Changeset b8d453ec in mainline for uspace/lib/usb/src/host/device_keeper.c

Timestamp:

2011-03-25T17:18:46Z (14 years ago)

Author:

Jan Vesely <jano.vesely@…>

Branches:

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

Children:

9a2923d

Parents:

da3dafc (diff), 095b2017 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

Fixes issue #122.

New allocator on not cached memory.
Only one control transfer per device as allowed

File:

• uspace/lib/usb/src/host/device_keeper.c (modified) (4 diffs)

uspace/lib/usb/src/host/device_keeper.c

@@ -49 +49 @@
         assert(instance);
         fibril_mutex_initialize(&instance->guard);
-        fibril_condvar_initialize(&instance->default_address_occupied);
+        fibril_condvar_initialize(&instance->change);
         instance->last_address = 0;
         unsigned i = 0;
         for (; i < USB_ADDRESS_COUNT; ++i) {
                 instance->devices[i].occupied = false;
+                instance->devices[i].control_used = false;
                 instance->devices[i].handle = 0;
                 instance->devices[i].toggle_status[0] = 0;
@@ -71 +72 @@
         fibril_mutex_lock(&instance->guard);
         while (instance->devices[USB_ADDRESS_DEFAULT].occupied) {
-                fibril_condvar_wait(&instance->default_address_occupied,
-                    &instance->guard);
+                fibril_condvar_wait(&instance->change, &instance->guard);
         }
         instance->devices[USB_ADDRESS_DEFAULT].occupied = true;
@@ -90 +90 @@
         instance->devices[USB_ADDRESS_DEFAULT].occupied = false;
         fibril_mutex_unlock(&instance->guard);
-        fibril_condvar_signal(&instance->default_address_occupied);
+        fibril_condvar_signal(&instance->change);
 }
 /*----------------------------------------------------------------------------*/
@@ -309 +309 @@
         return instance->devices[address].speed;
 }
-
+/*----------------------------------------------------------------------------*/
+void usb_device_keeper_use_control(usb_device_keeper_t *instance,
+    usb_address_t address)
+{
+        assert(instance);
+        fibril_mutex_lock(&instance->guard);
+        while (instance->devices[address].control_used) {
+                fibril_condvar_wait(&instance->change, &instance->guard);
+        }
+        instance->devices[address].control_used = true;
+        fibril_mutex_unlock(&instance->guard);
+}
+/*----------------------------------------------------------------------------*/
+void usb_device_keeper_release_control(usb_device_keeper_t *instance,
+    usb_address_t address)
+{
+        assert(instance);
+        fibril_mutex_lock(&instance->guard);
+        instance->devices[address].control_used = false;
+        fibril_mutex_unlock(&instance->guard);
+        fibril_condvar_signal(&instance->change);
+}
 /**
  * @}