intl/icu/source/common/servnotf.h@6474c204b198 (annotated)
intl/icu/source/common/servnotf.h
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /** |
| michael@0 | 2 | ******************************************************************************* |
| michael@0 | 3 | * Copyright (C) 2001-2011, International Business Machines Corporation and * |
| michael@0 | 4 | * others. All Rights Reserved. * |
| michael@0 | 5 | ******************************************************************************* |
| michael@0 | 6 | */ |
| michael@0 | 7 | #ifndef ICUNOTIF_H |
| michael@0 | 8 | #define ICUNOTIF_H |
| michael@0 | 9 | |
| michael@0 | 10 | #include "unicode/utypes.h" |
| michael@0 | 11 | |
| michael@0 | 12 | #if UCONFIG_NO_SERVICE |
| michael@0 | 13 | |
| michael@0 | 14 | U_NAMESPACE_BEGIN |
| michael@0 | 15 | |
| michael@0 | 16 | /* |
| michael@0 | 17 | * Allow the declaration of APIs with pointers to BreakIterator |
| michael@0 | 18 | * even when break iteration is removed from the build. |
| michael@0 | 19 | */ |
| michael@0 | 20 | class ICUNotifier; |
| michael@0 | 21 | |
| michael@0 | 22 | U_NAMESPACE_END |
| michael@0 | 23 | |
| michael@0 | 24 | #else |
| michael@0 | 25 | |
| michael@0 | 26 | #include "unicode/uobject.h" |
| michael@0 | 27 | #include "unicode/unistr.h" |
| michael@0 | 28 | |
| michael@0 | 29 | #include "mutex.h" |
| michael@0 | 30 | #include "uvector.h" |
| michael@0 | 31 | |
| michael@0 | 32 | U_NAMESPACE_BEGIN |
| michael@0 | 33 | |
| michael@0 | 34 | class U_COMMON_API EventListener : public UObject { |
| michael@0 | 35 | public: |
| michael@0 | 36 | virtual ~EventListener(); |
| michael@0 | 37 | |
| michael@0 | 38 | public: |
| michael@0 | 39 | static UClassID U_EXPORT2 getStaticClassID(); |
| michael@0 | 40 | |
| michael@0 | 41 | virtual UClassID getDynamicClassID() const; |
| michael@0 | 42 | |
| michael@0 | 43 | public: |
| michael@0 | 44 | #ifdef SERVICE_DEBUG |
| michael@0 | 45 | virtual UnicodeString& debug(UnicodeString& result) const { |
| michael@0 | 46 | return debugClass(result); |
| michael@0 | 47 | } |
| michael@0 | 48 | |
| michael@0 | 49 | virtual UnicodeString& debugClass(UnicodeString& result) const { |
| michael@0 | 50 | return result.append("Key"); |
| michael@0 | 51 | } |
| michael@0 | 52 | #endif |
| michael@0 | 53 | }; |
| michael@0 | 54 | |
| michael@0 | 55 | /** |
| michael@0 | 56 | * <p>Abstract implementation of a notification facility. Clients add |
| michael@0 | 57 | * EventListeners with addListener and remove them with removeListener. |
| michael@0 | 58 | * Notifiers call notifyChanged when they wish to notify listeners. |
| michael@0 | 59 | * This queues the listener list on the notification thread, which |
| michael@0 | 60 | * eventually dequeues the list and calls notifyListener on each |
| michael@0 | 61 | * listener in the list.</p> |
| michael@0 | 62 | * |
| michael@0 | 63 | * <p>Subclasses override acceptsListener and notifyListener |
| michael@0 | 64 | * to add type-safe notification. AcceptsListener should return |
| michael@0 | 65 | * true if the listener is of the appropriate type; ICUNotifier |
| michael@0 | 66 | * itself will ensure the listener is non-null and that the |
| michael@0 | 67 | * identical listener is not already registered with the Notifier. |
| michael@0 | 68 | * NotifyListener should cast the listener to the appropriate |
| michael@0 | 69 | * type and call the appropriate method on the listener. |
| michael@0 | 70 | */ |
| michael@0 | 71 | |
| michael@0 | 72 | class U_COMMON_API ICUNotifier : public UMemory { |
| michael@0 | 73 | private: UVector* listeners; |
| michael@0 | 74 | |
| michael@0 | 75 | public: |
| michael@0 | 76 | ICUNotifier(void); |
| michael@0 | 77 | |
| michael@0 | 78 | virtual ~ICUNotifier(void); |
| michael@0 | 79 | |
| michael@0 | 80 | /** |
| michael@0 | 81 | * Add a listener to be notified when notifyChanged is called. |
| michael@0 | 82 | * The listener must not be null. AcceptsListener must return |
| michael@0 | 83 | * true for the listener. Attempts to concurrently |
| michael@0 | 84 | * register the identical listener more than once will be |
| michael@0 | 85 | * silently ignored. |
| michael@0 | 86 | */ |
| michael@0 | 87 | virtual void addListener(const EventListener* l, UErrorCode& status); |
| michael@0 | 88 | |
| michael@0 | 89 | /** |
| michael@0 | 90 | * Stop notifying this listener. The listener must |
| michael@0 | 91 | * not be null. Attemps to remove a listener that is |
| michael@0 | 92 | * not registered will be silently ignored. |
| michael@0 | 93 | */ |
| michael@0 | 94 | virtual void removeListener(const EventListener* l, UErrorCode& status); |
| michael@0 | 95 | |
| michael@0 | 96 | /** |
| michael@0 | 97 | * ICU doesn't spawn its own threads. All listeners are notified in |
| michael@0 | 98 | * the thread of the caller. Misbehaved listeners can therefore |
| michael@0 | 99 | * indefinitely block the calling thread. Callers should beware of |
| michael@0 | 100 | * deadlock situations. |
| michael@0 | 101 | */ |
| michael@0 | 102 | virtual void notifyChanged(void); |
| michael@0 | 103 | |
| michael@0 | 104 | protected: |
| michael@0 | 105 | /** |
| michael@0 | 106 | * Subclasses implement this to return TRUE if the listener is |
| michael@0 | 107 | * of the appropriate type. |
| michael@0 | 108 | */ |
| michael@0 | 109 | virtual UBool acceptsListener(const EventListener& l) const = 0; |
| michael@0 | 110 | |
| michael@0 | 111 | /** |
| michael@0 | 112 | * Subclasses implement this to notify the listener. |
| michael@0 | 113 | */ |
| michael@0 | 114 | virtual void notifyListener(EventListener& l) const = 0; |
| michael@0 | 115 | }; |
| michael@0 | 116 | |
| michael@0 | 117 | U_NAMESPACE_END |
| michael@0 | 118 | |
| michael@0 | 119 | /* UCONFIG_NO_SERVICE */ |
| michael@0 | 120 | #endif |
| michael@0 | 121 | |
| michael@0 | 122 | /* ICUNOTIF_H */ |
| michael@0 | 123 | #endif |
