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/*
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* Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#ifndef SHARE_VM_JFR_WRITERS_JFRSTREAMWRITERHOST_INLINE_HPP
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#define SHARE_VM_JFR_WRITERS_JFRSTREAMWRITERHOST_INLINE_HPP
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#include "jfr/writers/jfrStreamWriterHost.hpp"
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#include "runtime/os.hpp"
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template <typename Adapter, typename AP>
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StreamWriterHost<Adapter, AP>::StreamWriterHost(typename Adapter::StorageType* storage, Thread* thread) :
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MemoryWriterHost<Adapter, AP>(storage, thread), _stream_pos(0), _fd(invalid_fd) {
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}
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template <typename Adapter, typename AP>
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StreamWriterHost<Adapter, AP>::StreamWriterHost(typename Adapter::StorageType* storage, size_t size) :
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MemoryWriterHost<Adapter, AP>(storage, size), _stream_pos(0), _fd(invalid_fd) {
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}
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template <typename Adapter, typename AP>
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StreamWriterHost<Adapter, AP>::StreamWriterHost(Thread* thread) :
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MemoryWriterHost<Adapter, AP>(thread), _stream_pos(0), _fd(invalid_fd) {
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}
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template <typename Adapter, typename AP>
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inline intptr_t StreamWriterHost<Adapter, AP>::current_stream_position() const {
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return this->used_offset() + _stream_pos;
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}
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template <typename Adapter, typename AP>
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inline bool StreamWriterHost<Adapter, AP>::accommodate(size_t used, size_t requested) {
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if (used > 0) {
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this->flush(used);
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}
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assert(this->used_size() == 0, "invariant");
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if (this->available_size() >= requested) {
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return true;
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}
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return StorageHost<Adapter, AP>::accommodate(0, requested);
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}
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template <typename Adapter, typename AP>
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inline void StreamWriterHost<Adapter, AP>::bytes(void* dest, const void* buf, size_t len) {
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if (len > this->available_size()) {
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this->write_unbuffered(buf, len);
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return;
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}
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MemoryWriterHost<Adapter, AP>::bytes(dest, buf, len);
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}
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template <typename Adapter, typename AP>
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inline void StreamWriterHost<Adapter, AP>::flush(size_t size) {
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assert(size > 0, "invariant");
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assert(this->is_valid(), "invariant");
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_stream_pos += os::write(_fd, this->start_pos(), (int)size);
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StorageHost<Adapter, AP>::reset();
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assert(0 == this->used_offset(), "invariant");
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}
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template <typename Adapter, typename AP>
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inline bool StreamWriterHost<Adapter, AP>::has_valid_fd() const {
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return invalid_fd != _fd;
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}
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template <typename Adapter, typename AP>
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inline intptr_t StreamWriterHost<Adapter, AP>::current_offset() const {
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return current_stream_position();
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}
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template <typename Adapter, typename AP>
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void StreamWriterHost<Adapter, AP>::seek(intptr_t offset) {
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this->flush();
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assert(0 == this->used_offset(), "can only seek from beginning");
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_stream_pos = os::seek_to_file_offset(_fd, offset);
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}
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template <typename Adapter, typename AP>
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void StreamWriterHost<Adapter, AP>::flush() {
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if (this->is_valid()) {
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const size_t used = this->used_size();
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if (used > 0) {
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this->flush(used);
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}
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}
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}
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template <typename Adapter, typename AP>
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void StreamWriterHost<Adapter, AP>::write_unbuffered(const void* buf, size_t len) {
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this->flush();
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assert(0 == this->used_offset(), "can only seek from beginning");
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while (len > 0) {
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const int n = MIN2<int>((int)len, INT_MAX);
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_stream_pos += os::write(_fd, buf, n);
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len -= n;
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}
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}
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template <typename Adapter, typename AP>
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inline bool StreamWriterHost<Adapter, AP>::is_valid() const {
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return has_valid_fd();
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}
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template <typename Adapter, typename AP>
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inline void StreamWriterHost<Adapter, AP>::close_fd() {
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assert(this->has_valid_fd(), "closing invalid fd!");
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os::close(_fd);
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_fd = invalid_fd;
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}
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template <typename Adapter, typename AP>
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inline void StreamWriterHost<Adapter, AP>::reset(fio_fd fd) {
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assert(!this->has_valid_fd(), "invariant");
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_fd = fd;
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_stream_pos = 0;
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this->hard_reset();
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}
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#endif // SHARE_VM_JFR_WRITERS_JFRSTREAMWRITERHOST_INLINE_HPP
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