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206 lines
8.1 KiB
206 lines
8.1 KiB
/*
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* Copyright (C) 2009 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_USB_API_ADB_WINUSB_INTERFACE_H__
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#define ANDROID_USB_API_ADB_WINUSB_INTERFACE_H__
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/** \file
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This file consists of declaration of class AdbWinUsbInterfaceObject
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that encapsulates an interface on our USB device that is accessible
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via WinUsb API.
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*/
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#include "..\api\adb_interface.h"
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/** \brief Encapsulates an interface on our USB device that is accessible
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via WinUsb API.
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*/
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class AdbWinUsbInterfaceObject : public AdbInterfaceObject {
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public:
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/** \brief Constructs the object.
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@param[in] interf_name Name of the interface
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*/
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explicit AdbWinUsbInterfaceObject(const wchar_t* interf_name);
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protected:
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/** \brief Destructs the object.
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We hide destructor in order to prevent ourseves from accidentaly allocating
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instances on the stack. If such attemp occur, compiler will error.
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*/
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virtual ~AdbWinUsbInterfaceObject();
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//
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// Virtual overrides
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//
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public:
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/** \brief Releases the object.
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If refcount drops to zero as the result of this release, the object is
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destroyed in this method. As a general rule, objects must not be touched
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after this method returns even if returned value is not zero. We override
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this method in order to make sure that objects of this class are deleted
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in contect of the DLL they were created in. The problem is that since
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objects of this class were created in context of AdbWinUsbApi module, they
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are allocated from the heap assigned to that module. Now, if these objects
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are deleted outside of AdbWinUsbApi module, this will lead to the heap
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corruption in the module that deleted these objects. Since all objects of
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this class are deleted in the Release method only, by overriding it we make
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sure that we free memory in the context of the module where it was
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allocated.
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@return Value of the reference counter after object is released in this
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method.
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*/
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virtual LONG Release();
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/** \brief Creates handle to this object.
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In this call a handle for this object is generated and object is added
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to the AdbObjectHandleMap. We override this method in order to initialize
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WinUsb API for the given interface.
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@return A handle to this object on success or NULL on an error.
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If NULL is returned GetLastError() provides extended error
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information. ERROR_GEN_FAILURE is set if an attempt was
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made to create already opened object.
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*/
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virtual ADBAPIHANDLE CreateHandle();
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/** \brief This method is called when handle to this object gets closed.
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In this call object is deleted from the AdbObjectHandleMap. We override
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this method in order close WinUsb handle created in CreateHandle method
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of this class.
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@return true on success or false if object is already closed. If
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false is returned GetLastError() provides extended error
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information.
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*/
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virtual bool CloseHandle();
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//
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// Abstract overrides
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//
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public:
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/** \brief Gets serial number for interface's device.
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@param[out] buffer Buffer for the serail number string. Can be NULL in
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which case buffer_char_size will contain number of characters
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required for the string.
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@param[in,out] buffer_char_size On the way in supplies size (in characters)
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of the buffer. On the way out, if method failed and GetLastError
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reports ERROR_INSUFFICIENT_BUFFER, will contain number of characters
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required for the name.
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@param[in] ansi If true the name will be returned as single character
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string. Otherwise name will be returned as wide character string.
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@return true on success, false on failure. If false is returned
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GetLastError() provides extended error information.
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*/
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virtual bool GetSerialNumber(void* buffer,
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unsigned long* buffer_char_size,
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bool ansi);
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/** \brief Gets information about an endpoint on this interface.
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@param[in] endpoint_index Zero-based endpoint index. There are two
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shortcuts for this parameter: ADB_QUERY_BULK_WRITE_ENDPOINT_INDEX
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and ADB_QUERY_BULK_READ_ENDPOINT_INDEX that provide infor about
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(default?) bulk write and read endpoints respectively.
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@param[out] info Upon successful completion will have endpoint information.
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@return true on success, false on failure. If false is returned
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GetLastError() provides extended error information.
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*/
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virtual bool GetEndpointInformation(UCHAR endpoint_index,
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AdbEndpointInformation* info);
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/** \brief Opens an endpoint on this interface.
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@param[in] endpoint_index Zero-based endpoint index. There are two
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shortcuts for this parameter: ADB_QUERY_BULK_WRITE_ENDPOINT_INDEX
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and ADB_QUERY_BULK_READ_ENDPOINT_INDEX that provide infor about
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(default?) bulk write and read endpoints respectively.
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@param[in] access_type Desired access type. In the current implementation
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this parameter has no effect on the way endpoint is opened. It's
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always read / write access.
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@param[in] sharing_mode Desired share mode. In the current implementation
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this parameter has no effect on the way endpoint is opened. It's
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always shared for read / write.
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@return Handle to the opened endpoint object or NULL on failure.
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If NULL is returned GetLastError() provides extended information
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about the error that occurred.
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*/
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virtual ADBAPIHANDLE OpenEndpoint(UCHAR endpoint_index,
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AdbOpenAccessType access_type,
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AdbOpenSharingMode sharing_mode);
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//
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// Operations
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//
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protected:
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/** \brief Opens an endpoint on this interface.
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@param[in] endpoint_id Endpoint (pipe) address on the device.
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@param[in] endpoint_index Zero-based endpoint index.
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@return Handle to the opened endpoint object or NULL on failure.
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If NULL is returned GetLastError() provides extended information
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about the error that occurred.
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*/
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ADBAPIHANDLE OpenEndpoint(UCHAR endpoint_id, UCHAR endpoint_index);
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public:
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/// Gets handle to the USB device
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HANDLE usb_device_handle() const {
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return usb_device_handle_;
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}
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/// Gets interface handle used by WinUSB API
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WINUSB_INTERFACE_HANDLE winusb_handle() const {
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return winusb_handle_;
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}
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/// Gets current interface number.
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UCHAR interface_number() const {
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return interface_number_;
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}
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protected:
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/// Handle to the USB device
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HANDLE usb_device_handle_;
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/// Interface handle used by WinUSB API
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WINUSB_INTERFACE_HANDLE winusb_handle_;
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/// Current interface number. This value is obtained via call to
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/// WinUsb_GetCurrentAlternateSetting and is used in WinUsb_Xxx
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/// calls that require interface number.
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UCHAR interface_number_;
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/// Index for the default bulk read endpoint
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UCHAR def_read_endpoint_;
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/// ID for the default bulk read endpoint
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UCHAR read_endpoint_id_;
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/// Index for the default bulk write endpoint
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UCHAR def_write_endpoint_;
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/// ID for the default bulk write endpoint
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UCHAR write_endpoint_id_;
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};
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#endif // ANDROID_USB_API_ADB_WINUSB_INTERFACE_H__
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