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/**
* @copyright
* ====================================================================
* 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
*
* 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.
* ====================================================================
* @endcopyright
*
* @file JNIThreadData.cpp
* @brief Implementation of the class JNIThreadData
*/
#include "JNIThreadData.h"
#include <apr_strings.h>
#include <apr_tables.h>
#include <apr_general.h>
#include <apr_lib.h>
#include <apr_thread_proc.h>
#include "JNIUtil.h"
apr_threadkey_t *JNIThreadData::g_key;
/**
* Create and initialize a new object.
*/
JNIThreadData::JNIThreadData()
{
m_env = NULL;
m_exceptionThrown = false;
m_previous = NULL;
}
JNIThreadData::~JNIThreadData()
{
}
/**
* Initialize the thread local storage.
* @return success or failure
*/
bool JNIThreadData::initThreadData()
{
// If already initialized -> nothing to do.
if (g_key != NULL)
return false;
// Request a key for the thread local storage from the global pool
// and register a callback function called when the thread is
// deleted.
apr_status_t apr_err = apr_threadkey_private_create(&g_key,
del,
JNIUtil::getPool());
if (apr_err)
{
JNIUtil::handleAPRError(apr_err, "apr_threadkey_private_create");
return false;
}
return true;
}
/**
* Get the thread local storage for this thread.
* @return thread local storage
*/
JNIThreadData *JNIThreadData::getThreadData()
{
// We should never be called before initThreadData
if (g_key == NULL)
return NULL;
// Retrieve the thread local storage from APR.
JNIThreadData *data = NULL;
apr_status_t apr_err = apr_threadkey_private_get
(reinterpret_cast<void**>(&data), g_key);
if (apr_err)
{
JNIUtil::handleAPRError(apr_err, "apr_threadkey_private_get");
return NULL;
}
// Not already allocated.
if (data == NULL)
{
// Allocate and store to APR.
data = new JNIThreadData;
apr_err = apr_threadkey_private_set (data, g_key);
if (apr_err)
{
JNIUtil::handleAPRError(apr_err, "apr_threadkey_private_set");
return NULL;
}
}
return data;
}
/**
* Allocate a new ThreadData for the current call from Java and push
* it on the stack
*/
void JNIThreadData::pushNewThreadData()
{
JNIThreadData *data = NULL;
apr_status_t apr_err = apr_threadkey_private_get
(reinterpret_cast<void**>(&data), g_key);
if (apr_err)
{
JNIUtil::handleAPRError(apr_err, "apr_threadkey_private_get");
return;
}
JNIThreadData *newData = new JNIThreadData();
newData->m_previous =data;
apr_err = apr_threadkey_private_set(newData, g_key);
if (apr_err)
{
JNIUtil::handleAPRError(apr_err, "apr_threadkey_private_set");
return;
}
}
/**
* Pop the current ThreadData from the stack, because the call
* completed.
*/
void JNIThreadData::popThreadData()
{
JNIThreadData *data = NULL;
apr_status_t apr_err = apr_threadkey_private_get
(reinterpret_cast<void**>(&data), g_key);
if (apr_err)
{
JNIUtil::handleAPRError(apr_err, "apr_threadkey_private_get");
return;
}
if (data == NULL)
return;
JNIThreadData *oldData = data->m_previous;
delete data;
apr_err = apr_threadkey_private_set(oldData, g_key);
if (apr_err)
{
JNIUtil::handleAPRError(apr_err, "apr_threadkey_private_set");
return;
}
}
/**
* Callback called by APR when the thread dies. Deletes the thread
* local storage.
*/
void JNIThreadData::del(void *p)
{
delete reinterpret_cast<JNIThreadData*>(p);
}
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