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//! Return values from function calls.
/// Device creation errors during `open`.
#[derive(Fail, Debug, Clone, PartialEq, Eq)]
pub enum DeviceCreationError {
/// Memory allocation on the host side failed.
/// This could be caused by a lack of memory.
#[fail(display = "Host memory allocation failed.")]
OutOfHostMemory,
/// Memory allocation on the device side failed.
/// This could be caused by a lack of memory.
#[fail(display = "Device memory allocation failed.")]
OutOfDeviceMemory,
/// Device initialization failed due to implementation specific errors.
#[fail(display = "Device initialization failed.")]
InitializationFailed,
/// At least one of the user requested extensions if not supported by the
/// physical device.
#[fail(display = "One or multiple extensions are not supported.")]
MissingExtension,
/// At least one of the user requested features if not supported by the
/// physical device.
///
/// Use [`features`](trait.PhysicalDevice.html#tymethod.features)
/// for checking the supported features.
#[fail(display = "One or multiple features are not supported.")]
MissingFeature,
/// Too many logical devices have been created from this physical device.
///
/// The implementation may only support one logical device for each physical
/// device or lacks resources to allocate a new device.
#[fail(display = "Too many device objects have been created.")]
TooManyObjects,
/// The logical or physical device are lost during the device creation
/// process.
///
/// This may be caused by hardware failure, physical device removal,
/// power outage, etc.
#[fail(display = "Physical or logical device lost.")]
DeviceLost,
}
/// Errors during execution of operations on the host side.
#[derive(Fail, Debug, Clone, PartialEq, Eq)]
pub enum HostExecutionError {
/// Memory allocation on the host side failed.
/// This could be caused by a lack of memory.
#[fail(display = "Host memory allocation failed.")]
OutOfHostMemory,
/// Memory allocation on the device side failed.
/// This could be caused by a lack of memory.
#[fail(display = "Device memory allocation failed.")]
OutOfDeviceMemory,
/// The logical or physical device are lost during the device creation
/// process.
///
/// This may be caused by hardware failure, physical device removal,
/// power outage, etc.
#[fail(display = "Physical or logical device lost.")]
DeviceLost,
}