1 /* Copyright (c) 2007-2018. 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_KERNEL_CONTEXT_CONTEXT_HPP
7 #define SIMGRID_KERNEL_CONTEXT_CONTEXT_HPP
9 #include "instr/instr_interface.h"
10 #include "src/internal_config.h"
11 #include "src/simix/smx_network_private.hpp"
19 class XBT_PUBLIC ContextFactory {
24 explicit ContextFactory(std::string name) : name_(std::move(name)) {}
25 virtual ~ContextFactory();
26 virtual Context* create_context(std::function<void()> code, void_pfn_smxprocess_t cleanup, smx_actor_t process) = 0;
28 // Optional methods for attaching main() as a context:
30 /** Creates a context from the current context of execution
32 * This will not work on all implementation of `ContextFactory`.
34 virtual Context* attach(void_pfn_smxprocess_t cleanup_func, smx_actor_t process);
35 virtual Context* create_maestro(std::function<void()> code, smx_actor_t process);
37 virtual void run_all() = 0;
38 virtual Context* self();
39 std::string const& name() const { return name_; }
41 void declare_context(void* T, std::size_t size);
44 template <class T, class... Args> T* new_context(Args&&... args)
46 T* context = new T(std::forward<Args>(args)...);
47 this->declare_context(context, sizeof(T));
52 class XBT_PUBLIC Context {
54 std::function<void()> code_;
55 void_pfn_smxprocess_t cleanup_func_ = nullptr;
56 smx_actor_t process_ = nullptr;
60 /** @brief Exception launched to kill a process, in order to properly unwind its stack and release RAII stuff
62 * Nope, Sonar, this should not inherit of std::exception.
63 * Otherwise, users may accidentally catch it with a try {} catch (std::exception)
68 Context(std::function<void()> code, void_pfn_smxprocess_t cleanup_func, smx_actor_t process);
69 void operator()() { code_(); }
70 bool has_code() const { return static_cast<bool>(code_); }
71 smx_actor_t process() { return this->process_; }
72 void set_cleanup(void_pfn_smxprocess_t cleanup) { cleanup_func_ = cleanup; }
77 virtual void suspend() = 0;
80 class XBT_PUBLIC AttachContext : public Context {
82 AttachContext(std::function<void()> code, void_pfn_smxprocess_t cleanup_func, smx_actor_t process)
83 : Context(std::move(code), cleanup_func, process)
87 ~AttachContext() override;
89 /** Called by the context when it is ready to give control
92 virtual void attach_start() = 0;
94 /** Called by the context when it has finished its job */
95 virtual void attach_stop() = 0;
98 /* This allows Java to hijack the context factory (Java induces factories of factory :) */
99 typedef ContextFactory* (*ContextFactoryInitializer)();
100 XBT_PUBLIC_DATA ContextFactoryInitializer factory_initializer;
102 XBT_PRIVATE ContextFactory* thread_factory();
103 XBT_PRIVATE ContextFactory* sysv_factory();
104 XBT_PRIVATE ContextFactory* raw_factory();
105 XBT_PRIVATE ContextFactory* boost_factory();
109 typedef simgrid::kernel::context::ContextFactory *smx_context_factory_t;
111 XBT_PRIVATE void SIMIX_context_mod_init();
112 XBT_PRIVATE void SIMIX_context_mod_exit();
114 XBT_PUBLIC smx_context_t SIMIX_context_new(std::function<void()> code, void_pfn_smxprocess_t cleanup_func,
115 smx_actor_t simix_process);
118 XBT_PUBLIC_DATA char sigsegv_stack[SIGSTKSZ];
121 /* We are using the bottom of the stack to save some information, like the
122 * valgrind_stack_id. Define smx_context_usable_stack_size to give the remaining
123 * size for the stack. Round its value to a multiple of 16 (asan wants the stacks to be aligned this way). */
125 #define smx_context_usable_stack_size \
126 ((smx_context_stack_size - sizeof(unsigned int)) & ~0xf) /* for valgrind_stack_id */
128 #define smx_context_usable_stack_size (smx_context_stack_size & ~0xf)
131 /** @brief Executes all the processes to run (in parallel if possible). */
132 XBT_PRIVATE void SIMIX_context_runall();
133 /** @brief returns the current running context */
134 XBT_PUBLIC smx_context_t SIMIX_context_self(); // public because it's used in simgrid-java
136 XBT_PRIVATE void *SIMIX_context_stack_new();
137 XBT_PRIVATE void SIMIX_context_stack_delete(void *stack);
139 XBT_PUBLIC void SIMIX_context_set_current(smx_context_t context);
140 XBT_PRIVATE smx_context_t SIMIX_context_get_current();
142 XBT_PUBLIC int SIMIX_process_get_maxpid();
144 XBT_PRIVATE void SIMIX_post_create_environment();
146 XBT_PRIVATE simgrid::simix::ActorCodeFactory& SIMIX_get_actor_code_factory(const char *name);