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       1                 :            : /*
       2                 :            :  * This file is part of the MicroPython project, http://micropython.org/
       3                 :            :  *
       4                 :            :  * The MIT License (MIT)
       5                 :            :  *
       6                 :            :  * Copyright (c) 2014 Paul Sokolovsky
       7                 :            :  * Copryight (c) 2024 Angus Gratton
       8                 :            :  *
       9                 :            :  * Permission is hereby granted, free of charge, to any person obtaining a copy
      10                 :            :  * of this software and associated documentation files (the "Software"), to deal
      11                 :            :  * in the Software without restriction, including without limitation the rights
      12                 :            :  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
      13                 :            :  * copies of the Software, and to permit persons to whom the Software is
      14                 :            :  * furnished to do so, subject to the following conditions:
      15                 :            :  *
      16                 :            :  * The above copyright notice and this permission notice shall be included in
      17                 :            :  * all copies or substantial portions of the Software.
      18                 :            :  *
      19                 :            :  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
      20                 :            :  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
      21                 :            :  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
      22                 :            :  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
      23                 :            :  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
      24                 :            :  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
      25                 :            :  * THE SOFTWARE.
      26                 :            :  */
      27                 :            : 
      28                 :            : #include "py/runtime.h"
      29                 :            : #include "py/cstack.h"
      30                 :            : 
      31                 :       3420 : void mp_cstack_init_with_sp_here(size_t stack_size) {
      32                 :            :     #if __GNUC__ >= 13
      33                 :            :     #pragma GCC diagnostic push
      34                 :            :     #pragma GCC diagnostic ignored "-Wdangling-pointer"
      35                 :            :     #endif
      36                 :       3420 :     volatile int stack_dummy;
      37                 :       3420 :     mp_cstack_init_with_top((void *)&stack_dummy, stack_size);
      38                 :            :     #if __GNUC__ >= 13
      39                 :            :     #pragma GCC diagnostic pop
      40                 :            :     #endif
      41                 :       3420 : }
      42                 :            : 
      43                 :   10913689 : mp_uint_t mp_cstack_usage(void) {
      44                 :            :     // Assumes descending stack
      45                 :   10913689 :     volatile int stack_dummy;
      46                 :   10913689 :     return MP_STATE_THREAD(stack_top) - (char *)&stack_dummy;
      47                 :            : }
      48                 :            : 
      49                 :            : #if MICROPY_STACK_CHECK
      50                 :            : 
      51                 :   10744665 : void mp_cstack_check(void) {
      52         [ +  + ]:   10744665 :     if (mp_cstack_usage() >= MP_STATE_THREAD(stack_limit)) {
      53                 :         23 :         mp_raise_recursion_depth();
      54                 :            :     }
      55                 :   10773601 : }
      56                 :            : 
      57                 :            : #endif // MICROPY_STACK_CHECK