C Specification

The VkBufferMemoryBarrier2 structure is defined as:

// Provided by VK_VERSION_1_3
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;
// Provided by VK_KHR_synchronization2
// Equivalent to VkBufferMemoryBarrier2
typedef VkBufferMemoryBarrier2 VkBufferMemoryBarrier2KHR;

Members

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 if VkDependencyInfoKHR::dependencyFlags did not include VK_DEPENDENCY_QUEUE_FAMILY_OWNERSHIP_TRANSFER_USE_ALL_STAGES_BIT_KHR, 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 if VkDependencyInfoKHR::dependencyFlags did not include VK_DEPENDENCY_QUEUE_FAMILY_OWNERSHIP_TRANSFER_USE_ALL_STAGES_BIT_KHR, 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/vulkan/specs/latest/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.

Valid Usage

  • VUID-VkBufferMemoryBarrier2-offset-01187
    offset must be less than the size of buffer

  • VUID-VkBufferMemoryBarrier2-size-01188
    If size is not equal to VK_WHOLE_SIZE, size must be greater than 0

  • VUID-VkBufferMemoryBarrier2-size-01189
    If size is not equal to VK_WHOLE_SIZE, size must be less than or equal to than the size of buffer minus offset

  • VUID-VkBufferMemoryBarrier2-buffer-01931
    If buffer is non-sparse then it must be bound completely and contiguously to a single VkDeviceMemory object

  • VUID-VkBufferMemoryBarrier2-buffer-09095
    If buffer was created with a sharing mode of VK_SHARING_MODE_EXCLUSIVE, and srcQueueFamilyIndex and dstQueueFamilyIndex are not equal, srcQueueFamilyIndex must be VK_QUEUE_FAMILY_EXTERNAL, VK_QUEUE_FAMILY_FOREIGN_EXT, or a valid queue family

  • VUID-VkBufferMemoryBarrier2-buffer-09096
    If buffer was created with a sharing mode of VK_SHARING_MODE_EXCLUSIVE, and srcQueueFamilyIndex and dstQueueFamilyIndex are not equal, dstQueueFamilyIndex must be VK_QUEUE_FAMILY_EXTERNAL, VK_QUEUE_FAMILY_FOREIGN_EXT, or a valid queue family

Valid Usage (Implicit)

  • VUID-VkBufferMemoryBarrier2-sType-sType
    sType must be VK_STRUCTURE_TYPE_BUFFER_MEMORY_BARRIER_2

  • VUID-VkBufferMemoryBarrier2-pNext-pNext
    Each pNext member of any structure (including this one) in the pNext chain must be either NULL or a pointer to a valid instance of VkExternalMemoryAcquireUnmodifiedEXT or VkMemoryBarrierAccessFlags3KHR

  • VUID-VkBufferMemoryBarrier2-sType-unique
    The sType value of each structure in the pNext chain must be unique

  • VUID-VkBufferMemoryBarrier2-srcStageMask-parameter
    srcStageMask must be a valid combination of VkPipelineStageFlagBits2 values

  • VUID-VkBufferMemoryBarrier2-srcAccessMask-parameter
    srcAccessMask must be a valid combination of VkAccessFlagBits2 values

  • VUID-VkBufferMemoryBarrier2-dstStageMask-parameter
    dstStageMask must be a valid combination of VkPipelineStageFlagBits2 values

  • VUID-VkBufferMemoryBarrier2-dstAccessMask-parameter
    dstAccessMask must be a valid combination of VkAccessFlagBits2 values

  • VUID-VkBufferMemoryBarrier2-buffer-parameter
    buffer must be a valid VkBuffer handle

See Also

VK_KHR_synchronization2, VK_VERSION_1_3, VkAccessFlags2, VkBuffer, VkDependencyInfo, VkDeviceSize, VkPipelineStageFlags2, VkStructureType

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.

Copyright

Copyright 2014-2026 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0