| /* |
| * Copyright (c) 2016, 2020, 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 |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef SHARE_VM_JFR_WRITERS_JFRSTREAMWRITERHOST_INLINE_HPP |
| #define SHARE_VM_JFR_WRITERS_JFRSTREAMWRITERHOST_INLINE_HPP |
| |
| #include "jfr/writers/jfrStreamWriterHost.hpp" |
| #include "runtime/os.hpp" |
| |
| template <typename Adapter, typename AP> |
| StreamWriterHost<Adapter, AP>::StreamWriterHost(typename Adapter::StorageType* storage, Thread* thread) : |
| MemoryWriterHost<Adapter, AP>(storage, thread), _stream_pos(0), _fd(invalid_fd) { |
| } |
| |
| template <typename Adapter, typename AP> |
| StreamWriterHost<Adapter, AP>::StreamWriterHost(typename Adapter::StorageType* storage, size_t size) : |
| MemoryWriterHost<Adapter, AP>(storage, size), _stream_pos(0), _fd(invalid_fd) { |
| } |
| |
| template <typename Adapter, typename AP> |
| StreamWriterHost<Adapter, AP>::StreamWriterHost(Thread* thread) : |
| MemoryWriterHost<Adapter, AP>(thread), _stream_pos(0), _fd(invalid_fd) { |
| } |
| |
| template <typename Adapter, typename AP> |
| inline int64_t StreamWriterHost<Adapter, AP>::current_stream_position() const { |
| return this->used_offset() + _stream_pos; |
| } |
| |
| template <typename Adapter, typename AP> |
| inline bool StreamWriterHost<Adapter, AP>::accommodate(size_t used, size_t requested) { |
| if (used > 0) { |
| this->flush(used); |
| } |
| assert(this->used_size() == 0, "invariant"); |
| if (this->available_size() >= requested) { |
| return true; |
| } |
| return StorageHost<Adapter, AP>::accommodate(0, requested); |
| } |
| |
| template <typename Adapter, typename AP> |
| inline void StreamWriterHost<Adapter, AP>::write_bytes(void* dest, const void* buf, intptr_t len) { |
| assert(len >= 0, "invariant"); |
| if (len > (intptr_t)this->available_size()) { |
| this->write_unbuffered(buf, len); |
| return; |
| } |
| MemoryWriterHost<Adapter, AP>::write_bytes(dest, buf, len); |
| } |
| |
| template <typename Adapter, typename AP> |
| inline void StreamWriterHost<Adapter, AP>::write_bytes(const u1* buf, intptr_t len) { |
| assert(len >= 0, "invariant"); |
| while (len > 0) { |
| const unsigned int nBytes = len > INT_MAX ? INT_MAX : (unsigned int)len; |
| const ssize_t num_written = (ssize_t)os::write(_fd, buf, nBytes); |
| guarantee(num_written > 0, "Nothing got written, or os::write() failed"); |
| _stream_pos += num_written; |
| len -= num_written; |
| buf += num_written; |
| } |
| } |
| |
| template <typename Adapter, typename AP> |
| inline void StreamWriterHost<Adapter, AP>::flush(size_t size) { |
| assert(size > 0, "invariant"); |
| assert(this->is_valid(), "invariant"); |
| this->write_bytes(this->start_pos(), (intptr_t)size); |
| StorageHost<Adapter, AP>::reset(); |
| assert(0 == this->used_offset(), "invariant"); |
| } |
| |
| template <typename Adapter, typename AP> |
| inline bool StreamWriterHost<Adapter, AP>::has_valid_fd() const { |
| return invalid_fd != _fd; |
| } |
| |
| template <typename Adapter, typename AP> |
| inline int64_t StreamWriterHost<Adapter, AP>::current_offset() const { |
| return current_stream_position(); |
| } |
| |
| template <typename Adapter, typename AP> |
| void StreamWriterHost<Adapter, AP>::seek(int64_t offset) { |
| this->flush(); |
| assert(0 == this->used_offset(), "can only seek from beginning"); |
| _stream_pos = os::seek_to_file_offset(_fd, offset); |
| } |
| |
| template <typename Adapter, typename AP> |
| void StreamWriterHost<Adapter, AP>::flush() { |
| if (this->is_valid()) { |
| const size_t used = this->used_size(); |
| if (used > 0) { |
| this->flush(used); |
| } |
| } |
| } |
| |
| template <typename Adapter, typename AP> |
| void StreamWriterHost<Adapter, AP>::write_unbuffered(const void* buf, intptr_t len) { |
| this->flush(); |
| assert(0 == this->used_offset(), "can only seek from beginning"); |
| this->write_bytes((const u1*)buf, len); |
| } |
| |
| template <typename Adapter, typename AP> |
| inline bool StreamWriterHost<Adapter, AP>::is_valid() const { |
| return has_valid_fd(); |
| } |
| |
| template <typename Adapter, typename AP> |
| inline void StreamWriterHost<Adapter, AP>::close_fd() { |
| assert(this->has_valid_fd(), "closing invalid fd!"); |
| os::close(_fd); |
| _fd = invalid_fd; |
| } |
| |
| template <typename Adapter, typename AP> |
| inline void StreamWriterHost<Adapter, AP>::reset(fio_fd fd) { |
| assert(!this->has_valid_fd(), "invariant"); |
| _fd = fd; |
| _stream_pos = 0; |
| this->hard_reset(); |
| } |
| |
| #endif // SHARE_VM_JFR_WRITERS_JFRSTREAMWRITERHOST_INLINE_HPP |