| /* |
| * Copyright (C) 2013 Apple Inc. All rights reserved. |
| * Copyright (C) 2017 Sony Interactive Entertainment Inc. |
| * Copyright (C) 2017 NAVER Corp. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "CurlRequestScheduler.h" |
| |
| #if USE(CURL) |
| |
| #include "CurlRequestSchedulerClient.h" |
| |
| namespace WebCore { |
| |
| CurlRequestScheduler::CurlRequestScheduler(long maxConnects, long maxTotalConnections, long maxHostConnections) |
| : m_maxConnects(maxConnects) |
| , m_maxTotalConnections(maxTotalConnections) |
| , m_maxHostConnections(maxHostConnections) |
| { |
| } |
| |
| bool CurlRequestScheduler::add(CurlRequestSchedulerClient* client) |
| { |
| ASSERT(isMainThread()); |
| |
| if (!client) |
| return false; |
| |
| startTransfer(client); |
| startThreadIfNeeded(); |
| |
| return true; |
| } |
| |
| void CurlRequestScheduler::cancel(CurlRequestSchedulerClient* client) |
| { |
| ASSERT(isMainThread()); |
| |
| if (!client || !client->handle()) |
| return; |
| |
| cancelTransfer(client->handle()); |
| } |
| |
| void CurlRequestScheduler::callOnWorkerThread(WTF::Function<void()>&& task) |
| { |
| { |
| LockHolder locker(m_mutex); |
| m_taskQueue.append(WTFMove(task)); |
| } |
| |
| startThreadIfNeeded(); |
| } |
| |
| void CurlRequestScheduler::startThreadIfNeeded() |
| { |
| ASSERT(isMainThread()); |
| |
| LockHolder locker(m_mutex); |
| if (!m_runThread) { |
| if (m_thread) |
| m_thread->waitForCompletion(); |
| |
| m_runThread = true; |
| m_thread = Thread::create("curlThread", [this] { |
| workerThread(); |
| m_runThread = false; |
| }); |
| } |
| } |
| |
| void CurlRequestScheduler::stopThreadIfNoMoreJobRunning() |
| { |
| ASSERT(!isMainThread()); |
| |
| if (m_activeJobs.size()) |
| return; |
| |
| LockHolder locker(m_mutex); |
| if (m_taskQueue.size()) |
| return; |
| |
| m_runThread = false; |
| } |
| |
| void CurlRequestScheduler::stopThread() |
| { |
| m_runThread = false; |
| |
| if (m_thread) { |
| m_thread->waitForCompletion(); |
| m_thread = nullptr; |
| } |
| } |
| |
| void CurlRequestScheduler::executeTasks() |
| { |
| ASSERT(!isMainThread()); |
| |
| Vector<WTF::Function<void()>> taskQueue; |
| |
| { |
| LockHolder locker(m_mutex); |
| taskQueue = WTFMove(m_taskQueue); |
| } |
| |
| for (auto& task : taskQueue) |
| task(); |
| } |
| |
| void CurlRequestScheduler::workerThread() |
| { |
| ASSERT(!isMainThread()); |
| |
| m_curlMultiHandle = std::make_unique<CurlMultiHandle>(); |
| m_curlMultiHandle->setMaxConnects(m_maxConnects); |
| m_curlMultiHandle->setMaxTotalConnections(m_maxTotalConnections); |
| m_curlMultiHandle->setMaxHostConnections(m_maxHostConnections); |
| |
| while (m_runThread) { |
| executeTasks(); |
| |
| // Retry 'select' if it was interrupted by a process signal. |
| int rc = 0; |
| do { |
| fd_set fdread; |
| fd_set fdwrite; |
| fd_set fdexcep; |
| int maxfd = 0; |
| |
| const int selectTimeoutMS = 5; |
| |
| struct timeval timeout; |
| timeout.tv_sec = 0; |
| timeout.tv_usec = selectTimeoutMS * 1000; // select waits microseconds |
| |
| m_curlMultiHandle->getFdSet(fdread, fdwrite, fdexcep, maxfd); |
| |
| // When the 3 file descriptors are empty, winsock will return -1 |
| // and bail out, stopping the file download. So make sure we |
| // have valid file descriptors before calling select. |
| if (maxfd >= 0) |
| rc = ::select(maxfd + 1, &fdread, &fdwrite, &fdexcep, &timeout); |
| } while (rc == -1 && errno == EINTR); |
| |
| int activeCount = 0; |
| while (m_curlMultiHandle->perform(activeCount) == CURLM_CALL_MULTI_PERFORM) { } |
| |
| // check the curl messages indicating completed transfers |
| // and free their resources |
| while (true) { |
| int messagesInQueue = 0; |
| CURLMsg* msg = m_curlMultiHandle->readInfo(messagesInQueue); |
| if (!msg) |
| break; |
| |
| ASSERT(msg->msg == CURLMSG_DONE); |
| completeTransfer(msg->easy_handle, msg->data.result); |
| } |
| |
| stopThreadIfNoMoreJobRunning(); |
| } |
| |
| m_curlMultiHandle = nullptr; |
| } |
| |
| void CurlRequestScheduler::startTransfer(CurlRequestSchedulerClient* client) |
| { |
| client->retain(); |
| |
| auto task = [this, client]() { |
| CURL* handle = client->setupTransfer(); |
| if (!handle) |
| return; |
| |
| m_activeJobs.add(handle, client); |
| m_curlMultiHandle->addHandle(handle); |
| }; |
| |
| LockHolder locker(m_mutex); |
| m_taskQueue.append(WTFMove(task)); |
| } |
| |
| void CurlRequestScheduler::completeTransfer(CURL* handle, CURLcode result) |
| { |
| finalizeTransfer(handle, [result](CurlRequestSchedulerClient* client) { |
| client->didCompleteTransfer(result); |
| }); |
| } |
| |
| void CurlRequestScheduler::cancelTransfer(CURL* handle) |
| { |
| finalizeTransfer(handle, [](CurlRequestSchedulerClient* client) { |
| client->didCancelTransfer(); |
| }); |
| } |
| |
| void CurlRequestScheduler::finalizeTransfer(CURL* handle, Function<void(CurlRequestSchedulerClient*)> completionHandler) |
| { |
| auto task = [this, handle, completion = WTFMove(completionHandler)]() { |
| if (!m_activeJobs.contains(handle)) |
| return; |
| |
| CurlRequestSchedulerClient* client = m_activeJobs.inlineGet(handle); |
| |
| m_curlMultiHandle->removeHandle(handle); |
| m_activeJobs.remove(handle); |
| completion(client); |
| |
| callOnMainThread([client]() { |
| client->release(); |
| }); |
| }; |
| |
| LockHolder locker(m_mutex); |
| m_taskQueue.append(WTFMove(task)); |
| } |
| |
| } |
| |
| #endif |