Modern Fs MemoryMappedFile IsOpen

Home › Filesystem › Filesystem Library › MemoryMappedFile.IsOpen

MemoryMappedFile.IsOpen

Returns true while a file is mapped.

Syntax

MemoryMappedFile.IsOpen( )

Examples

#import "std/fs"
using fs

dim td as FsResultUStr = CreateTempDir( "fbdoc" )
dim as ustring dir_ = td.Value( )
dim as ustring p = PathJoin( dir_, "f.txt" )
WriteAllText( p, "hello" )

dim mm as MemoryMappedFile
print mm.IsOpen( )           '' false -- nothing mapped yet

mm.Open( p )
print mm.IsOpen( )           '' true

mm.Close( )
print mm.IsOpen( )           '' false

'' The guard before Data( ) and Size( ), which have nothing to report
'' when the mapping is shut

RemoveDirAll( dir_ )

---

Library: Filesystem Library
Category: Filesystem
Documented under: Locking, Mapping And Watching