Function sblock

freebsd/kern/uipc_sockbuf.c:454–473

}

int
sblock(struct sockbuf *sb, int flags)
{

	KASSERT((flags & SBL_VALID) == flags,
	    ("sblock: flags invalid (0x%x)", flags));

	if (flags & SBL_WAIT) {
		if ((sb->sb_flags & SB_NOINTR) ||
		    (flags & SBL_NOINTR)) {
			sx_xlock(&sb->sb_sx);
			return (0);
		}
		return (sx_xlock_sig(&sb->sb_sx));
	} else {
		if (sx_try_xlock(&sb->sb_sx) == 0)
			return (EWOULDBLOCK);
		return (0);
	}
}

void
sbunlock(struct sockbuf *sb)