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[simgrid.git] / src / simix / smx_private.h
1 /* Copyright (c) 2007-2010, 2012-2014. The SimGrid Team.
2  * All rights reserved.                                                     */
3
4 /* This program is free software; you can redistribute it and/or modify it
5  * under the terms of the license (GNU LGPL) which comes with this package. */
6
7 #ifndef _SIMIX_PRIVATE_H
8 #define _SIMIX_PRIVATE_H
9
10 #include "simgrid/simix.h"
11 #include "surf/surf.h"
12 #include "xbt/fifo.h"
13 #include "xbt/swag.h"
14 #include "xbt/dict.h"
15 #include "xbt/mallocator.h"
16 #include "xbt/config.h"
17 #include "xbt/xbt_os_time.h"
18 #include "xbt/function_types.h"
19 #include "xbt/ex_interface.h"
20 #include "instr/instr_private.h"
21 #include "smx_process_private.h"
22 #include "smx_host_private.h"
23 #include "smx_io_private.h"
24 #include "smx_network_private.h"
25 #include "smx_smurf_private.h"
26 #include "smx_synchro_private.h"
27 /* ****************************************************************************************** */
28 /* TUTORIAL: New API                                                                        */
29 /* ****************************************************************************************** */
30 #include "smx_new_api_private.h"
31
32 /* Define only for SimGrid benchmarking purposes */
33 //#define TIME_BENCH_PER_SR /* this aims at measuring the time spent in each scheduling round per each thread. The code is thus run in sequential to bench separately each SSR */
34 //#define TIME_BENCH_AMDAHL /* this aims at measuring the porting of time that could be parallelized at maximum (to get the optimal speedup by applying the amdahl law). */
35
36 /********************************** Simix Global ******************************/
37 typedef struct s_smx_global {
38   smx_context_factory_t context_factory;
39   xbt_dynar_t process_to_run;
40   xbt_dynar_t process_that_ran;
41   xbt_swag_t process_list;
42   xbt_swag_t process_to_destroy;
43   smx_process_t maestro_process;
44   xbt_dict_t registered_functions;
45   smx_creation_func_t create_process_function;
46   void_pfn_smxprocess_t_smxprocess_t kill_process_function;
47   void_pfn_smxprocess_t cleanup_process_function;
48   xbt_mallocator_t action_mallocator;
49   void_pfn_smxhost_t autorestart;
50
51 #ifdef TIME_BENCH_AMDAHL
52   xbt_os_timer_t timer_seq; /* used to bench the sequential and parallel parts of the simulation, if requested to */
53   xbt_os_timer_t timer_par;
54 #endif
55 } s_smx_global_t, *smx_global_t;
56
57 extern smx_global_t simix_global;
58 extern unsigned long simix_process_maxpid;
59
60 extern xbt_dict_t watched_hosts_lib;
61
62 #ifdef __cplusplus
63 extern "C" {
64 #endif
65 void SIMIX_clean(void);
66 #ifdef __cplusplus
67 }
68 #endif
69
70 /******************************** Exceptions *********************************/
71
72 #define SMX_EXCEPTION(issuer, c, v, m)                                  \
73   if (1) {                                                              \
74     smx_process_t _smx_throw_issuer = (issuer);                         \
75     THROW_PREPARE(_smx_throw_issuer->running_ctx, (c), (v), xbt_strdup(m)); \
76     _smx_throw_issuer->doexception = 1;                                 \
77   } else ((void)0)
78
79 #define SMX_THROW() RETHROW
80
81 /* ******************************** File ************************************ */
82 typedef struct s_smx_file {
83   surf_file_t surf_file;
84   void* data;                   /**< @brief user data */
85 } s_smx_file_t;
86
87 /*********************************** Time ************************************/
88
89 /** @brief Timer datatype */
90 typedef struct s_smx_timer {
91   double date;
92   void* func;
93   void* args;
94 } s_smx_timer_t;
95
96 /********************************* Action *************************************/
97
98 typedef enum {
99   SIMIX_ACTION_EXECUTE,
100   SIMIX_ACTION_PARALLEL_EXECUTE,
101   SIMIX_ACTION_COMMUNICATE,
102   SIMIX_ACTION_SLEEP,
103   SIMIX_ACTION_SYNCHRO,
104   SIMIX_ACTION_IO,
105   /* ****************************************************************************************** */
106   /* TUTORIAL: New API                                                                        */
107   /* ****************************************************************************************** */
108   SIMIX_ACTION_NEW_API
109 } e_smx_action_type_t;
110
111 typedef enum {
112   SIMIX_COMM_SEND,
113   SIMIX_COMM_RECEIVE,
114   SIMIX_COMM_READY,
115   SIMIX_COMM_DONE
116 } e_smx_comm_type_t;
117
118 typedef enum {
119   SIMIX_IO_OPEN,
120   SIMIX_IO_WRITE,
121   SIMIX_IO_READ,
122   SIMIX_IO_STAT
123 } e_smx_io_type_t;
124
125 /** @brief Action datatype */
126 typedef struct s_smx_action {
127
128   e_smx_action_type_t type;          /* Type of SIMIX action*/
129   e_smx_state_t state;               /* State of the action */
130   char *name;                        /* Action name if any */
131   xbt_fifo_t simcalls;               /* List of simcalls waiting for this action */
132
133   /* Data specific to each action type */
134   union {
135
136     struct {
137       smx_host_t host;                /* The host where the execution takes place */
138       surf_action_t surf_exec;        /* The Surf execution action encapsulated */
139     } execution; /* Possibly parallel execution */
140
141     struct {
142       e_smx_comm_type_t type;         /* Type of the communication (SIMIX_COMM_SEND or SIMIX_COMM_RECEIVE) */
143       smx_rdv_t rdv;                  /* Rendez-vous where the comm is queued */
144
145 #ifdef HAVE_MC
146       smx_rdv_t rdv_cpy;              /* Copy of the rendez-vous where the comm is queued, MC needs it for DPOR
147                                          (comm.rdv set to NULL when the communication is removed from the mailbox
148                                          (used as garbage collector)) */
149 #endif
150       int refcount;                   /* Number of processes involved in the cond */
151       int detached;                   /* If detached or not */
152
153       void (*clean_fun)(void*);       /* Function to clean the detached src_buf if something goes wrong */
154       int (*match_fun)(void*,void*,smx_action_t);  /* Filter function used by the other side. It is used when
155                                          looking if a given communication matches my needs. For that, myself must match the
156                                          expectations of the other side, too. See  */
157
158       /* Surf action data */
159       surf_action_t surf_comm;        /* The Surf communication action encapsulated */
160       surf_action_t src_timeout;      /* Surf's actions to instrument the timeouts */
161       surf_action_t dst_timeout;      /* Surf's actions to instrument the timeouts */
162       smx_process_t src_proc;
163       smx_process_t dst_proc;
164       double rate;
165       double task_size;
166
167       /* Data to be transfered */
168       void *src_buff;
169       void *dst_buff;
170       size_t src_buff_size;
171       size_t *dst_buff_size;
172       unsigned copied:1;              /* whether the data were already copied */
173
174       void* src_data;                 /* User data associated to communication */
175       void* dst_data;
176     } comm;
177
178     struct {
179       smx_host_t host;                /* The host that is sleeping */
180       surf_action_t surf_sleep;       /* The Surf sleeping action encapsulated */
181     } sleep;
182
183     struct {
184       surf_action_t sleep;
185     } synchro;
186
187     struct {
188       smx_host_t host;
189       surf_action_t surf_io;
190     } io;
191
192     /* ****************************************************************************************** */
193     /* TUTORIAL: New API                                                                        */
194     /* ****************************************************************************************** */
195     struct {
196       surf_action_t surf_new_api;
197     } new_api;
198   };
199
200 #ifdef HAVE_LATENCY_BOUND_TRACKING
201   int latency_limited;
202 #endif
203
204 #ifdef HAVE_TRACING
205   char *category;                     /* simix action category for instrumentation */
206 #endif
207 } s_smx_action_t;
208
209 void SIMIX_context_mod_init(void);
210 void SIMIX_context_mod_exit(void);
211
212 #ifndef WIN32
213 XBT_PUBLIC_DATA(char sigsegv_stack[SIGSTKSZ]);
214 #endif
215
216 /* We are using the bottom of the stack to save some information, like the
217  * valgrind_stack_id. Define smx_context_usable_stack_size to give the remaining
218  * size for the stack. */
219 #ifdef HAVE_VALGRIND_VALGRIND_H
220 # define smx_context_usable_stack_size                                  \
221   (smx_context_stack_size - sizeof(unsigned int)) /* for valgrind_stack_id */
222 #else
223 # define smx_context_usable_stack_size smx_context_stack_size
224 #endif
225
226 void *SIMIX_context_stack_new(void);
227 void SIMIX_context_stack_delete(void *stack);
228
229 void SIMIX_context_set_current(smx_context_t context);
230 smx_context_t SIMIX_context_get_current(void);
231
232 /* All factories init */
233
234 void SIMIX_ctx_thread_factory_init(smx_context_factory_t *factory);
235 void SIMIX_ctx_sysv_factory_init(smx_context_factory_t *factory);
236 void SIMIX_ctx_raw_factory_init(smx_context_factory_t *factory);
237
238 /* ****************************** */
239 /* context manipulation functions */
240 /* ****************************** */
241
242 /* Scenario for the end of a context:
243  *
244  * CASE 1: death after end of the main function
245  *   the context_wrapper, called internally by the context module, calls
246  *   SIMIX_context_stop after user code stops, smx_context_stop calls user
247  *   cleanup_func if any (in context settings), add current process to trashbin
248  *   and yields back to maestro.
249  *   From time to time, maestro calls SIMIX_context_empty_trash, which destroy
250  *   all the process and context data structures, and frees the memory
251  *
252  * CASE 2: brutal death
253  *   SIMIX_process_kill (from any process) set process->iwannadie = 1 and then
254  *   schedules the process. Then the process is awaken in the middle of the
255  *   SIMIX_process_yield function, and at the end of it, it checks that
256  *   iwannadie == 1, and call SIMIX_context_stop(same than first case afterward)
257  */
258
259 /**
260  * \brief creates a new context for a user level process
261  * \param code a main function
262  * \param argc the number of arguments of the main function
263  * \param argv the vector of arguments of the main function
264  * \param cleanup_func the function to call when the context stops
265  * \param cleanup_arg the argument of the cleanup_func function
266  */
267 static XBT_INLINE smx_context_t SIMIX_context_new(xbt_main_func_t code,
268                                                   int argc, char **argv,
269                                                   void_pfn_smxprocess_t cleanup_func,
270                                                   smx_process_t simix_process)
271 {
272   if (!simix_global)
273     xbt_die("simix is not initialized, please call MSG_init first");
274   return simix_global->context_factory->create_context(code,
275                                                        argc, argv,
276                                                        cleanup_func,
277                                                        simix_process);
278 }
279
280 /**
281  * \brief destroy a context
282  * \param context the context to destroy
283  * Argument must be stopped first -- runs in maestro context
284  */
285 static XBT_INLINE void SIMIX_context_free(smx_context_t context)
286 {
287   simix_global->context_factory->free(context);
288 }
289
290 /**
291  * \brief stops the execution of a context
292  * \param context to stop
293  */
294 static XBT_INLINE void SIMIX_context_stop(smx_context_t context)
295 {
296   simix_global->context_factory->stop(context);
297 }
298
299 /**
300  \brief suspends a context and return the control back to the one which
301         scheduled it
302  \param context the context to be suspended (it must be the running one)
303  */
304 static XBT_INLINE void SIMIX_context_suspend(smx_context_t context)
305 {
306   simix_global->context_factory->suspend(context);
307 }
308
309 /**
310  \brief Executes all the processes to run (in parallel if possible).
311  */
312 static XBT_INLINE void SIMIX_context_runall(void)
313 {
314   if (!xbt_dynar_is_empty(simix_global->process_to_run)) {
315     simix_global->context_factory->runall();
316   }
317 }
318
319 /**
320  \brief returns the current running context
321  */
322 static XBT_INLINE smx_context_t SIMIX_context_self(void)
323 {
324   if (simix_global && simix_global->context_factory) {
325     return simix_global->context_factory->self();
326   }
327   return NULL;
328 }
329
330 /**
331  \brief returns the SIMIX process associated to a context
332  \param context The context
333  \return The SIMIX process
334  */
335 static XBT_INLINE smx_process_t SIMIX_context_get_process(smx_context_t context)
336 {
337   return simix_global->context_factory->get_process(context);
338 }
339
340 XBT_PUBLIC(int) SIMIX_process_get_maxpid(void);
341
342 void SIMIX_post_create_environment(void);
343
344 #endif