From 6ca79487e20ac748622eceb8b69dac464be83307 Mon Sep 17 00:00:00 2001
From: levlam <levlam@telegram.org>
Date: Thu, 19 Jul 2018 01:14:20 +0300
Subject: [PATCH] Clear language pack info when all language pack managers are
 closed.

GitOrigin-RevId: 2c08722e00ae6209fb90f912b9265ce30bc3aad6
---
 td/telegram/LanguagePackManager.cpp | 12 ++++++++++++
 td/telegram/LanguagePackManager.h   |  3 +++
 2 files changed, 15 insertions(+)

diff --git a/td/telegram/LanguagePackManager.cpp b/td/telegram/LanguagePackManager.cpp
index 14cd7dbc..c34d9b8b 100644
--- a/td/telegram/LanguagePackManager.cpp
+++ b/td/telegram/LanguagePackManager.cpp
@@ -21,6 +21,8 @@
 namespace td {
 
 void LanguagePackManager::start_up() {
+  std::lock_guard<std::mutex> lock(language_packs_mutex_);
+  manager_count_++;
   language_pack_ = G()->shared_config().get_option_string("language_pack");
   language_code_ = G()->shared_config().get_option_string("language_code");
   LOG(INFO) << "Use language pack " << language_pack_ << " with language " << language_code_;
@@ -28,6 +30,15 @@ void LanguagePackManager::start_up() {
   // TODO load language_pack_version from database
 }
 
+void LanguagePackManager::tear_down() {
+  std::lock_guard<std::mutex> lock(language_packs_mutex_);
+  manager_count_--;
+  if (manager_count_ == 0) {
+    LOG(INFO) << "Clear language packs";
+    language_packs_.clear();
+  }
+}
+
 void LanguagePackManager::on_language_pack_changed() {
   auto new_language_pack = G()->shared_config().get_option_string("language_pack");
   if (new_language_pack == language_pack_) {
@@ -427,6 +438,7 @@ void LanguagePackManager::hangup() {
   stop();
 }
 
+int32 LanguagePackManager::manager_count_ = 0;
 std::mutex LanguagePackManager::language_packs_mutex_;
 std::unordered_map<string, std::unique_ptr<LanguagePackManager::LanguagePack>> LanguagePackManager::language_packs_;
 
diff --git a/td/telegram/LanguagePackManager.h b/td/telegram/LanguagePackManager.h
index 42cf7f7e..b845ae56 100644
--- a/td/telegram/LanguagePackManager.h
+++ b/td/telegram/LanguagePackManager.h
@@ -72,6 +72,8 @@ class LanguagePackManager : public NetQueryCallback {
   string language_code_;
   uint32 generation_ = 0;
 
+  static int32 manager_count_;
+
   static std::mutex language_packs_mutex_;
   static std::unordered_map<string, std::unique_ptr<LanguagePack>> language_packs_;
 
@@ -104,6 +106,7 @@ class LanguagePackManager : public NetQueryCallback {
 
   void start_up() override;
   void hangup() override;
+  void tear_down() override;
 
   Container<Promise<NetQueryPtr>> container_;
   void send_with_promise(NetQueryPtr query, Promise<NetQueryPtr> promise);