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RESTART PROCEDURES

SPECPR is currently running on an LSI 11/23 with a UNIX operating system. This program has increased in size so that it no longer runs as a single job on the LSI 11/23. Its was necessary to break up the major areas of SPECPR into separate executable modules. The SPECPR program driver sets up the important parameters for running the program, or reads the restart file for these parameters and start up the excutable modules. These executable modules are separate processes that the main program starts up. In turn these modules can also start up other processes. These modules are as follows: HTML-IMAGE.nr 3c 0

PROCESS NAME                DESCRIPTION                CALLED BY





dspecpr        main program                            ------





reddisv        Display and Transfer, Math routines     dspecpr





extnct         Extinction Calculations and starpacks   dspecpr





rstdump        Restart file summary                    dspecpr





gpplot         Plotting package                        dspecpr





gfit           Gaussian fitting program                dspecpr





fit            Fitting routine                         gfit





f2             Special Function 2                      reddisv





f5             Special Function 5                      reddisv





f6             Special Function 6                      reddisv





f7             Special Function 7                      reddisv





f8             Special Function 8                      reddisv





f9             Special Function 9                      reddisv





f10            Special Function 10                     reddisv





f11            Special Function 11                     reddisv





f12            Special Function 12                     reddisv





f13            Special Function 13                     reddisv





f14            Special Function 14                     reddisv





f15            Special Function 15                     reddisv





f16            Special Function 16                     reddisv





f17            Special Function 17                     reddisv





f18            Special Function 18                     reddisv





f19            Special Function 19                     reddisv





f20            Special Function 20                     reddisv





f21            Special Function 21                     reddisv





f22            Special Function 22                     reddisv





f23            Special Function 23                     reddisv





wegadd         Addition routine                        reddisv





wfcn           Algebraic and Trig functions            reddisv

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Passing parameters and data between these processes are done via the restart file. The parent process calls the restart subroutine prior to starting up the child process to save the current restart parameters. When the child process starts up it calls the restart subroutine to read the parameters saved by the parent. Before the child terminates it calls the restart subroutine to save the parameters for the parent. Note: on the LSI 11/23 this takes a few seconds.

To start up a process from the program you make a call to this function:

        function ixecut(program)

where program is the process/program name

This function forks and executes the program whose name (null padded) is in the string "program". This function returns the ending status of the program. See function ixecute.

EXAMPLE:

c    MAIN PROGRAM
c
        common /restart/.... contains the necessary commons
        .
        .
        .
        st = ixecut(someprog)
        .
        .
        stop
        end

c
c   Child process
c
        common /restart/ ...... contains the necessary common
        call restart(2)
        .
        .
        .
        call restart(1)
        stop
        end