struct dispatch_block_flags_t {
    init(_ value: UInt)
    var value: UInt
}

struct dispatch_block_flags_t : RawRepresentable {
    init(_ rawValue: UInt)
    init(rawValue rawValue: UInt)
    var rawValue: UInt
}

protocol OS_dispatch_data : OS_dispatch_object {
}

protocol OS_dispatch_data : OS_dispatch_object, NSObjectProtocol {
}

protocol OS_dispatch_group : OS_dispatch_object {
}

protocol OS_dispatch_group : OS_dispatch_object, NSObjectProtocol {
}

protocol OS_dispatch_io : OS_dispatch_object {
}

protocol OS_dispatch_io : OS_dispatch_object, NSObjectProtocol {
}

protocol OS_dispatch_object {
}

protocol OS_dispatch_object : NSObjectProtocol {
}

protocol OS_dispatch_queue : OS_dispatch_object {
}

protocol OS_dispatch_queue : OS_dispatch_object, NSObjectProtocol {
}

protocol OS_dispatch_queue_attr : OS_dispatch_object {
}

protocol OS_dispatch_queue_attr : OS_dispatch_object, NSObjectProtocol {
}

protocol OS_dispatch_semaphore : OS_dispatch_object {
}

protocol OS_dispatch_semaphore : OS_dispatch_object, NSObjectProtocol {
}

protocol OS_dispatch_source : OS_dispatch_object {
}

protocol OS_dispatch_source : OS_dispatch_object, NSObjectProtocol {
}

func dispatch_apply_f(_ iterations: Int, _ queue: dispatch_queue_t!, _ context: UnsafeMutablePointer<Void>, _ work: CFunctionPointer<((UnsafeMutablePointer<Void>, Int) -> Void)>)

func dispatch_apply_f(_ iterations: Int, _ queue: dispatch_queue_t!, _ context: UnsafeMutablePointer<Void>, _ work: (UnsafeMutablePointer<Void>, Int) -> Void)

func dispatch_block_create(_ flags: dispatch_block_flags_t, _ block: dispatch_block_t) -> dispatch_block_t!

@warn_unused_result
func dispatch_block_create(_ flags: dispatch_block_flags_t, _ block: dispatch_block_t) -> dispatch_block_t!

func dispatch_block_create_with_qos_class(_ flags: dispatch_block_flags_t, _ qos_class: dispatch_qos_class_t, _ relative_priority: Int32, _ block: dispatch_block_t) -> dispatch_block_t!

@warn_unused_result
func dispatch_block_create_with_qos_class(_ flags: dispatch_block_flags_t, _ qos_class: dispatch_qos_class_t, _ relative_priority: Int32, _ block: dispatch_block_t) -> dispatch_block_t!

func dispatch_block_testcancel(_ block: dispatch_block_t) -> Int

@warn_unused_result
func dispatch_block_testcancel(_ block: dispatch_block_t) -> Int

func dispatch_data_copy_region(_ data: dispatch_data_t, _ location: Int, _ offset_ptr: UnsafeMutablePointer<Int>) -> dispatch_data_t!

@warn_unused_result
func dispatch_data_copy_region(_ data: dispatch_data_t, _ location: Int, _ offset_ptr: UnsafeMutablePointer<Int>) -> dispatch_data_t!

func dispatch_data_create(_ buffer: UnsafePointer<Void>, _ size: Int, _ queue: dispatch_queue_t!, _ destructor: dispatch_block_t!) -> dispatch_data_t!

@warn_unused_result
func dispatch_data_create(_ buffer: UnsafePointer<Void>, _ size: Int, _ queue: dispatch_queue_t!, _ destructor: dispatch_block_t!) -> dispatch_data_t!

func dispatch_data_create_concat(_ data1: dispatch_data_t, _ data2: dispatch_data_t) -> dispatch_data_t!

@warn_unused_result
func dispatch_data_create_concat(_ data1: dispatch_data_t, _ data2: dispatch_data_t) -> dispatch_data_t!

func dispatch_data_create_map(_ data: dispatch_data_t, _ buffer_ptr: UnsafeMutablePointer<UnsafePointer<Void>>, _ size_ptr: UnsafeMutablePointer<Int>) -> dispatch_data_t!

@warn_unused_result
func dispatch_data_create_map(_ data: dispatch_data_t, _ buffer_ptr: UnsafeMutablePointer<UnsafePointer<Void>>, _ size_ptr: UnsafeMutablePointer<Int>) -> dispatch_data_t!

func dispatch_data_create_subrange(_ data: dispatch_data_t, _ offset: Int, _ length: Int) -> dispatch_data_t!

@warn_unused_result
func dispatch_data_create_subrange(_ data: dispatch_data_t, _ offset: Int, _ length: Int) -> dispatch_data_t!

typealias dispatch_data_t = NSObject

typealias dispatch_data_t = OS_dispatch_data

typealias dispatch_function_t = CFunctionPointer<((UnsafeMutablePointer<Void>) -> Void)>

typealias dispatch_function_t = (UnsafeMutablePointer<Void>) -> Void

func dispatch_get_context(_ object: dispatch_object_t) -> UnsafeMutablePointer<Void>

@warn_unused_result
func dispatch_get_context(_ object: dispatch_object_t) -> UnsafeMutablePointer<Void>

func dispatch_get_global_queue(_ identifier: Int, _ flags: UInt) -> dispatch_queue_t!

@warn_unused_result
func dispatch_get_global_queue(_ identifier: Int, _ flags: UInt) -> dispatch_queue_t!

func dispatch_get_global_queue(_ identifier: qos_class_t, _ flags: UInt) -> dispatch_queue_t

@warn_unused_result
func dispatch_get_global_queue(_ identifier: qos_class_t, _ flags: UInt) -> dispatch_queue_t

func dispatch_get_specific(_ key: UnsafePointer<Void>) -> UnsafeMutablePointer<Void>

@warn_unused_result
func dispatch_get_specific(_ key: UnsafePointer<Void>) -> UnsafeMutablePointer<Void>

func dispatch_group_create() -> dispatch_group_t!

@warn_unused_result
func dispatch_group_create() -> dispatch_group_t!

typealias dispatch_group_t = NSObject

typealias dispatch_group_t = OS_dispatch_group

func dispatch_introspection_hook_queue_callout_begin(_ queue: dispatch_queue_t!, _ context: UnsafeMutablePointer<Void>, _ function: dispatch_function_t)

func dispatch_introspection_hook_queue_callout_begin(_ queue: dispatch_queue_t!, _ context: UnsafeMutablePointer<Void>, _ function: dispatch_function_t!)

func dispatch_introspection_hook_queue_callout_end(_ queue: dispatch_queue_t!, _ context: UnsafeMutablePointer<Void>, _ function: dispatch_function_t)

func dispatch_introspection_hook_queue_callout_end(_ queue: dispatch_queue_t!, _ context: UnsafeMutablePointer<Void>, _ function: dispatch_function_t!)

func dispatch_io_create(_ type: dispatch_io_type_t, _ fd: dispatch_fd_t, _ queue: dispatch_queue_t!, _ cleanup_handler: ((Int32) -> Void)!) -> dispatch_io_t!

@warn_unused_result
func dispatch_io_create(_ type: dispatch_io_type_t, _ fd: dispatch_fd_t, _ queue: dispatch_queue_t!, _ cleanup_handler: ((Int32) -> Void)!) -> dispatch_io_t!

func dispatch_io_create_with_io(_ type: dispatch_io_type_t, _ io: dispatch_io_t, _ queue: dispatch_queue_t!, _ cleanup_handler: ((Int32) -> Void)!) -> dispatch_io_t!

@warn_unused_result
func dispatch_io_create_with_io(_ type: dispatch_io_type_t, _ io: dispatch_io_t, _ queue: dispatch_queue_t!, _ cleanup_handler: ((Int32) -> Void)!) -> dispatch_io_t!

func dispatch_io_create_with_path(_ type: dispatch_io_type_t, _ path: UnsafePointer<Int8>, _ oflag: Int32, _ mode: mode_t, _ queue: dispatch_queue_t!, _ cleanup_handler: ((Int32) -> Void)!) -> dispatch_io_t!

@warn_unused_result
func dispatch_io_create_with_path(_ type: dispatch_io_type_t, _ path: UnsafePointer<Int8>, _ oflag: Int32, _ mode: mode_t, _ queue: dispatch_queue_t!, _ cleanup_handler: ((Int32) -> Void)!) -> dispatch_io_t!

func dispatch_io_get_descriptor(_ channel: dispatch_io_t) -> dispatch_fd_t

@warn_unused_result
func dispatch_io_get_descriptor(_ channel: dispatch_io_t) -> dispatch_fd_t

let DISPATCH_IO_RANDOM: UInt

let DISPATCH_IO_RANDOM: dispatch_io_type_t

let DISPATCH_IO_STOP: UInt

let DISPATCH_IO_STOP: dispatch_io_close_flags_t

let DISPATCH_IO_STREAM: UInt

let DISPATCH_IO_STREAM: dispatch_io_type_t

let DISPATCH_IO_STRICT_INTERVAL: UInt

let DISPATCH_IO_STRICT_INTERVAL: dispatch_io_interval_flags_t

typealias dispatch_io_t = NSObject

typealias dispatch_io_t = OS_dispatch_io

let DISPATCH_MACH_SEND_DEAD: UInt

let DISPATCH_MACH_SEND_DEAD: dispatch_source_mach_send_flags_t

let DISPATCH_MEMORYPRESSURE_CRITICAL: UInt

let DISPATCH_MEMORYPRESSURE_CRITICAL: dispatch_source_memorypressure_flags_t

let DISPATCH_MEMORYPRESSURE_NORMAL: UInt

let DISPATCH_MEMORYPRESSURE_NORMAL: dispatch_source_memorypressure_flags_t

let DISPATCH_MEMORYPRESSURE_WARN: UInt

let DISPATCH_MEMORYPRESSURE_WARN: dispatch_source_memorypressure_flags_t

typealias dispatch_object_t = NSObject

typealias dispatch_object_t = OS_dispatch_object

let DISPATCH_PROC_EXEC: UInt

let DISPATCH_PROC_EXEC: dispatch_source_proc_flags_t

let DISPATCH_PROC_FORK: UInt

let DISPATCH_PROC_FORK: dispatch_source_proc_flags_t

let DISPATCH_PROC_SIGNAL: UInt

let DISPATCH_PROC_SIGNAL: dispatch_source_proc_flags_t

func dispatch_queue_attr_make_with_qos_class(_ attr: dispatch_queue_attr_t!, _ qos_class: dispatch_qos_class_t, _ relative_priority: Int32) -> dispatch_queue_attr_t!

@warn_unused_result
func dispatch_queue_attr_make_with_qos_class(_ attr: dispatch_queue_attr_t!, _ qos_class: dispatch_qos_class_t, _ relative_priority: Int32) -> dispatch_queue_attr_t!

typealias dispatch_queue_attr_t = NSObject

typealias dispatch_queue_attr_t = OS_dispatch_queue_attr

func dispatch_queue_create(_ label: UnsafePointer<Int8>, _ attr: dispatch_queue_attr_t!) -> dispatch_queue_t!

@warn_unused_result
func dispatch_queue_create(_ label: UnsafePointer<Int8>, _ attr: dispatch_queue_attr_t!) -> dispatch_queue_t!

func dispatch_queue_get_label(_ queue: dispatch_queue_t!) -> UnsafePointer<Int8>

@warn_unused_result
func dispatch_queue_get_label(_ queue: dispatch_queue_t!) -> UnsafePointer<Int8>

func dispatch_queue_get_qos_class(_ queue: dispatch_queue_t, _ relative_priority_ptr: UnsafeMutablePointer<Int32>) -> dispatch_qos_class_t

@warn_unused_result
func dispatch_queue_get_qos_class(_ queue: dispatch_queue_t, _ relative_priority_ptr: UnsafeMutablePointer<Int32>) -> dispatch_qos_class_t

func dispatch_queue_get_specific(_ queue: dispatch_queue_t, _ key: UnsafePointer<Void>) -> UnsafeMutablePointer<Void>

@warn_unused_result
func dispatch_queue_get_specific(_ queue: dispatch_queue_t, _ key: UnsafePointer<Void>) -> UnsafeMutablePointer<Void>

let DISPATCH_QUEUE_PRIORITY_BACKGROUND: (Int)

let DISPATCH_QUEUE_PRIORITY_BACKGROUND: dispatch_queue_priority_t

let DISPATCH_QUEUE_PRIORITY_DEFAULT: (Int)

let DISPATCH_QUEUE_PRIORITY_DEFAULT: dispatch_queue_priority_t

let DISPATCH_QUEUE_PRIORITY_HIGH: (Int)

let DISPATCH_QUEUE_PRIORITY_HIGH: dispatch_queue_priority_t

let DISPATCH_QUEUE_PRIORITY_LOW: (Int)

let DISPATCH_QUEUE_PRIORITY_LOW: dispatch_queue_priority_t

func dispatch_queue_set_specific(_ queue: dispatch_queue_t, _ key: UnsafePointer<Void>, _ context: UnsafeMutablePointer<Void>, _ destructor: dispatch_function_t)

func dispatch_queue_set_specific(_ queue: dispatch_queue_t, _ key: UnsafePointer<Void>, _ context: UnsafeMutablePointer<Void>, _ destructor: dispatch_function_t!)

typealias dispatch_queue_t = NSObject

typealias dispatch_queue_t = OS_dispatch_queue

func dispatch_semaphore_create(_ value: Int) -> dispatch_semaphore_t!

@warn_unused_result
func dispatch_semaphore_create(_ value: Int) -> dispatch_semaphore_t!

typealias dispatch_semaphore_t = NSObject

typealias dispatch_semaphore_t = OS_dispatch_semaphore

func dispatch_set_finalizer_f(_ object: dispatch_object_t!, _ finalizer: dispatch_function_t)

func dispatch_set_finalizer_f(_ object: dispatch_object_t!, _ finalizer: dispatch_function_t!)

func dispatch_source_create(_ type: dispatch_source_type_t, _ handle: UInt, _ mask: UInt, _ queue: dispatch_queue_t!) -> dispatch_source_t!

@warn_unused_result
func dispatch_source_create(_ type: dispatch_source_type_t, _ handle: UInt, _ mask: UInt, _ queue: dispatch_queue_t!) -> dispatch_source_t!

func dispatch_source_get_data(_ source: dispatch_source_t) -> UInt

@warn_unused_result
func dispatch_source_get_data(_ source: dispatch_source_t) -> UInt

func dispatch_source_get_handle(_ source: dispatch_source_t) -> UInt

@warn_unused_result
func dispatch_source_get_handle(_ source: dispatch_source_t) -> UInt

func dispatch_source_get_mask(_ source: dispatch_source_t) -> UInt

@warn_unused_result
func dispatch_source_get_mask(_ source: dispatch_source_t) -> UInt

func dispatch_source_set_cancel_handler_f(_ source: dispatch_source_t, _ handler: dispatch_function_t)

func dispatch_source_set_cancel_handler_f(_ source: dispatch_source_t, _ handler: dispatch_function_t!)

func dispatch_source_set_event_handler_f(_ source: dispatch_source_t, _ handler: dispatch_function_t)

func dispatch_source_set_event_handler_f(_ source: dispatch_source_t, _ handler: dispatch_function_t!)

func dispatch_source_set_registration_handler_f(_ source: dispatch_source_t, _ handler: dispatch_function_t)

func dispatch_source_set_registration_handler_f(_ source: dispatch_source_t, _ handler: dispatch_function_t!)

typealias dispatch_source_t = NSObject

typealias dispatch_source_t = OS_dispatch_source

func dispatch_source_testcancel(_ source: dispatch_source_t) -> Int

@warn_unused_result
func dispatch_source_testcancel(_ source: dispatch_source_t) -> Int

func dispatch_time(_ when: dispatch_time_t, _ delta: Int64) -> dispatch_time_t

@warn_unused_result
func dispatch_time(_ when: dispatch_time_t, _ delta: Int64) -> dispatch_time_t

let DISPATCH_TIMER_STRICT: UInt

let DISPATCH_TIMER_STRICT: dispatch_source_timer_flags_t

let DISPATCH_VNODE_ATTRIB: UInt

let DISPATCH_VNODE_ATTRIB: dispatch_source_vnode_flags_t

let DISPATCH_VNODE_DELETE: UInt

let DISPATCH_VNODE_DELETE: dispatch_source_vnode_flags_t

let DISPATCH_VNODE_EXTEND: UInt

let DISPATCH_VNODE_EXTEND: dispatch_source_vnode_flags_t

let DISPATCH_VNODE_LINK: UInt

let DISPATCH_VNODE_LINK: dispatch_source_vnode_flags_t

let DISPATCH_VNODE_RENAME: UInt

let DISPATCH_VNODE_RENAME: dispatch_source_vnode_flags_t

let DISPATCH_VNODE_REVOKE: UInt

let DISPATCH_VNODE_REVOKE: dispatch_source_vnode_flags_t

let DISPATCH_VNODE_WRITE: UInt

let DISPATCH_VNODE_WRITE: dispatch_source_vnode_flags_t

func dispatch_walltime(_ when: UnsafePointer<timespec>, _ delta: Int64) -> dispatch_time_t

@warn_unused_result
func dispatch_walltime(_ when: UnsafePointer<timespec>, _ delta: Int64) -> dispatch_time_t