134 class Env {
144   Env();
146   Env(std::shared_ptr<FileSystem> fs);
148   Env(const Env&) = delete;
149   void operator=(const Env&) = delete;
151   virtual ~Env();
156   static Status LoadEnv(const std::string& value, Env** result);
159   static Status LoadEnv(const std::string& value, Env** result,
160                         std::shared_ptr<Env>* guard);
167   static Env* Default();
727         io_priority_(Env::IO_TOTAL),  in WritableFile()
728         write_hint_(Env::WLTH_NOT_SET),  in WritableFile()
734         io_priority_(Env::IO_TOTAL),  in WritableFile()
735         write_hint_(Env::WLTH_NOT_SET),  in WritableFile()
805   virtual void SetIOPriority(Env::IOPriority pri) { io_priority_ = pri; }  in SetIOPriority()
807   virtual Env::IOPriority GetIOPriority() { return io_priority_; }  in GetIOPriority()
809   virtual void SetWriteLifeTimeHint(Env::WriteLifeTimeHint hint) {  in SetWriteLifeTimeHint()
813   virtual Env::WriteLifeTimeHint GetWriteLifeTimeHint() { return write_hint_; }  in GetWriteLifeTimeHint()
901   Env::IOPriority io_priority_;
902   Env::WriteLifeTimeHint write_hint_;
1131 extern Status WriteStringToFile(Env* env, const Slice& data,
1136 extern Status ReadFileToString(Env* env, const std::string& fname,
1167 class EnvWrapper : public Env {
1170   explicit EnvWrapper(Env* t) : target_(t) {}  in EnvWrapper()
1174   Env* target() const { return target_; }  in target()
1402   Env* target_;
1481   void SetIOPriority(Env::IOPriority pri) override {  in SetIOPriority()
1485   Env::IOPriority GetIOPriority() override { return target_->GetIOPriority(); }  in GetIOPriority()
1487   void SetWriteLifeTimeHint(Env::WriteLifeTimeHint hint) override {  in SetWriteLifeTimeHint()
1491   Env::WriteLifeTimeHint GetWriteLifeTimeHint() override {  in GetWriteLifeTimeHint()
1599 Env* NewMemEnv(Env* base_env);
1603 Status NewHdfsEnv(Env** hdfs_env, const std::string& fsname);
1608 Env* NewTimedEnv(Env* base_env);
1613 Status NewEnvLogger(const std::string& fname, Env* env,
1616 std::unique_ptr<Env> NewCompositeEnv(std::shared_ptr<FileSystem> fs);