd;
- if (entry_fd == fd) {
- entry->events = flags;
- return mp_const_false;
- }
- if (entry_fd == -1) {
- free_slot = entry;
- }
- }
-
- if (free_slot == NULL) {
- if (self->len >= self->alloc) {
- self->entries = m_renew(struct pollfd, self->entries, self->alloc, self->alloc + 4);
- if (self->obj_map) {
- self->obj_map = m_renew(mp_obj_t, self->obj_map, self->alloc, self->alloc + 4);
- }
- self->alloc += 4;
- }
- free_slot = &self->entries[self->len++];
- }
-
- if (!is_fd) {
- if (self->obj_map == NULL) {
- self->obj_map = m_new0(mp_obj_t, self->alloc);
- }
- self->obj_map[free_slot - self->entries] = args[1];
- }
-
- free_slot->fd = fd;
- free_slot->events = flags;
- free_slot->revents = 0;
- return mp_const_true;
-}
-MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(poll_register_obj, 2, 3, poll_register);
-
-/// \method unregister(obj)
-STATIC mp_obj_t poll_unregister(mp_obj_t self_in, mp_obj_t obj_in) {
- mp_obj_poll_t *self = MP_OBJ_TO_PTR(self_in);
- struct pollfd *entries = self->entries;
- int fd = get_fd(obj_in);
- for (int i = self->len - 1; i >= 0; i--) {
- if (entries->fd == fd) {
- entries->fd = -1;
- if (self->obj_map) {
- self->obj_map[entries - self->entries] = MP_OBJ_NULL;
- }
- break;
- }
- entries++;
- }
-
- // TODO raise KeyError if obj didn't exist in map
- return mp_const_none;
-}
-MP_DEFINE_CONST_FUN_OBJ_2(poll_unregister_obj, poll_unregister);
-
-/// \method modify(obj, eventmask)
-STATIC mp_obj_t poll_modify(mp_obj_t self_in, mp_obj_t obj_in, mp_obj_t eventmask_in) {
- mp_obj_poll_t *self = MP_OBJ_TO_PTR(self_in);
- struct pollfd *entries = self->entries;
- int fd = get_fd(obj_in);
- for (int i = self->len - 1; i >= 0; i--) {
- if (entries->fd == fd) {
- entries->events = mp_obj_get_int(eventmask_in);
- break;
- }
- entries++;
- }
-
- // TODO raise KeyError if obj didn't exist in map
- return mp_const_none;
-}
-MP_DEFINE_CONST_FUN_OBJ_3(poll_modify_obj, poll_modify);
-
-STATIC int poll_poll_internal(size_t n_args, const mp_obj_t *args) {
- mp_obj_poll_t *self = MP_OBJ_TO_PTR(args[0]);
-
- // work out timeout (it's given already in ms)
- int timeout = -1;
- 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]);
- }
- }
-
- self->flags = flags;
-
- int n_ready = poll(self->entries, self->len, timeout);
- RAISE_ERRNO(n_ready, errno);
- return n_ready;
-}
-
-/// \method poll([timeout])
-/// Timeout is in milliseconds.
-STATIC mp_obj_t poll_poll(size_t n_args, const mp_obj_t *args) {
- int n_ready = poll_poll_internal(n_args, args);
-
- if (n_ready == 0) {
- return mp_const_empty_tuple;
- }
-
- mp_obj_poll_t *self = MP_OBJ_TO_PTR(args[0]);
-
- mp_obj_list_t *ret_list = MP_OBJ_TO_PTR(mp_obj_new_list(n_ready, NULL));
- int ret_i = 0;
- struct pollfd *entries = self->entries;
- for (int i = 0; i < self->len; i++, entries++) {
- if (entries->revents != 0) {
- mp_obj_tuple_t *t = MP_OBJ_TO_PTR(mp_obj_new_tuple(2, NULL));
- // If there's an object stored, return it, otherwise raw fd
- if (self->obj_map && self->obj_map[i] != MP_OBJ_NULL) {
- t->items[0] = self->obj_map[i];
- } else {
- t->items[0] = MP_OBJ_NEW_SMALL_INT(entries->fd);
- }
- t->items[1] = MP_OBJ_NEW_SMALL_INT(entries->revents);
- ret_list->items[ret_i++] = MP_OBJ_FROM_PTR(t);
- if (self->flags & FLAG_ONESHOT) {
- entries->events = 0;
- }
- }
- }
-
- return MP_OBJ_FROM_PTR(ret_list);
-}
-MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(poll_poll_obj, 1, 3, poll_poll);
-
-STATIC mp_obj_t poll_ipoll(size_t n_args, const mp_obj_t *args) {
- mp_obj_poll_t *self = MP_OBJ_TO_PTR(args[0]);
-
- if (self->ret_tuple == MP_OBJ_NULL) {
- self->ret_tuple = mp_obj_new_tuple(2, NULL);
- }
-
- int n_ready = poll_poll_internal(n_args, args);
- self->iter_cnt = n_ready;
- self->iter_idx = 0;
-
- return args[0];
-}
-MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(poll_ipoll_obj, 1, 3, poll_ipoll);
-
-STATIC mp_obj_t poll_iternext(mp_obj_t self_in) {
- mp_obj_poll_t *self = MP_OBJ_TO_PTR(self_in);
-
- if (self->iter_cnt == 0) {
- return MP_OBJ_STOP_ITERATION;
- }
-
- self->iter_cnt--;
-
- struct pollfd *entries = self->entries + self->iter_idx;
- for (int i = self->iter_idx; i < self->len; i++, entries++) {
- self->iter_idx++;
- if (entries->revents != 0) {
- mp_obj_tuple_t *t = MP_OBJ_TO_PTR(self->ret_tuple);
- // If there's an object stored, return it, otherwise raw fd
- if (self->obj_map && self->obj_map[i] != MP_OBJ_NULL) {
- t->items[0] = self->obj_map[i];
- } else {
- t->items[0] = MP_OBJ_NEW_SMALL_INT(entries->fd);
- }
- t->items[1] = MP_OBJ_NEW_SMALL_INT(entries->revents);
- if (self->flags & FLAG_ONESHOT) {
- entries->events = 0;
- }
- return MP_OBJ_FROM_PTR(t);
- }
- }
-
- assert(!"inconsistent number of poll active entries");
- self->iter_cnt = 0;
- return MP_OBJ_STOP_ITERATION;
-}
-
-STATIC const mp_rom_map_elem_t poll_locals_dict_table[] = {
- { MP_ROM_QSTR(MP_QSTR_register), MP_ROM_PTR(&poll_register_obj) },
- { MP_ROM_QSTR(MP_QSTR_unregister), MP_ROM_PTR(&poll_unregister_obj) },
- { MP_ROM_QSTR(MP_QSTR_modify), MP_ROM_PTR(&poll_modify_obj) },
- { MP_ROM_QSTR(MP_QSTR_poll), MP_ROM_PTR(&poll_poll_obj) },
- { MP_ROM_QSTR(MP_QSTR_ipoll), MP_ROM_PTR(&poll_ipoll_obj) },
-};
-STATIC MP_DEFINE_CONST_DICT(poll_locals_dict, poll_locals_dict_table);
-
-STATIC const mp_obj_type_t mp_type_poll = {
- { &mp_type_type },
- .name = MP_QSTR_poll,
- .getiter = mp_identity_getiter,
- .iternext = poll_iternext,
- .locals_dict = (void*)&poll_locals_dict,
-};
-
-STATIC mp_obj_t select_poll(size_t n_args, const mp_obj_t *args) {
- int alloc = 4;
- if (n_args > 0) {
- alloc = mp_obj_get_int(args[0]);
- }
- mp_obj_poll_t *poll = m_new_obj(mp_obj_poll_t);
- poll->base.type = &mp_type_poll;
- poll->entries = m_new(struct pollfd, alloc);
- poll->alloc = alloc;
- poll->len = 0;
- poll->obj_map = NULL;
- poll->iter_cnt = 0;
- poll->ret_tuple = MP_OBJ_NULL;
- return MP_OBJ_FROM_PTR(poll);
-}
-MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_select_poll_obj, 0, 1, select_poll);
-
-STATIC const mp_rom_map_elem_t mp_module_select_globals_table[] = {
- { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_uselect) },
- { MP_ROM_QSTR(MP_QSTR_poll), MP_ROM_PTR(&mp_select_poll_obj) },
- { MP_ROM_QSTR(MP_QSTR_POLLIN), MP_ROM_INT(POLLIN) },
- { MP_ROM_QSTR(MP_QSTR_POLLOUT), MP_ROM_INT(POLLOUT) },
- { MP_ROM_QSTR(MP_QSTR_POLLERR), MP_ROM_INT(POLLERR) },
- { MP_ROM_QSTR(MP_QSTR_POLLHUP), MP_ROM_INT(POLLHUP) },
-};
-
-STATIC MP_DEFINE_CONST_DICT(mp_module_select_globals, mp_module_select_globals_table);
-
-const mp_obj_module_t mp_module_uselect = {
- .base = { &mp_type_module },
- .globals = (mp_obj_dict_t*)&mp_module_select_globals,
-};
-
-#endif // MICROPY_PY_USELECT_POSIX
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