VkImportSemaphoreFdInfoKHR

The VkImportSemaphoreFdInfoKHR structure is defined as:

typedef struct VkImportSemaphoreFdInfoKHR {
    VkStructureType sType;
    const void* pNext;
    VkSemaphore semaphore;
    VkSemaphoreImportFlags flags;
    VkExternalSemaphoreHandleTypeFlagBits handleType;
    int fd;
} VkImportSemaphoreFdInfoKHR;

• sType is a VkStructureType value identifying this structure.
• pNext is NULL or a pointer to a structure extending this structure.
• semaphore is the semaphore into which the payload will be imported.
• flags is a bitmask of VkSemaphoreImportFlagBits specifying additional parameters for the semaphore payload import operation.
• handleType is a VkExternalSemaphoreHandleTypeFlagBits value specifying the type of fd.
• fd is the external handle to import.

The handle types supported by handleType are:

If handleType is VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_SYNC_FD_BIT, the special value -1 for fd is treated like a valid sync file descriptor referring to an object that has already signaled. The import operation will succeed and the VkSemaphore will have a temporarily imported payload as if a valid file descriptor had been provided.