plock.2 (2010 09)

plock(2) plock(2)

[EINVAL] op is equal to

PROCSHLIBLOCK

and a process lock, a text lock, or a data lock

already exists on the calling process.

[EINVAL] op is equal to

TXTSHLIBLOCK and a text lock or process lock already exists on the

calling process.

[EINVAL] op is equal to

DATSHLIBLOCK and a data lock, or process lock already exists on the

calling process.

[EINVAL] op is not equal to one of the values speciﬁed in DESCRIPTION.

[EINVAL]

plock() is not allowed in a [vfork,exec] window. See vfork (2).

[ENOMEM] There is not enough lockable memory in the system to satisfy the locking request.

[EPERM] The effective user ID of the calling process is not a user with the

MLOCK privilege.

EXAMPLES

The following call to

plock() locks the calling process in memory:

plock(PROCLOCK);