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semv
POSIX-style System V Semaphores
Description
Mimic the POSIX semaphore API with System V semaphores.
Usage
semv_open(value = 0) semv_post(sid, undo = TRUE) semv_wait(sid, undo = TRUE) semv_unlink(sid)
Arguments
value |
the initial value of the semaphore to create ( |
sid |
the semaphore id as returned by |
undo |
should the operations (decrement/increment) on the semaphore be undone on process termination. This feature is probably the main reason to prefer System V semaphores to POSIX ones. |
Value
For semv_open, an object of class "semv", which is an integer
referring to the System V semaphore. All other functions return NULL
invisibly and are called for their side effects.
Windows Support
Not supported on Windows.
Lifecycle
![options:
alt='[Experimental]'](../help/figures/lifecycle-experimental.svg)