// Copyright 2021 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "quiche/quic/core/quic_connection_context.h"

#include "absl/base/attributes.h"

namespace quic {
namespace {
ABSL_CONST_INIT thread_local QuicConnectionContext* current_context = nullptr;
}  // namespace

// static
QuicConnectionContext* QuicConnectionContext::Current() {
  return current_context;
}

QuicConnectionContextSwitcher::QuicConnectionContextSwitcher(
    QuicConnectionContext* new_context)
    : old_context_(QuicConnectionContext::Current()) {
  current_context = new_context;
  if (new_context && new_context->tracer) {
    new_context->tracer->Activate();
  }
}

QuicConnectionContextSwitcher::~QuicConnectionContextSwitcher() {
  QuicConnectionContext* current = QuicConnectionContext::Current();
  if (current && current->tracer) {
    current->tracer->Deactivate();
  }
  current_context = old_context_;
}

}  // namespace quic