C Specification
The VkBufferMemoryBarrier2 structure is defined as:
typedef struct VkBufferMemoryBarrier2 {
VkStructureType sType;
const void* pNext;
VkPipelineStageFlags2 srcStageMask;
VkAccessFlags2 srcAccessMask;
VkPipelineStageFlags2 dstStageMask;
VkAccessFlags2 dstAccessMask;
uint32_t srcQueueFamilyIndex;
uint32_t dstQueueFamilyIndex;
VkBuffer buffer;
VkDeviceSize offset;
VkDeviceSize size;
} VkBufferMemoryBarrier2;or the equivalent
// Provided by VK_KHR_synchronization2
typedef VkBufferMemoryBarrier2 VkBufferMemoryBarrier2KHR;Members
-
sTypeis a VkStructureType value identifying this structure. -
pNextisNULLor a pointer to a structure extending this structure. -
srcStageMaskis a VkPipelineStageFlags2 mask of pipeline stages to be included in the first synchronization scope. -
srcAccessMaskis a VkAccessFlags2 mask of access flags to be included in the first access scope. -
dstStageMaskis a VkPipelineStageFlags2 mask of pipeline stages to be included in the second synchronization scope. -
dstAccessMaskis a VkAccessFlags2 mask of access flags to be included in the second access scope. -
srcQueueFamilyIndexis the source queue family for a queue family ownership transfer. -
dstQueueFamilyIndexis the destination queue family for a queue family ownership transfer. -
bufferis a handle to the buffer whose backing memory is affected by the barrier. -
offsetis an offset in bytes into the backing memory forbuffer; this is relative to the base offset as bound to the buffer (see vkBindBufferMemory). -
sizeis a size in bytes of the affected area of backing memory forbuffer, orVK_WHOLE_SIZEto use the range fromoffsetto the end of the buffer.
Description
This structure defines a memory dependency limited to a range of a buffer, and can define a queue family ownership transfer operation for that range.
The first synchronization scope and access scope described by this structure include only operations and memory accesses specified by the source stage mask and the source access mask.
The second synchronization scope and access scope described by this structure include only operations and memory accesses specified by the destination stage mask and the destination access mask.
Both access scopes are
limited to only memory accesses to buffer in the range defined by
offset and size.
If buffer was created with VK_SHARING_MODE_EXCLUSIVE, and
srcQueueFamilyIndex is not equal to dstQueueFamilyIndex, this
memory barrier defines a queue family
ownership transfer operation.
When executed on a queue in the family identified by
srcQueueFamilyIndex, this barrier defines a
queue family release operation
for the specified buffer range, and
the second synchronization scope does not apply to this operation.
When executed on a queue in the family identified by
dstQueueFamilyIndex, this barrier defines a
queue family acquire operation
for the specified buffer range, and
the first synchronization scope does not apply to this operation.
A queue family ownership transfer
operation is also defined if the values are not equal, and either is one
of the special queue family values reserved for external memory ownership
transfers, as described in https://registry.khronos.org/vulkansc/specs/1.0-extensions/html/vkspec.html#synchronization-queue-transfers.
A queue family release
operation is defined when dstQueueFamilyIndex is one of those
values, and a queue family
acquire operation is defined when srcQueueFamilyIndex is one of
those values.
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.