Optionally use RTKit/D-Bus to set elevated priority

If pthread_setschedparam fails or is unavailable.

1 files changed, 46 insertions, 0 deletions

diff --git a/core/dbus_wrap.cpp b/core/dbus_wrap.cpp
new file mode 100644
index 00000000..506dd815
--- /dev/null
+++ b/core/dbus_wrap.cpp
@@ -0,0 +1,46 @@
+
+#include "config.h"
+
+#include "dbus_wrap.h"
+
+#ifdef HAVE_DYNLOAD
+
+#include <mutex>
+#include <type_traits>
+
+#include "logging.h"
+
+
+void *dbus_handle{nullptr};
+#define DECL_FUNC(x) decltype(x) *p##x{};
+DBUS_FUNCTIONS(DECL_FUNC)
+#undef DECL_FUNC
+
+void PrepareDBus()
+{
+    static constexpr char libname[] = "libdbus-1.so.3";
+
+    auto load_func = [](auto &f, const char *name) -> void
+    { f = reinterpret_cast<std::remove_reference_t<decltype(f)>>(GetSymbol(dbus_handle, name)); };
+#define LOAD_FUNC(x) do {                         \
+    load_func(p##x, #x);                          \
+    if(!p##x)                                     \
+    {                                             \
+        WARN("Failed to load function %s\n", #x); \
+        CloseLib(dbus_handle);                    \
+        dbus_handle = nullptr;                    \
+        return;                                   \
+    }                                             \
+} while(0);
+
+    dbus_handle = LoadLib(libname);
+    if(!dbus_handle)
+    {
+        WARN("Failed to load %s\n", libname);
+        return;
+    }
+
+DBUS_FUNCTIONS(LOAD_FUNC)
+#undef LOAD_FUNC
+}
+#endif