//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2016 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See http://swift.org/LICENSE.txt for license information
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//

@_exported import Dispatch

/// The type of blocks submitted to dispatch queues, which take no arguments
/// and have no return value.
///
/// The dispatch_block_t typealias is different from usual closures in that it
/// uses @convention(block). This is to avoid unnecessary bridging between
/// C blocks and Swift closures, which interferes with Grand Central Dispatch
/// APIs that depend on the referential identity of a block.
public typealias dispatch_block_t = @convention(block) () -> Void

//===----------------------------------------------------------------------===//
// Macros
// FIXME: rdar://16851050 update API so these import better
//===----------------------------------------------------------------------===//

// dispatch/io.h
public var DISPATCH_IO_STREAM: dispatch_io_type_t {
  return 0
}
public var DISPATCH_IO_RANDOM: dispatch_io_type_t {
  return 1
}

public var DISPATCH_IO_STOP: dispatch_io_close_flags_t {
  return 1
}
public var DISPATCH_IO_STRICT_INTERVAL: dispatch_io_interval_flags_t {
  return 1
}

// dispatch/queue.h
public var DISPATCH_QUEUE_SERIAL: dispatch_queue_attr_t! {
  return nil
}
public var DISPATCH_CURRENT_QUEUE_LABEL: dispatch_queue_t! {
  return nil
}
public var DISPATCH_TARGET_QUEUE_DEFAULT: dispatch_queue_t! {
  return nil
}
public var DISPATCH_QUEUE_PRIORITY_HIGH: dispatch_queue_priority_t {
  return 2
}
public var DISPATCH_QUEUE_PRIORITY_DEFAULT: dispatch_queue_priority_t {
  return 0
}
public var DISPATCH_QUEUE_PRIORITY_LOW: dispatch_queue_priority_t {
  return -2
}
public var DISPATCH_QUEUE_PRIORITY_BACKGROUND: dispatch_queue_priority_t {
  return -32768
}

@warn_unused_result
public func dispatch_get_global_queue(identifier: qos_class_t,
                                      _ flags: UInt) -> dispatch_queue_t {
  return dispatch_get_global_queue(Int(identifier.rawValue), flags)
}

public var DISPATCH_QUEUE_CONCURRENT: dispatch_queue_attr_t {
  return _swift_dispatch_queue_concurrent()
}

@warn_unused_result
@_silgen_name("_swift_dispatch_queue_concurrent")
internal func _swift_dispatch_queue_concurrent() -> dispatch_queue_attr_t

// dispatch/data.h
public var dispatch_data_empty: dispatch_data_t {
  return _swift_dispatch_data_empty()
}

@warn_unused_result
@_silgen_name("_swift_dispatch_data_empty")
internal func _swift_dispatch_data_empty() -> dispatch_data_t

// dispatch/source.h
// FIXME: DISPATCH_SOURCE_TYPE_*
public var DISPATCH_MACH_SEND_DEAD: dispatch_source_mach_send_flags_t {
  return 1
}
public var DISPATCH_MEMORYPRESSURE_NORMAL: dispatch_source_memorypressure_flags_t {
  return 1
}
public var DISPATCH_MEMORYPRESSURE_WARN: dispatch_source_memorypressure_flags_t {
  return 2
}
public var DISPATCH_MEMORYPRESSURE_CRITICAL: dispatch_source_memorypressure_flags_t {
  return 4
}
public var DISPATCH_PROC_EXIT: dispatch_source_proc_flags_t {
  return 0x80000000
}
public var DISPATCH_PROC_FORK: dispatch_source_proc_flags_t { return 0x40000000 }
public var DISPATCH_PROC_EXEC: dispatch_source_proc_flags_t { return 0x20000000 }
public var DISPATCH_PROC_SIGNAL: dispatch_source_proc_flags_t { return 0x08000000 }
public var DISPATCH_VNODE_DELETE: dispatch_source_vnode_flags_t { return 0x1 }
public var DISPATCH_VNODE_WRITE:  dispatch_source_vnode_flags_t { return 0x2 }
public var DISPATCH_VNODE_EXTEND: dispatch_source_vnode_flags_t { return 0x4 }
public var DISPATCH_VNODE_ATTRIB: dispatch_source_vnode_flags_t { return 0x8 }
public var DISPATCH_VNODE_LINK:   dispatch_source_vnode_flags_t { return 0x10 }
public var DISPATCH_VNODE_RENAME: dispatch_source_vnode_flags_t { return 0x20 }
public var DISPATCH_VNODE_REVOKE: dispatch_source_vnode_flags_t { return 0x40 }
public var DISPATCH_TIMER_STRICT: dispatch_source_timer_flags_t { return 1 }

public var DISPATCH_SOURCE_TYPE_DATA_ADD: dispatch_source_type_t {
  return _swift_dispatch_source_type_data_add()
}
public var DISPATCH_SOURCE_TYPE_DATA_OR: dispatch_source_type_t {
  return _swift_dispatch_source_type_data_or()
}
public var DISPATCH_SOURCE_TYPE_MACH_SEND: dispatch_source_type_t {
  return _swift_dispatch_source_type_mach_send()
}
public var DISPATCH_SOURCE_TYPE_MACH_RECV: dispatch_source_type_t {
  return _swift_dispatch_source_type_mach_recv()
}
public var DISPATCH_SOURCE_TYPE_MEMORYPRESSURE: dispatch_source_type_t {
  return _swift_dispatch_source_type_memorypressure()
}
public var DISPATCH_SOURCE_TYPE_READ: dispatch_source_type_t {
  return _swift_dispatch_source_type_read()
}
public var DISPATCH_SOURCE_TYPE_PROC: dispatch_source_type_t {
  return _swift_dispatch_source_type_proc()
}
public var DISPATCH_SOURCE_TYPE_SIGNAL: dispatch_source_type_t {
  return _swift_dispatch_source_type_signal()
}
public var DISPATCH_SOURCE_TYPE_TIMER: dispatch_source_type_t {
  return _swift_dispatch_source_type_timer()
}
public var DISPATCH_SOURCE_TYPE_VNODE: dispatch_source_type_t {
  return _swift_dispatch_source_type_vnode()
}
public var DISPATCH_SOURCE_TYPE_WRITE: dispatch_source_type_t {
  return _swift_dispatch_source_type_write()
}

@warn_unused_result
@_silgen_name("_swift_dispatch_source_type_DATA_ADD")
internal func _swift_dispatch_source_type_data_add() -> dispatch_source_type_t

@warn_unused_result
@_silgen_name("_swift_dispatch_source_type_DATA_OR")
internal func _swift_dispatch_source_type_data_or() -> dispatch_source_type_t

@warn_unused_result
@_silgen_name("_swift_dispatch_source_type_MACH_SEND")
internal func _swift_dispatch_source_type_mach_send() -> dispatch_source_type_t

@warn_unused_result
@_silgen_name("_swift_dispatch_source_type_MACH_RECV")
internal func _swift_dispatch_source_type_mach_recv() -> dispatch_source_type_t

@warn_unused_result
@_silgen_name("_swift_dispatch_source_type_MEMORYPRESSURE")
internal func _swift_dispatch_source_type_memorypressure()
  -> dispatch_source_type_t

@warn_unused_result
@_silgen_name("_swift_dispatch_source_type_PROC")
internal func _swift_dispatch_source_type_proc() -> dispatch_source_type_t

@warn_unused_result
@_silgen_name("_swift_dispatch_source_type_READ")
internal func _swift_dispatch_source_type_read() -> dispatch_source_type_t

@warn_unused_result
@_silgen_name("_swift_dispatch_source_type_SIGNAL")
internal func _swift_dispatch_source_type_signal() -> dispatch_source_type_t

@warn_unused_result
@_silgen_name("_swift_dispatch_source_type_TIMER")
internal func _swift_dispatch_source_type_timer() -> dispatch_source_type_t

@warn_unused_result
@_silgen_name("_swift_dispatch_source_type_VNODE")
internal func _swift_dispatch_source_type_vnode() -> dispatch_source_type_t

@warn_unused_result
@_silgen_name("_swift_dispatch_source_type_WRITE")
internal func _swift_dispatch_source_type_write() -> dispatch_source_type_t

// dispatch/time.h
// DISPATCH_TIME_NOW: ok
// DISPATCH_TIME_FOREVER: ok