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Command: _lwp_unpark | Section: 2 | Source: NetBSD | File: _lwp_unpark.2
_LWP_UNPARK(2) FreeBSD System Calls Manual _LWP_UNPARK(2)
NAME
_lwp_unpark - resume execution of a waiting LWP
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <lwp.h>
int
_lwp_unpark(lwpid_t lwp, const void *hint);
DESCRIPTION
_lwp_unpark() resumes execution of the light-weight process lwp.
The target LWP is assumed to be waiting in the kernel as a result of a
call to _lwp_park(). If the target LWP is not currently waiting, it will
return immediately upon the next call to _lwp_park().
See _lwp_park(2) for a description of the hint argument.
RETURN VALUES
The _lwp_unpark() function returns the value 0 if successful; otherwise
the value -1 is returned and the global variable errno is set to indicate
the error.
ERRORS
[ESRCH] No LWP can be found in the current process
corresponding to that specified by lwp.
SEE ALSO
_lwp_park(2), _lwp_unpark_all(2), _lwp_wakeup(2)
HISTORY
The _lwp_unpark() system call first appeared in NetBSD 5.0.
FreeBSD 14.1-RELEASE-p8 January 20, 2007 FreeBSD 14.1-RELEASE-p8