filelock

Locks the specified file.

filelock <file handle> [<timeout>]

Remarks

Locks the specified whole file for exclusive access by the calling process.
The <timeout> argument is described below.

<timeout> Description
0 Returns quickly the error when the file is already locked.
Abbreviation Returns only when the file is unlocked.
Value Waits until the file is unlocked or the time-out interval(in seconds) elapses. Returns the error when the time-out interval elapsed.

If the function succeeds, the system variable "result" is set to 0.
If the function fails, the system variable "result" is set to 1.

Examples

fileopen fhandle 'test.txt' 0
filelock fhandle
if result!=0 then
	messagebox 'error' 'hoge'
endif
filewrite fhandle 'sample'
pause 60
fileunlock fhandle
if result!=0 then
	messagebox 'error' 'hoge'
endif
fileclose fhandle

See also