_lwp_unpark(2) - NetBSD Manual Pages

_LWP_UNPARK(2)            NetBSD 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 correspond-
                        ing 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 10.99                   January 20, 2007                   NetBSD 10.99