diff options
author | Damien George <damien.p.george@gmail.com> | 2016-04-22 22:52:33 +0000 |
---|---|---|
committer | Damien George <damien.p.george@gmail.com> | 2016-06-28 11:28:48 +0100 |
commit | 27cc07721b3c3c2d0b9c8678c8a3ddc7fe96cd97 (patch) | |
tree | 38016a7b7e2f29c615bfc0dc14261b8ec0bf0173 /py/modthread.c | |
parent | 330165a2cc9a0d4d5d00f13f851412c25d5f4ed2 (diff) |
py: Add basic _thread module, with ability to start a new thread.
Diffstat (limited to 'py/modthread.c')
-rw-r--r-- | py/modthread.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/py/modthread.c b/py/modthread.c new file mode 100644 index 000000000..5104ef127 --- /dev/null +++ b/py/modthread.c @@ -0,0 +1,148 @@ +/* + * 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 |