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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2016 Damien P. George on behalf of Pycom Ltd
*
* 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 <stdio.h>
#include <string.h>
#include "py/runtime.h"
#include "py/stackctrl.h"
#if MICROPY_PY_THREAD
#include "py/mpthread.h"
#if 0 // print debugging info
#define DEBUG_PRINT (1)
#define DEBUG_printf DEBUG_printf
#else // don't print debugging info
#define DEBUG_PRINT (0)
#define DEBUG_printf(...) (void)0
#endif
/****************************************************************/
// _thread module
STATIC mp_obj_t mod_thread_get_ident(void) {
return mp_obj_new_int_from_uint((uintptr_t)mp_thread_get_state());
}
STATIC MP_DEFINE_CONST_FUN_OBJ_0(mod_thread_get_ident_obj, mod_thread_get_ident);
typedef struct _thread_entry_args_t {
mp_obj_t fun;
size_t n_args;
size_t n_kw;
const mp_obj_t *args;
} thread_entry_args_t;
STATIC void *thread_entry(void *args_in) {
thread_entry_args_t *args = (thread_entry_args_t*)args_in;
mp_state_thread_t ts;
mp_thread_set_state(&ts);
mp_stack_set_top(&ts + 1); // need to include ts in root-pointer scan
mp_stack_set_limit(16 * 1024); // fixed stack limit for now
// TODO set more thread-specific state here:
// mp_pending_exception? (root pointer)
// cur_exception (root pointer)
// dict_locals? (root pointer) uPy doesn't make a new locals dict for functions, just for classes, so it's different to CPy
DEBUG_printf("[thread] start ts=%p args=%p stack=%p\n", &ts, &args, MP_STATE_THREAD(stack_top));
nlr_buf_t nlr;
if (nlr_push(&nlr) == 0) {
mp_call_function_n_kw(args->fun, args->n_args, args->n_kw, args->args);
nlr_pop();
} else {
// uncaught exception
// check for SystemExit
if (mp_obj_is_subclass_fast(mp_obj_get_type((mp_obj_t)nlr.ret_val), &mp_type_SystemExit)) {
// swallow exception silently
} else {
// print exception out
mp_printf(&mp_plat_print, "Unhandled exception in thread started by ");
mp_obj_print_helper(&mp_plat_print, args->fun, PRINT_REPR);
mp_printf(&mp_plat_print, "\n");
mp_obj_print_exception(&mp_plat_print, (mp_obj_t)nlr.ret_val);
}
}
DEBUG_printf("[thread] finish ts=%p\n", &ts);
return NULL;
}
STATIC mp_obj_t mod_thread_start_new_thread(size_t n_args, const mp_obj_t *args) {
mp_uint_t pos_args_len;
mp_obj_t *pos_args_items;
mp_obj_get_array(args[1], &pos_args_len, &pos_args_items);
thread_entry_args_t *th_args = m_new_obj(thread_entry_args_t);
th_args->fun = args[0];
if (n_args == 2) {
// just position arguments
th_args->n_args = pos_args_len;
th_args->n_kw = 0;
th_args->args = pos_args_items;
} else {
// positional and keyword arguments
if (mp_obj_get_type(args[2]) != &mp_type_dict) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_TypeError, "expecting a dict for keyword args"));
}
mp_map_t *map = &((mp_obj_dict_t*)MP_OBJ_TO_PTR(args[2]))->map;
th_args->n_args = pos_args_len;
th_args->n_kw = map->used;
mp_obj_t *all_args = m_new(mp_obj_t, th_args->n_args + 2 * th_args->n_kw);
memcpy(all_args, pos_args_items, pos_args_len * sizeof(mp_obj_t));
for (size_t i = 0, n = pos_args_len; i < map->alloc; ++i) {
if (MP_MAP_SLOT_IS_FILLED(map, i)) {
all_args[n++] = map->table[i].key;
all_args[n++] = map->table[i].value;
}
}
th_args->args = all_args;
}
// TODO implement setting thread stack size
mp_thread_create(thread_entry, th_args);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_thread_start_new_thread_obj, 2, 3, mod_thread_start_new_thread);
STATIC const mp_rom_map_elem_t mp_module_thread_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR__thread) },
{ MP_ROM_QSTR(MP_QSTR_get_ident), MP_ROM_PTR(&mod_thread_get_ident_obj) },
{ MP_ROM_QSTR(MP_QSTR_start_new_thread), MP_ROM_PTR(&mod_thread_start_new_thread_obj) },
};
STATIC MP_DEFINE_CONST_DICT(mp_module_thread_globals, mp_module_thread_globals_table);
const mp_obj_module_t mp_module_thread = {
.base = { &mp_type_module },
.name = MP_QSTR__thread,
.globals = (mp_obj_dict_t*)&mp_module_thread_globals,
};
#endif // MICROPY_PY_THREAD
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