Execute functions before exiting: Difference between revisions
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Created page with " Sometimes it is necessary to execute functions when slang/isis is closed. In slang scripts this can be easily done via the <code>atexit</code> function. For example: <pre>..." |
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For example: | For example: | ||
< | <syntaxhighlight lang="c" line='line'> | ||
define my_exit_function () { vmessage("Exit time: %s", strftime("%H:%M:%S")); } | define my_exit_function () { vmessage("Exit time: %s", strftime("%H:%M:%S")); } | ||
atexit(&my_exit_function); | atexit(&my_exit_function); | ||
</ | </syntaxhighlight> | ||
will print the exit time of the slang/isis process to <code>stdout</code>. | will print the exit time of the slang/isis process to <code>stdout</code>. | ||
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The same behaviour can be accomplished in an slang module written in C. The function that needs to be called gets appended via | The same behaviour can be accomplished in an slang module written in C. The function that needs to be called gets appended via | ||
< | <syntaxhighlight lang="c" line='line'> | ||
void my_module_exit_function (void) { | void my_module_exit_function (void) { | ||
destroy(global_object); | destroy(global_object); | ||
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SLang_add_cleanup_function(&my_module_exit_function); | SLang_add_cleanup_function(&my_module_exit_function); | ||
</ | </syntaxhighlight> | ||
This might be necessary when memory is allocated and used until the very end. | This might be necessary when memory is allocated and used until the very end. | ||
[[Category:Isis / Slang]] | [[Category:Isis / Slang]] | ||
Revision as of 11:08, 13 August 2018
Sometimes it is necessary to execute functions when slang/isis is closed. In slang scripts this can be easily done via the atexit function.
For example:
define my_exit_function () { vmessage("Exit time: %s", strftime("%H:%M:%S")); }
atexit(&my_exit_function);
will print the exit time of the slang/isis process to stdout.
Exit function in C
The same behaviour can be accomplished in an slang module written in C. The function that needs to be called gets appended via
void my_module_exit_function (void) {
destroy(global_object);
printf("Cleaning up mess!");
}
SLang_add_cleanup_function(&my_module_exit_function);
This might be necessary when memory is allocated and used until the very end.