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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef BASE_MAC_SCOPED_MACH_PORT_H_ | |
| 6 #define BASE_MAC_SCOPED_MACH_PORT_H_ | |
| 7 | |
| 8 #include <mach/mach.h> | |
| 9 | |
| 10 #include "base/base_export.h" | |
| 11 #include "base/scoped_generic.h" | |
| 12 | |
| 13 namespace base { | |
| 14 namespace mac { | |
| 15 | |
| 16 namespace internal { | |
| 17 | |
| 18 struct BASE_EXPORT SendRightTraits { | |
| 19 static mach_port_t InvalidValue() { | |
| 20 return MACH_PORT_NULL; | |
| 21 } | |
| 22 | |
| 23 BASE_EXPORT static void Free(mach_port_t port); | |
| 24 }; | |
| 25 | |
| 26 struct BASE_EXPORT ReceiveRightTraits { | |
| 27 static mach_port_t InvalidValue() { | |
| 28 return MACH_PORT_NULL; | |
| 29 } | |
| 30 | |
| 31 BASE_EXPORT static void Free(mach_port_t port); | |
| 32 }; | |
| 33 | |
| 34 struct PortSetTraits { | |
| 35 static mach_port_t InvalidValue() { | |
| 36 return MACH_PORT_NULL; | |
| 37 } | |
| 38 | |
| 39 BASE_EXPORT static void Free(mach_port_t port); | |
| 40 }; | |
| 41 | |
| 42 } // namespace internal | |
| 43 | |
| 44 // A scoper for handling a Mach port that names a send right. Send rights are | |
| 45 // reference counted, and this takes ownership of the right on construction | |
| 46 // and then removes a reference to the right on destruction. If the reference | |
| 47 // is the last one on the right, the right is deallocated. | |
| 48 class BASE_EXPORT ScopedMachSendRight : | |
| 49 public base::ScopedGeneric<mach_port_t, internal::SendRightTraits> { | |
| 50 public: | |
| 51 explicit ScopedMachSendRight(mach_port_t port = traits_type::InvalidValue()) | |
| 52 : ScopedGeneric(port) {} | |
| 53 | |
| 54 operator mach_port_t() const { return get(); } | |
| 55 }; | |
| 56 | |
| 57 // A scoper for handling a Mach port's receive right. There is only one | |
| 58 // receive right per port. This takes ownership of the receive right on | |
| 59 // construction and then destroys the right on destruction, turning all | |
| 60 // outstanding send rights into dead names. | |
| 61 class BASE_EXPORT ScopedMachReceiveRight : | |
| 62 public base::ScopedGeneric<mach_port_t, internal::ReceiveRightTraits> { | |
| 63 public: | |
| 64 explicit ScopedMachReceiveRight( | |
| 65 mach_port_t port = traits_type::InvalidValue()) : ScopedGeneric(port) {} | |
| 66 | |
| 67 operator mach_port_t() const { return get(); } | |
| 68 }; | |
| 69 | |
| 70 // A scoper for handling a Mach port set. A port set can have only one | |
| 71 // reference. This takes ownership of that single reference on construction and | |
| 72 // destroys the port set on destruction. Destroying a port set does not destroy | |
| 73 // the receive rights that are members of the port set. | |
| 74 class BASE_EXPORT ScopedMachPortSet : | |
| 75 public ScopedGeneric<mach_port_t, internal::PortSetTraits> { | |
| 76 public: | |
| 77 explicit ScopedMachPortSet(mach_port_t port = traits_type::InvalidValue()) | |
| 78 : ScopedGeneric(port) {} | |
| 79 | |
| 80 operator mach_port_t() const { return get(); } | |
| 81 }; | |
| 82 | |
| 83 } // namespace mac | |
| 84 } // namespace base | |
| 85 | |
| 86 #endif // BASE_MAC_SCOPED_MACH_PORT_H_ | |
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