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1 // Copyright (c) 2009 The Chromium OS Authors. All rights reserved. | 1 // Copyright (c) 2009 The Chromium OS Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef CHROMEOS_DBUS_H_ | 5 #ifndef CHROMEOS_DBUS_H_ |
6 #define CHROMEOS_DBUS_H_ | 6 #define CHROMEOS_DBUS_H_ |
7 | 7 |
8 #include <dbus/dbus-glib.h> | 8 #include <dbus/dbus-glib.h> |
9 #include <glib-object.h> | 9 #include <glib-object.h> |
10 | 10 |
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27 // bus. | 27 // bus. |
28 // | 28 // |
29 // \models Copyable, Assignable | 29 // \models Copyable, Assignable |
30 // \related GetSystemBusConnection() | 30 // \related GetSystemBusConnection() |
31 | 31 |
32 class BusConnection { | 32 class BusConnection { |
33 public: | 33 public: |
34 typedef ::DBusGConnection* value_type; | 34 typedef ::DBusGConnection* value_type; |
35 | 35 |
36 BusConnection(const BusConnection& x) | 36 BusConnection(const BusConnection& x) |
37 : object_(dbus_g_connection_ref(x.object_)) { | 37 : object_(x.object_) { |
| 38 if (object_) |
| 39 ::dbus_g_connection_ref(object_); |
38 } | 40 } |
39 | 41 |
40 ~BusConnection() { | 42 ~BusConnection() { |
41 ::dbus_g_connection_unref(object_); | 43 if (object_) |
| 44 ::dbus_g_connection_unref(object_); |
42 } | 45 } |
43 | 46 |
44 BusConnection& operator=(BusConnection x) { | 47 BusConnection& operator=(BusConnection x) { |
45 swap(*this, x); | 48 swap(*this, x); |
46 return *this; | 49 return *this; |
47 } | 50 } |
48 | 51 |
49 const value_type& g_connection() const { | 52 const value_type& g_connection() const { |
50 DCHECK(object_) << "referencing an empty connection"; | 53 DCHECK(object_) << "referencing an empty connection"; |
51 return object_; | 54 return object_; |
52 } | 55 } |
53 | 56 |
| 57 operator bool() const { |
| 58 return object_; |
| 59 } |
| 60 |
| 61 bool HasConnection() const { |
| 62 return object_; |
| 63 } |
| 64 |
54 private: | 65 private: |
55 friend void swap(BusConnection& x, BusConnection& y); | 66 friend void swap(BusConnection& x, BusConnection& y); |
56 | 67 |
57 friend class Proxy; | 68 friend class Proxy; |
58 friend BusConnection GetSystemBusConnection(); | 69 friend BusConnection GetSystemBusConnection(); |
59 friend BusConnection GetPrivateBusConnection(const char* address); | 70 friend BusConnection GetPrivateBusConnection(const char* address); |
60 | 71 |
61 // Constructor takes ownership | 72 // Constructor takes ownership |
62 explicit BusConnection(::DBusGConnection* x) | 73 explicit BusConnection(::DBusGConnection* x) |
63 : object_(x) { | 74 : object_(x) { |
64 DCHECK(object_) << "Constructing BusConnection with NULL object."; | |
65 } | 75 } |
66 | 76 |
67 value_type object_; | 77 value_type object_; |
68 }; | 78 }; |
69 | 79 |
70 inline void swap(BusConnection& x, BusConnection& y) { | 80 inline void swap(BusConnection& x, BusConnection& y) { |
71 std::swap(x.object_, y.object_); | 81 std::swap(x.object_, y.object_); |
72 } | 82 } |
73 | 83 |
74 // \brief Proxy manages the ref-count for a ::DBusGProxy*. | 84 // \brief Proxy manages the ref-count for a ::DBusGProxy*. |
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350 BusConnection GetSystemBusConnection(); | 360 BusConnection GetSystemBusConnection(); |
351 | 361 |
352 // \brief Returns a private connection to a bus at |address|. | 362 // \brief Returns a private connection to a bus at |address|. |
353 | 363 |
354 BusConnection GetPrivateBusConnection(const char* address); | 364 BusConnection GetPrivateBusConnection(const char* address); |
355 | 365 |
356 } // namespace dbus | 366 } // namespace dbus |
357 } // namespace chromeos | 367 } // namespace chromeos |
358 | 368 |
359 #endif // CHROMEOS_DBUS_H_ | 369 #endif // CHROMEOS_DBUS_H_ |
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