A thread-per-task executor

[folly.git] / folly / futures / Promise.h

diff --git a/folly/futures/Promise.h b/folly/futures/Promise.h
index e39ea57f0d2ff9e06ae11547ee9a7994666f109b..379ad5d6fdc2b5c273a1cfeb5ff44110936370d6 100644 (file)
--- a/folly/futures/Promise.h
+++ b/folly/futures/Promise.h
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 Facebook, Inc.
+ * Copyright 2016 Facebook, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,7 +16,7 @@
 
 #pragma once
 
-#include <folly/futures/Deprecated.h>
+#include <folly/Portability.h>
 #include <folly/futures/Try.h>
 #include <functional>
 
@@ -53,7 +53,8 @@ public:
       p.setException(std::current_exception());
     }
     */
-  void setException(std::exception_ptr const&) DEPRECATED;
+  FOLLY_DEPRECATED("use setException(exception_wrapper)")
+  void setException(std::exception_ptr const&);
 
   /** Fulfill the Promise with an exception type E, which can be passed to
     std::make_exception_ptr(). Useful for originating exceptions. If you
@@ -70,14 +71,18 @@ public:
   /// handled.
   void setInterruptHandler(std::function<void(exception_wrapper const&)>);
 
-  /** Fulfill this Promise (only for Promise<void>) */
-  void setValue();
+  /// Sugar to fulfill this Promise<Unit>
+  template <class B = T>
+  typename std::enable_if<std::is_same<Unit, B>::value, void>::type
+  setValue() {
+    setTry(Try<T>(T()));
+  }
 
   /** Set the value (use perfect forwarding for both move and copy) */
   template <class M>
   void setValue(M&& value);
 
-  void setTry(Try<T> t);
+  void setTry(Try<T>&& t);
 
   /** Fulfill this Promise with the result of a function that takes no
     arguments and returns something implicitly convertible to T.
@@ -88,8 +93,11 @@ public:
   template <class F>
   void setWith(F&& func);
 
+  bool isFulfilled();
+
 private:
   typedef typename Future<T>::corePtr corePtr;
+  template <class> friend class Future;
 
   // Whether the Future has been retrieved (a one-time operation).
   bool retrieved_;