[comp.sys.apollo] closing bitmap files

dennis@PEANUTS.NOSC.MIL (Dennis Cottel) (11/03/88)

One of our users had what sounds like an identical problem.  He wanted
to manipulate a GPR bitmap file from a program, release the file for
other uses without terminating the manipulating program, then reopen
the same file again later.

He called Apollo and was told to call "gpr_$deallocate_bitmap.
However, even though "gpr_$deallocate_bitmap" closes the GPR bitmap
file opened with "gpr_$open_bitmap_file", the file remains locked by
the system until the program which opened the file terminates.  Thus,
the executing program cannot reopen the same GPR bitmap file more than
once in the same execution.  Under some strange and intermittent
circumstances, he says the file remains locked even after the calling
program terminates.

He still has no solution.

	Dennis Cottel  Naval Ocean Systems Center, San Diego, CA  92152
	(619) 553-1645      dennis@nosc.MIL      sdcsvax!noscvax!dennis