C Specification

To allocate command buffers, call:

// Provided by VK_VERSION_1_0
VkResult vkAllocateCommandBuffers(
    VkDevice                                    device,
    const VkCommandBufferAllocateInfo*          pAllocateInfo,
    VkCommandBuffer*                            pCommandBuffers);


  • device is the logical device that owns the command pool.

  • pAllocateInfo is a pointer to a VkCommandBufferAllocateInfo structure describing parameters of the allocation.

  • pCommandBuffers is a pointer to an array of VkCommandBuffer handles in which the resulting command buffer objects are returned. The array must be at least the length specified by the commandBufferCount member of pAllocateInfo. Each allocated command buffer begins in the initial state.


vkAllocateCommandBuffers can be used to allocate multiple command buffers. If the allocation of any of those command buffers fails, the implementation must free all successfully allocated command buffer objects from this command, set all entries of the pCommandBuffers array to NULL and return the error.


Filling pCommandBuffers with NULL values on failure is an exception to the default error behavior that output parameters will have undefined contents.

When command buffers are first allocated, they are in the initial state.

Valid Usage (Implicit)
  • VUID-vkAllocateCommandBuffers-device-parameter
    device must be a valid VkDevice handle

  • VUID-vkAllocateCommandBuffers-pAllocateInfo-parameter
    pAllocateInfo must be a valid pointer to a valid VkCommandBufferAllocateInfo structure

  • VUID-vkAllocateCommandBuffers-pCommandBuffers-parameter
    pCommandBuffers must be a valid pointer to an array of pAllocateInfo->commandBufferCount VkCommandBuffer handles

  • VUID-vkAllocateCommandBuffers-pAllocateInfo::commandBufferCount-arraylength
    pAllocateInfo->commandBufferCount must be greater than 0

Host Synchronization
  • Host access to pAllocateInfo->commandPool must be externally synchronized

Return Codes
On success, this command returns

On failure, this command returns


See Also

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 2014-2024 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0