joedb::Memory_File Class Reference

#include <joedb/journal/Memory_File.h>

Inheritance diagram for joedb::Memory_File:

Collaboration diagram for joedb::Memory_File:

Public Member Functions
	Memory_File (Open_Mode mode=Open_Mode::create_new)
void	resize (size_t size)
std::string &	get_data ()
const std::string &	get_data () const
std::string	move_data () const
int64_t	get_size () const override
	Get the size of the file, or -1 if it is unknown.
size_t	pread (char *buffer, size_t size, int64_t offset) const override
	Read a range of bytes.
void	pwrite (const char *buffer, size_t size, int64_t offset) override
	Write a range of bytes. Extend file size if necessary.
Public Member Functions inherited from joedb::Abstract_File
	Abstract_File (Open_Mode mode)
bool	is_shared () const noexcept
bool	is_readonly () const noexcept
Open_Mode	get_mode () const noexcept
virtual void	sync ()
	Write data durably (including file-size change)
virtual void	datasync ()
	Write data durably (no file-size change)
virtual void	shared_lock (int64_t start, int64_t size)
	Lock a range of bytes for reading (prevents writes, not reads)
virtual void	exclusive_lock (int64_t start, int64_t size)
	Lock a range of bytes for writing (prevents both writes and reads)
virtual void	unlock (int64_t start, int64_t size) noexcept
	Remove a lock. The range should match the range of a corresponding lock.
void	exclusive_lock_tail ()
void	unlock_tail () noexcept
bool	tail_is_locked () const noexcept
void	shared_lock_head ()
void	exclusive_lock_head ()
void	unlock_head () noexcept
std::string	read_blob (Blob blob) const
virtual void	copy_to (Abstract_File &destination, int64_t start, int64_t size) const
virtual bool	equal_to (const Abstract_File &destination, int64_t from, int64_t until) const
void	copy_to (Abstract_File &destination) const
virtual	~Abstract_File ()=default

Protected Attributes
std::string	data

Additional Inherited Members
Static Public Member Functions inherited from joedb::Abstract_File
static void	reading_past_end_of_file ()
Protected Member Functions inherited from joedb::Abstract_File
void	make_readonly ()
void	make_writable ()
Static Protected Attributes inherited from joedb::Abstract_File
static constexpr int64_t	last_position = (1ULL << 63) - 1

Detailed Description

Definition at line 11 of file Memory_File.h.

Constructor & Destructor Documentation

Memory_File()

joedb::Memory_File::Memory_File ( Open_Mode  mode = Open_Mode::create_new )

inline

Definition at line 17 of file Memory_File.h.

Member Function Documentation

get_data() [1/2]

std::string & joedb::Memory_File::get_data ( )

inline

Definition at line 23 of file Memory_File.h.

get_data() [2/2]

const std::string & joedb::Memory_File::get_data ( ) const

inline

Definition at line 24 of file Memory_File.h.

get_size()

int64_t joedb::Memory_File::get_size ( ) const

inlineoverridevirtual

Reimplemented from joedb::Abstract_File.

Definition at line 27 of file Memory_File.h.

move_data()

std::string joedb::Memory_File::move_data ( ) const

inline

Definition at line 25 of file Memory_File.h.

pread()

size_t joedb::Memory_File::pread ( char *  data, size_t  size, int64_t  offset  ) const

overridevirtual

The returned value may be less than size, even if the end of the file is not reached. 0 is returned if the end of the file is reached.

Reimplemented from joedb::Abstract_File.

Definition at line 8 of file Memory_File.cpp.

pwrite()

void joedb::Memory_File::pwrite ( const char *  data, size_t  size, int64_t  offset  )

overridevirtual

Reimplemented from joedb::Abstract_File.

Definition at line 20 of file Memory_File.cpp.

resize()

void joedb::Memory_File::resize ( size_t  size )

inline

Definition at line 22 of file Memory_File.h.

Member Data Documentation

data

std::string joedb::Memory_File::data

protected

Definition at line 14 of file Memory_File.h.

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The documentation for this class was generated from the following files:

• /home/rcoulom/repos/joedb/src/joedb/journal/Memory_File.h
• /home/rcoulom/repos/joedb/src/joedb/journal/Memory_File.cpp