X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/cff982bd049d26d7acbd0e23324e0de051b06d0d..9ff25e521350bc747f963bfe70bf3f84930c1a07:/include/simgrid/simix/blocking_simcall.hpp

diff --git a/include/simgrid/simix/blocking_simcall.hpp b/include/simgrid/simix/blocking_simcall.hpp
deleted file mode 100644
index fd9797f9d8..0000000000
--- a/include/simgrid/simix/blocking_simcall.hpp
+++ /dev/null
@@ -1,164 +0,0 @@
-/* Copyright (c) 2016-2020. The SimGrid Team. All rights reserved.          */
-
-/* This program is free software; you can redistribute it and/or modify it
- * under the terms of the license (GNU LGPL) which comes with this package. */
-
-#ifndef SIMGRID_SIMIX_BLOCKING_SIMCALL_HPP
-#define SIMGRID_SIMIX_BLOCKING_SIMCALL_HPP
-
-#include <exception>
-#include <functional>
-#include <future>
-#include <utility>
-
-#include <xbt/sysdep.h>
-
-#include <xbt/future.hpp>
-#include <simgrid/kernel/future.hpp>
-#include <simgrid/simix.h>
-#include <simgrid/simix.hpp>
-
-namespace simgrid {
-namespace simix {
-
-XBT_PUBLIC void unblock(smx_actor_t process);
-
-/** Execute some code in kernel mode and wakes up the actor when
- *  the result is available.
- *
- * It is given a callback which is executed in the SimGrid kernel and
- * returns a `simgrid::kernel::Future<T>`. The kernel blocks the actor
- * until the Future is ready and:
- *
- *  - either returns the value wrapped in the future to the actor
- *
- *  - or raises the exception stored in the future in the actor.
- *
- * This can be used to implement blocking calls without adding new simcalls.
- * One downside of this approach is that we don't have any semantic on what
- * the actor is waiting. This might be a problem for the model-checker and
- * we'll have to devise a way to make it work.
- *
- * @param     code Kernel code returning a `simgrid::kernel::Future<T>`
- * @return         Value of the kernel future
- * @exception      Exception from the kernel future
- */
-template <class F> auto kernel_sync(F code) -> decltype(code().get())
-{
-  using T = decltype(code().get());
-  if (SIMIX_is_maestro())
-    xbt_die("Can't execute blocking call in kernel mode");
-
-  smx_actor_t self = SIMIX_process_self();
-  simgrid::xbt::Result<T> result;
-
-  simcall_run_blocking(
-      [&result, self, &code] {
-        try {
-          auto future = code();
-          future.then_([&result, self](std::shared_ptr<simgrid::kernel::FutureState<T>> value) {
-            simgrid::xbt::set_promise(result, simgrid::kernel::Future<T>(std::move(value)));
-            simgrid::simix::unblock(self);
-          });
-        } catch (...) {
-          result.set_exception(std::current_exception());
-          simgrid::simix::unblock(self);
-        }
-      },
-      nullptr);
-  return result.get();
-}
-
-/** A blocking (`wait()`-based) future for SIMIX processes */
-// TODO, .wait_for
-// TODO, .wait_until
-// TODO, SharedFuture
-// TODO, simgrid::simix::when_all - wait for all future to be ready (this one is simple!)
-// TODO, simgrid::simix::when_any - wait for any future to be ready
-template <class T>
-class Future {
-public:
-  Future() = default;
-  explicit Future(simgrid::kernel::Future<T> future) : future_(std::move(future)) {}
-  Future(Future&&) noexcept = default;
-  Future& operator=(Future&&) noexcept = default;
-
-  bool valid() const { return future_.valid(); }
-  T get()
-  {
-    if (not valid())
-      throw std::future_error(std::future_errc::no_state);
-    smx_actor_t self = SIMIX_process_self();
-    simgrid::xbt::Result<T> result;
-    simcall_run_blocking(
-        [this, &result, self] {
-          try {
-            // When the kernel future is ready...
-            this->future_.then_([&result, self](std::shared_ptr<simgrid::kernel::FutureState<T>> value) {
-              // ... wake up the process with the result of the kernel future.
-              simgrid::xbt::set_promise(result, simgrid::kernel::Future<T>(std::move(value)));
-              simgrid::simix::unblock(self);
-            });
-          } catch (...) {
-            result.set_exception(std::current_exception());
-            simgrid::simix::unblock(self);
-          }
-        },
-        nullptr);
-    return result.get();
-  }
-  bool is_ready() const
-  {
-    if (not valid())
-      throw std::future_error(std::future_errc::no_state);
-    return future_.is_ready();
-  }
-  void wait()
-  {
-    // The future is ready! We don't have to wait:
-    if (this->is_ready())
-      return;
-    // The future is not ready. We have to delegate to the SimGrid kernel:
-    std::exception_ptr exception;
-    smx_actor_t self = SIMIX_process_self();
-    simcall_run_blocking(
-        [this, &exception, self] {
-          try {
-            // When the kernel future is ready...
-            this->future_.then_([this, self](std::shared_ptr<simgrid::kernel::FutureState<T>> value) {
-              // ...store it the simix kernel and wake up.
-              this->future_ = simgrid::kernel::Future<T>(std::move(value));
-              simgrid::simix::unblock(self);
-            });
-          } catch (...) {
-            exception = std::current_exception();
-            simgrid::simix::unblock(self);
-          }
-        },
-        nullptr);
-  }
-
-private:
-  // We wrap an event-based kernel future:
-  simgrid::kernel::Future<T> future_;
-};
-
-/** Start some asynchronous work
- *
- *  @param code SimGrid kernel code which returns a simgrid::kernel::Future
- *  @return     Actor future
- */
-template <class F> auto kernel_async(F code) -> Future<decltype(code().get())>
-{
-  using T = decltype(code().get());
-
-  // Execute the code in the kernel and get the kernel future:
-  simgrid::kernel::Future<T> future = simgrid::kernel::actor::simcall(std::move(code));
-
-  // Wrap the kernel future in an actor future:
-  return simgrid::simix::Future<T>(std::move(future));
-}
-}
-}
-
-#endif