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#include <FXMemMap.h>
Public Types | |
enum | { NONE = 0, READ = 1, WRITE = 2, EXEC = 4, TRUNC = 8 } |
enum | { PRIV = 0, SHAR = 1 } |
Public Member Functions | |
FXMemMap () | |
void * | mapFile (const FXString &filename, long off=0, long len=-1L, FXuint access=READ, FXuint share=PRIV) |
void * | unmap () |
void | sync () |
void * | base () const |
long | length () const |
long | offset () const |
~FXMemMap () |
A Memory Map provides a view of a file as an array of memory; this allows the file itself to be used as backing for the data and very simplified file access results.
Moreover, mapped files may be shared by processes, resuling in far less "real" memory being used than would otherwise be the case.
anonymous enum |
Construct a memory map.
Destroy the map.
void* FX::FXMemMap::mapFile | ( | const FXString & | filename, |
long | off = 0 , |
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long | len = -1L , |
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FXuint | access = READ , |
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FXuint | share = PRIV |
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) |
Map a view of the file; the offset must be a multiple of the page size.
void* FX::FXMemMap::unmap | ( | ) |
Unmap the view of the file.
void FX::FXMemMap::sync | ( | ) |
Synchronize disk.
void* FX::FXMemMap::base | ( | ) | const [inline] |
Return pointer to memory area.
long FX::FXMemMap::length | ( | ) | const [inline] |
Obtain length of the map.
long FX::FXMemMap::offset | ( | ) | const [inline] |
Obtain offset of the map.
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