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Dynamic cast without checking result is slow and useless. Use static cast.
[simgrid.git] / src / s4u / s4u_Exec.cpp
1 /* Copyright (c) 2006-2019. The SimGrid Team. All rights reserved.          */
2
3 /* This program is free software; you can redistribute it and/or modify it
4  * under the terms of the license (GNU LGPL) which comes with this package. */
5
6 #include "simgrid/s4u/Actor.hpp"
7 #include "simgrid/s4u/Exec.hpp"
8 #include "src/kernel/activity/ExecImpl.hpp"
9 #include "xbt/log.h"
10
11 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(s4u_exec, s4u_activity, "S4U asynchronous executions");
12
13 namespace simgrid {
14 namespace s4u {
15 simgrid::xbt::signal<void(simgrid::s4u::ActorPtr)> s4u::Exec::on_start;
16 simgrid::xbt::signal<void(simgrid::s4u::ActorPtr)> s4u::Exec::on_completion;
17
18 Exec::Exec(sg_host_t host, double flops_amount) : Activity(), host_(host), flops_amount_(flops_amount)
19 {
20   Activity::set_remaining(flops_amount_);
21   pimpl_ = simix::simcall([this] {
22     return kernel::activity::ExecImplPtr(new kernel::activity::ExecImpl(name_, tracing_category_,
23                                                                         /*timeout_detector*/ nullptr, host_));
24   });
25 }
26
27 Exec* Exec::start()
28 {
29   simix::simcall(
30       [this] { static_cast<kernel::activity::ExecImpl*>(pimpl_.get())->start(flops_amount_, 1. / priority_, bound_); });
31   state_ = State::STARTED;
32   on_start(Actor::self());
33   return this;
34 }
35
36 Exec* Exec::cancel()
37 {
38   simgrid::simix::simcall([this] { static_cast<kernel::activity::ExecImpl*>(pimpl_.get())->cancel(); });
39   state_ = State::CANCELED;
40   return this;
41 }
42
43 Exec* Exec::wait()
44 {
45   if (state_ == State::INITED)
46     start();
47   simcall_execution_wait(pimpl_);
48   state_ = State::FINISHED;
49   on_completion(Actor::self());
50   return this;
51 }
52
53 Exec* Exec::wait_for(double)
54 {
55   THROW_UNIMPLEMENTED;
56   return this;
57 }
58
59 /** @brief Returns whether the state of the exec is finished */
60 bool Exec::test()
61 {
62   xbt_assert(state_ == State::INITED || state_ == State::STARTED || state_ == State::FINISHED);
63
64   if (state_ == State::FINISHED)
65     return true;
66
67   if (state_ == State::INITED)
68     this->start();
69
70   if (simcall_execution_test(pimpl_)) {
71     state_ = State::FINISHED;
72     return true;
73   }
74
75   return false;
76 }
77
78 /** @brief  Change the execution priority, don't you think?
79  *
80  * An execution with twice the priority will get twice the amount of flops when the resource is shared.
81  * The default priority is 1.
82  *
83  * Currently, this cannot be changed once the exec started. */
84 ExecPtr Exec::set_priority(double priority)
85 {
86   xbt_assert(state_ == State::INITED, "Cannot change the priority of an exec after its start");
87   priority_ = priority;
88   return this;
89 }
90
91 /** @brief change the execution bound, ie the maximal amount of flops per second that it may consume, regardless of what
92  * the host may deliver
93  *
94  * Currently, this cannot be changed once the exec started. */
95 ExecPtr Exec::set_bound(double bound)
96 {
97   xbt_assert(state_ == State::INITED, "Cannot change the bound of an exec after its start");
98   bound_ = bound;
99   return this;
100 }
101
102 /** @brief Change the host on which this activity takes place.
103  *
104  * The activity cannot be terminated already (but it may be started). */
105 ExecPtr Exec::set_host(Host* host)
106 {
107   xbt_assert(state_ == State::INITED || state_ == State::STARTED,
108              "Cannot change the host of an exec once it's done (state: %d)", (int)state_);
109   if (state_ == State::STARTED)
110     boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(pimpl_)->migrate(host);
111   host_ = host;
112   boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(pimpl_)->host_ = host;
113   return this;
114 }
115
116 ExecPtr Exec::set_name(std::string name)
117 {
118   xbt_assert(state_ == State::INITED, "Cannot change the name of an exec after its start");
119   name_ = std::move(name);
120   return this;
121 }
122
123 ExecPtr Exec::set_tracing_category(std::string category)
124 {
125   xbt_assert(state_ == State::INITED, "Cannot change the tracing category of an exec after its start");
126   tracing_category_ = std::move(category);
127   return this;
128 }
129
130 /** @brief Retrieve the host on which this activity takes place. */
131 Host* Exec::get_host()
132 {
133   return host_;
134 }
135
136 /** @brief Returns the amount of flops that remain to be done */
137 double Exec::get_remaining()
138 {
139   return simgrid::simix::simcall(
140       [this]() { return boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(pimpl_)->get_remaining(); });
141 }
142
143 /** @brief Returns the ratio of elements that are still to do
144  *
145  * The returned value is between 0 (completely done) and 1 (nothing done yet).
146  */
147 double Exec::get_remaining_ratio()
148 {
149   return simgrid::simix::simcall([this]() {
150     return boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(pimpl_)->get_remaining_ratio();
151   });
152 }
153
154 void intrusive_ptr_release(simgrid::s4u::Exec* e)
155 {
156   if (e->refcount_.fetch_sub(1, std::memory_order_release) == 1) {
157     std::atomic_thread_fence(std::memory_order_acquire);
158     delete e;
159   }
160 }
161
162 void intrusive_ptr_add_ref(simgrid::s4u::Exec* e)
163 {
164   e->refcount_.fetch_add(1, std::memory_order_relaxed);
165 }
166 } // namespace s4u
167 } // namespace simgrid