b90711ea53
This patch extends the previous patch's alterations around fd_map. It cleans up some of the uglier code in the process file and replaces it with a more concise C++11 version. As part of the changes, the FdMap class is pulled out of the Process class and receives its own file.
93 lines
3.2 KiB
C++
93 lines
3.2 KiB
C++
/*
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* Copyright (c) 2015 Advanced Micro Devices, Inc.
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* Copyright (c) 2001-2005 The Regents of The University of Michigan
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Nathan Binkert
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* Steve Reinhardt
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*/
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#ifndef __FD_ENTRY_HH__
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#define __FD_ENTRY_HH__
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#include <ostream>
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#include <string>
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#include "sim/emul_driver.hh"
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/**
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* FDEntry is used to manage a single file descriptor mapping and metadata
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* for processes.
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* Note that the fields are all declared publicly since system calls have a
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* habit of only needing to access a single field at a time and accessor
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* methods seem like overkill.
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*/
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class FDEntry : public Serializable
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{
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public:
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/**
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* Constructor contains default values
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* The file descriptor is free.
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*/
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FDEntry()
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: fd(-1), mode(0), flags(0), isPipe(false), readPipeSource(0),
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fileOffset(0), filename(""), driver(NULL)
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{ }
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void serialize(CheckpointOut &cp) const M5_ATTR_OVERRIDE;
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void unserialize(CheckpointIn &cp) M5_ATTR_OVERRIDE;
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/**
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* Check if the target file descriptor is in use.
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* @return value denoting if target file descriptor already used
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*/
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bool isFree();
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/**
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* Fill in members for this file descriptor entry.
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* @param sim_fd host file descriptor
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* @param name filename string
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* @param flags current flags of the file descriptor
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* @param mode current mode of the file descriptor
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* @param pipe denotes whether the file descriptor belongs to a pipe
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*/
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void set(int sim_fd, const std::string name, int flags, int mode,
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bool pipe);
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/** Reset members to their default values. */
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void reset();
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int fd;
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int mode;
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int flags;
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bool isPipe;
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int readPipeSource;
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uint64_t fileOffset;
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std::string filename;
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EmulatedDriver *driver;
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};
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#endif // __FD_ENTRY_HH__
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