Updated: 2021/Apr/14

_LWP_UNPARK(2)                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
     A 0 value indicates that the call succeeded.  A -1 return value indicates
     an error occurred and errno is set to indicate the reason.

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.

NetBSD 9.99                    January 20, 2007                    NetBSD 9.99