// Nguyen Hong Anh - CT050104

// Declare custom malloc function
void* malloc(size_t size);

void setup() {
    Serial.begin(115200);

    Serial.println("Starting setup...");

    char *s;
    s = (char*) malloc(30 * sizeof(char)); // Allocate memory

    size_t freeHeapSize = xPortGetFreeHeapSize();
    size_t minimumEverFreeHeapSize = xPortGetMinimumEverFreeHeapSize();

    Serial.print("Initial free heap size: ");
    Serial.println(freeHeapSize);

    Serial.print("Initial minimum ever free heap size: ");
    Serial.println(minimumEverFreeHeapSize);

    if (s) {
        freeHeapSize = xPortGetFreeHeapSize();
        Serial.print("Free heap size after allocation: ");
        Serial.println(freeHeapSize); // Print free heap size after allocation

        minimumEverFreeHeapSize = xPortGetMinimumEverFreeHeapSize();
        Serial.print("Minimum ever free heap size after allocation: ");
        Serial.println(minimumEverFreeHeapSize); // Print minimum ever free heap size after allocation

        vPortFree(s); // Free allocated memory

    } else {
        Serial.println("Memory allocation failed");
    }

    freeHeapSize = xPortGetFreeHeapSize();
    Serial.print("Free heap size after freeing memory: ");
    Serial.println(freeHeapSize);

    minimumEverFreeHeapSize = xPortGetMinimumEverFreeHeapSize();
    Serial.print("Minimum ever free heap size after freeing memory: ");
    Serial.println(minimumEverFreeHeapSize);

    Serial.println("Setup complete");
}

void loop() {
  // Execution should never get here
}