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
void	exclusive_lock_head ()
void	shared_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

For very large reads, the returned value may be less than size, even if the end of the file is not reached. It is assumed that small reads (such as the 41 bytes of the joedb header) will not be truncated. 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