summaryrefslogtreecommitdiffstats
path: root/libs/utils/WorkQueue.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'libs/utils/WorkQueue.cpp')
-rw-r--r--libs/utils/WorkQueue.cpp171
1 files changed, 0 insertions, 171 deletions
diff --git a/libs/utils/WorkQueue.cpp b/libs/utils/WorkQueue.cpp
deleted file mode 100644
index 3bb99a1..0000000
--- a/libs/utils/WorkQueue.cpp
+++ /dev/null
@@ -1,171 +0,0 @@
-/*
- * Copyright (C) 2012 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-// #define LOG_NDEBUG 0
-#define LOG_TAG "WorkQueue"
-
-#include <utils/Log.h>
-#include <utils/WorkQueue.h>
-
-namespace android {
-
-// --- WorkQueue ---
-
-WorkQueue::WorkQueue(size_t maxThreads, bool canCallJava) :
- mMaxThreads(maxThreads), mCanCallJava(canCallJava),
- mCanceled(false), mFinished(false), mIdleThreads(0) {
-}
-
-WorkQueue::~WorkQueue() {
- if (!cancel()) {
- finish();
- }
-}
-
-status_t WorkQueue::schedule(WorkUnit* workUnit, size_t backlog) {
- AutoMutex _l(mLock);
-
- if (mFinished || mCanceled) {
- return INVALID_OPERATION;
- }
-
- if (mWorkThreads.size() < mMaxThreads
- && mIdleThreads < mWorkUnits.size() + 1) {
- sp<WorkThread> workThread = new WorkThread(this, mCanCallJava);
- status_t status = workThread->run("WorkQueue::WorkThread");
- if (status) {
- return status;
- }
- mWorkThreads.add(workThread);
- mIdleThreads += 1;
- } else if (backlog) {
- while (mWorkUnits.size() >= mMaxThreads * backlog) {
- mWorkDequeuedCondition.wait(mLock);
- if (mFinished || mCanceled) {
- return INVALID_OPERATION;
- }
- }
- }
-
- mWorkUnits.add(workUnit);
- mWorkChangedCondition.broadcast();
- return OK;
-}
-
-status_t WorkQueue::cancel() {
- AutoMutex _l(mLock);
-
- return cancelLocked();
-}
-
-status_t WorkQueue::cancelLocked() {
- if (mFinished) {
- return INVALID_OPERATION;
- }
-
- if (!mCanceled) {
- mCanceled = true;
-
- size_t count = mWorkUnits.size();
- for (size_t i = 0; i < count; i++) {
- delete mWorkUnits.itemAt(i);
- }
- mWorkUnits.clear();
- mWorkChangedCondition.broadcast();
- mWorkDequeuedCondition.broadcast();
- }
- return OK;
-}
-
-status_t WorkQueue::finish() {
- { // acquire lock
- AutoMutex _l(mLock);
-
- if (mFinished) {
- return INVALID_OPERATION;
- }
-
- mFinished = true;
- mWorkChangedCondition.broadcast();
- } // release lock
-
- // It is not possible for the list of work threads to change once the mFinished
- // flag has been set, so we can access mWorkThreads outside of the lock here.
- size_t count = mWorkThreads.size();
- for (size_t i = 0; i < count; i++) {
- mWorkThreads.itemAt(i)->join();
- }
- mWorkThreads.clear();
- return OK;
-}
-
-bool WorkQueue::threadLoop() {
- WorkUnit* workUnit;
- { // acquire lock
- AutoMutex _l(mLock);
-
- for (;;) {
- if (mCanceled) {
- return false;
- }
-
- if (!mWorkUnits.isEmpty()) {
- workUnit = mWorkUnits.itemAt(0);
- mWorkUnits.removeAt(0);
- mIdleThreads -= 1;
- mWorkDequeuedCondition.broadcast();
- break;
- }
-
- if (mFinished) {
- return false;
- }
-
- mWorkChangedCondition.wait(mLock);
- }
- } // release lock
-
- bool shouldContinue = workUnit->run();
- delete workUnit;
-
- { // acquire lock
- AutoMutex _l(mLock);
-
- mIdleThreads += 1;
-
- if (!shouldContinue) {
- cancelLocked();
- return false;
- }
- } // release lock
-
- return true;
-}
-
-// --- WorkQueue::WorkThread ---
-
-WorkQueue::WorkThread::WorkThread(WorkQueue* workQueue, bool canCallJava) :
- Thread(canCallJava), mWorkQueue(workQueue) {
-}
-
-WorkQueue::WorkThread::~WorkThread() {
-}
-
-bool WorkQueue::WorkThread::threadLoop() {
- return mWorkQueue->threadLoop();
-}
-
-}; // namespace android