Organic Maps sources as of 02.04.2025 (fad26bbf22ac3da75e01e62aa01e5c8e11861005)

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platform/trace_android.cpp

@@ -0,0 +1,88 @@
+#include "platform/trace.hpp"
+
+#include <android/trace.h>
+#include <dlfcn.h>
+
+namespace platform
+{
+// Source: https://developer.android.com/topic/performance/tracing/custom-events-native
+typedef void *(*ATrace_beginSection) (char const *);
+typedef void *(*ATrace_endSection) (void);
+typedef void *(*ATrace_setCounter) (char const *, int64_t);
+
+class TraceImpl
+{
+public:
+  TraceImpl()
+  {
+    m_lib = dlopen("libandroid.so", RTLD_NOW | RTLD_LOCAL);
+
+    // Access the native tracing functions.
+    if (m_lib != nullptr) 
+    {
+      // Use dlsym() to prevent crashes on devices running Android 5.1
+      // (API level 22) or lower.
+      m_beginSection = reinterpret_cast<ATrace_beginSection>(dlsym(m_lib, "ATrace_beginSection"));
+      m_endSection = reinterpret_cast<ATrace_endSection>(dlsym(m_lib, "ATrace_endSection"));
+      m_setCounter = reinterpret_cast<ATrace_setCounter>(dlsym(m_lib, "ATrace_setCounter"));
+    }
+  }
+
+  ~TraceImpl()
+  {
+    if (m_lib != nullptr)
+      dlclose(m_lib);
+  }
+
+  void BeginSection(char const * name) noexcept
+  {
+    if (m_beginSection != nullptr)
+      m_beginSection(name);
+  }
+
+  void EndSection() noexcept
+  {
+    if (m_endSection != nullptr)
+      m_endSection();
+  }
+
+  void SetCounter(char const * name, int64_t value) noexcept
+  {
+    if (m_setCounter != nullptr)
+      m_setCounter(name, value);
+  }
+
+private:
+  void * m_lib = nullptr;
+  ATrace_beginSection m_beginSection = nullptr;
+  ATrace_endSection m_endSection = nullptr;
+  ATrace_setCounter m_setCounter = nullptr;
+};
+
+// static 
+Trace & Trace::Instance() noexcept {
+  static Trace instance;
+  return instance;
+}
+
+Trace::Trace() 
+  : m_impl(std::make_unique<TraceImpl>())
+{}
+
+Trace::~Trace() = default;
+  
+void Trace::BeginSection(char const * name) noexcept 
+{
+  m_impl->BeginSection(name);
+}
+
+void Trace::EndSection() noexcept 
+{
+  m_impl->EndSection();
+}
+
+void Trace::SetCounter(char const * name, int64_t value) noexcept
+{
+  m_impl->SetCounter(name, value);
+}
+}  // namespace platform