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authorreillyg <reillyg@chromium.org>2014-08-28 18:58:43 -0700
committerCommit bot <commit-bot@chromium.org>2014-08-29 01:59:51 +0000
commite471fab8c731cfc2eacceca8cc5be524c2d6f4b4 (patch)
tree3ecc233a2dc5c66b1f980e335f1a92f027f2d95f /device/core/device_client.h
parenta859ef1cc6d20bd833c84cd2d126cf49440b16f7 (diff)
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Remove BrowserThread dependency from usb_service.
Instead of explicitly depending on specific browser threads the USB service can assume that it is instantiated on BrowserThread::FILE (or equivalent) and save a TaskRunner reference from this instantiation for later use when called from other threads. To reach BrowserThread::UI (required for DBus on Chrome OS) a reference to the appropriate TaskRunner must be provided when calling UsbService::GetInstance(). BUG= Review URL: https://codereview.chromium.org/507503002 Cr-Commit-Position: refs/heads/master@{#292546}
Diffstat (limited to 'device/core/device_client.h')
-rw-r--r--device/core/device_client.h39
1 files changed, 39 insertions, 0 deletions
diff --git a/device/core/device_client.h b/device/core/device_client.h
new file mode 100644
index 0000000..d8d938b
--- /dev/null
+++ b/device/core/device_client.h
@@ -0,0 +1,39 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef DEVICE_CORE_DEVICE_CLIENT_H_
+#define DEVICE_CORE_DEVICE_CLIENT_H_
+
+#include "base/macros.h"
+
+namespace usb_service {
+class UsbService;
+}
+
+namespace device {
+
+// Interface used by consumers of //device APIs to get pointers to the service
+// singletons appropriate for a given embedding application. For an example see
+// //chrome/browser/chrome_device_client.h.
+class DeviceClient {
+ public:
+ // Construction sets the single instance.
+ DeviceClient();
+
+ // Destruction clears the single instance.
+ ~DeviceClient();
+
+ // Returns the single instance of |this|.
+ static DeviceClient* Get();
+
+ // Returns the UsbService instance for this embedder.
+ virtual usb_service::UsbService* GetUsbService();
+
+ private:
+ DISALLOW_COPY_AND_ASSIGN(DeviceClient);
+};
+
+} // namespace device
+
+#endif // DEVICE_CORE_DEVICE_CLIENT_H_