X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/2bfd59feb2da75a1eabaac5e6727a9dd2a8bb7d4..HEAD:/include/simgrid/s4u/Exec.hpp

diff --git a/include/simgrid/s4u/Exec.hpp b/include/simgrid/s4u/Exec.hpp
index 84b0ea08ac..8167b87c24 100644
--- a/include/simgrid/s4u/Exec.hpp
+++ b/include/simgrid/s4u/Exec.hpp
@@ -1,4 +1,4 @@
-/* Copyright (c) 2017. The SimGrid Team. All rights reserved.          */
+/* Copyright (c) 2017-2023. 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. */
@@ -6,54 +6,86 @@
 #ifndef SIMGRID_S4U_EXEC_HPP
 #define SIMGRID_S4U_EXEC_HPP
 
-#include "src/kernel/activity/ExecImpl.hpp"
 #include <simgrid/forward.h>
-#include <simgrid/s4u/forward.hpp>
+#include <simgrid/s4u/Activity.hpp>
+#include <simgrid/s4u/Actor.hpp>
+#include <xbt/ex.h>
 
-namespace simgrid {
-namespace s4u {
+namespace simgrid::s4u {
+
+/** Computation Activity, representing the asynchronous executions.
+ *
+ * @beginrst
+ * Most of them are created with :cpp:func:`simgrid::s4u::this_actor::exec_init()` or
+ * :cpp:func:`simgrid::s4u::Host::execute()`, and represent a classical (sequential) execution. This can be used to
+ * simulate some computation occurring in another thread when the calling actor is not blocked during the execution.
+ *
+ * You can also use :cpp:func:`simgrid::s4u::this_actor::parallel_execute()` to create *parallel* executions. These
+ * objects represent distributed computations involving computations on several hosts and communications between them.
+ * Such objects can for example represent a matrix multiplication done with ScaLAPACK on a real system. Once created,
+ * parallel Exec are very similar to the sequential ones. The only difference is that you cannot migrate them, and their
+ * remaining amount of work can only be defined as a ratio. See the doc of :cpp:func:`simgrid::s4u::Exec::get_remaining`
+ * and :cpp:func:`simgrid::s4u::Exec::get_remaining_ratio` for more info.
+ * @endrst
+ */
+class XBT_PUBLIC Exec : public Activity_T<Exec> {
+#ifndef DOXYGEN
+  friend kernel::activity::ExecImpl;
+  friend kernel::EngineImpl; // Auto-completes the execs of maestro (in simDAG)
+#endif
+
+  bool parallel_ = false;
+
+protected:
+  explicit Exec(kernel::activity::ExecImplPtr pimpl);
+  Exec* do_start() override;
+
+  void reset() const;
 
-XBT_PUBLIC_CLASS Exec : public Activity
-{
-  Exec() : Activity() {}
 public:
-  friend void intrusive_ptr_release(simgrid::s4u::Exec * e)
-  {
-    if (e->refcount_.fetch_sub(1, std::memory_order_release) == 1) {
-      std::atomic_thread_fence(std::memory_order_acquire);
-      delete e;
-    }
-  }
-
-  friend void intrusive_ptr_add_ref(simgrid::s4u::Exec * e) { e->refcount_.fetch_add(1, std::memory_order_relaxed); }
-
-  friend Actor; // Factory of Exec
-
-  ~Exec() = default;
-
-  void start() override
-  {
-    pimpl_ = simcall_execution_start(nullptr, flops_amount_, 1 / priority_, 0.);
-    state_ = started;
-  }
-  void wait() override { this->wait(-1); }
-  void wait(double timeout) override { simcall_execution_wait(pimpl_); }
-
-  double getRemains()
-  {
-    return simgrid::simix::kernelImmediate(
-        [this]() { return boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(pimpl_)->remains(); });
-  }
-
-private:
-  smx_actor_t runner_  = nullptr;
-  double flops_amount_ = 0.0;
-  double priority_     = 1.0;
-  double bound_        = 0.0;
-
-  std::atomic_int_fast32_t refcount_{0};
-}; // class
-}
-}; // Namespace simgrid::s4u
+#ifndef DOXYGEN
+  Exec(Exec const&) = delete;
+  Exec& operator=(Exec const&) = delete;
+#endif
+  /*! \static Initiate the creation of an Exec. Setters have to be called afterwards */
+  static ExecPtr init();
+
+  /** @brief On sequential executions, returns the amount of flops that remain to be done; This cannot be used on
+   * parallel executions. */
+  double get_remaining() const override;
+  double get_remaining_ratio() const;
+  ExecPtr set_host(Host* host);
+  ExecPtr set_hosts(const std::vector<Host*>& hosts);
+  ExecPtr unset_host();
+  ExecPtr unset_hosts() { return unset_host(); }
+
+  ExecPtr set_flops_amount(double flops_amount);
+  ExecPtr set_flops_amounts(const std::vector<double>& flops_amounts);
+  ExecPtr set_bytes_amounts(const std::vector<double>& bytes_amounts);
+
+  ExecPtr set_thread_count(int thread_count);
+
+  ExecPtr set_bound(double bound);
+  ExecPtr set_priority(double priority);
+  ExecPtr update_priority(double priority);
+
+  Host* get_host() const;
+  unsigned int get_host_number() const;
+  int get_thread_count() const;
+  double get_cost() const;
+  bool is_parallel() const { return parallel_; }
+  bool is_assigned() const override;
+
+#ifndef DOXYGEN
+  static ssize_t deprecated_wait_any_for(const std::vector<ExecPtr>& execs, double timeout); // XBT_ATTRIB_DEPRECATED_v339
+
+  XBT_ATTRIB_DEPRECATED_v339("Please use ActivitySet instead") static ssize_t
+      wait_any(const std::vector<ExecPtr>& execs) { return deprecated_wait_any_for(execs, -1); }
+  XBT_ATTRIB_DEPRECATED_v339("Please use ActivitySet instead") static ssize_t
+      wait_any_for(const std::vector<ExecPtr>& execs, double timeout) { return deprecated_wait_any_for(execs, timeout); }
+#endif
+};
+
+} // namespace simgrid::s4u
 
 #endif /* SIMGRID_S4U_EXEC_HPP */