| 1 | /* -*- C++ -*- |
|---|---|
| 2 | This file is part of ThreadWeaver. |
| 3 | |
| 4 | SPDX-FileCopyrightText: 2004-2013 Mirko Boehm <mirko@kde.org> |
| 5 | |
| 6 | SPDX-License-Identifier: LGPL-2.0-or-later |
| 7 | */ |
| 8 | |
| 9 | #include "sequence_p.h" |
| 10 | #include "debuggingaids.h" |
| 11 | |
| 12 | namespace ThreadWeaver |
| 13 | { |
| 14 | namespace Private |
| 15 | { |
| 16 | Sequence_Private::Sequence_Private() |
| 17 | { |
| 18 | } |
| 19 | |
| 20 | BlockerPolicy *Sequence_Private::blocker() |
| 21 | { |
| 22 | return &blocker_; |
| 23 | } |
| 24 | |
| 25 | void Sequence_Private::prepareToEnqueueElements() |
| 26 | { |
| 27 | Q_ASSERT(!mutex.tryLock()); |
| 28 | const int jobs = elements.count(); |
| 29 | // probably incorrect: |
| 30 | completed_.storeRelease(newValue: 0); |
| 31 | // block the execution of the later jobs: |
| 32 | for (int i = 0; i < jobs; ++i) { |
| 33 | TWDEBUG(4, "Sequence_Private::prepareToEnqueueElements: blocking %p\n", elements.at(i).data()); |
| 34 | JobPointer nextJob = elements.at(i); |
| 35 | QMutexLocker l(nextJob->mutex()); |
| 36 | nextJob->assignQueuePolicy(blocker()); |
| 37 | } |
| 38 | } |
| 39 | |
| 40 | void Sequence_Private::processCompletedElement(Collection *collection, JobPointer job, Thread *) |
| 41 | { |
| 42 | Q_ASSERT(!mutex.tryLock()); |
| 43 | Q_ASSERT(job != nullptr); |
| 44 | Q_ASSERT(!self.isNull()); |
| 45 | |
| 46 | auto updatedStatus = updateStatus(collection, job); |
| 47 | if (updatedStatus != JobInterface::Status_Running) { |
| 48 | // We need to unlock mutex so that `stop` can |
| 49 | // properly stop us |
| 50 | mutex.unlock(); |
| 51 | stop(collection); |
| 52 | mutex.lock(); |
| 53 | // stop might have changed our status |
| 54 | // so lets restore back to original |
| 55 | collection->setStatus(updatedStatus); |
| 56 | } |
| 57 | const int next = completed_.fetchAndAddAcquire(valueToAdd: 1); |
| 58 | const int count = elements.count(); |
| 59 | if (count > 0) { |
| 60 | if (next < count) { |
| 61 | TWDEBUG(4, "Sequence_Private::processCompletedElement: unblocking %p\n", elements.at(next).data()); |
| 62 | JobPointer nextJob = elements.at(i: next); |
| 63 | QMutexLocker l(nextJob->mutex()); |
| 64 | nextJob->removeQueuePolicy(blocker()); |
| 65 | } |
| 66 | } |
| 67 | } |
| 68 | |
| 69 | void Sequence_Private::elementDequeued(const JobPointer &job) |
| 70 | { |
| 71 | Q_ASSERT(!mutex.tryLock()); |
| 72 | QMutexLocker l(job->mutex()); |
| 73 | job->removeQueuePolicy(blocker()); |
| 74 | } |
| 75 | |
| 76 | void BlockerPolicy::destructed(JobInterface *) |
| 77 | { |
| 78 | } |
| 79 | |
| 80 | bool BlockerPolicy::canRun(JobPointer) |
| 81 | { |
| 82 | return false; |
| 83 | } |
| 84 | |
| 85 | void BlockerPolicy::free(JobPointer) |
| 86 | { |
| 87 | } |
| 88 | |
| 89 | void BlockerPolicy::release(JobPointer) |
| 90 | { |
| 91 | } |
| 92 | |
| 93 | } |
| 94 | |
| 95 | } |
| 96 |