/*
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Show extended heap stats when EspClass::getHeapStats() is available
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*/
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#pragma once
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#include <type_traits>
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struct heap_stats_t {
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uint32_t available;
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uint16_t usable;
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uint8_t frag_pct;
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};
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namespace EspClass_has_getHeapStats {
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struct _detector {
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template<typename T, typename = decltype(
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std::declval<T>().getHeapStats(0,0,0))>
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static std::true_type detect(int);
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template<typename>
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static std::false_type detect(...);
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};
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template <typename T>
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struct detector : public _detector {
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using result = decltype(
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std::declval<detector>().template detect<T>(0));
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};
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template <typename T>
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struct typed_check : public detector<T>::result {
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};
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typed_check<EspClass> check{};
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};
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template <typename T>
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void _getHeapStats(std::true_type&, T& instance, heap_stats_t& stats) {
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instance.getHeapStats(&stats.available, &stats.usable, &stats.frag_pct);
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}
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template <typename T>
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void _getHeapStats(std::false_type&, T& instance, heap_stats_t& stats) {
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stats.available = instance.getFreeHeap();
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stats.usable = 0;
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stats.frag_pct = 0;
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}
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void getHeapStats(heap_stats_t& stats) {
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_getHeapStats(EspClass_has_getHeapStats::check, ESP, stats);
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}
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// WTF
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// Calling ESP.getFreeHeap() is making the system crash on a specific
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// AiLight bulb, but anywhere else it should work as expected
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static bool _heap_value_wtf = false;
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heap_stats_t getHeapStats() {
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heap_stats_t stats;
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if (_heap_value_wtf) {
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stats.available = 9999;
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stats.usable = 9999;
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stats.frag_pct = 0;
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return stats;
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}
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getHeapStats(stats);
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return stats;
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}
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void wtfHeap(bool value) {
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_heap_value_wtf = value;
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}
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unsigned int getFreeHeap() {
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return getHeapStats().available;
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}
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static unsigned int _initial_heap_value = 0;
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void setInitialFreeHeap() {
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_initial_heap_value = getFreeHeap();
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}
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unsigned int getInitialFreeHeap() {
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if (0 == _initial_heap_value) {
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setInitialFreeHeap();
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}
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return _initial_heap_value;
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}
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void infoMemory(const char* name, const heap_stats_t& stats) {
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infoMemory(name, getInitialFreeHeap(), stats.available);
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}
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void infoHeapStats(const char* name, const heap_stats_t& stats) {
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DEBUG_MSG_P(
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PSTR("[MAIN] %-6s: %5u contiguous bytes available (%u%% fragmentation)\n"),
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name,
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stats.usable,
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stats.frag_pct
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);
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}
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void infoHeapStats(bool show_frag_stats = true) {
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const auto stats = getHeapStats();
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infoMemory("Heap", stats);
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if (show_frag_stats && EspClass_has_getHeapStats::check) {
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infoHeapStats("Heap", stats);
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}
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}
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