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MyFSD_CloseFile (Compact 2013)

  • Article

3/26/2014

This function is called when an application closes an open handle for an open file in an installable file system. The application does not call this function directly. Instead, it uses the standard CloseHandle function. The File System Disk Manager (FSDMGR) determines the file system type and calls this implementation of the function.

Syntax

BOOL MyFSD_CloseFile( 
  PFILE pFile
);

Parameters

  • pFile
    [in] Pointer to the value that the FSD passed to the FSDMGR_CreateFileHandle function when creating the file handle.

Return Value

Nonzero indicates success. Zero indicates failure. To get extended error information, call GetLastError.

Remarks

To close a file, the FSD calls CloseFile. An FSD typically calls CloseFile to close files when it is shutting down.

All FSD functions can be called at re-entry. Therefore, take this into account when developing an FSD.

FSDMGR is a DLL that manages all OS interaction with installable files systems. Each installable file system requires an FSD, which is a DLL that supports an installable file system. The name of the DLL for the FSD and the names of the functions it exports start with the name of the associated installable file system. For example, if the name of file system is MyFSD, its DLL is MyFSD.dll and its exported functions are prefaced with MyFSD_*.

FSDMGR provides service functions to FSDs. The FSDMGR_RegisterVolume, the FSDMGR_CreateFileHandle, and the FSDMGR_CreateSearchHandle functions record a DWORD of volume-specific data an FSD needs to keep associated with volume. This volume-specific data is passed as the first parameter of these three functions.

Applications that access an installable file system use standard Win32 functions. For example, when an application creates a folder on a device that contains an installable file system, it calls the CreateDirectory function. FSDMGR component recognizes that the path is to a device containing an installable file system and calls the appropriate function, which in the case of the MyFSD file system is the MyFSD_CreateDirectoryW function. That is, the application calls CreateDirectory, causing FSDMGR to call MyFSD_CreateDirectoryW.

Requirements

Header

fsdmgr.h

Library

Fsdmgr.lib

See Also

Reference

MyFSD Functions
CreateDirectory
CloseHandle
FSDMGR_CreateFileHandle
FSDMGR_RegisterVolume
MyFSD_CreateDirectoryW
MyFSD_CreateFileW
MyFSD_DeleteFileW
MyFSD_FindClose
MyFSD_FindFirstFileW