NAME
_lwp_unpark_all —
resume execution of a
waiting LWP
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <lwp.h>
ssize_t
_lwp_unpark_all(
const
lwpid_t *targets,
size_t
ntargets,
const void
*hint);
DESCRIPTION
_lwp_unpark_all() resumes execution of one or more
light-weight processes listed in the array pointed to by
targets.
The target LWPs are assumed to be waiting in the kernel as a result of calls to
_lwp_park(). If any of the target LWPs are not currently
waiting, those LWPs will return immediately upon the next call to
_lwp_park().
The value pointed to by
ntargets specifies the size of the
array pointed to by
targets. If the
targets argument is given as
NULL, the maximum size of the array (expressed as the
number of entries) is returned.
See
_lwp_park(2) for a
description of the
hint argument.
RETURN VALUES
If the maximum size of the
targets array is not being
queried, a return of 0 indicates that the call succeeded. A -1 return value
indicates an error occurred and
errno is set to indicate
the reason.
ERRORS
-
-
- [
EFAULT]
- The value specified for targets is
invalid.
-
-
- [
EINVAL]
- The value specified for ntargets is
out of range.
-
-
- [
ENOMEM]
- Insufficient resources are available to complete the
operation.
SEE ALSO
_lwp_park(2),
_lwp_unpark(2),
_lwp_wakeup(2)
HISTORY
The
_lwp_unpark_all() system call first appeared in
NetBSD 5.0.