| use std::convert::TryInto; |
| |
| use crate::vk; |
| pub type VkResult<T> = Result<T, vk::Result>; |
| |
| impl From<vk::Result> for VkResult<()> { |
| fn from(err_code: vk::Result) -> Self { |
| err_code.result() |
| } |
| } |
| |
| impl vk::Result { |
| pub fn result(self) -> VkResult<()> { |
| self.result_with_success(()) |
| } |
| |
| pub fn result_with_success<T>(self, v: T) -> VkResult<T> { |
| match self { |
| vk::Result::SUCCESS => Ok(v), |
| _ => Err(self), |
| } |
| } |
| } |
| |
| /// Repeatedly calls `f` until it does not return [`vk::Result::INCOMPLETE`] anymore, |
| /// ensuring all available data has been read into the vector. |
| /// |
| /// See for example [`vkEnumerateInstanceExtensionProperties`]: the number of available |
| /// items may change between calls; [`vk::Result::INCOMPLETE`] is returned when the count |
| /// increased (and the vector is not large enough after querying the initial size), |
| /// requiring Ash to try again. |
| /// |
| /// [`vkEnumerateInstanceExtensionProperties`]: https://www.khronos.org/registry/vulkan/specs/1.2-extensions/man/html/vkEnumerateInstanceExtensionProperties.html |
| pub(crate) unsafe fn read_into_uninitialized_vector<N: Copy + Default + TryInto<usize>, T>( |
| f: impl Fn(&mut N, *mut T) -> vk::Result, |
| ) -> VkResult<Vec<T>> |
| where |
| <N as TryInto<usize>>::Error: std::fmt::Debug, |
| { |
| loop { |
| let mut count = N::default(); |
| f(&mut count, std::ptr::null_mut()).result()?; |
| let mut data = |
| Vec::with_capacity(count.try_into().expect("`N` failed to convert to `usize`")); |
| |
| let err_code = f(&mut count, data.as_mut_ptr()); |
| if err_code != vk::Result::INCOMPLETE { |
| data.set_len(count.try_into().expect("`N` failed to convert to `usize`")); |
| break err_code.result_with_success(data); |
| } |
| } |
| } |
| |
| /// Repeatedly calls `f` until it does not return [`vk::Result::INCOMPLETE`] anymore, |
| /// ensuring all available data has been read into the vector. |
| /// |
| /// Items in the target vector are [`default()`][`Default::default()`]-initialized which |
| /// is required for [`vk::BaseOutStructure`]-like structs where [`vk::BaseOutStructure::s_type`] |
| /// needs to be a valid type and [`vk::BaseOutStructure::p_next`] a valid or |
| /// [`null`][`std::ptr::null_mut()`] pointer. |
| /// |
| /// See for example [`vkEnumerateInstanceExtensionProperties`]: the number of available |
| /// items may change between calls; [`vk::Result::INCOMPLETE`] is returned when the count |
| /// increased (and the vector is not large enough after querying the initial size), |
| /// requiring Ash to try again. |
| /// |
| /// [`vkEnumerateInstanceExtensionProperties`]: https://www.khronos.org/registry/vulkan/specs/1.2-extensions/man/html/vkEnumerateInstanceExtensionProperties.html |
| pub(crate) unsafe fn read_into_defaulted_vector< |
| N: Copy + Default + TryInto<usize>, |
| T: Default + Clone, |
| >( |
| f: impl Fn(&mut N, *mut T) -> vk::Result, |
| ) -> VkResult<Vec<T>> |
| where |
| <N as TryInto<usize>>::Error: std::fmt::Debug, |
| { |
| loop { |
| let mut count = N::default(); |
| f(&mut count, std::ptr::null_mut()).result()?; |
| let mut data = |
| vec![Default::default(); count.try_into().expect("`N` failed to convert to `usize`")]; |
| |
| let err_code = f(&mut count, data.as_mut_ptr()); |
| if err_code != vk::Result::INCOMPLETE { |
| data.set_len(count.try_into().expect("`N` failed to convert to `usize`")); |
| break err_code.result_with_success(data); |
| } |
| } |
| } |