Expose ThreadPool under include/rocksdb/threadpool.h

Summary:
This diff split ThreadPool to
-ThreadPool (abstract interface exposed in include/rocksdb/threadpool.h)
-ThreadPoolImpl (actual implementation in util/threadpool_imp.h)

This allow us to expose ThreadPool to the user so we can use it as an option later

Test Plan: existing unit tests

Reviewers: andrewkr, yiwu, yhchiang, sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D62085

1 files changed, 4 insertions, 5 deletions

diff --git a/port/win/env_win.h b/port/win/env_win.h
index 9b1e012c9..2c994f2a4 100644
--- a/port/win/env_win.h
+++ b/port/win/env_win.h
@@ -17,7 +17,7 @@
 #pragma once
 
 #include <rocksdb/env.h>
-#include "util/threadpool.h"
+#include "util/threadpool_imp.h"
 
 #include <mutex>
 #include <vector>
@@ -63,7 +63,7 @@ private:
 
   Env*                     hosted_env_;
   mutable std::mutex       mu_;
-  std::vector<ThreadPool>  thread_pools_;
+  std::vector<ThreadPoolImpl> thread_pools_;
   std::vector<std::thread> threads_to_join_;
 
 };
@@ -268,9 +268,8 @@ public:
 private:
 
   WinEnvIO      winenv_io_;
-  WinEnvThreads winenv_threads_; 
-
+  WinEnvThreads winenv_threads_;
 };
 
 }
-}
\ No newline at end of file
+}