MMAP Reader

class MmapReader

Memory-mapped file reader.

Provides efficient file reading using memory mapping (mmap). The file contents are mapped directly into memory without copying.

Public Types

enum class Mode

Values:

enumerator kReadOnly

Read-only shared file mapping.

enumerator kCopyOnWrite

Writable copy-on-write mapping; writes cannot modify the file.

Public Functions

MmapReader() noexcept

Default constructor.

explicit MmapReader(

std::filesystem::path const &fp,

Mode mode = Mode::kReadOnly

)

Construct and load file.

Parameters:

• fp – Path to file to load

• mode – Mapping protection and sharing mode

Throws:

std::runtime_error – If file cannot be loaded

MmapReader(MmapReader const&) = delete

Deleted copy constructor.

MmapReader &operator=(MmapReader const&) = delete

Deleted copy assignment operator.

~MmapReader() noexcept

Destructor.

void release() noexcept

Release mapped memory.

bool loadFile(

std::filesystem::path const &fp,

Mode mode = Mode::kReadOnly

)

Load and memory-map a file.

Parameters:

• fp – Path to file to load

• mode – Mapping protection and sharing mode

Returns:

True on success, false on failure

int8_t const *getByteData() const noexcept

Get mapped data as byte array.

Returns:

Const pointer to byte data

void const *getData() const noexcept

Get mapped data as void pointer.

Returns:

Const pointer to data

size_t getSize() const noexcept

Get size of mapped data.

Returns:

Size in bytes