The type of
typedef void* (VKAPI_PTR *PFN_vkAllocationFunction)( void* pUserData, size_t size, size_t alignment, VkSystemAllocationScope allocationScope);
pUserDatais the value specified for VkAllocationCallbacks::
pUserDatain the allocator specified by the application.
sizeis the size in bytes of the requested allocation.
alignmentis the requested alignment of the allocation in bytes and must be a power of two.
pfnAllocation is unable to allocate the requested memory, it must
If the allocation was successful, it must return a valid pointer to memory
allocation containing at least
size bytes, and with the pointer value
being a multiple of
Correct Vulkan operation cannot be assumed if the application does not follow these rules.
NULL, and if the implementation is unable
to continue correct processing of the current command without the requested
allocation, it must treat this as a run-time error, and generate
VK_ERROR_OUT_OF_HOST_MEMORY at the appropriate time for the command in
which the condition was detected, as described in Return Codes.
If the implementation is able to continue correct processing of the current
command without the requested allocation, then it may do so, and must not
VK_ERROR_OUT_OF_HOST_MEMORY as a result of this failed
For more information, see the Vulkan Specification
This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.
Copyright (c) 2014-2019 Khronos Group. This work is licensed under a Creative Commons Attribution 4.0 International License.