memory.h

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//   Copyright 2016-2023 Jean-Francois Poilpret
//
//   Licensed under the Apache License, Version 2.0 (the "License");
//   you may not use this file except in compliance with the License.
//   You may obtain a copy of the License at
//
//       http://www.apache.org/licenses/LICENSE-2.0
//
//   Unless required by applicable law or agreed to in writing, software
//   distributed under the License is distributed on an "AS IS" BASIS,
//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//   See the License for the specific language governing permissions and
//   limitations under the License.
 
 
#ifndef MEMORY_H
#define MEMORY_H
 
#include <stdint.h>
#include "gpio.h"
 
extern int __heap_start;
extern int* __brkval;
 
namespace memory
{
    int free_mem()
    {
        int v;
        return (int) &v - (__brkval == nullptr ? (int) &__heap_start : (int) __brkval);
    }
 
    bool check_mem(int minimum)
    {
        return free_mem() > minimum;
    }
 
    void alert_mem(int minimum)
    {
        if (check_mem(minimum))
            gpio::FastPinType<board::DigitalPin::LED>::clear();
        else
            gpio::FastPinType<board::DigitalPin::LED>::set();
    }
}
 
#endif /* MEMORY_H */