Mercurial > hg > truffle
view agent/src/os/win32/Buffer.hpp @ 1666:5cbac8938c4c
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
Summary: During concurrent refinment, filter cards in young regions after it has been determined that the region has been allocated from and the young type of the region has been set.
Reviewed-by: iveresov, tonyp, jcoomes
author | johnc |
---|---|
date | Mon, 19 Jul 2010 11:06:34 -0700 |
parents | c18cbe5936b8 |
children |
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/* * Copyright (c) 2001, 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 _BUFFER_ #define _BUFFER_ // A Buffer is the backing store for the IOBuf abstraction and // supports producer-consumer filling and draining. class Buffer { public: Buffer(int bufSize); ~Buffer(); char* fillPos(); // Position of the place where buffer should be filled int remaining(); // Number of bytes that can be placed starting at fillPos int size(); // Size of the buffer // Move up fill position by amount (decreases remaining()); returns // false if not enough space bool incrFillPos(int amt); // Read single byte (0..255); returns -1 if no data available. int readByte(); // Read multiple bytes, non-blocking (this buffer does not define a // fill mechanism), into provided buffer. Returns number of bytes read. int readBytes(char* buf, int len); // Access to drain position. Be very careful using this. char* drainPos(); int drainRemaining(); bool incrDrainPos(int amt); // Compact buffer, removing already-consumed input. This must be // called periodically to yield the illusion of an infinite buffer. void compact(); private: Buffer(const Buffer&); Buffer& operator=(const Buffer&); char* buf; int sz; int fill; int drain; }; #endif // #defined _BUFFER_