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std.mmfile

Read and write memory mapped files.

License:

Authors:

Walter Bright, Matthew Wilson

class MmFile;

MmFile objects control the memory mapped file resource.

enum Mode: int;

The mode the memory mapped file is opened with.

this(string filename);

Open memory mapped file filename for reading. File is closed when the object instance is deleted.

Throws:

this(string filename, Mode mode, ulong size, void* address, size_t window = 0);

Open memory mapped file filename in mode. File is closed when the object instance is deleted.

Parameters:

string `filename`	name of the file. If null, an anonymous file mapping is created.
Mode `mode`	access mode defined above.
ulong `size`	the size of the file. If 0, it is taken to be the size of the existing file.
void* `address`	the preferred address to map the file to, although the system is not required to honor it. If null, the system selects the most convenient address.
size_t `window`	preferred block size of the amount of data to map at one time with 0 meaning map the entire file. The window size must be a multiple of the memory allocation page size.

Throws:

const @property ulong length();

Gives size in bytes of the memory mapped file.

alias opDollar = length;

Forwards length.

Mode mode();

Read-only property returning the file mode.

void[] opSlice();

Returns entire file contents as an array.

void[] opSlice(ulong i1, ulong i2);

Returns slice of file contents as an array.

ubyte opIndex(ulong i);

Returns byte at index i in file.

ubyte opIndexAssign(ubyte value, ulong i);

Sets and returns byte at index i in file to value.

Library Reference