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_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
     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.

NetBSD 11.99                   January 20, 2007                   NetBSD 11.99