sem {bettermc}

R Documentation

Named POSIX Semaphores

Description

Named POSIX Semaphores

Usage

sem_open(name, create = FALSE, overwrite = FALSE, value = 0)

sem_post(sem)

sem_wait(sem)

sem_close(sem)

sem_unlink(name)

Arguments

name	the name of the semaphore. Consult man sem_overview for what makes a valid name.
create	should the semaphore be created if it currently does not exist?
overwrite	if create == TRUE, should we overwrite an already existing semaphore with the name (TRUE) or rather fail (FALSE).
value	the initial value of the semaphore (>= 0).
sem	an object as returned by sem_open.

Value

For sem_open, an object of class "sem", which is an external pointer to the POSIX semaphore. All other functions return NULL invisibly and are called for their side effects.

Windows Support

Not supported on Windows.

Lifecycle

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