edd70612e5
Manages the file descriptor owned by File by UniqueFD. Signed-off-by: Hirokazu Honda <hiroh@chromium.org> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
88 lines
1.6 KiB
C++
88 lines
1.6 KiB
C++
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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/*
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* Copyright (C) 2020, Google Inc.
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*
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* file.h - File I/O operations
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*/
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#pragma once
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#include <sys/types.h>
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#include <map>
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#include <string>
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#include <libcamera/base/private.h>
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#include <libcamera/base/class.h>
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#include <libcamera/base/flags.h>
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#include <libcamera/base/span.h>
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#include <libcamera/base/unique_fd.h>
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namespace libcamera {
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class File
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{
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public:
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enum class MapFlag {
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NoOption = 0,
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Private = (1 << 0),
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};
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using MapFlags = Flags<MapFlag>;
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enum class OpenModeFlag {
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NotOpen = 0,
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ReadOnly = (1 << 0),
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WriteOnly = (1 << 1),
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ReadWrite = ReadOnly | WriteOnly,
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};
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using OpenMode = Flags<OpenModeFlag>;
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File(const std::string &name);
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File();
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~File();
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const std::string &fileName() const { return name_; }
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void setFileName(const std::string &name);
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bool exists() const;
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bool open(OpenMode mode);
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bool isOpen() const { return fd_.isValid(); }
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OpenMode openMode() const { return mode_; }
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void close();
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int error() const { return error_; }
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ssize_t size() const;
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off_t pos() const;
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off_t seek(off_t pos);
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ssize_t read(const Span<uint8_t> &data);
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ssize_t write(const Span<const uint8_t> &data);
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Span<uint8_t> map(off_t offset = 0, ssize_t size = -1,
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MapFlags flags = MapFlag::NoOption);
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bool unmap(uint8_t *addr);
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static bool exists(const std::string &name);
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private:
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LIBCAMERA_DISABLE_COPY(File)
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void unmapAll();
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std::string name_;
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UniqueFD fd_;
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OpenMode mode_;
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int error_;
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std::map<void *, size_t> maps_;
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};
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LIBCAMERA_FLAGS_ENABLE_OPERATORS(File::MapFlag)
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LIBCAMERA_FLAGS_ENABLE_OPERATORS(File::OpenModeFlag)
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} /* namespace libcamera */
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