_LWP_UNPARK(2) System Calls Manual _LWP_UNPARK(2)

_lwp_unpark — resume execution of a waiting LWP

Standard C Library (libc, -lc)

#include <lwp.h>

int
_lwp_unpark(lwpid_t lwp, const void *hint);

() 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 (). 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.

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.

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No LWP can be found in the current process corresponding to that specified by lwp.

_lwp_park(2), _lwp_unpark_all(2), _lwp_wakeup(2)

The _lwp_unpark() system call first appeared in NetBSD 5.0.

January 20, 2007 NetBSD 11.0