/*
* Copyright ( c ) 2016 , 2019 , Oracle and / or its affiliates . All rights reserved .
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
*
* This code is free software ; you can redistribute it and / or modify it
* under the terms of the GNU General Public License version 2 only , as
* published by the Free Software Foundation .
*
* This code is distributed in the hope that it will be useful , but WITHOUT
* ANY WARRANTY ; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE . See the GNU General Public License
* version 2 for more details ( a copy is included in the LICENSE file that
* accompanied this code ) .
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work ; if not , write to the Free Software Foundation ,
* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
*
* Please contact Oracle , 500 Oracle Parkway , Redwood Shores , CA 94065 USA
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*
*/
#ifndef SHARE_JFR_UTILITIES_JFRBLOB_HPP
#define SHARE_JFR_UTILITIES_JFRBLOB_HPP
#include "jfr/utilities/jfrAllocation.hpp"
#include "jfr/utilities/jfrRefCountPointer.hpp"
class JfrBlob;
typedef RefCountPointer<JfrBlob, MultiThreadedRefCounter> JfrBlobReference;
typedef RefCountHandle<JfrBlobReference> JfrBlobHandle;
class JfrBlob : public JfrCHeapObj {
template <typename , typename >
friend class RefCountPointer;
private :
const u1* const _data;
JfrBlobHandle _next;
const size_t _size;
mutable bool _written;
JfrBlob(const u1* data, size_t size);
~JfrBlob();
public :
void set_next(const JfrBlobHandle& ref);
void reset_write_state() const ;
static JfrBlobHandle make(const u1* data, size_t size);
template <typename Writer>
void write(Writer& writer) const {
writer.write_bytes(_data, _size);
if (_next.valid()) {
_next->write(writer);
}
}
template <typename Writer>
void exclusive_write(Writer& writer) const {
if (_written) {
return ;
}
writer.write_bytes(_data, _size);
_written = true ;
if (_next.valid()) {
_next->exclusive_write(writer);
}
}
};
#endif // SHARE_JFR_UTILITIES_JFRBLOB_HPP
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