111 lines
3.4 KiB
C
111 lines
3.4 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) 2020-2021 Damien P. George
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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/runtime.h"
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#include "py/gc.h"
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#include "py/mpthread.h"
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#include "pico/stdlib.h"
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#include "pico/multicore.h"
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#if MICROPY_PY_THREAD
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extern uint8_t __StackTop, __StackBottom;
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void *core_state[2];
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STATIC void *(*core1_entry)(void *) = NULL;
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STATIC void *core1_arg = NULL;
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STATIC uint32_t *core1_stack = NULL;
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STATIC size_t core1_stack_num_words = 0;
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void mp_thread_init(void) {
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mp_thread_set_state(&mp_state_ctx.thread);
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core1_entry = NULL;
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}
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void mp_thread_deinit(void) {
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multicore_reset_core1();
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core1_entry = NULL;
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}
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void mp_thread_gc_others(void) {
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if (core1_entry != NULL) {
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// Collect core1's stack if it is active.
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gc_collect_root((void **)&core1_stack, 1);
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gc_collect_root((void **)&core1_arg, 1);
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}
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if (get_core_num() == 1) {
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// GC running on core1, trace core0's stack.
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gc_collect_root((void **)&__StackBottom, (&__StackTop - &__StackBottom) / sizeof(uintptr_t));
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}
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}
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STATIC void core1_entry_wrapper(void) {
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if (core1_entry) {
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core1_entry(core1_arg);
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}
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core1_entry = NULL;
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// returning from here will loop the core forever (WFI)
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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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// Check if core1 is already in use.
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if (core1_entry != NULL) {
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mp_raise_msg(&mp_type_OSError, MP_ERROR_TEXT("core1 in use"));
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}
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core1_entry = entry;
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core1_arg = arg;
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if (*stack_size == 0) {
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*stack_size = 4096; // default stack size
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} else if (*stack_size < 2048) {
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*stack_size = 2048; // minimum stack size
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}
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// Round stack size to a multiple of the word size.
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core1_stack_num_words = *stack_size / sizeof(uint32_t);
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*stack_size = core1_stack_num_words * sizeof(uint32_t);
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// Allocate stack.
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core1_stack = m_new(uint32_t, core1_stack_num_words);
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// Create thread on core1.
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multicore_reset_core1();
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multicore_launch_core1_with_stack(core1_entry_wrapper, core1_stack, *stack_size);
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// Adjust stack_size to provide room to recover from hitting the limit.
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*stack_size -= 512;
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}
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void mp_thread_start(void) {
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}
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void mp_thread_finish(void) {
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}
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#endif // MICROPY_PY_THREAD
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