riot-ci/RIOT
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

usbus: simplify adding entry to list

Browse Source
This commit is contained in:
Kees Bakker 2019-06-05 23:40:09 +02:00
parent abf4d60286
commit 4a06b9109b
1 changed files with 8 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
sys/usb/usbus/usbus.c
View File

@ -107,37 +107,24 @@ uint16_t usbus_add_interface(usbus_t *usbus, usbus_interface_t *iface)
* usages. Furthermore, the O(1) append is not really necessary as this is * usages. Furthermore, the O(1) append is not really necessary as this is
* only used at init */ * only used at init */
uint16_t idx = 0; uint16_t idx = 0;
usbus_interface_t *last = usbus->iface; usbus_interface_t **last = &usbus->iface;
while (*last) {
if (last) { last = &(*last)->next;
idx++; idx++;
while (last->next) {
last = last->next;
idx++;
}
last->next = iface;
}
else {
usbus->iface = iface;
} }
iface->idx = idx; iface->idx = idx;
*last = iface;
return idx; return idx;
} }
void usbus_register_event_handler(usbus_t *usbus, usbus_handler_t *handler) void usbus_register_event_handler(usbus_t *usbus, usbus_handler_t *handler)
{ {
/* See note above for reasons against clist.h */ /* See note above for reasons against clist.h */
usbus_handler_t *last = usbus->handlers; usbus_handler_t **last = &usbus->handlers;
while (*last) {
if (last) { last = &(*last)->next;
while (last->next) {
last = last->next;
}
last->next = handler;
}
else {
usbus->handlers = handler;
} }
*last = handler;
} }
usbus_endpoint_t *usbus_add_endpoint(usbus_t *usbus, usbus_interface_t *iface, usbus_endpoint_t *usbus_add_endpoint(usbus_t *usbus, usbus_interface_t *iface,