58 lines
2.1 KiB
C
58 lines
2.1 KiB
C
/*
|
|
* This file is part of the MicroPython project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* SPDX-FileCopyrightText: 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.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
|
|
#include "py/runtime.h"
|
|
|
|
#if MICROPY_ENABLE_PYSTACK
|
|
|
|
void mp_pystack_init(void *start, void *end) {
|
|
MP_STATE_THREAD(pystack_start) = start;
|
|
MP_STATE_THREAD(pystack_end) = end;
|
|
MP_STATE_THREAD(pystack_cur) = start;
|
|
}
|
|
|
|
void *mp_pystack_alloc(size_t n_bytes) {
|
|
n_bytes = (n_bytes + (MICROPY_PYSTACK_ALIGN - 1)) & ~(MICROPY_PYSTACK_ALIGN - 1);
|
|
#if MP_PYSTACK_DEBUG
|
|
n_bytes += MICROPY_PYSTACK_ALIGN;
|
|
#endif
|
|
if (MP_STATE_THREAD(pystack_cur) + n_bytes > MP_STATE_THREAD(pystack_end)) {
|
|
// out of memory in the pystack
|
|
mp_raise_arg1(&mp_type_RuntimeError,
|
|
MP_OBJ_NEW_QSTR(MP_QSTR_pystack_space_exhausted));
|
|
}
|
|
void *ptr = MP_STATE_THREAD(pystack_cur);
|
|
MP_STATE_THREAD(pystack_cur) += n_bytes;
|
|
#if MP_PYSTACK_DEBUG
|
|
*(size_t *)(MP_STATE_THREAD(pystack_cur) - MICROPY_PYSTACK_ALIGN) = n_bytes;
|
|
#endif
|
|
return ptr;
|
|
}
|
|
|
|
#endif
|