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/*

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

*

* The MIT License (MIT)

*

* Copyright (c) 2014 Paul Sokolovsky

* Copyright (c) 2024 Angus Gratton

*

* 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_PY_CSTACK_H

#define MICROPY_INCLUDED_PY_CSTACK_H

#include "py/mpstate.h"

// Both init functions below accept the full stack size. Set the

// MICROPY_STACK_CHECK_MARGIN to the number of bytes subtracted to account

// for stack usage between checks.

void mp_cstack_init_with_sp_here(size_t stack_size);

inline static void mp_cstack_init_with_top(void *top, size_t stack_size) {

MP_STATE_THREAD(stack_top) = (char *)top;

#if MICROPY_STACK_CHECK

assert(stack_size > MICROPY_STACK_CHECK_MARGIN); // Should be enforced by port

MP_STATE_THREAD(stack_limit) = stack_size - MICROPY_STACK_CHECK_MARGIN;

#else

(void)stack_size;

#endif

}

mp_uint_t mp_cstack_usage(void);

#if MICROPY_STACK_CHECK

void mp_cstack_check(void);

#else

inline static void mp_cstack_check(void) {

// No-op when stack checking is disabled

}

#endif

#endif // MICROPY_INCLUDED_PY_CSTACK_H