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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
*
* 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 "py/runtime.h"
#include "py/gc.h"
#include "py/mpthread.h"
#include "gccollect.h"
#if MICROPY_PY_THREAD
// the mutex controls access to the linked list
STATIC mp_thread_mutex_t thread_mutex;
void mp_thread_init(void) {
mp_thread_mutex_init(&thread_mutex);
mp_thread_set_state(&mp_state_ctx.thread);
}
void mp_thread_gc_others(void) {
mp_thread_mutex_lock(&thread_mutex, 1);
for (pyb_thread_t *th = pyb_thread_all; th != NULL; th = th->all_next) {
gc_collect_root((void**)&th, 1);
gc_collect_root(&th->arg, 1);
gc_collect_root(&th->stack, 1);
if (th != pyb_thread_cur) {
gc_collect_root(th->stack, th->stack_len);
}
}
mp_thread_mutex_unlock(&thread_mutex);
}
void mp_thread_create(void *(*entry)(void*), void *arg, size_t *stack_size) {
if (*stack_size == 0) {
*stack_size = 4096; // default stack size
} else if (*stack_size < 2048) {
*stack_size = 2048; // minimum stack size
}
// round stack size to a multiple of the word size
size_t stack_len = *stack_size / sizeof(uint32_t);
*stack_size = stack_len * sizeof(uint32_t);
// allocate stack and linked-list node (must be done outside thread_mutex lock)
uint32_t *stack = m_new(uint32_t, stack_len);
pyb_thread_t *th = m_new_obj(pyb_thread_t);
mp_thread_mutex_lock(&thread_mutex, 1);
// create thread
uint32_t id = pyb_thread_new(th, stack, stack_len, entry, arg);
if (id == 0) {
mp_thread_mutex_unlock(&thread_mutex);
mp_raise_msg(&mp_type_OSError, "can't create thread");
}
mp_thread_mutex_unlock(&thread_mutex);
// adjust stack_size to provide room to recover from hitting the limit
*stack_size -= 1024;
}
void mp_thread_start(void) {
}
void mp_thread_finish(void) {
}
#endif // MICROPY_PY_THREAD
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