EXEC Function Appnote Available with FORTRAN 5.x
ID: Q75223
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The information in this article applies to:
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Microsoft FORTRAN for MS-DOS, versions 5.0, 5.1
SUMMARY
The application note titled "EXEC Function for FORTRAN" contains a
function similar to the SPAWNLP function. The SPAWNLP function,
included in the Microsoft FORTRAN 5.0 and 5.1 packages, suspends
program execution and spawns a child process while leaving the parent
process in memory. When this child process terminates, control returns
to the parent process. On the other hand, the EXEC function terminates
the parent process, taking the parent process out of memory, and then
spawns the child process. Upon termination of the child process, the
program is completed.
This application note "EXEC Function for FORTRAN" can be obtained by
calling Microsoft Product Support Services.
This application note is also available in the Microsoft Software Library.
MORE INFORMATION
The following file is available for download from the Microsoft
Download Center. Click the file name below to download the file:
hf0221.exe
For more information about how to download files from the Microsoft
Download Center, please visit the Download Center at the following Web
address
http://www.microsoft.com/downloads/search.asp
and then click How to use the Microsoft Download Center.
The following is the text of the application note:
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HF0221: FORTRAN EXEC Function
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Revision Date: 8/91
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| INFORMATION PROVIDED IN THIS DOCUMENT AND ANY SOFTWARE THAT MAY |
| ACCOMPANY THIS DOCUMENT (collectively referred to as an |
| Application Note) IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY |
| KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO |
| THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A |
| PARTICULAR PURPOSE. The user assumes the entire risk as to the |
| accuracy and the use of this Application Note. This Application |
| Note may be copied and distributed subject to the following |
| conditions: 1) All text must be copied without modification and |
| all pages must be included; 2) If software is included, all files |
| on the disk(s) must be copied without modification [the MS-DOS(R) |
| utility DISKCOPY is appropriate for this purpose]; 3) All |
| components of this Application Note must be distributed together; |
| and 4) This Application Note may not be distributed for profit. |
| |
| Copyright 1991 Microsoft Corporation. All Rights Reserved. |
| Microsoft, MS-DOS, and the Microsoft logo are registered |
| trademarks and Windows is a trademark of Microsoft Corporation. |
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Simulating the P_OVERLAY Function of _spawnlp with the Microsoft
FORTRAN Optimizing Compiler Versions 4.0, 4.01, 4.1, 5.0, and 5.1
Versions 4.0, 4.01, 4.1, 5.0, and 5.1 of the Microsoft FORTRAN
Optimizing Compiler do not support the option within the _spawnlp
function that allows a second user program to completely overwrite the
space used by the program that initiates it. The programs supplied
with this application note use a slightly different mechanism to
provide this missing functionality. The EXEC function works under the
DOS operating system only.
The following files are provided on the FORTRAN 4.0, 4.01, 4.1, 5.0,
5.1 EXEC Function disk included with this application note:
Filename Description of File
-------- -------------------
README.DOC Text of application note.
EXEC.INC A FORTRAN INTERFACE file that must be included
in every source file calling EXEC.
LV40EXEC.LIB Large memory model library for version 4.0 and
4.01 containing the routines necessary to
perform an EXEC.
MV40EXEC.LIB Medium memory model library for version 4.0 and
4.01 containing the routines necessary to
perform an EXEC.
LV41EXEC.LIB Large memory model library for versions 4.1 and
5.0 containing the routines necessary to
perform an EXEC.
MV41EXEC.LIB Medium memory model library for versions 4.1
and 5.0 containing the routines necessary to
perform an EXEC.
LV51EXEC.LIB Large memory model library for version 5.1
containing the routines necessary to perform an
EXEC.
MV51EXEC.LIB Medium memory model library for version 5.1
containing the routines necessary to perform an
EXEC.
TEST1.FOR Program to test an EXEC. It is more than
300,000 bytes in size and will EXEC the TEST2
program, which is of similar size. The
intention is to show that the two programs,
TEST1.FOR and EST2.FOR, which cannot fit in
memory at the same time, can be executed
individually.
TEST2.FOR Program to be executed by TEST1.
Link the program that calls EXEC (TEST1 in this case) with the
appropriate library listed above. For example, when using FORTRAN 5.1
for the large memory model, the compile line should look as follows:
fl test1.for LV51EXEC.LIB
This will compile TEST1.FOR and link it with the FORTRAN run-time
library in addition to the EXEC function library specified.
NOTE: TEST1 and TEST2 are completely independent of each other. They
can even be compiled with different memory models.
Additional query words:
Keywords : kbfile
Version : :5.0,5.1
Platform : MS-DOS
Issue type : kbinfo