| 274 | } |
| 275 | |
| 276 | StableAttachmentPart* WorkerAttachment::getAttachment(FbStatusVector* status, Database* dbb) |
| 277 | { |
| 278 | // There should be no locked attachment. |
| 279 | #ifdef _DEBUG |
| 280 | thread_db* tdbb = JRD_get_thread_data(); |
| 281 | if (tdbb) |
| 282 | { |
| 283 | Attachment* att = tdbb->getAttachment(); |
| 284 | if (att) |
| 285 | { |
| 286 | const StableAttachmentPart::Sync* sync = att->getStable()->getSync(); |
| 287 | fb_assert(!sync || !sync->locked()); |
| 288 | } |
| 289 | } |
| 290 | #endif |
| 291 | |
| 292 | Arg::Gds(isc_shutdown).copyTo(status); |
| 293 | |
| 294 | WorkerAttachment* item = getByName(dbb->dbb_filename); |
| 295 | if (!item) |
| 296 | return NULL; |
| 297 | |
| 298 | MutexLockGuard guard(item->m_mutex, FB_FUNCTION); |
| 299 | |
| 300 | if (m_shutdown) |
| 301 | return NULL; |
| 302 | |
| 303 | FB_SIZE_T maxWorkers = Config::getMaxParallelWorkers(); |
| 304 | if (maxWorkers <= 0) |
| 305 | maxWorkers = MAX_ULONG; |
| 306 | |
| 307 | StableAttachmentPart* sAtt = NULL; |
| 308 | while (!item->m_idleAtts.isEmpty()) |
| 309 | { |
| 310 | if (m_shutdown) |
| 311 | return NULL; |
| 312 | |
| 313 | sAtt = item->m_idleAtts.pop(); |
| 314 | if (sAtt->getHandle()) |
| 315 | { |
| 316 | status->init(); |
| 317 | break; |
| 318 | } |
| 319 | |
| 320 | // idle worker attachment was unexpectedly deleted, clean up and try next one |
| 321 | MutexUnlockGuard unlock(item->m_mutex, FB_FUNCTION); |
| 322 | |
| 323 | FbLocalStatus local; |
| 324 | doDetach(&local, sAtt); |
| 325 | sAtt = NULL; |
| 326 | } |
| 327 | |
| 328 | if (!sAtt) |
| 329 | { |
| 330 | if (item->m_activeAtts.getCount() >= maxWorkers) |
| 331 | { |
| 332 | (Arg::Gds(isc_random) << Arg::Str("No enough free worker attachments")).copyTo(status); |
| 333 | return NULL; |
nothing calls this directly
no test coverage detected