/usr/include/Kokyu/DSRT_Direct_Dispatcher_Impl_T.cpp is in libkokyu-dev 6.3.3+dfsg-1.2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 | #ifndef DSRT_DIRECT_DISPATCHER_IMPL_T_CPP
#define DSRT_DIRECT_DISPATCHER_IMPL_T_CPP
#include "DSRT_Direct_Dispatcher_Impl_T.h"
#if !defined (__ACE_INLINE__)
//#include "DSRT_Direct_Dispatcher_Impl_T.i"
#endif /* __ACE_INLINE__ */
namespace Kokyu
{
/*
//@@VS: This is somehow not being recognized by MSVC, which results
//in a link error. For now, the definition has been moved to the .h
//file. Needs further investigation.
template <class DSRT_Scheduler_Traits>
int Comparator_Adapter_Generator<DSRT_Scheduler_Traits>::MoreEligible::
operator ()(const DSRT_Dispatch_Item_var<DSRT_Scheduler_Traits>& item1,
const DSRT_Dispatch_Item_var<DSRT_Scheduler_Traits>& item2)
{
int rc = qos_comparator_ (item1->qos (), item2->qos ());
//more eligible
if (rc == 1)
return 1;
//if equally eligible, then resolve tie with the creation time of
//the item
if (rc == 0 && item1->insertion_time () < item2->insertion_time ())
return 1;
return 0;
}
*/
template <class DSRT_Scheduler_Traits>
DSRT_Direct_Dispatcher_Impl<DSRT_Scheduler_Traits>::
DSRT_Direct_Dispatcher_Impl (ACE_Sched_Params::Policy sched_policy,
int sched_scope)
:DSRT_Dispatcher_Impl<DSRT_Scheduler_Traits>(sched_policy, sched_scope),
sched_queue_modified_ (0),
sched_queue_modified_cond_ (sched_queue_modified_cond_lock_)
{
//Run scheduler thread at highest priority
if (this->activate (this->rt_thr_flags_, 1, 0, this->executive_prio_) == -1)
{
ACE_ERROR ((LM_ERROR,
"(%t|%T) cannot activate scheduler thread in RT mode."
"Trying in non RT mode\n"));
if (this->activate (this->non_rt_thr_flags_) == -1)
ACE_ERROR ((LM_ERROR,
"(%t|%T) cannot activate scheduler thread\n"));
}
}
template <class DSRT_Scheduler_Traits> int
DSRT_Direct_Dispatcher_Impl<DSRT_Scheduler_Traits>::
init_i (const DSRT_ConfigInfo&)
{
return 0;
}
template <class DSRT_Scheduler_Traits> int
DSRT_Direct_Dispatcher_Impl<DSRT_Scheduler_Traits>::svc (void)
{
ACE_hthread_t scheduler_thr_handle;
ACE_Thread::self (scheduler_thr_handle);
#ifdef KOKYU_DSRT_LOGGING
int prio;
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("max prio=%d\n")
ACE_TEXT ("min prio=%d\n")
ACE_TEXT ("active prio=%d\n")
ACE_TEXT ("inactive prio=%d\n"),
max_prio_,
min_prio_,
active_prio_,
inactive_prio_));
if (ACE_OS::thr_getprio (scheduler_thr_handle, prio) == -1)
{
if (errno == ENOTSUP)
{
ACE_ERROR((LM_ERROR,
ACE_TEXT ("getprio not supported\n")
));
}
else
{
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("%p\n")
ACE_TEXT ("thr_getprio failed")));
}
}
ACE_DEBUG ((LM_DEBUG, "(%t): Scheduler thread prio is %d\n", prio));
#endif /*DSRT_LOGGING*/
while(1)
{
ACE_GUARD_RETURN (cond_lock_t,
mon,
sched_queue_modified_cond_lock_,
0);
if (this->shutdown_flagged_)
break;
while (!sched_queue_modified_)
{
#ifdef KOKYU_DSRT_LOGGING
ACE_DEBUG ((LM_DEBUG,
"(%t|%T): sched thread about to wait on cv\n"));
#endif
sched_queue_modified_cond_.wait ();
}
#ifdef KOKYU_DSRT_LOGGING
ACE_DEBUG ((LM_DEBUG, "(%t|%T): sched thread done waiting on cv\n"));
#endif
sched_queue_modified_ = 0;
ACE_GUARD_RETURN (ACE_SYNCH_RECURSIVE_MUTEX,
synch_lock_mon,
this->synch_lock_,
0);
if (this->ready_queue_.current_size () <= 0)
continue;
#ifdef KOKYU_DSRT_LOGGING
ACE_DEBUG ((LM_DEBUG, "(%t|%T):Sched Queue contents===>\n"));
this->ready_queue_.dump ();
#endif
DSRT_Dispatch_Item_var<DSRT_Scheduler_Traits> item_var;
this->ready_queue_.most_eligible (item_var);
ACE_hthread_t most_eligible_thr_handle = item_var->thread_handle ();
#ifdef KOKYU_DSRT_LOGGING
ACE_DEBUG ((LM_DEBUG,
"(%t|%T):curr scheduled thr handle = %d\n",
this->curr_scheduled_thr_handle_));
ACE_DEBUG ((LM_DEBUG,
"(%t|%T):most eligible thr handle = %d\n",
most_eligible_thr_handle));
#endif
if (this->curr_scheduled_thr_handle_ != most_eligible_thr_handle)
{
if (this->curr_scheduled_thr_handle_ != 0)
{
if (ACE_OS::thr_setprio (this->curr_scheduled_thr_handle_,
this->inactive_prio_,
this->sched_policy_) == -1)
{
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("%p\n"),
ACE_TEXT ("thr_setprio on curr_scheduled_thr_handle_ failed.")));
ACE_DEBUG ((LM_DEBUG, "thr_handle = %d, prio = %d\n",
this->curr_scheduled_thr_handle_,
this->inactive_prio_));
}
}
if (ACE_OS::thr_setprio (most_eligible_thr_handle,
this->active_prio_, this->sched_policy_) == -1)
{
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("%p\n"),
ACE_TEXT ("thr_setprio on most_eligible_thr_handle failed")));
}
this->curr_scheduled_thr_handle_ = most_eligible_thr_handle;
this->curr_scheduled_guid_ = item_var->guid ();
}
/*change all threads in blocked_prio_ to inactive_prio_*/
this->ready_queue_.change_prio(this->blocked_prio_, this->inactive_prio_,this->sched_policy_);
}
#ifdef KOKYU_DSRT_LOGGING
ACE_DEBUG ((LM_DEBUG, "(%t): sched thread exiting\n"));
#endif
return 0;
}
template <class DSRT_Scheduler_Traits>
int DSRT_Direct_Dispatcher_Impl<DSRT_Scheduler_Traits>::
schedule_i (Guid_t id, const DSRT_QoSDescriptor& qos)
{
ACE_GUARD_RETURN (ACE_SYNCH_RECURSIVE_MUTEX, guard, this->synch_lock_, -1);
#ifdef KOKYU_DSRT_LOGGING
ACE_DEBUG ((LM_DEBUG,
"(%t|%T):schedule_i enter\n"));
#endif
DSRT_Dispatch_Item<DSRT_Scheduler_Traits>* item;
ACE_hthread_t thr_handle;
ACE_Thread::self (thr_handle);
ACE_NEW_RETURN (item,
DSRT_Dispatch_Item<DSRT_Scheduler_Traits> (id, qos),
-1);
item->thread_handle (thr_handle);
if (this->ready_queue_.insert (item) == -1)
return -1;
#ifdef KOKYU_DSRT_LOGGING
ACE_DEBUG ((LM_DEBUG,
"(%t|%T):schedule_i after ready_q.insert\n"));
#endif
if (ACE_OS::thr_setprio (thr_handle,
this->blocked_prio_,
this->sched_policy_) == -1)
{
ACE_ERROR_RETURN ((LM_ERROR,
ACE_TEXT ("%p\n"),
ACE_TEXT ("thr_setprio failed")), -1);
}
#ifdef KOKYU_DSRT_LOGGING
ACE_DEBUG ((LM_DEBUG,
"(%t|%T):schedule_i after thr_setprio\n"));
#endif
//ready_queue_.dump ();
/*first release ready_queue_ lock. Otherwise if the scheduler gets the
sched_queue_modified_cond_lock first, then try to get the ready_queue_ lock
just when one thread who gets the ready_queue_ lock first, then try to get
sched_queue_modified_cond_lock. Deadlock happens.
*/
guard.release ();
//@@ Perhaps the lock could be moved further down just before
//setting the condition variable?
ACE_GUARD_RETURN (cond_lock_t,
mon, this->sched_queue_modified_cond_lock_, 0);
#ifdef KOKYU_DSRT_LOGGING
ACE_DEBUG ((LM_DEBUG,
"(%t|%T):schedule_i after acquiring cond lock\n"));
#endif
this->sched_queue_modified_ = 1;
this->sched_queue_modified_cond_.signal ();
#ifdef KOKYU_DSRT_LOGGING
ACE_DEBUG ((LM_DEBUG,
"(%t|%T):schedule_i exit\n"));
#endif
return 0;
}
template <class DSRT_Scheduler_Traits>
int DSRT_Direct_Dispatcher_Impl<DSRT_Scheduler_Traits>::
update_schedule_i (Guid_t guid, const DSRT_QoSDescriptor& qos)
{
return this->schedule (guid, qos);
}
template <class DSRT_Scheduler_Traits>
int DSRT_Direct_Dispatcher_Impl<DSRT_Scheduler_Traits>::
update_schedule_i (Guid_t guid, Block_Flag_t flag)
{
ACE_GUARD_RETURN (ACE_SYNCH_RECURSIVE_MUTEX, guard, this->synch_lock_, -1);
#ifdef KOKYU_DSRT_LOGGING
ACE_DEBUG ((LM_DEBUG, "(%t): update schedule for block entered\n"));
#endif
DSRT_Dispatch_Item_var<DSRT_Scheduler_Traits> dispatch_item;
ACE_hthread_t thr_handle;
int found = this->ready_queue_.find (guid, dispatch_item);
if (found == 0 && flag == BLOCK)
{
thr_handle = dispatch_item->thread_handle ();
if (ACE_OS::thr_setprio (thr_handle,
this->blocked_prio_,
this->sched_policy_) == -1)
{
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("%p\n"),
ACE_TEXT ("thr_setprio failed")));
}
//monitor released because cancel_schedule would acquire the
//lock. Using recursive mutex creates lock up.
//
//@@ Need to investigate this further. Also we can consider
//using the Thread-Safe interface pattern.
//mon.release ();
int rc = this->cancel_schedule (guid);
#ifdef KOKYU_DSRT_LOGGING
ACE_DEBUG ((LM_DEBUG, "(%t): update schedule for block done\n"));
#endif
return rc;
}
#ifdef KOKYU_DSRT_LOGGING
ACE_DEBUG ((LM_DEBUG, "(%t): update schedule for block done\n"));
#endif
return -1;
}
template <class DSRT_Scheduler_Traits> int
DSRT_Direct_Dispatcher_Impl<DSRT_Scheduler_Traits>::
cancel_schedule_i (Guid_t guid)
{
ACE_GUARD_RETURN (ACE_SYNCH_RECURSIVE_MUTEX, guard, this->synch_lock_, -1);
#ifdef KOKYU_DSRT_LOGGING
ACE_DEBUG ((LM_DEBUG, "(%t): about to remove guid\n"));
#endif
this->ready_queue_.remove (guid);
#ifdef KOKYU_DSRT_LOGGING
this->ready_queue_.dump ();
#endif
if (this->curr_scheduled_guid_ == guid)
{
this->curr_scheduled_guid_ = 0;
this->curr_scheduled_thr_handle_ = 0;
}
//release ready_queue_ lock first before getting another lock
guard.release ();
ACE_GUARD_RETURN (cond_lock_t,
mon, this->sched_queue_modified_cond_lock_, 0);
this->sched_queue_modified_ = 1;
this->sched_queue_modified_cond_.signal ();
return 0;
}
template <class DSRT_Scheduler_Traits> int
DSRT_Direct_Dispatcher_Impl<DSRT_Scheduler_Traits>::
shutdown_i ()
{
this->shutdown_flagged_ = 1;
ACE_GUARD_RETURN (cond_lock_t, mon, this->sched_queue_modified_cond_lock_, 0);
this->sched_queue_modified_ = 1;
this->sched_queue_modified_cond_.signal ();
// We have to wait until the scheduler executive thread shuts
// down. But we have acquired the lock and if we wait without
// releasing it, the scheduler thread will try to acquire it after
// it gets woken up by the above signal and it fails to acquire the
// lock. This will lead to a deadlock. So release the lock before we
// wait.
mon.release ();
this->wait ();
return 0;
}
}
#endif /* DSRT_DIRECT_DISPATCHER_IMPL_T_CPP */
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