361 // Set the number of tasks to be claimed to t. As above,
362 // should be called before the tasks start but it is safe
363 // to call this once a task is running provided all threads
364 // agree on the number of tasks.
365 void set_n_tasks(uint t) { _n_tasks = t; }
366
367 // Returns false if the next task in the sequence is unclaimed,
368 // and ensures that it is claimed. Will set t to be the index
369 // of the claimed task in the sequence. Will return true if
370 // the task cannot be claimed and there are none left to claim.
371 bool is_task_claimed(uint& t);
372
373 // The calling thread asserts that it has attempted to claim
374 // all the tasks it possibly can in the sequence. Every thread
375 // claiming tasks must promise call this. Returns true if this
376 // is the last thread to complete so that the thread can perform
377 // cleanup if necessary.
378 bool all_tasks_completed();
379 };
380
381 // Represents a set of free small integer ids.
382 class FreeIdSet : public CHeapObj<mtGC> {
383 enum {
384 end_of_list = UINT_MAX,
385 claimed = UINT_MAX - 1
386 };
387
388 uint _size;
389 Monitor* _mon;
390
391 uint* _ids;
392 uint _hd;
393 uint _waiters;
394 uint _claimed;
395
396 public:
397 FreeIdSet(uint size, Monitor* mon);
398 ~FreeIdSet();
399
400 // Returns an unclaimed parallel id (waiting for one to be released if
401 // necessary).
402 uint claim_par_id();
403
404 void release_par_id(uint id);
405 };
406
407 #endif // SHARE_VM_GC_SHARED_WORKGROUP_HPP
|
361 // Set the number of tasks to be claimed to t. As above,
362 // should be called before the tasks start but it is safe
363 // to call this once a task is running provided all threads
364 // agree on the number of tasks.
365 void set_n_tasks(uint t) { _n_tasks = t; }
366
367 // Returns false if the next task in the sequence is unclaimed,
368 // and ensures that it is claimed. Will set t to be the index
369 // of the claimed task in the sequence. Will return true if
370 // the task cannot be claimed and there are none left to claim.
371 bool is_task_claimed(uint& t);
372
373 // The calling thread asserts that it has attempted to claim
374 // all the tasks it possibly can in the sequence. Every thread
375 // claiming tasks must promise call this. Returns true if this
376 // is the last thread to complete so that the thread can perform
377 // cleanup if necessary.
378 bool all_tasks_completed();
379 };
380
381 #endif // SHARE_VM_GC_SHARED_WORKGROUP_HPP
|