C Specification
To invalidate ranges of non-coherent memory from the host caches, call:
// Provided by VK_VERSION_1_0
VkResult vkInvalidateMappedMemoryRanges(
VkDevice device,
uint32_t memoryRangeCount,
const VkMappedMemoryRange* pMemoryRanges);
Parameters
-
device
is the logical device that owns the memory ranges. -
memoryRangeCount
is the length of thepMemoryRanges
array. -
pMemoryRanges
is a pointer to an array of VkMappedMemoryRange structures describing the memory ranges to invalidate.
Description
vkInvalidateMappedMemoryRanges
guarantees that device writes to the
memory ranges described by pMemoryRanges
, which have been made
available to the host memory domain using the VK_ACCESS_HOST_WRITE_BIT
and VK_ACCESS_HOST_READ_BIT
access
types, are made visible to the host.
If a range of non-coherent memory is written by the host and then
invalidated without first being flushed, its contents are undefined.
Within each range described by pMemoryRanges
, each set of
nonCoherentAtomSize
bytes in that range is invalidated if any byte in
that set has been written by the device since it was first host mapped, or
the last time it was invalidated.
Note
Mapping non-coherent memory does not implicitly invalidate that memory. |
If
VkPhysicalDeviceVulkanSC10Properties::deviceNoDynamicHostAllocations
is VK_TRUE
, vkInvalidateMappedMemoryRanges
must not return
VK_ERROR_OUT_OF_HOST_MEMORY
.
Document Notes
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.