17b5b82d64
system/core/include is included in the global include path using -isystem, which hides all warnings. Fix warnings in libutils headers in preparation for moving from -isystem to -I. - Fix implicit cast from int64_t to long in Condition.h. Remove the __LP64__ check and always compare against LONG_MAX before casting. - Fix implicit cast from size_t to ssize_t in KeyedVector.h - Fix -Wshadow-field-in-constructor warnings in Looper.h and RefBase.h - Move destructors for MessageHandler and LooperCallback to Looper.cpp and ReferenceRenamer and VirtualLightRefBase to RefBase.cpp to prevent vtables in every compilation unit. - Declare template variables in Singleton.h - Fix old-style casts in StrongPointer.h and TypeHelpers.h - Use template metaprogramming in TypeHelpers.h to avoid warnings on memmove on non-trivial types. - Add an assignment operator to key_value_pair_t to complete rule-of-three - Use memcpy instead of dereferencing a reinterpret_casted pointer to treat the bits of a float or double as int32_t or int64_t - Escape unicode sequences inside doxygen comments between \code and \endcode - Remove WIN32 ZD definition in Compat.h, %zd works fine with mingw - Fix WIN32 printf warnings in Filemap.cpp - Initialize mNullValue with 0 in LruCache.h, some of the tests use a non-pointer type for TValue. Test: m -j native Bug: 31492149 Change-Id: I385a05a3ca01258e44fe3b37ef77e4aaff547b26
85 lines
2.4 KiB
C++
85 lines
2.4 KiB
C++
/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_UTILS_SINGLETON_H
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#define ANDROID_UTILS_SINGLETON_H
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#include <stdint.h>
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#include <sys/types.h>
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#include <utils/Mutex.h>
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#include <utils/threads.h>
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#include <cutils/compiler.h>
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namespace android {
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// ---------------------------------------------------------------------------
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template <typename TYPE>
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class ANDROID_API Singleton
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{
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public:
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static TYPE& getInstance() {
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Mutex::Autolock _l(sLock);
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TYPE* instance = sInstance;
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if (instance == 0) {
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instance = new TYPE();
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sInstance = instance;
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}
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return *instance;
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}
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static bool hasInstance() {
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Mutex::Autolock _l(sLock);
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return sInstance != 0;
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}
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protected:
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~Singleton() { }
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Singleton() { }
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private:
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Singleton(const Singleton&);
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Singleton& operator = (const Singleton&);
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static Mutex sLock;
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static TYPE* sInstance;
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};
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template <typename TYPE>
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Mutex Singleton<TYPE>::sLock;
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template <typename TYPE>
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TYPE* Singleton<TYPE>::sInstance;
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/*
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* use ANDROID_SINGLETON_STATIC_INSTANCE(TYPE) in your implementation file
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* (eg: <TYPE>.cpp) to create the static instance of Singleton<>'s attributes,
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* and avoid to have a copy of them in each compilation units Singleton<TYPE>
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* is used.
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* NOTE: we use a version of Mutex ctor that takes a parameter, because
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* for some unknown reason using the default ctor doesn't emit the variable!
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*/
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#define ANDROID_SINGLETON_STATIC_INSTANCE(TYPE) \
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template<> ::android::Mutex \
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(::android::Singleton< TYPE >::sLock)(::android::Mutex::PRIVATE); \
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template<> TYPE* ::android::Singleton< TYPE >::sInstance(0); \
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template class ::android::Singleton< TYPE >;
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// ---------------------------------------------------------------------------
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}; // namespace android
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#endif // ANDROID_UTILS_SINGLETON_H
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