◆ getFreeHeap()

HeapInfo fl::getFreeHeap ( )

Query available heap memory.

Platform implementations:

ESP32: Reports both SRAM (heap_caps_get_free_size(MALLOC_CAP_INTERNAL)) and PSRAM (heap_caps_get_free_size(MALLOC_CAP_SPIRAM)) if available
ESP8266: Reports SRAM only (no PSRAM support)
AVR: Reports available SRAM between heap and stack (no PSRAM)
ARM: Platform-dependent (SRAM only, no PSRAM)
Native/Stub: Returns {0, 0} (heap size not available in standard C++)
WASM: Returns {0, 0} (JavaScript heap is managed externally)

Usage:

fl::HeapInfo heap = fl::getFreeHeap();
if (heap.free_sram < 1024) {
    // Low SRAM warning
}
if (heap.has_psram()) {
    // PSRAM is available
}

Definition at line 67 of file heap.cpp.hpp.

                       {
    HeapInfo info;
    info.free_sram = 0;   // Not available
    info.free_psram = 0;  // Not available
    return info;
}