summaryrefslogtreecommitdiffstats
path: root/cppu/source/threadpool/jobqueue.cxx
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--cppu/source/threadpool/jobqueue.cxx191
1 files changed, 191 insertions, 0 deletions
diff --git a/cppu/source/threadpool/jobqueue.cxx b/cppu/source/threadpool/jobqueue.cxx
new file mode 100644
index 000000000..b4974fdc1
--- /dev/null
+++ b/cppu/source/threadpool/jobqueue.cxx
@@ -0,0 +1,191 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you 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 .
+ */
+
+#include "jobqueue.hxx"
+#include "threadpool.hxx"
+
+#include <osl/diagnose.h>
+
+using namespace ::osl;
+
+namespace cppu_threadpool {
+
+ JobQueue::JobQueue() :
+ m_nToDo( 0 ),
+ m_bSuspended( false ),
+ m_DisposedCallerAdmin( DisposedCallerAdmin::getInstance() )
+ {
+ }
+
+ void JobQueue::add( void *pThreadSpecificData, RequestFun * doRequest )
+ {
+ MutexGuard guard( m_mutex );
+ Job job = { pThreadSpecificData , doRequest };
+ m_lstJob.push_back( job );
+ if( ! m_bSuspended )
+ {
+ m_cndWait.set();
+ }
+ m_nToDo ++;
+ }
+
+ void *JobQueue::enter( sal_Int64 nDisposeId , bool bReturnWhenNoJob )
+ {
+ void *pReturn = nullptr;
+ {
+ // synchronize with the dispose calls
+ MutexGuard guard( m_mutex );
+ if( m_DisposedCallerAdmin->isDisposed( nDisposeId ) )
+ {
+ return nullptr;
+ }
+ m_lstCallstack.push_front( nDisposeId );
+ }
+
+
+ while( true )
+ {
+ if( bReturnWhenNoJob )
+ {
+ MutexGuard guard( m_mutex );
+ if( m_lstJob.empty() )
+ {
+ break;
+ }
+ }
+
+ m_cndWait.wait();
+
+ struct Job job={nullptr,nullptr};
+ {
+ // synchronize with add and dispose calls
+ MutexGuard guard( m_mutex );
+
+ if( 0 == m_lstCallstack.front() )
+ {
+ // disposed !
+ if (!m_lstJob.empty() && m_lstJob.front().doRequest == nullptr) {
+ // If this thread was waiting for a remote response, that response may or
+ // may not have been enqueued; if it has not been enqueued, there cannot be
+ // another enqueued response, so it is always correct to remove any enqueued
+ // response here:
+ m_lstJob.pop_front();
+ }
+ if( m_lstJob.empty()
+ && (m_lstCallstack.empty()
+ || m_lstCallstack.front() != 0) )
+ {
+ m_cndWait.reset();
+ }
+ break;
+ }
+
+ OSL_ASSERT( ! m_lstJob.empty() );
+ if( ! m_lstJob.empty() )
+ {
+ job = m_lstJob.front();
+ m_lstJob.pop_front();
+ }
+ if( m_lstJob.empty()
+ && (m_lstCallstack.empty() || m_lstCallstack.front() != 0) )
+ {
+ m_cndWait.reset();
+ }
+ }
+
+ if( job.doRequest )
+ {
+ job.doRequest( job.pThreadSpecificData );
+ MutexGuard guard( m_mutex );
+ m_nToDo --;
+ }
+ else
+ {
+ pReturn = job.pThreadSpecificData;
+ MutexGuard guard( m_mutex );
+ m_nToDo --;
+ break;
+ }
+ }
+
+ {
+ // synchronize with the dispose calls
+ MutexGuard guard( m_mutex );
+ m_lstCallstack.pop_front();
+ }
+
+ return pReturn;
+ }
+
+ void JobQueue::dispose( sal_Int64 nDisposeId )
+ {
+ MutexGuard guard( m_mutex );
+ for( auto& rId : m_lstCallstack )
+ {
+ if( rId == nDisposeId )
+ {
+ rId = 0;
+ }
+ }
+
+ if( !m_lstCallstack.empty() && ! m_lstCallstack.front() )
+ {
+ // The thread is waiting for a disposed pCallerId, let it go
+ m_cndWait.set();
+ }
+ }
+
+ void JobQueue::suspend()
+ {
+ MutexGuard guard( m_mutex );
+ m_bSuspended = true;
+ }
+
+ void JobQueue::resume()
+ {
+ MutexGuard guard( m_mutex );
+ m_bSuspended = false;
+ if( ! m_lstJob.empty() )
+ {
+ m_cndWait.set();
+ }
+ }
+
+ bool JobQueue::isEmpty() const
+ {
+ MutexGuard guard( m_mutex );
+ return m_lstJob.empty();
+ }
+
+ bool JobQueue::isCallstackEmpty() const
+ {
+ MutexGuard guard( m_mutex );
+ return m_lstCallstack.empty();
+ }
+
+ bool JobQueue::isBusy() const
+ {
+ MutexGuard guard( m_mutex );
+ return m_nToDo > 0;
+ }
+
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */