vasilito
ff4ff35918
Red Bear OS is a full fork. All sources must be available from git clone with zero network access. Removed gitignore rules that excluded fetched source trees under recipes/*/source/, local/recipes/kde/*/source/, local/recipes/qt/*/source/, and vendor source trees. Build artifacts (target/, build/, source.tar, *.o, *.so) remain excluded. 127291 files added — kernel, relibc, base, bootloader, pkgar, all KDE/Qt frameworks, mesa, wayland, DRM drivers, and every other recipe source.
52 lines
1.1 KiB
C
52 lines
1.1 KiB
C
/* insque(3C) routines
|
|
This file is in the public domain. */
|
|
|
|
/*
|
|
|
|
@deftypefn Supplemental void insque (struct qelem *@var{elem}, @
|
|
struct qelem *@var{pred})
|
|
@deftypefnx Supplemental void remque (struct qelem *@var{elem})
|
|
|
|
Routines to manipulate queues built from doubly linked lists. The
|
|
@code{insque} routine inserts @var{elem} in the queue immediately
|
|
after @var{pred}. The @code{remque} routine removes @var{elem} from
|
|
its containing queue. These routines expect to be passed pointers to
|
|
structures which have as their first members a forward pointer and a
|
|
back pointer, like this prototype (although no prototype is provided):
|
|
|
|
@example
|
|
struct qelem @{
|
|
struct qelem *q_forw;
|
|
struct qelem *q_back;
|
|
char q_data[];
|
|
@};
|
|
@end example
|
|
|
|
@end deftypefn
|
|
|
|
*/
|
|
|
|
|
|
struct qelem {
|
|
struct qelem *q_forw;
|
|
struct qelem *q_back;
|
|
};
|
|
|
|
|
|
void
|
|
insque (struct qelem *elem, struct qelem *pred)
|
|
{
|
|
elem -> q_forw = pred -> q_forw;
|
|
pred -> q_forw -> q_back = elem;
|
|
elem -> q_back = pred;
|
|
pred -> q_forw = elem;
|
|
}
|
|
|
|
|
|
void
|
|
remque (struct qelem *elem)
|
|
{
|
|
elem -> q_forw -> q_back = elem -> q_back;
|
|
elem -> q_back -> q_forw = elem -> q_forw;
|
|
}
|