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 /** Some simcalls may only be observable under some circumstances.
52 * Most simcalls are not visible from the MC because they don't have an observer at all. */
53 virtual bool is_visible() const { return true; }
54 virtual std::string to_string(int times_considered) const = 0;
55 virtual std::string dot_label() const = 0;
58 template <class T> class ResultingSimcall : public SimcallObserver {
62 ResultingSimcall(smx_actor_t actor, T default_result) : SimcallObserver(actor), result_(default_result) {}
63 void set_result(T res) { result_ = res; }
64 T get_result() const { return result_; }
67 class RandomSimcall : public SimcallObserver {
73 RandomSimcall(smx_actor_t actor, int min, int max) : SimcallObserver(actor), min_(min), max_(max) {}
74 int get_max_consider() const override;
75 void prepare(int times_considered) override;
76 std::string to_string(int times_considered) const override;
77 std::string dot_label() const override;
78 int get_value() const { return next_value_; }
81 class MutexUnlockSimcall : public SimcallObserver {
82 using SimcallObserver::SimcallObserver;
85 std::string to_string(int times_considered) const override;
86 std::string dot_label() const override;
89 class MutexLockSimcall : public SimcallObserver {
90 activity::MutexImpl* const mutex_;
94 MutexLockSimcall(smx_actor_t actor, activity::MutexImpl* mutex, bool blocking = true)
95 : SimcallObserver(actor), mutex_(mutex), blocking_(blocking)
98 bool is_enabled() const override;
99 std::string to_string(int times_considered) const override;
100 std::string dot_label() const override;
101 activity::MutexImpl* get_mutex() const { return mutex_; }
104 class ConditionWaitSimcall : public ResultingSimcall<bool> {
105 activity::ConditionVariableImpl* const cond_;
106 activity::MutexImpl* const mutex_;
107 const double timeout_;
110 ConditionWaitSimcall(smx_actor_t actor, activity::ConditionVariableImpl* cond, activity::MutexImpl* mutex,
111 double timeout = -1.0)
112 : ResultingSimcall(actor, false), cond_(cond), mutex_(mutex), timeout_(timeout)
115 bool is_enabled() const override;
116 bool is_visible() const override { return false; }
117 std::string to_string(int times_considered) const override;
118 std::string dot_label() const override;
119 activity::ConditionVariableImpl* get_cond() const { return cond_; }
120 activity::MutexImpl* get_mutex() const { return mutex_; }
121 double get_timeout() const { return timeout_; }
124 class SemAcquireSimcall : public ResultingSimcall<bool> {
125 activity::SemaphoreImpl* const sem_;
126 const double timeout_;
129 SemAcquireSimcall(smx_actor_t actor, activity::SemaphoreImpl* sem, double timeout = -1.0)
130 : ResultingSimcall(actor, false), sem_(sem), timeout_(timeout)
133 bool is_enabled() const override;
134 bool is_visible() const override { return false; }
135 std::string to_string(int times_considered) const override;
136 std::string dot_label() const override;
137 activity::SemaphoreImpl* get_sem() const { return sem_; }
138 double get_timeout() const { return timeout_; }
141 class ExecutionWaitanySimcall : public ResultingSimcall<int> {
142 const std::vector<activity::ExecImpl*>& execs_;
143 const double timeout_;
146 ExecutionWaitanySimcall(smx_actor_t actor, const std::vector<activity::ExecImpl*>& execs, double timeout)
147 : ResultingSimcall(actor, -1), execs_(execs), timeout_(timeout)
150 bool is_visible() const override { return false; }
151 std::string to_string(int times_considered) const override;
152 std::string dot_label() const override;
153 const std::vector<activity::ExecImpl*>& get_execs() const { return execs_; }
154 double get_timeout() const { return timeout_; }
157 class IoWaitanySimcall : public ResultingSimcall<int> {
158 const std::vector<activity::IoImpl*>& ios_;
159 const double timeout_;
162 IoWaitanySimcall(smx_actor_t actor, const std::vector<activity::IoImpl*>& ios, double timeout)
163 : ResultingSimcall(actor, -1), ios_(ios), timeout_(timeout)
166 bool is_visible() const override { return false; }
167 std::string to_string(int times_considered) const override;
168 std::string dot_label() const override;
169 const std::vector<activity::IoImpl*>& get_ios() const { return ios_; }
170 double get_timeout() const { return timeout_; }
173 } // namespace kernel
174 } // namespace simgrid