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/*

* This file is part of the MicroPython project, http://micropython.org/

*

* The MIT License (MIT)

*

* Copyright (c) 2017 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.

*/

#ifndef MICROPY_INCLUDED_STMHAL_PYBTHREAD_H

#define MICROPY_INCLUDED_STMHAL_PYBTHREAD_H

typedef struct _pyb_thread_t {

void *sp;

uint32_t local_state;

void *arg; // thread Python args, a GC root pointer

void *stack; // pointer to the stack

size_t stack_len; // number of words in the stack

uint32_t timeslice;

struct _pyb_thread_t *all_next;

struct _pyb_thread_t *run_prev;

struct _pyb_thread_t *run_next;

struct _pyb_thread_t *queue_next;

} pyb_thread_t;

typedef pyb_thread_t *pyb_mutex_t;

extern volatile int pyb_thread_enabled;

extern pyb_thread_t *volatile pyb_thread_all;

extern pyb_thread_t *volatile pyb_thread_cur;

void pyb_thread_init(pyb_thread_t *th);

void pyb_thread_deinit();

uint32_t pyb_thread_new(pyb_thread_t *th, void *stack, size_t stack_len, void *entry, void *arg);

void pyb_thread_dump(void);

static inline uint32_t pyb_thread_get_id(void) {

return (uint32_t)pyb_thread_cur;

}

static inline void pyb_thread_set_local(void *value) {

pyb_thread_cur->local_state = (uint32_t)value;

}

static inline void *pyb_thread_get_local(void) {

return (void*)pyb_thread_cur->local_state;

}

static inline void pyb_thread_yield(void) {

if (pyb_thread_cur->run_next == pyb_thread_cur) {

__WFI();

} else {

SCB->ICSR = SCB_ICSR_PENDSVSET_Msk;

}

}

void pyb_mutex_init(pyb_mutex_t *m);

int pyb_mutex_lock(pyb_mutex_t *m, int wait);

void pyb_mutex_unlock(pyb_mutex_t *m);

#endif // MICROPY_INCLUDED_STMHAL_PYBTHREAD_H