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modronapicore.cpp
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modronapicore.cpp
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/*******************************************************************************
* Copyright (c) 1991, 2019 IBM Corp. and others
*
* This program and the accompanying materials are made available under
* the terms of the Eclipse Public License 2.0 which accompanies this
* distribution and is available at https://www.eclipse.org/legal/epl-2.0/
* or the Apache License, Version 2.0 which accompanies this distribution and
* is available at https://www.apache.org/licenses/LICENSE-2.0.
*
* This Source Code may also be made available under the following
* Secondary Licenses when the conditions for such availability set
* forth in the Eclipse Public License, v. 2.0 are satisfied: GNU
* General Public License, version 2 with the GNU Classpath
* Exception [1] and GNU General Public License, version 2 with the
* OpenJDK Assembly Exception [2].
*
* [1] https://www.gnu.org/software/classpath/license.html
* [2] http://openjdk.java.net/legal/assembly-exception.html
*
* SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 OR LicenseRef-GPL-2.0 WITH Assembly-exception
*******************************************************************************/
#include "modronapicore.hpp"
#include "Dispatcher.hpp"
#include "EnvironmentBase.hpp"
#include "GCExtensionsBase.hpp"
#include "pool_api.h"
#include "omrversionstrings.h"
extern "C" {
/**
* Return the version string for the GC.
* This string is immutable and is valid for the lifetime of the garbage collector module.
*
* @parm[in] the javaVM
* @return a GC version string (e.g. "20080103_AB")
*/
const char*
omrgc_get_version(OMR_VM *omrVM)
{
return OMRVM_COMPRESS_OBJECT_REFERENCES(omvVM) ? OMR_VERSION_STRING "_CMPRSS" : OMR_VERSION_STRING;
}
uintptr_t
omrgc_condYieldFromGC(OMR_VMThread *omrVMThread, uintptr_t componentType)
{
MM_EnvironmentBase *env = MM_EnvironmentBase::getEnvironment(omrVMThread);
return ((MM_GCExtensionsBase::getExtensions(env->getOmrVM())->dispatcher->condYieldFromGCWrapper(env, 0)) ? 1 : 0);
}
/**
* Walk all J9ThreadMonitorTracing that are associated with each LightweightNonReentrantLock.
* @param[in] vm, OMR_VM used to get gc extensions.
* @param[in, out] state. If state->thePool is NULL, the first trace is returned
* If non-NULL, the next trace is returned.
* @return a pointer to a trace, or NULL if all traces walked
*
* @note Lock is obtain in the beginning of the walk and released at the end. Caller is expected to walk all traces.
*
*/
void *
omrgc_walkLWNRLockTracePool(void *omrVM, pool_state *state)
{
MM_GCExtensionsBase* gcExtensions = MM_GCExtensionsBase::getExtensions((OMR_VM *)omrVM);
J9Pool* tracingPool = gcExtensions->_lightweightNonReentrantLockPool;
J9ThreadMonitorTracing *lnrl_lock = NULL;
if (NULL != tracingPool) {
if (NULL == state->thePool) {
omrthread_monitor_enter(gcExtensions->_lightweightNonReentrantLockPoolMutex);
lnrl_lock = (J9ThreadMonitorTracing *) pool_startDo(tracingPool, state);
} else {
lnrl_lock = (J9ThreadMonitorTracing *) pool_nextDo(state);
}
if (NULL == lnrl_lock) {
omrthread_monitor_exit(gcExtensions->_lightweightNonReentrantLockPoolMutex);
}
}
return lnrl_lock;
}
} /* extern "C" */