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fix(windows): close leaked resources #453

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38 changes: 25 additions & 13 deletions gap_windows.go
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Original file line number Diff line number Diff line change
Expand Up @@ -233,27 +233,36 @@ func getScanResultFromArgs(args *advertisement.BluetoothLEAdvertisementReceivedE

var manufacturerData []ManufacturerDataElement
var serviceUUIDs []UUID
if winAdv, err := args.GetAdvertisement(); err == nil && winAdv != nil {
// Extract manufacturer data
vector, _ := winAdv.GetManufacturerData()
size, _ := vector.GetSize()

// Extract manufacturer data
manDataVector, _ := winAdv.GetManufacturerData()
if manDataVector != nil {
defer manDataVector.Release()
size, _ := manDataVector.GetSize()
for i := uint32(0); i < size; i++ {
element, _ := vector.GetAt(i)
element, _ := manDataVector.GetAt(i)
manData := (*advertisement.BluetoothLEManufacturerData)(element)

companyID, _ := manData.GetCompanyId()
buffer, _ := manData.GetData()
manufacturerData = append(manufacturerData, ManufacturerDataElement{
CompanyID: companyID,
Data: bufferToSlice(buffer),
})
if buffer != nil {
manufacturerData = append(manufacturerData, ManufacturerDataElement{
CompanyID: companyID,
Data: bufferToSlice(buffer),
})
buffer.Release()
}
manData.Release()
}
}

// Extract service UUIDs
vector, _ = winAdv.GetServiceUuids()
size, _ = vector.GetSize()
// Extract service UUIDs
serviceUuidsVector, _ := winAdv.GetServiceUuids()
if serviceUuidsVector != nil {
defer serviceUuidsVector.Release()
size, _ := serviceUuidsVector.GetSize()
for i := uint32(0); i < size; i++ {
element, _ := vector.GetAt(i)
element, _ := serviceUuidsVector.GetAt(i)
// element is not a pointer, but a GUID struct. But we cannot convert
// unsafe.Pointer to a non-pointer type, so instead we are doing this:
serviceGUID := (*syscall.GUID)(unsafe.Pointer(&element))
Expand Down Expand Up @@ -342,6 +351,7 @@ func (a *Adapter) Connect(address Address, params ConnectionParams) (Device, err
if err != nil {
return Device{}, err
}
defer bleDeviceOp.Release()

// We need to pass the signature of the parameter returned by the async operation:
// IAsyncOperation<BluetoothLEDevice>
Expand All @@ -367,6 +377,7 @@ func (a *Adapter) Connect(address Address, params ConnectionParams) (Device, err
if err != nil {
return Device{}, err
}
defer dID.Release()

// Windows does not support explicitly connecting to a device.
// Instead it has the concept of a GATT session that is owned
Expand All @@ -375,6 +386,7 @@ func (a *Adapter) Connect(address Address, params ConnectionParams) (Device, err
if err != nil {
return Device{}, err
}
defer gattSessionOp.Release()

if err := awaitAsyncOperation(gattSessionOp, genericattributeprofile.SignatureGattSession); err != nil {
return Device{}, fmt.Errorf("error getting gatt session: %w", err)
Expand Down
17 changes: 17 additions & 0 deletions gattc_windows.go
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Original file line number Diff line number Diff line change
Expand Up @@ -53,6 +53,7 @@ func (d Device) DiscoverServices(filterUUIDs []UUID) ([]DeviceService, error) {
if err != nil {
return nil, err
}
defer getServicesOperation.Release()

if err := awaitAsyncOperation(getServicesOperation, genericattributeprofile.SignatureGattDeviceServicesResult); err != nil {
return nil, err
Expand All @@ -64,6 +65,7 @@ func (d Device) DiscoverServices(filterUUIDs []UUID) ([]DeviceService, error) {
}

servicesResult := (*genericattributeprofile.GattDeviceServicesResult)(res)
defer servicesResult.Release()

status, err := servicesResult.GetStatus()
if err != nil {
Expand All @@ -77,6 +79,7 @@ func (d Device) DiscoverServices(filterUUIDs []UUID) ([]DeviceService, error) {
if err != nil {
return nil, err
}
defer servicesVector.Release()

// Convert services vector to array
servicesSize, err := servicesVector.GetSize()
Expand Down Expand Up @@ -197,6 +200,7 @@ func (s DeviceService) DiscoverCharacteristics(filterUUIDs []UUID) ([]DeviceChar
if err != nil {
return nil, err
}
defer getCharacteristicsOp.Release()

// IAsyncOperation<GattCharacteristicsResult>
if err := awaitAsyncOperation(getCharacteristicsOp, genericattributeprofile.SignatureGattCharacteristicsResult); err != nil {
Expand All @@ -209,12 +213,14 @@ func (s DeviceService) DiscoverCharacteristics(filterUUIDs []UUID) ([]DeviceChar
}

gattCharResult := (*genericattributeprofile.GattCharacteristicsResult)(res)
defer gattCharResult.Release()

// IVectorView<GattCharacteristic>
charVector, err := gattCharResult.GetCharacteristics()
if err != nil {
return nil, err
}
defer charVector.Release()

// Convert characteristics vector to array
characteristicsSize, err := charVector.GetSize()
Expand Down Expand Up @@ -361,9 +367,14 @@ func (c DeviceCharacteristic) write(p []byte, mode genericattributeprofile.GattW
if err != nil {
return 0, err
}
defer value.Release()

// IAsyncOperation<GattCommunicationStatus>
asyncOp, err := c.characteristic.WriteValueWithOptionAsync(value, mode)
if err != nil {
return 0, err
}
defer asyncOp.Release()

if err := awaitAsyncOperation(asyncOp, genericattributeprofile.SignatureGattCommunicationStatus); err != nil {
return 0, err
Expand Down Expand Up @@ -395,6 +406,7 @@ func (c DeviceCharacteristic) Read(data []byte) (int, error) {
if err != nil {
return 0, err
}
defer readOp.Release()

// IAsyncOperation<GattReadResult>
if err := awaitAsyncOperation(readOp, genericattributeprofile.SignatureGattReadResult); err != nil {
Expand All @@ -407,16 +419,19 @@ func (c DeviceCharacteristic) Read(data []byte) (int, error) {
}

result := (*genericattributeprofile.GattReadResult)(res)
defer result.Release()

buffer, err := result.GetValue()
if err != nil {
return 0, err
}
defer buffer.Release()

datareader, err := streams.DataReaderFromBuffer(buffer)
if err != nil {
return 0, err
}
defer datareader.Release()

bufferlen, err := buffer.GetLength()
if err != nil {
Expand Down Expand Up @@ -496,6 +511,7 @@ func (c DeviceCharacteristic) EnableNotificationsWithMode(mode NotificationMode,
if err != nil {
return
}
defer buf.Release()

reader, err := streams.DataReaderFromBuffer(buf)
if err != nil {
Expand Down Expand Up @@ -527,6 +543,7 @@ func (c DeviceCharacteristic) EnableNotificationsWithMode(mode NotificationMode,
if err != nil {
return err
}
defer writeOp.Release()

// IAsyncOperation<GattCommunicationStatus>
if err := awaitAsyncOperation(writeOp, genericattributeprofile.SignatureGattCommunicationStatus); err != nil {
Expand Down
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