X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/f6ea9d672be1e8c695c1757126f00ece5b5cf790..3388e09cbb920fc3b904327f3b254f794e231ed1:/include/simgrid/kernel/future.hpp

diff --git a/include/simgrid/kernel/future.hpp b/include/simgrid/kernel/future.hpp
index 9a57f8b6a1..6adfe664dd 100644
--- a/include/simgrid/kernel/future.hpp
+++ b/include/simgrid/kernel/future.hpp
@@ -1,4 +1,4 @@
-/* Copyright (c) 2016. The SimGrid Team.
+/* Copyright (c) 2016-2018. The SimGrid Team.
  * All rights reserved.                                                     */
 
 /* This program is free software; you can redistribute it and/or modify it
@@ -48,7 +48,7 @@ public:
   FutureStateBase(FutureStateBase const&) = delete;
   FutureStateBase& operator=(FutureStateBase const&) = delete;
 
-  XBT_PUBLIC(void) schedule(simgrid::xbt::Task<void()>&& job);
+  XBT_PUBLIC void schedule(simgrid::xbt::Task<void()>&& job);
 
   void set_exception(std::exception_ptr exception)
   {
@@ -61,7 +61,7 @@ public:
 
   void set_continuation(simgrid::xbt::Task<void()>&& continuation)
   {
-    xbt_assert(!continuation_);
+    xbt_assert(not continuation_);
     switch (status_) {
     case FutureStatus::done:
       // This is not supposed to happen if continuation is set
@@ -121,6 +121,7 @@ protected:
     status_ = FutureStatus::done;
     if (exception_) {
       std::exception_ptr exception = std::move(exception_);
+      exception_ = nullptr;
       std::rethrow_exception(std::move(exception));
     }
   }
@@ -136,7 +137,7 @@ private:
  *  You are not expected to use them directly but to create them
  *  implicitely through a @ref simgrid::kernel::Promise.
  *  Alternatively kernel operations could inherit or contain FutureState
- *  if they are managed with @ref std::shared_ptr.
+ *  if they are managed with std::shared_ptr.
  **/
 template<class T>
 class FutureState : public FutureStateBase {
@@ -180,7 +181,7 @@ public:
     xbt_assert(this->value_);
     T* result = value_;
     value_ = nullptr;
-    return *value_;
+    return *result;
   }
 
 private:
@@ -206,9 +207,9 @@ public:
 template<class T>
 void bindPromise(Promise<T> promise, Future<T> future)
 {
-  struct PromiseBinder {
+  class PromiseBinder {
   public:
-    PromiseBinder(Promise<T> promise) : promise_(std::move(promise)) {}
+    explicit PromiseBinder(Promise<T> promise) : promise_(std::move(promise)) {}
     void operator()(Future<T> future)
     {
       simgrid::xbt::setPromise(promise_, future);
@@ -260,7 +261,7 @@ template<class T> Future<T> unwrapFuture(Future<Future<T>> future);
  *  );
  *  </pre>
  *
- *  This is based on C++1z @ref std::future but with some differences:
+ *  This is based on C++1z std::future but with some differences:
  *
  *  * there is no thread synchronization (atomic, mutex, condition variable,
  *    etc.) because everything happens in the SimGrid event loop;
@@ -281,7 +282,7 @@ template<class T>
 class Future {
 public:
   Future() = default;
-  Future(std::shared_ptr<FutureState<T>> state): state_(std::move(state)) {}
+  explicit Future(std::shared_ptr<FutureState<T>> state) : state_(std::move(state)) {}
 
   // Move type:
   Future(Future&) = delete;
@@ -326,8 +327,7 @@ public:
       throw std::future_error(std::future_errc::no_state);
     // Give shared-ownership to the continuation:
     auto state = std::move(state_);
-    state->set_continuation(simgrid::xbt::makeTask(
-      std::move(continuation), state));
+    state->set_continuation(simgrid::xbt::make_task(std::move(continuation), state));
   }
 
   /** Attach a continuation to this future
@@ -346,15 +346,13 @@ public:
     Promise<R> promise;
     Future<R> future = promise.get_future();
     // ...and when the current future is ready...
-    state->set_continuation(simgrid::xbt::makeTask(
-      [](Promise<R> promise, std::shared_ptr<FutureState<T>> state, F continuation) {
-        // ...set the new future value by running the continuation.
-        Future<T> future(std::move(state));
-        simgrid::xbt::fulfillPromise(promise,[&]{
-          return continuation(std::move(future));
-        });
-      },
-      std::move(promise), state, std::move(continuation)));
+    state->set_continuation(simgrid::xbt::make_task(
+        [](Promise<R> promise, std::shared_ptr<FutureState<T>> state, F continuation) {
+          // ...set the new future value by running the continuation.
+          Future<T> future(std::move(state));
+          simgrid::xbt::fulfillPromise(promise, [&] { return continuation(std::move(future)); });
+        },
+        std::move(promise), state, std::move(continuation)));
     return std::move(future);
   }
 
@@ -368,12 +366,9 @@ public:
    *                     the future is ready
    * @exception std::future_error no state is associated with the future
    */
-  template<class F>
-  auto then(F continuation)
-  -> typename std::enable_if<
-       !is_future<decltype(continuation(std::move(*this)))>::value,
-       Future<decltype(continuation(std::move(*this)))>
-     >::type
+  template <class F>
+  auto then(F continuation) -> typename std::enable_if<not is_future<decltype(continuation(std::move(*this)))>::value,
+                                                       Future<decltype(continuation(std::move(*this)))>>::type
   {
     return this->thenNoUnwrap(std::move(continuation));
   }
@@ -392,7 +387,7 @@ public:
   /** Get the value from the future
    *
    *  The future must be valid and ready in order to make this call.
-   *  @ref std::future blocks when the future is not ready but we are
+   *  std::future blocks when the future is not ready but we are
    *  completely single-threaded so blocking would be a deadlock.
    *  After the call, the future becomes invalid.
    *
@@ -421,12 +416,12 @@ Future<T> unwrapFuture(Future<Future<T>> future)
   return std::move(result);
 }
 
-/** Producer side of a @simgrid::kernel::Future
+/** Producer side of a @ref simgrid::kernel::Future
  *
  *  A @ref Promise is connected to some `Future` and can be used to
  *  set its result.
  *
- *  Similar to @ref std::promise
+ *  Similar to std::promise
  *
  *  <code>
  *  // Create a promise and a future:
@@ -457,7 +452,7 @@ template<class T>
 class Promise {
 public:
   Promise() : state_(std::make_shared<FutureState<T>>()) {}
-  Promise(std::shared_ptr<FutureState<T>> state) : state_(std::move(state)) {}
+  explicit Promise(std::shared_ptr<FutureState<T>> state) : state_(std::move(state)) {}
 
   // Move type
   Promise(Promise const&) = delete;
@@ -512,7 +507,7 @@ template<>
 class Promise<void> {
 public:
   Promise() : state_(std::make_shared<FutureState<void>>()) {}
-  Promise(std::shared_ptr<FutureState<void>> state) : state_(std::move(state)) {}
+  explicit Promise(std::shared_ptr<FutureState<void>> state) : state_(std::move(state)) {}
   ~Promise()
   {
     if (state_ && state_->get_status() == FutureStatus::not_ready)