Determine if only one instance is running: Difference between revisions
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(Added BaCon version.) |
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=={{header|AutoHotkey}}== |
=={{header|AutoHotkey}}== |
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AutoHotkey has a #SingleInstance command. If you run two scripts that don't have it at the same time, it alerts the user. #SingleInstance FORCE closes the older instance when a newer one is run, and #SingleInstance IGNORE does nothing when you try to open a new instance of an already-running script. |
AutoHotkey has a #SingleInstance command. If you run two scripts that don't have it at the same time, it alerts the user. #SingleInstance FORCE closes the older instance when a newer one is run, and #SingleInstance IGNORE does nothing when you try to open a new instance of an already-running script. |
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=={{header|BaCon}}== |
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Using advisory locks from libc. |
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<lang bacon>PRAGMA INCLUDE <sys/file.h> |
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OPTION DEVICE O_NONBLOCK |
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OPEN ME$ FOR DEVICE AS me |
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IF flock(me, LOCK_EX | LOCK_NB) <> 0 THEN |
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PRINT "I am blocked, exiting..." |
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END |
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ENDIF |
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PRINT "Running this program, doing things..." |
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SLEEP 5000 |
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CLOSE DEVICE me</lang> |
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=={{header|Bash Shell}}== |
=={{header|Bash Shell}}== |
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