1 /* Copyright (c) 2019-2021. The SimGrid Team. All rights reserved. */
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. */
6 #ifndef SIMGRID_MC_SIMCALL_OBSERVER_HPP
7 #define SIMGRID_MC_SIMCALL_OBSERVER_HPP
9 #include "simgrid/forward.h"
17 class SimcallObserver {
18 ActorImpl* const issuer_;
21 explicit SimcallObserver(ActorImpl* issuer) : issuer_(issuer) {}
22 ActorImpl* get_issuer() const { return issuer_; }
23 /** Whether this transition can currently be taken without blocking.
25 * For example, a mutex_lock is not enabled when the mutex is not free.
26 * A comm_receive is not enabled before the corresponding send has been issued.
28 virtual bool is_enabled() const { return true; }
30 /** Returns the amount of time that this transition can be used.
32 * If it's 1 (as with send/wait), there is no need to fork the state space exploration on this point.
33 * If it's more than one (as with mc_random or waitany), we need to consider this transition several times to start
36 virtual int get_max_consider() const { return 1; }
38 /** Prepares the simcall to be used.
40 * For most simcalls, this does nothing. Once enabled, there is nothing to do to prepare a send().
42 * It is useful only for the simcalls that can be used several times, such as waitany() or random().
43 * For them, prepare() selects the right outcome for the time being considered.
45 * The first time a simcall is considered, times_considered is 0, not 1.
47 virtual void prepare(int times_considered)
48 { /* Nothing to do by default */
51 virtual SimcallObserver* clone() = 0;
53 /** Some simcalls may only be observable under some circumstances.
54 * Most simcalls are not visible from the MC because they don't have an observer at all. */
55 virtual bool is_visible() const { return true; }
56 virtual std::string to_string(int times_considered) const = 0;
57 virtual std::string dot_label() const = 0;
60 template <class T> class ResultingSimcall : public SimcallObserver {
64 ResultingSimcall(smx_actor_t actor, T default_result) : SimcallObserver(actor), result_(default_result) {}
65 void set_result(T res) { result_ = res; }
66 T get_result() const { return result_; }
69 class RandomSimcall : public SimcallObserver {
75 RandomSimcall(smx_actor_t actor, int min, int max) : SimcallObserver(actor), min_(min), max_(max) {}
76 int get_max_consider() const override;
77 void prepare(int times_considered) override;
78 std::string to_string(int times_considered) const override;
79 std::string dot_label() const override;
80 int get_value() const { return next_value_; }
81 SimcallObserver* clone() override
83 auto res = new RandomSimcall(get_issuer(), min_, max_);
84 res->next_value_ = next_value_;
89 class MutexUnlockSimcall : public SimcallObserver {
90 using SimcallObserver::SimcallObserver;
93 SimcallObserver* clone() override { return new MutexUnlockSimcall(get_issuer()); }
94 std::string to_string(int times_considered) const override;
95 std::string dot_label() const override;
98 class MutexLockSimcall : public SimcallObserver {
99 activity::MutexImpl* const mutex_;
100 const bool blocking_;
103 MutexLockSimcall(smx_actor_t actor, activity::MutexImpl* mutex, bool blocking = true)
104 : SimcallObserver(actor), mutex_(mutex), blocking_(blocking)
107 SimcallObserver* clone() override { return new MutexLockSimcall(get_issuer(), mutex_, blocking_); }
108 bool is_enabled() const override;
109 std::string to_string(int times_considered) const override;
110 std::string dot_label() const override;
111 activity::MutexImpl* get_mutex() const { return mutex_; }
114 class ConditionWaitSimcall : public ResultingSimcall<bool> {
115 activity::ConditionVariableImpl* const cond_;
116 activity::MutexImpl* const mutex_;
117 const double timeout_;
120 ConditionWaitSimcall(smx_actor_t actor, activity::ConditionVariableImpl* cond, activity::MutexImpl* mutex,
121 double timeout = -1.0)
122 : ResultingSimcall(actor, false), cond_(cond), mutex_(mutex), timeout_(timeout)
125 SimcallObserver* clone() override { return new ConditionWaitSimcall(get_issuer(), cond_, mutex_, timeout_); }
126 bool is_enabled() const override;
127 bool is_visible() const override { return false; }
128 std::string to_string(int times_considered) const override;
129 std::string dot_label() const override;
130 activity::ConditionVariableImpl* get_cond() const { return cond_; }
131 activity::MutexImpl* get_mutex() const { return mutex_; }
132 double get_timeout() const { return timeout_; }
135 class SemAcquireSimcall : public ResultingSimcall<bool> {
136 activity::SemaphoreImpl* const sem_;
137 const double timeout_;
140 SemAcquireSimcall(smx_actor_t actor, activity::SemaphoreImpl* sem, double timeout = -1.0)
141 : ResultingSimcall(actor, false), sem_(sem), timeout_(timeout)
144 SimcallObserver* clone() override { return new SemAcquireSimcall(get_issuer(), sem_, timeout_); }
145 bool is_enabled() const override;
146 bool is_visible() const override { return false; }
147 std::string to_string(int times_considered) const override;
148 std::string dot_label() const override;
149 activity::SemaphoreImpl* get_sem() const { return sem_; }
150 double get_timeout() const { return timeout_; }
153 class ActivityWaitSimcall : public ResultingSimcall<bool> {
154 activity::ActivityImpl* const activity_;
155 const double timeout_;
158 ActivityWaitSimcall(smx_actor_t actor, activity::ActivityImpl* activity, double timeout)
159 : ResultingSimcall(actor, false), activity_(activity), timeout_(timeout)
162 SimcallObserver* clone() override { return new ActivityWaitSimcall(get_issuer(), activity_, timeout_); }
163 bool is_visible() const override { return false; }
164 std::string to_string(int times_considered) const override { return SimcallObserver::to_string(times_considered); }
165 std::string dot_label() const override { return SimcallObserver::dot_label(); }
166 activity::ActivityImpl* get_activity() const { return activity_; }
167 double get_timeout() const { return timeout_; }
170 class ExecutionWaitanySimcall : public ResultingSimcall<int> {
171 const std::vector<activity::ExecImpl*>& execs_;
172 const double timeout_;
175 ExecutionWaitanySimcall(smx_actor_t actor, const std::vector<activity::ExecImpl*>& execs, double timeout)
176 : ResultingSimcall(actor, -1), execs_(execs), timeout_(timeout)
179 SimcallObserver* clone() override { return new ExecutionWaitanySimcall(get_issuer(), execs_, timeout_); }
180 bool is_visible() const override { return false; }
181 std::string to_string(int times_considered) const override;
182 std::string dot_label() const override;
183 const std::vector<activity::ExecImpl*>& get_execs() const { return execs_; }
184 double get_timeout() const { return timeout_; }
187 class IoWaitanySimcall : public ResultingSimcall<int> {
188 const std::vector<activity::IoImpl*>& ios_;
189 const double timeout_;
192 IoWaitanySimcall(smx_actor_t actor, const std::vector<activity::IoImpl*>& ios, double timeout)
193 : ResultingSimcall(actor, -1), ios_(ios), timeout_(timeout)
196 SimcallObserver* clone() override { return new IoWaitanySimcall(get_issuer(), ios_, timeout_); }
197 bool is_visible() const override { return false; }
198 std::string to_string(int times_considered) const override;
199 std::string dot_label() const override;
200 const std::vector<activity::IoImpl*>& get_ios() const { return ios_; }
201 double get_timeout() const { return timeout_; }
204 } // namespace kernel
205 } // namespace simgrid