logging: Simplify and make thread-safe

This simplifies the logging system.

This also fixes some lost messages on startup.

The simplification is simple. I removed unused functions and moved most things in the .h to the .cpp. I replaced the unnecessary linked list with its contents laid out as three member variables. Anything that went through the linked list now directly accesses the backends. Generic functions are replaced with those for each specific use case and there aren't many. This change increases coupling but we gain back more KISS and encapsulation.

With those changes it was easy to make it thread-safe. I just removed the mutex and turned a boolean atomic. I was planning to use this thread-safety in my next PR about stacktraces. It was actually async-signal-safety at first but I ended up using a different approach. Anyway getting rid of the linked list is important for that because have the list of backends constantly changing complicates things.

1 files changed, 3 insertions, 19 deletions

diff --git a/src/yuzu_cmd/yuzu.cpp b/src/yuzu_cmd/yuzu.cpp
index c10093820..ba2c993ba 100644
--- a/src/yuzu_cmd/yuzu.cpp
+++ b/src/yuzu_cmd/yuzu.cpp
@@ -74,31 +74,14 @@ static void PrintVersion() {
     std::cout << "yuzu " << Common::g_scm_branch << " " << Common::g_scm_desc << std::endl;
 }
 
-static void InitializeLogging() {
-    using namespace Common;
-
-    Log::Filter log_filter(Log::Level::Debug);
-    log_filter.ParseFilterString(static_cast<std::string>(Settings::values.log_filter));
-    Log::SetGlobalFilter(log_filter);
-
-    Log::AddBackend(std::make_unique<Log::ColorConsoleBackend>());
-
-    const auto& log_dir = FS::GetYuzuPath(FS::YuzuPath::LogDir);
-    void(FS::CreateDir(log_dir));
-    Log::AddBackend(std::make_unique<Log::FileBackend>(log_dir / LOG_FILE));
-#ifdef _WIN32
-    Log::AddBackend(std::make_unique<Log::DebuggerBackend>());
-#endif
-}
-
 /// Application entry point
 int main(int argc, char** argv) {
+    Common::Log::Initialize();
+    Common::Log::SetColorConsoleBackendEnabled(true);
     Common::DetachedTasks detached_tasks;
     Config config;
 
     int option_index = 0;
-
-    InitializeLogging();
 #ifdef _WIN32
     int argc_w;
     auto argv_w = CommandLineToArgvW(GetCommandLineW(), &argc_w);
@@ -163,6 +146,7 @@ int main(int argc, char** argv) {
         return -1;
     }
 
+    Core::System::InitializeGlobalInstance();
     auto& system{Core::System::GetInstance()};
     InputCommon::InputSubsystem input_subsystem;