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"
21 /******************************** Datatypes ***********************************/
24 /*********************************** Host *************************************/
26 /** @brief Host datatype
27 @ingroup m_datatypes_management_details */
28 typedef struct s_smx_host {
29 char *name; /**< @brief host name if any */
30 void *host; /* SURF modeling */
31 xbt_swag_t process_list;
32 void *data; /**< @brief user data */
35 /********************************** Simix Global ******************************/
37 typedef struct s_smx_context_factory *smx_context_factory_t;
39 typedef struct SIMIX_Global {
40 smx_context_factory_t context_factory;
42 xbt_swag_t process_to_run;
43 xbt_swag_t process_list;
44 xbt_swag_t process_to_destroy;
45 smx_process_t current_process;
46 smx_process_t maestro_process;
47 xbt_dict_t registered_functions;
48 smx_creation_func_t create_process_function;
49 void_f_pvoid_t kill_process_function;
50 void_f_pvoid_t cleanup_process_function;
51 } s_SIMIX_Global_t, *SIMIX_Global_t;
53 extern SIMIX_Global_t simix_global;
55 /******************************** Process *************************************/
57 typedef struct s_smx_context *smx_context_t;
59 /** @brief Process datatype
60 @ingroup m_datatypes_management_details @{ */
61 typedef struct s_smx_process {
62 s_xbt_swag_hookup_t process_hookup;
63 s_xbt_swag_hookup_t synchro_hookup;
64 s_xbt_swag_hookup_t host_proc_hookup;
65 s_xbt_swag_hookup_t destroy_hookup;
67 char *name; /**< @brief process name if any */
68 smx_host_t smx_host; /* the host on which the process is running */
69 smx_context_t context; /* the context that executes the scheduler function */
70 int argc; /* arguments number if any */
71 char **argv; /* arguments table if any */
75 smx_mutex_t mutex; /* mutex on which the process is blocked */
76 smx_cond_t cond; /* cond on which the process is blocked */
77 xbt_dict_t properties;
78 void *data; /* kept for compatibility, it should be replaced with moddata */
79 void_f_pvoid_t cleanup_func;
85 typedef struct s_smx_process_arg {
93 xbt_dict_t properties;
94 } s_smx_process_arg_t, *smx_process_arg_t;
96 void SIMIX_process_empty_trash(void);
97 void __SIMIX_process_schedule(smx_process_t process);
98 void __SIMIX_process_yield(void);
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 /********************************* Action *************************************/
123 /** @brief Action datatype
124 @ingroup m_datatypes_management_details */
125 typedef struct s_smx_action {
126 char *name; /**< @brief action name if any */
127 xbt_fifo_t cond_list; /*< conditional variables that must be signaled when the action finish. */
128 void *data; /**< @brief user data */
129 int refcount; /**< @brief reference counter */
130 surf_action_t surf_action; /* SURF modeling of computation */
134 /************************** Configuration support *****************************/
136 extern int _simix_init_status; /* 0: beginning of time; FIXME: KILLME ?
137 1: pre-inited (cfg_set created);
138 2: inited (running) */
140 #define SIMIX_CHECK_HOST() xbt_assert0(surf_workstation_model->extension.workstation. \
141 get_state(SIMIX_host_self()->host)==SURF_RESOURCE_ON,\
142 "Host failed, you cannot call this function.")
144 smx_host_t __SIMIX_host_create(const char *name, void *workstation, void *data);
145 void __SIMIX_host_destroy(void *host);
146 void __SIMIX_cond_wait(smx_cond_t cond);
147 void __SIMIX_cond_display_actions(smx_cond_t cond);
148 void __SIMIX_action_display_conditions(smx_action_t action);
149 void __SIMIX_create_maestro_process(void);
151 /******************************** Context *************************************/
153 void SIMIX_context_mod_init(void);
155 void SIMIX_context_mod_exit(void);
157 /* *********************** */
158 /* Context type definition */
159 /* *********************** */
160 /* the following function pointers types describe the interface that all context
161 concepts must implement */
163 /* each context type must contain this macro at its begining -- OOP in C :/ */
164 #define SMX_CTX_BASE_T \
165 s_xbt_swag_hookup_t hookup; \
166 ex_ctx_t *exception; \
167 xbt_main_func_t code; \
169 /* all other context types derive from this structure */
170 typedef struct s_smx_context {
174 /* *********************** */
175 /* factory type definition */
176 /* *********************** */
178 /* Each context implementation define its own context factory
179 * A context factory is responsable of the creation and manipulation of the
180 * execution context of all the simulated processes (and maestro) using the
181 * selected implementation.
183 * For example, the context switch based on java thread use the
184 * java implementation of the context and the java factory to build and control
185 * the contexts depending on this implementation.
187 * The following function pointer types describe the interface that any context
188 * factory should implement.
191 /* function used to create a new context */
192 typedef int (*smx_pfn_context_factory_create_context_t) (smx_process_t *, xbt_main_func_t);
194 /* function used to create the context for the maestro process */
195 typedef int (*smx_pfn_context_factory_create_maestro_context_t) (smx_process_t*);
197 /* this function finalize the specified context factory */
198 typedef int (*smx_pfn_context_factory_finalize_t) (smx_context_factory_t*);
200 /* function used to destroy the specified context */
201 typedef void (*smx_pfn_context_free_t) (smx_process_t);
203 /* function used to kill the specified context */
204 typedef void (*smx_pfn_context_kill_t) (smx_process_t);
206 /* function used to resume the specified context */
207 typedef void (*smx_pfn_context_schedule_t) (smx_process_t);
209 /* function used to yield the specified context */
210 typedef void (*smx_pfn_context_yield_t) (void);
212 /* function used to start the specified context */
213 typedef void (*smx_pfn_context_start_t) (smx_process_t);
215 /* function used to stop the current context */
216 typedef void (*smx_pfn_context_stop_t) (int);
218 /* interface of the context factories */
219 typedef struct s_smx_context_factory {
220 smx_pfn_context_factory_create_maestro_context_t create_maestro_context;
221 smx_pfn_context_factory_create_context_t create_context;
222 smx_pfn_context_factory_finalize_t finalize;
223 smx_pfn_context_free_t free;
224 smx_pfn_context_kill_t kill;
225 smx_pfn_context_schedule_t schedule;
226 smx_pfn_context_yield_t yield;
227 smx_pfn_context_start_t start;
228 smx_pfn_context_stop_t stop;
230 } s_smx_context_factory_t;
232 /* Selects a context factory associated with the name specified by the parameter name.
233 * If successful the function returns 0. Otherwise the function returns the error code.
235 int SIMIX_context_select_factory(const char *name);
237 /* Initializes a context factory from the name specified by the parameter name.
238 * If the factory cannot be found, an exception is raised.
240 void SIMIX_context_init_factory_by_name(smx_context_factory_t * factory, const char *name);
242 /* All factories init */
243 void SIMIX_ctx_thread_factory_init(smx_context_factory_t * factory);
245 void SIMIX_ctx_sysv_factory_init(smx_context_factory_t * factory);
247 void SIMIX_ctx_java_factory_init(smx_context_factory_t * factory);
249 /* ******************************* */
250 /* contexts manipulation functions */
251 /* ******************************* */
254 * \param smx_process the simix maestro process that contains this context
256 static inline int SIMIX_context_create_maestro(smx_process_t *process)
258 return (*(simix_global->context_factory->create_maestro_context)) (process);
262 * \param smx_process the simix process that contains this context
263 * \param code a main function
265 static inline int SIMIX_context_new(smx_process_t *process, xbt_main_func_t code)
267 return (*(simix_global->context_factory->create_context)) (process, code);
270 /* Scenario for the end of a context:
272 * CASE 1: death after end of function
273 * __context_wrapper, called by os thread, calls smx_context_stop after user code stops
274 * smx_context_stop calls user cleanup_func if any (in context settings),
275 * add current to trashbin
276 * yields back to maestro (destroy os thread on need)
277 * From time to time, maestro calls smx_context_empty_trash,
278 * which maps smx_context_free on the content
279 * smx_context_free frees some more memory,
282 * CASE 2: brutal death
283 * smx_context_kill (from any context)
284 * set context->wannadie to 1
285 * yields to the context
286 * the context is awaken in the middle of __yield.
287 * At the end of it, it checks that wannadie == 1, and call smx_context_stop
288 * (same than first case afterward)
290 static inline void SIMIX_context_kill(smx_process_t process)
292 (*(simix_global->context_factory->kill)) (process);
295 /* Argument must be stopped first -- runs in maestro context */
296 static inline void SIMIX_context_free(smx_process_t process)
298 (*(simix_global->context_factory->free)) (process);
302 * \param context the context to start
304 * Calling this function prepares \a process to be run. It will
305 however run effectively only when calling #SIMIX_context_schedule
307 static inline void SIMIX_context_start(smx_process_t process)
309 (*(simix_global->context_factory->start)) (process);
313 * Calling this function makes the current process yield. The process
314 * that scheduled it returns from SIMIX_context_schedule as if nothing
317 * Only the processes can call this function, giving back the control
320 static inline void SIMIX_context_yield(void)
322 (*(simix_global->context_factory->yield)) ();
326 * \param process to be scheduled
328 * Calling this function blocks the current process and schedule \a process.
329 * When \a process would call SIMIX_context_yield, it will return
330 * to this function as if nothing had happened.
332 * Only the maestro can call this function to run a given process.
334 static inline void SIMIX_context_schedule(smx_process_t process)
336 (*(simix_global->context_factory->schedule)) (process);
339 static inline void SIMIX_context_stop(int exit_code)
341 (*(simix_global->context_factory->stop)) (exit_code);