del useless moduselect.c

port/moduselect.c

@@ -1,378 +0,0 @@
-/*
- * This file is part of the MicroPython project, http://micropython.org/
- *
- * The MIT License (MIT)
- *
- * Copyright (c) 2014 Damien P. George
- *
- * 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
-
-#include <stdio.h>
-
-#include "py/runtime.h"
-#include "py/obj.h"
-#include "py/objlist.h"
-#include "py/stream.h"
-#include "py/mperrno.h"
-#include "py/mphal.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.
-
-typedef struct _poll_obj_t {
-    mp_obj_t obj;
-    mp_uint_t (*ioctl)(mp_obj_t obj, mp_uint_t request, mp_uint_t arg, int *errcode);
-    mp_uint_t flags;
-    mp_uint_t flags_ret;
-} poll_obj_t;
-
-STATIC void poll_map_add(mp_map_t *poll_map, const mp_obj_t *obj, mp_uint_t obj_len, mp_uint_t flags, bool or_flags) {
-    for (mp_uint_t i = 0; i < obj_len; i++) {
-        mp_map_elem_t *elem = mp_map_lookup(poll_map, mp_obj_id(obj[i]), MP_MAP_LOOKUP_ADD_IF_NOT_FOUND);
-        if (elem->value == NULL) {
-            // object not found; get its ioctl and add it to the poll list
-            const mp_stream_p_t *stream_p = mp_get_stream_raise(obj[i], MP_STREAM_OP_IOCTL);
-            poll_obj_t *poll_obj = m_new_obj(poll_obj_t);
-            poll_obj->obj = obj[i];
-            poll_obj->ioctl = stream_p->ioctl;
-            poll_obj->flags = flags;
-            poll_obj->flags_ret = 0;
-            elem->value = poll_obj;
-        } else {
-            // object exists; update its flags
-            if (or_flags) {
-                ((poll_obj_t*)elem->value)->flags |= flags;
-            } else {
-                ((poll_obj_t*)elem->value)->flags = flags;
-            }
-        }
-    }
-}
-
-// poll each object in the map
-STATIC mp_uint_t poll_map_poll(mp_map_t *poll_map, mp_uint_t *rwx_num) {
-    mp_uint_t n_ready = 0;
-    for (mp_uint_t i = 0; i < poll_map->alloc; ++i) {
-        if (!MP_MAP_SLOT_IS_FILLED(poll_map, i)) {
-            continue;
-        }
-
-        poll_obj_t *poll_obj = (poll_obj_t*)poll_map->table[i].value;
-        int errcode;
-        mp_int_t ret = poll_obj->ioctl(poll_obj->obj, MP_STREAM_POLL, poll_obj->flags, &errcode);
-        poll_obj->flags_ret = ret;
-
-        if (ret == -1) {
-            // error doing ioctl
-            mp_raise_OSError(errcode);
-        }
-
-        if (ret != 0) {
-            // object is ready
-            n_ready += 1;
-            if (rwx_num != NULL) {
-                if (ret & MP_STREAM_POLL_RD) {
-                    rwx_num[0] += 1;
-                }
-                if (ret & MP_STREAM_POLL_WR) {
-                    rwx_num[1] += 1;
-                }
-                if ((ret & ~(MP_STREAM_POLL_RD | MP_STREAM_POLL_WR)) != 0) {
-                    rwx_num[2] += 1;
-                }
-            }
-        }
-    }
-    return n_ready;
-}
-
-/// \function select(rlist, wlist, xlist[, timeout])
-STATIC mp_obj_t select_select(uint n_args, const mp_obj_t *args) {
-    // get array data from tuple/list arguments
-    size_t rwx_len[3];
-    mp_obj_t *r_array, *w_array, *x_array;
-    mp_obj_get_array(args[0], &rwx_len[0], &r_array);
-    mp_obj_get_array(args[1], &rwx_len[1], &w_array);
-    mp_obj_get_array(args[2], &rwx_len[2], &x_array);
-
-    // get timeout
-    mp_uint_t timeout = -1;
-    if (n_args == 4) {
-        if (args[3] != mp_const_none) {
-            #if MICROPY_PY_BUILTINS_FLOAT
-            float timeout_f = mp_obj_get_float(args[3]);
-            if (timeout_f >= 0) {
-                timeout = (mp_uint_t)(timeout_f * 1000);
-            }
-            #else
-            timeout = mp_obj_get_int(args[3]) * 1000;
-            #endif
-        }
-    }
-
-    // merge separate lists and get the ioctl function for each object
-    mp_map_t poll_map;
-    mp_map_init(&poll_map, rwx_len[0] + rwx_len[1] + rwx_len[2]);
-    poll_map_add(&poll_map, r_array, rwx_len[0], MP_STREAM_POLL_RD, true);
-    poll_map_add(&poll_map, w_array, rwx_len[1], MP_STREAM_POLL_WR, true);
-    poll_map_add(&poll_map, x_array, rwx_len[2], MP_STREAM_POLL_ERR | MP_STREAM_POLL_HUP, true);
-
-    mp_uint_t start_tick = mp_hal_ticks_ms();
-    rwx_len[0] = rwx_len[1] = rwx_len[2] = 0;
-    for (;;) {
-        // poll the objects
-        mp_uint_t n_ready = poll_map_poll(&poll_map, rwx_len);
-
-        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_t list_array[3];
-            list_array[0] = mp_obj_new_list(rwx_len[0], NULL);
-            list_array[1] = mp_obj_new_list(rwx_len[1], NULL);
-            list_array[2] = mp_obj_new_list(rwx_len[2], NULL);
-            rwx_len[0] = rwx_len[1] = rwx_len[2] = 0;
-            for (mp_uint_t i = 0; i < poll_map.alloc; ++i) {
-                if (!MP_MAP_SLOT_IS_FILLED(&poll_map, i)) {
-                    continue;
-                }
-                poll_obj_t *poll_obj = (poll_obj_t*)poll_map.table[i].value;
-                if (poll_obj->flags_ret & MP_STREAM_POLL_RD) {
-                    ((mp_obj_list_t*)list_array[0])->items[rwx_len[0]++] = poll_obj->obj;
-                }
-                if (poll_obj->flags_ret & MP_STREAM_POLL_WR) {
-                    ((mp_obj_list_t*)list_array[1])->items[rwx_len[1]++] = poll_obj->obj;
-                }
-                if ((poll_obj->flags_ret & ~(MP_STREAM_POLL_RD | MP_STREAM_POLL_WR)) != 0) {
-                    ((mp_obj_list_t*)list_array[2])->items[rwx_len[2]++] = poll_obj->obj;
-                }
-            }
-            mp_map_deinit(&poll_map);
-            return mp_obj_new_tuple(3, list_array);
-        }
-        MICROPY_EVENT_POLL_HOOK
-    }
-}
-MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_select_select_obj, 3, 4, select_select);
-
-/// \class Poll - poll class
-
-typedef struct _mp_obj_poll_t {
-    mp_obj_base_t base;
-    mp_map_t poll_map;
-    short iter_cnt;
-    short iter_idx;
-    int flags;
-    // callee-owned tuple
-    mp_obj_t ret_tuple;
-} mp_obj_poll_t;
-
-/// \method register(obj[, eventmask])
-STATIC mp_obj_t poll_register(uint n_args, const mp_obj_t *args) {
-    mp_obj_poll_t *self = args[0];
-    mp_uint_t flags;
-    if (n_args == 3) {
-        flags = mp_obj_get_int(args[2]);
-    } else {
-        flags = MP_STREAM_POLL_RD | MP_STREAM_POLL_WR;
-    }
-    poll_map_add(&self->poll_map, &args[1], 1, flags, false);
-    return mp_const_none;
-}
-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 = self_in;
-    mp_map_lookup(&self->poll_map, mp_obj_id(obj_in), MP_MAP_LOOKUP_REMOVE_IF_FOUND);
-    // 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 = self_in;
-    mp_map_elem_t *elem = mp_map_lookup(&self->poll_map, mp_obj_id(obj_in), MP_MAP_LOOKUP);
-    if (elem == NULL) {
-        mp_raise_OSError(MP_ENOENT);
-    }
-    ((poll_obj_t*)elem->value)->flags = mp_obj_get_int(eventmask_in);
-    return mp_const_none;
-}
-MP_DEFINE_CONST_FUN_OBJ_3(poll_modify_obj, poll_modify);
-
-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)
-    mp_uint_t 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;
-
-    mp_uint_t start_tick = mp_hal_ticks_ms();
-    mp_uint_t n_ready;
-    for (;;) {
-        // poll the objects
-        n_ready = poll_map_poll(&self->poll_map, NULL);
-        if (n_ready > 0 || (timeout != -1 && mp_hal_ticks_ms() - start_tick >= timeout)) {
-            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);
-
-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--;
-
-    for (mp_uint_t i = self->iter_idx; i < self->poll_map.alloc; ++i) {
-        self->iter_idx++;
-        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_tuple_t *t = MP_OBJ_TO_PTR(self->ret_tuple);
-            t->items[0] = poll_obj->obj;
-            t->items[1] = MP_OBJ_NEW_SMALL_INT(poll_obj->flags_ret);
-            if (self->flags & FLAG_ONESHOT) {
-                // Don't poll next time, until new event flags will be set explicitly
-                poll_obj->flags = 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,
-};
-
-/// \function poll()
-STATIC mp_obj_t select_poll(void) {
-    mp_obj_poll_t *poll = m_new_obj(mp_obj_poll_t);
-    poll->base.type = &mp_type_poll;
-    mp_map_init(&poll->poll_map, 0);
-    poll->iter_cnt = 0;
-    poll->ret_tuple = MP_OBJ_NULL;
-    return poll;
-}
-MP_DEFINE_CONST_FUN_OBJ_0(mp_select_poll_obj, 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_select), MP_ROM_PTR(&mp_select_select_obj) },
-    { MP_ROM_QSTR(MP_QSTR_poll), MP_ROM_PTR(&mp_select_poll_obj) },
-    { MP_ROM_QSTR(MP_QSTR_POLLIN), MP_ROM_INT(MP_STREAM_POLL_RD) },
-    { MP_ROM_QSTR(MP_QSTR_POLLOUT), MP_ROM_INT(MP_STREAM_POLL_WR) },
-    { MP_ROM_QSTR(MP_QSTR_POLLERR), MP_ROM_INT(MP_STREAM_POLL_ERR) },
-    { MP_ROM_QSTR(MP_QSTR_POLLHUP), MP_ROM_INT(MP_STREAM_POLL_HUP) },
-};
-
-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