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68 lines
2.0 KiB
C++
68 lines
2.0 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef BASE_MAC_SCOPED_MACH_PORT_H_
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#define BASE_MAC_SCOPED_MACH_PORT_H_
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#include <mach/mach.h>
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#include "base/base_export.h"
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#include "base/scoped_generic.h"
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namespace base {
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namespace mac {
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namespace internal {
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struct BASE_EXPORT SendRightTraits {
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static mach_port_t InvalidValue() {
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return MACH_PORT_NULL;
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}
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BASE_EXPORT static void Free(mach_port_t port);
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};
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struct BASE_EXPORT ReceiveRightTraits {
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static mach_port_t InvalidValue() {
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return MACH_PORT_NULL;
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}
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BASE_EXPORT static void Free(mach_port_t port);
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};
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struct PortSetTraits {
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static mach_port_t InvalidValue() {
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return MACH_PORT_NULL;
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}
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BASE_EXPORT static void Free(mach_port_t port);
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};
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} // namespace internal
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// A scoper for handling a Mach port that names a send right. Send rights are
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// reference counted, and this takes ownership of the right on construction
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// and then removes a reference to the right on destruction. If the reference
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// is the last one on the right, the right is deallocated.
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using ScopedMachSendRight =
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ScopedGeneric<mach_port_t, internal::SendRightTraits>;
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// A scoper for handling a Mach port's receive right. There is only one
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// receive right per port. This takes ownership of the receive right on
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// construction and then destroys the right on destruction, turning all
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// outstanding send rights into dead names.
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using ScopedMachReceiveRight =
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ScopedGeneric<mach_port_t, internal::ReceiveRightTraits>;
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// A scoper for handling a Mach port set. A port set can have only one
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// reference. This takes ownership of that single reference on construction and
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// destroys the port set on destruction. Destroying a port set does not destroy
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// the receive rights that are members of the port set.
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using ScopedMachPortSet = ScopedGeneric<mach_port_t, internal::PortSetTraits>;
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} // namespace mac
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} // namespace base
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#endif // BASE_MAC_SCOPED_MACH_PORT_H_
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