225 lines
6.6 KiB
C
225 lines
6.6 KiB
C
/*
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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) 2022 KY-zhang-X
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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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#include "py/mpthread.h"
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#include "py/gc.h"
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#include "py/runtime.h"
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#include "tos_k.h"
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#if MICROPY_PY_THREAD
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#define MP_THREAD_MIN_STACK_SIZE (2 * 1024)
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#define MP_THREAD_DEFAULT_STACK_SIZE (4 * 1024)
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// this structure form a linked list, one node per active thread
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typedef struct _mp_thread_t {
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k_task_t *id;
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int ready;
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void *arg;
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void *stack;
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size_t stack_len;
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struct _mp_thread_t *next;
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void *data;
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} mp_thread_t;
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// the mutex controls access to the linked list
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STATIC mp_thread_mutex_t thread_mutex;
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STATIC mp_thread_t thread_entry0;
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STATIC mp_thread_t *thread = NULL;
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void mp_thread_init(void)
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{
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mp_thread_mutex_init(&thread_mutex);
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// create first entry in linked list of all threads
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thread = &thread_entry0;
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thread->id = tos_task_curr_task_get();
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thread->ready = 1;
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thread->arg = NULL;
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thread->stack = thread->id->stk_base;
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thread->stack_len = thread->id->stk_size / sizeof(uintptr_t);
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thread->next = NULL;
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// mp_thread_set_state(&mp_state_ctx.thread)
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thread->data = &mp_state_ctx.thread;
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}
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void mp_thread_gc_others(void)
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{
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mp_thread_mutex_lock(&thread_mutex, 1);
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for (mp_thread_t *th = thread; th != NULL; th = th->next) {
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gc_collect_root((void **)&th, 1);
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gc_collect_root(&th->arg, 1);
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gc_collect_root(&th->stack, 1);
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if (th->id != tos_task_curr_task_get() && th->ready) {
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gc_collect_root(th->stack, th->stack_len);
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}
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}
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mp_thread_mutex_unlock(&thread_mutex);
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}
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void mp_thread_deinit(void)
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{
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for (;;) {
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k_task_t *id = NULL;
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mp_thread_mutex_lock(&thread_mutex, 1);
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for (mp_thread_t *th = thread; th != NULL; th = th->next) {
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if (th->id != tos_task_curr_task_get()) {
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id = th->id;
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break;
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}
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}
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mp_thread_mutex_unlock(&thread_mutex);
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if (id == NULL) {
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break;
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} else {
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tos_task_destroy(id);
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}
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}
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}
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void mp_thread_set_state(mp_state_thread_t *state)
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{
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mp_thread_mutex_lock(&thread_mutex, 1);
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k_task_t *id = tos_task_curr_task_get();
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for (mp_thread_t *th = thread; th != NULL; th = th->next) {
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if (th->id == id) {
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th->data = (void *)state;
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break;
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}
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}
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mp_thread_mutex_unlock(&thread_mutex);
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}
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mp_state_thread_t *mp_thread_get_state(void)
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{
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mp_thread_mutex_lock(&thread_mutex, 1);
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k_task_t *id = tos_task_curr_task_get();
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for (mp_thread_t *th = thread; th != NULL; th = th->next) {
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if (th->id == id) {
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mp_thread_mutex_unlock(&thread_mutex);
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return (mp_state_thread_t *)th->data;
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}
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}
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mp_thread_mutex_unlock(&thread_mutex);
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return NULL;
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}
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void mp_thread_create_ex(void *(*entry)(void *), void *arg, size_t *stack_size, int priority, char *name) {
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if (*stack_size == 0) {
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*stack_size = MP_THREAD_DEFAULT_STACK_SIZE;
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} else if (*stack_size < MP_THREAD_MIN_STACK_SIZE) {
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*stack_size = MP_THREAD_MIN_STACK_SIZE;
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}
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// Allocate linked-list node (must be outside thread_mutex lock)
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mp_thread_t *th = m_new_obj(mp_thread_t);
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mp_thread_mutex_lock(&thread_mutex, 1);
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// create thread
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k_err_t ret = tos_task_create_dyn(&th->id, name, (k_task_entry_t)entry, arg, priority, *stack_size, 0);
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if (ret != K_ERR_NONE) {
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mp_thread_mutex_unlock(&thread_mutex);
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mp_raise_msg(&mp_type_OSError, MP_ERROR_TEXT("can't create thread"));
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}
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// add thread to linked list of all threads
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th->ready = 0;
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th->arg = arg;
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th->stack = th->id->stk_base;
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th->stack_len = *stack_size / sizeof(uintptr_t);
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th->next = thread;
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thread = th;
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// adjust the stack_size to provide room to recover from hitting the limit
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*stack_size -= MP_THREAD_STACK_LIMIT_MARGIN;
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mp_thread_mutex_unlock(&thread_mutex);
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}
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void mp_thread_create(void *(*entry)(void *), void *arg, size_t *stack_size)
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{
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int priority = tos_task_curr_task_get()->prio;
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if (priority > 0) {
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// subthread has higher priority
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priority -= 1;
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}
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mp_thread_create_ex(entry, arg, stack_size, priority, "mp_thread");
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}
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void mp_thread_start(void)
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{
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mp_thread_mutex_lock(&thread_mutex, 1);
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for (mp_thread_t *th = thread; th != NULL; th = th->next) {
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if (th->id == tos_task_curr_task_get()) {
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th->ready = 1;
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break;
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}
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}
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mp_thread_mutex_unlock(&thread_mutex);
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}
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void mp_thread_finish(void)
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{
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mp_thread_mutex_lock(&thread_mutex, 1);
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for (mp_thread_t *th = thread, *prev = NULL; th != NULL; prev = th, th = th->next) {
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if (th->id == tos_task_curr_task_get()) {
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if (prev != NULL) {
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prev->next = th->next;
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} else {
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thread = th->next;
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}
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th->ready = 0;
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m_del_obj(mp_thread_t, th);
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break;
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}
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}
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mp_thread_mutex_unlock(&thread_mutex);
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tos_task_destroy_dyn(NULL);
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}
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void mp_thread_mutex_init(mp_thread_mutex_t *mutex)
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{
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// TODO return value
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tos_mutex_create(mutex);
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}
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int mp_thread_mutex_lock(mp_thread_mutex_t *mutex, int wait)
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{
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return K_ERR_NONE == tos_mutex_pend_timed(mutex, wait ? TOS_TIME_FOREVER : TOS_TIME_NOWAIT);
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}
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void mp_thread_mutex_unlock(mp_thread_mutex_t *mutex)
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{
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tos_mutex_post(mutex);
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}
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#endif /* MICROPY_PY_THREAD */
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