hotspot/src/share/vm/logging/logFileStreamOutput.cpp
author mlarsson
Mon, 09 May 2016 15:46:12 +0200
changeset 38263 a7488329ad27
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child 42067 34b99c8faa51
permissions -rw-r--r--
8145934: Make ttyLocker equivalent for Unified Logging framework Reviewed-by: rprotacio, stuefe, jrose
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/*
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 * Copyright (c) 2015, 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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#include "precompiled.hpp"
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#include "logging/logDecorators.hpp"
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#include "logging/logDecorations.hpp"
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#include "logging/logFileStreamOutput.hpp"
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#include "logging/logMessageBuffer.hpp"
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#include "memory/allocation.inline.hpp"
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LogStdoutOutput LogStdoutOutput::_instance;
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LogStderrOutput LogStderrOutput::_instance;
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int LogFileStreamOutput::write_decorations(const LogDecorations& decorations) {
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  int total_written = 0;
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  for (uint i = 0; i < LogDecorators::Count; i++) {
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    LogDecorators::Decorator decorator = static_cast<LogDecorators::Decorator>(i);
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    if (!_decorators.is_decorator(decorator)) {
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      continue;
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    }
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    int written = jio_fprintf(_stream, "[%-*s]",
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                              _decorator_padding[decorator],
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                              decorations.decoration(decorator));
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    if (written <= 0) {
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      return -1;
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    } else if (static_cast<size_t>(written - 2) > _decorator_padding[decorator]) {
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      _decorator_padding[decorator] = written - 2;
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    }
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    total_written += written;
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  }
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  return total_written;
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}
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int LogFileStreamOutput::write(const LogDecorations& decorations, const char* msg) {
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  const bool use_decorations = !_decorators.is_empty();
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  int written = 0;
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  os::flockfile(_stream);
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  if (use_decorations) {
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    written += write_decorations(decorations);
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    written += jio_fprintf(_stream, " ");
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  }
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  written += jio_fprintf(_stream, "%s\n", msg);
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  fflush(_stream);
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  os::funlockfile(_stream);
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  return written;
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}
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int LogFileStreamOutput::write(LogMessageBuffer::Iterator msg_iterator) {
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  const bool use_decorations = !_decorators.is_empty();
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  int written = 0;
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  os::flockfile(_stream);
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  for (; !msg_iterator.is_at_end(); msg_iterator++) {
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    if (use_decorations) {
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      written += write_decorations(msg_iterator.decorations());
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      written += jio_fprintf(_stream, " ");
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    }
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    written += jio_fprintf(_stream, "%s\n", msg_iterator.message());
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  }
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  fflush(_stream);
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  os::funlockfile(_stream);
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  return written;
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}