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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2020-2021 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 "py/runtime.h"
#include "py/gc.h"
#include "py/mpthread.h"
#include "pico/stdlib.h"
#include "pico/multicore.h"
#if MICROPY_PY_THREAD
extern uint8_t __StackTop, __StackBottom;
void *core_state[2];
STATIC void *(*core1_entry)(void *) = NULL;
STATIC void *core1_arg = NULL;
STATIC uint32_t *core1_stack = NULL;
STATIC size_t core1_stack_num_words = 0;
void mp_thread_init(void) {
mp_thread_set_state(&mp_state_ctx.thread);
core1_entry = NULL;
}
void mp_thread_gc_others(void) {
if (get_core_num() == 0) {
// GC running on core0, trace core1's stack, if it's running.
if (core1_entry != NULL) {
gc_collect_root((void **)core1_stack, core1_stack_num_words);
}
} else {
// GC running on core1, trace core0's stack.
gc_collect_root((void **)&__StackBottom, (&__StackTop - &__StackBottom) / sizeof(uintptr_t));
}
}
STATIC void core1_entry_wrapper(void) {
if (core1_entry) {
core1_entry(core1_arg);
}
core1_entry = NULL;
// returning from here will loop the core forever (WFI)
}
void mp_thread_create(void *(*entry)(void *), void *arg, size_t *stack_size) {
// Check if core1 is already in use.
if (core1_entry != NULL) {
mp_raise_msg(&mp_type_OSError, MP_ERROR_TEXT("core1 in use"));
}
core1_entry = entry;
core1_arg = arg;
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.
core1_stack_num_words = *stack_size / sizeof(uint32_t);
*stack_size = core1_stack_num_words * sizeof(uint32_t);
// Allocate stack.
core1_stack = m_new(uint32_t, core1_stack_num_words);
// Create thread on core1.
multicore_reset_core1();
multicore_launch_core1_with_stack(core1_entry_wrapper, core1_stack, *stack_size);
// Adjust stack_size to provide room to recover from hitting the limit.
*stack_size -= 512;
}
void mp_thread_start(void) {
}
void mp_thread_finish(void) {
}
#endif // MICROPY_PY_THREAD
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