3 /* Copyright (c) 2007 Arnaud Legrand, Bruno Donnassolo.
4 All rights reserved. */
6 /* This program is free software; you can redistribute it and/or modify it
7 * under the terms of the license (GNU LGPL) which comes with this package. */
9 #ifndef SIMIX_PRIVATE_H
10 #define SIMIX_PRIVATE_H
13 #include "simix/simix.h"
14 #include "surf/surf.h"
18 #include "xbt/config.h"
19 #include "xbt/function_types.h"
20 #include "xbt/ex_interface.h"
22 /******************************** Datatypes ***********************************/
25 /*********************************** Host *************************************/
27 /** @brief Host datatype
28 @ingroup m_datatypes_management_details */
29 typedef struct s_smx_host {
30 char *name; /**< @brief host name if any */
31 void *host; /* SURF modeling */
32 xbt_swag_t process_list;
33 void *data; /**< @brief user data */
36 /********************************** Simix Global ******************************/
38 typedef struct s_smx_context_factory *smx_context_factory_t;
40 typedef struct SIMIX_Global {
41 smx_context_factory_t context_factory;
43 xbt_swag_t process_to_run;
44 xbt_swag_t process_list;
45 xbt_swag_t process_to_destroy;
46 smx_process_t current_process;
47 smx_process_t maestro_process;
48 xbt_dict_t registered_functions;
49 smx_creation_func_t create_process_function;
50 void_f_pvoid_t kill_process_function;
51 void_f_pvoid_t cleanup_process_function;
52 } s_SIMIX_Global_t, *SIMIX_Global_t;
54 extern SIMIX_Global_t simix_global;
56 /******************************** Process *************************************/
58 /** @brief Process datatype
59 @ingroup m_datatypes_management_details @{ */
60 typedef struct s_smx_process {
61 s_xbt_swag_hookup_t process_hookup;
62 s_xbt_swag_hookup_t synchro_hookup;
63 s_xbt_swag_hookup_t host_proc_hookup;
64 s_xbt_swag_hookup_t destroy_hookup;
66 char *name; /**< @brief process name if any */
67 smx_host_t smx_host; /* the host on which the process is running */
68 smx_context_t context; /* the context that executes the scheduler function */
73 smx_mutex_t mutex; /* mutex on which the process is blocked */
74 smx_cond_t cond; /* cond on which the process is blocked */
75 smx_action_t waiting_action;
76 xbt_dict_t properties;
77 void *data; /* kept for compatibility, it should be replaced with moddata */
82 typedef struct s_smx_process_arg {
90 xbt_dict_t properties;
91 } s_smx_process_arg_t, *smx_process_arg_t;
93 void SIMIX_create_maestro_process(void);
94 void SIMIX_process_empty_trash(void);
95 void SIMIX_process_schedule(smx_process_t process);
96 void SIMIX_process_yield(void);
97 ex_ctx_t *SIMIX_process_get_exception(void);
98 void SIMIX_process_exception_terminate(xbt_ex_t * e);
100 /*************************** Mutex and Conditional ****************************/
102 typedef struct s_smx_mutex {
104 /* KEEP IT IN SYNC WITH src/xbt_sg_thread.c::struct s_xbt_mutex */
105 xbt_swag_t sleeping; /* list of sleeping process */
107 /* KEEP IT IN SYNC WITH src/xbt_sg_thread.c::struct s_xbt_mutex */
111 typedef struct s_smx_cond {
113 /* KEEP IT IN SYNC WITH src/xbt_sg_thread.c::struct s_xbt_cond */
114 xbt_swag_t sleeping; /* list of sleeping process */
116 xbt_fifo_t actions; /* list of actions */
117 /* KEEP IT IN SYNC WITH src/xbt_sg_thread.c::struct s_xbt_cond */
121 /******************************* Networking ***********************************/
123 /** @brief Rendez-vous point datatype */
124 typedef struct s_smx_rvpoint {
128 xbt_fifo_t comm_fifo;
131 typedef struct s_smx_comm {
132 smx_comm_type_t type;
139 size_t src_buff_size;
141 size_t *dst_buff_size;
147 /********************************* Action *************************************/
149 typedef enum {ready, ongoing, done, failed} smx_action_state_t;
151 /** @brief Action datatype
152 @ingroup m_datatypes_management_details */
153 typedef struct s_smx_action {
154 char *name; /**< @brief action name if any */
155 xbt_fifo_t cond_list; /*< conditional variables that must be signaled when the action finish. */
156 void *data; /**< @brief user data */
157 int refcount; /**< @brief reference counter */
158 surf_action_t surf_action; /* SURF modeling of computation */
162 /************************** Configuration support *****************************/
164 extern int _simix_init_status; /* 0: beginning of time; FIXME: KILLME ?
165 1: pre-inited (cfg_set created);
166 2: inited (running) */
168 #define SIMIX_CHECK_HOST() xbt_assert0(surf_workstation_model->extension.workstation. \
169 get_state(SIMIX_host_self()->host)==SURF_RESOURCE_ON,\
170 "Host failed, you cannot call this function.")
172 smx_host_t __SIMIX_host_create(const char *name, void *workstation, void *data);
173 void __SIMIX_host_destroy(void *host);
174 void __SIMIX_cond_wait(smx_cond_t cond);
175 void __SIMIX_cond_display_actions(smx_cond_t cond);
176 void __SIMIX_action_display_conditions(smx_action_t action);
178 /******************************** Context *************************************/
180 void SIMIX_context_mod_init(void);
182 void SIMIX_context_mod_exit(void);
184 /* *********************** */
185 /* Context type definition */
186 /* *********************** */
187 /* the following function pointers types describe the interface that all context
188 concepts must implement */
190 /* each context type must contain this macro at its begining -- OOP in C :/ */
191 #define SMX_CTX_BASE_T \
192 s_xbt_swag_hookup_t hookup; \
193 xbt_main_func_t code; \
196 void_f_pvoid_t cleanup_func; \
199 /* all other context types derive from this structure */
200 typedef struct s_smx_context {
204 /* *********************** */
205 /* factory type definition */
206 /* *********************** */
208 /* Each context implementation define its own context factory
209 * A context factory is responsable of the creation and manipulation of the
210 * execution context of all the simulated processes (and maestro) using the
211 * selected implementation.
213 * For example, the context switch based on java thread use the
214 * java implementation of the context and the java factory to build and control
215 * the contexts depending on this implementation.
217 * The following function pointer types describe the interface that any context
218 * factory should implement.
221 /* function used to create a new context */
222 typedef smx_context_t (*smx_pfn_context_factory_create_context_t)
223 (xbt_main_func_t, int, char**, void_f_pvoid_t, void*);
225 /* this function finalize the specified context factory */
226 typedef int (*smx_pfn_context_factory_finalize_t) (smx_context_factory_t*);
228 /* function used to destroy the specified context */
229 typedef void (*smx_pfn_context_free_t) (smx_context_t);
231 /* function used to start the specified context */
232 typedef void (*smx_pfn_context_start_t) (smx_context_t);
234 /* function used to stop the current context */
235 typedef void (*smx_pfn_context_stop_t) (smx_context_t);
237 /* function used to suspend the current context */
238 typedef void (*smx_pfn_context_suspend_t) (smx_context_t context);
240 /* function used to resume the current context */
241 typedef void (*smx_pfn_context_resume_t) (smx_context_t old_context,
242 smx_context_t new_context);
244 /* interface of the context factories */
245 typedef struct s_smx_context_factory {
246 smx_pfn_context_factory_create_context_t create_context;
247 smx_pfn_context_factory_finalize_t finalize;
248 smx_pfn_context_free_t free;
249 smx_pfn_context_start_t start;
250 smx_pfn_context_stop_t stop;
251 smx_pfn_context_suspend_t suspend;
252 smx_pfn_context_resume_t resume;
254 } s_smx_context_factory_t;
256 /* Selects a context factory associated with the name specified by the parameter name.
257 * If successful the function returns 0. Otherwise the function returns the error code.
259 int SIMIX_context_select_factory(const char *name);
261 /* Initializes a context factory from the name specified by the parameter name.
262 * If the factory cannot be found, an exception is raised.
264 void SIMIX_context_init_factory_by_name(smx_context_factory_t * factory, const char *name);
266 /* All factories init */
267 void SIMIX_ctx_thread_factory_init(smx_context_factory_t * factory);
269 void SIMIX_ctx_sysv_factory_init(smx_context_factory_t * factory);
271 void SIMIX_ctx_java_factory_init(smx_context_factory_t * factory);
273 /* ****************************** */
274 /* context manipulation functions */
275 /* ****************************** */
277 /* Scenario for the end of a context:
279 * CASE 1: death after end of the main function
280 * the context_wrapper, called internally by the context module, calls
281 * SIMIX_context_stop after user code stops, smx_context_stop calls user
282 * cleanup_func if any (in context settings), add current process to trashbin
283 * and yields back to maestro.
284 * From time to time, maestro calls SIMIX_context_empty_trash, which destroy
285 * all the process and context data structures, and frees the memory
287 * CASE 2: brutal death
288 * SIMIX_process_kill (from any process) set process->iwannadie = 1 and then
289 * schedules the process. Then the process is awaken in the middle of the
290 * SIMIX_process_yield function, and at the end of it, it checks that
291 * iwannadie == 1, and call SIMIX_context_stop(same than first case afterward)
295 * \brief creates a new context for a user level process
296 * \param code a main function
297 * \param argc the number of arguments of the main function
298 * \param argv the vector of arguments of the main function
299 * \param cleanup_func the function to call when the context stops
300 * \param cleanup_arg the argument of the cleanup_func function
302 static inline smx_context_t SIMIX_context_new(xbt_main_func_t code, int argc,
304 void_f_pvoid_t cleanup_func,
307 return (*(simix_global->context_factory->create_context))
308 (code, argc, argv, cleanup_func, cleanup_arg);
312 * \brief destroy a context
313 * \param context the context to destroy
314 * Argument must be stopped first -- runs in maestro context
316 static inline void SIMIX_context_free(smx_context_t context)
318 (*(simix_global->context_factory->free)) (context);
322 * \brief prepares aa context to be run
323 * \param context the context to start
324 * It will however run effectively only when calling #SIMIX_process_schedule
326 static inline void SIMIX_context_start(smx_context_t context)
328 (*(simix_global->context_factory->start)) (context);
332 * \brief stops the execution of a context
333 * \param context to stop
335 static inline void SIMIX_context_stop(smx_context_t context)
337 (*(simix_global->context_factory->stop)) (context);
341 \brief resumes the execution of a context
342 \param old_context the actual context from which is resuming
343 \param new_context the context to resume
345 static inline void SIMIX_context_resume(smx_context_t old_context,
346 smx_context_t new_context)
348 (*(simix_global->context_factory->resume)) (old_context, new_context);
352 \brief suspends a context and return the control back to the one which
354 \param context the context to be suspended (it must be the running one)
356 static inline void SIMIX_context_suspend(smx_context_t context)
358 (*(simix_global->context_factory->suspend)) (context);