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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <dispatch/dispatch.h>
#include "base/base_export.h"
#include "base/mac/scoped_dispatch_object.h"
#include "base/macros.h"
#include "starboard/types.h"
namespace base {
// This class encapsulates a MACH_RECV dispatch source. When this object is
// destroyed, the source will be cancelled and it will wait for the source
// to stop executing work. The source can run on either a user-supplied queue,
// or it can create its own for the source.
class BASE_EXPORT DispatchSourceMach {
// Creates a new dispatch source for the |port| and schedules it on a new
// queue that will be created with |name|. When a Mach message is received,
// the |event_handler| will be called.
DispatchSourceMach(const char* name,
mach_port_t port,
void (^event_handler)());
// Creates a new dispatch source with the same semantics as above, but rather
// than creating a new queue, it schedules the source on |queue|.
DispatchSourceMach(dispatch_queue_t queue,
mach_port_t port,
void (^event_handler)());
// Cancels the source and waits for it to become fully cancelled before
// releasing the source.
// Resumes the source. This must be called before any Mach messages will
// be received.
void Resume();
// The dispatch queue used to service the source_.
ScopedDispatchObject<dispatch_queue_t> queue_;
// A MACH_RECV dispatch source.
ScopedDispatchObject<dispatch_source_t> source_;
// Semaphore used to wait on the |source_|'s cancellation in the destructor.
ScopedDispatchObject<dispatch_semaphore_t> source_canceled_;
} // namespace base