Changeset f527f58 in mainline for uspace/lib/usbhost/include/usb/host/endpoint.h

Timestamp:

2016-08-03T11:12:24Z (9 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

96ef672

Parents:

e657635

Message:

Reference-count endpoint_t structures

Track explicit references to USB endpoints. Call endpoint_destroy()
only after the last reference is destroyed. This prevents the scenario
in which removal was attempted on an endpoint while there was a transfer
in progress.

File:

• uspace/lib/usbhost/include/usb/host/endpoint.h (modified) (2 diffs)

uspace/lib/usbhost/include/usb/host/endpoint.h

@@ -40 +40 @@
 #include <fibril_synch.h>
 #include <usb/usb.h>
+#include <atomic.h>
 
 /** Host controller side endpoint structure. */
 typedef struct endpoint {
+        /** Reference count. */
+        atomic_t refcnt;        
         /** Part of linked list. */
         link_t link;
@@ -91 +94 @@
 void endpoint_destroy(endpoint_t *instance);
 
+void endpoint_add_ref(endpoint_t *instance);
+void endpoint_del_ref(endpoint_t *instance);
+
 void endpoint_set_hc_data(endpoint_t *instance,
     void *data, int (*toggle_get)(void *), void (*toggle_set)(void *, int));