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Command: _lwp_wait | Section: 2 | Source: NetBSD | File: _lwp_wait.2
_LWP_WAIT(2) FreeBSD System Calls Manual _LWP_WAIT(2)
NAME
_lwp_wait - wait for light-weight process termination
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <lwp.h>
int
_lwp_wait(lwpid_t wlwp, lwpid_t *rlwp);
DESCRIPTION
_lwp_wait() suspends execution of the calling LWP until the LWP specified
by wlwp terminates. The specified LWP must not be detached. If wlwp is
0, then _lwp_wait() waits for any undetached LWP in the current process.
If rlwp is not NULL, then it points to the location where the LWP ID of
the exited LWP is stored.
RETURN VALUES
The _lwp_wait() 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
_lwp_wait() will fail if:
[ESRCH] No LWP can be found in the current process
corresponding to that specified by wlwp.
[EDEADLK] The calling LWP is the only LWP in the process.
[EDEADLK] The LWP ID specified by wlwp is the LWP ID of the
calling LWP.
[EINVAL] The LWP specified by wlwp is detached.
[EINTR] _lwp_wait() was interrupted by a caught signal, or the
signal did not have the SA_RESTART flag set.
SEE ALSO
_lwp_create(2), _lwp_exit(2)
HISTORY
The _lwp_wait() system call first appeared in NetBSD 2.0.
FreeBSD 14.1-RELEASE-p8 December 4, 2022 FreeBSD 14.1-RELEASE-p8