# VkSemaphoreType(3) Manual Page

## Name

VkSemaphoreType - Sepcifies the type of a semaphore object

## C Specification

Possible values of VkSemaphoreTypeCreateInfo::`semaphoreType`, specifying the type of a semaphore, are:

    typedef enum VkSemaphoreType {
        VK_SEMAPHORE_TYPE_BINARY = 0,
        VK_SEMAPHORE_TYPE_TIMELINE = 1,
        VK_SEMAPHORE_TYPE_BINARY_KHR = VK_SEMAPHORE_TYPE_BINARY,
        VK_SEMAPHORE_TYPE_TIMELINE_KHR = VK_SEMAPHORE_TYPE_TIMELINE,
        VK_SEMAPHORE_TYPE_MAX_ENUM = 0x7FFFFFFF
    } VkSemaphoreType;

or the equivalent

    typedef VkSemaphoreType VkSemaphoreTypeKHR;

## Description

- `VK_SEMAPHORE_TYPE_BINARY` specifies a binary semaphore type that has a boolean payload indicating whether the semaphore is currently signaled or unsignaled. When created, the semaphore is in the unsignaled state.

- `VK_SEMAPHORE_TYPE_TIMELINE` specifies a timeline semaphore type that has a monotonically increasing 64-bit unsigned integer payload indicating whether the semaphore is signaled with respect to a particular reference value. When created, the semaphore payload has the value given by the `initialValue` field of `VkSemaphoreTypeCreateInfo`.

## See Also

VkSemaphoreTypeCreateInfo

## 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 (c) 2014-2020 Khronos Group. This work is licensed under a Creative Commons Attribution 4.0 International License.