[clangd] Implemented logging using Context

Reviewers: sammccall, ioeric, hokein

Reviewed By: sammccall

Subscribers: klimek, cfe-commits

Differential Revision: https://reviews.llvm.org/D40486

llvm-svn: 320576

1 files changed, 19 insertions, 5 deletions

diff --git a/clang-tools-extra/clangd/Logger.cpp b/clang-tools-extra/clangd/Logger.cpp
index 0448c6f5b6d..2c0c6f9974a 100644
--- a/clang-tools-extra/clangd/Logger.cpp
+++ b/clang-tools-extra/clangd/Logger.cpp
@@ -9,11 +9,25 @@
 
 #include "Logger.h"
 
-using namespace clang::clangd;
+namespace clang {
+namespace clangd {
 
-EmptyLogger &EmptyLogger::getInstance() {
-  static EmptyLogger Logger;
-  return Logger;
+namespace {
+Logger *L = nullptr;
+} // namespace
+
+LoggingSession::LoggingSession(clangd::Logger &Instance) {
+  assert(!L);
+  L = &Instance;
+}
+
+LoggingSession::~LoggingSession() { L = nullptr; }
+
+void log(const Context &Ctx, const llvm::Twine &Message) {
+  if (!L)
+    return;
+  L->log(Ctx, Message);
 }
 
-void EmptyLogger::log(const llvm::Twine &Message) {}
+} // namespace clangd
+} // namespace clang