1653 assert(prevtail->FreeNext == NULL, "cleaned up deflated?");
1654 prevtail->FreeNext = mid;
1655 }
1656 *freeTailp = mid;
1657 deflated = true;
1658 }
1659 return deflated;
1660 }
1661
1662 // Walk a given monitor list, and deflate idle monitors
1663 // The given list could be a per-thread list or a global list
1664 // Caller acquires gListLock.
1665 //
1666 // In the case of parallel processing of thread local monitor lists,
1667 // work is done by Threads::parallel_threads_do() which ensures that
1668 // each Java thread is processed by exactly one worker thread, and
1669 // thus avoid conflicts that would arise when worker threads would
1670 // process the same monitor lists concurrently.
1671 //
1672 // See also ParallelSPCleanupTask and
1673 // SafepointSynchronizer::do_cleanup_tasks() in safepoint.cpp and
1674 // Threads::parallel_java_threads_do() in thread.cpp.
1675 int ObjectSynchronizer::deflate_monitor_list(ObjectMonitor** listHeadp,
1676 ObjectMonitor** freeHeadp,
1677 ObjectMonitor** freeTailp) {
1678 ObjectMonitor* mid;
1679 ObjectMonitor* next;
1680 ObjectMonitor* cur_mid_in_use = NULL;
1681 int deflated_count = 0;
1682
1683 for (mid = *listHeadp; mid != NULL;) {
1684 oop obj = (oop) mid->object();
1685 if (obj != NULL && deflate_monitor(mid, obj, freeHeadp, freeTailp)) {
1686 // if deflate_monitor succeeded,
1687 // extract from per-thread in-use list
1688 if (mid == *listHeadp) {
1689 *listHeadp = mid->FreeNext;
1690 } else if (cur_mid_in_use != NULL) {
1691 cur_mid_in_use->FreeNext = mid->FreeNext; // maintain the current thread in-use list
1692 }
1693 next = mid->FreeNext;
|
1653 assert(prevtail->FreeNext == NULL, "cleaned up deflated?");
1654 prevtail->FreeNext = mid;
1655 }
1656 *freeTailp = mid;
1657 deflated = true;
1658 }
1659 return deflated;
1660 }
1661
1662 // Walk a given monitor list, and deflate idle monitors
1663 // The given list could be a per-thread list or a global list
1664 // Caller acquires gListLock.
1665 //
1666 // In the case of parallel processing of thread local monitor lists,
1667 // work is done by Threads::parallel_threads_do() which ensures that
1668 // each Java thread is processed by exactly one worker thread, and
1669 // thus avoid conflicts that would arise when worker threads would
1670 // process the same monitor lists concurrently.
1671 //
1672 // See also ParallelSPCleanupTask and
1673 // SafepointSynchronize::do_cleanup_tasks() in safepoint.cpp and
1674 // Threads::parallel_java_threads_do() in thread.cpp.
1675 int ObjectSynchronizer::deflate_monitor_list(ObjectMonitor** listHeadp,
1676 ObjectMonitor** freeHeadp,
1677 ObjectMonitor** freeTailp) {
1678 ObjectMonitor* mid;
1679 ObjectMonitor* next;
1680 ObjectMonitor* cur_mid_in_use = NULL;
1681 int deflated_count = 0;
1682
1683 for (mid = *listHeadp; mid != NULL;) {
1684 oop obj = (oop) mid->object();
1685 if (obj != NULL && deflate_monitor(mid, obj, freeHeadp, freeTailp)) {
1686 // if deflate_monitor succeeded,
1687 // extract from per-thread in-use list
1688 if (mid == *listHeadp) {
1689 *listHeadp = mid->FreeNext;
1690 } else if (cur_mid_in_use != NULL) {
1691 cur_mid_in_use->FreeNext = mid->FreeNext; // maintain the current thread in-use list
1692 }
1693 next = mid->FreeNext;
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