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Diffstat (limited to 'media/omx-plugin/include/ics/utils/StrongPointer.h')
| -rw-r--r-- | media/omx-plugin/include/ics/utils/StrongPointer.h | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/media/omx-plugin/include/ics/utils/StrongPointer.h b/media/omx-plugin/include/ics/utils/StrongPointer.h new file mode 100644 index 000000000..49fa3a8d6 --- /dev/null +++ b/media/omx-plugin/include/ics/utils/StrongPointer.h @@ -0,0 +1,220 @@ +/* + * Copyright (C) 2005 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef ANDROID_STRONG_POINTER_H +#define ANDROID_STRONG_POINTER_H + +#include <cutils/atomic.h> + +#include <stdint.h> +#include <sys/types.h> +#include <stdlib.h> + +// --------------------------------------------------------------------------- +namespace android { + +class TextOutput; +TextOutput& printStrongPointer(TextOutput& to, const void* val); + +template<typename T> class wp; + +// --------------------------------------------------------------------------- + +#define COMPARE(_op_) \ +inline bool operator _op_ (const sp<T>& o) const { \ + return m_ptr _op_ o.m_ptr; \ +} \ +inline bool operator _op_ (const T* o) const { \ + return m_ptr _op_ o; \ +} \ +template<typename U> \ +inline bool operator _op_ (const sp<U>& o) const { \ + return m_ptr _op_ o.m_ptr; \ +} \ +template<typename U> \ +inline bool operator _op_ (const U* o) const { \ + return m_ptr _op_ o; \ +} \ +inline bool operator _op_ (const wp<T>& o) const { \ + return m_ptr _op_ o.m_ptr; \ +} \ +template<typename U> \ +inline bool operator _op_ (const wp<U>& o) const { \ + return m_ptr _op_ o.m_ptr; \ +} + +// --------------------------------------------------------------------------- + +template <typename T> +class sp +{ +public: + inline sp() : m_ptr(0) { } + + sp(T* other); + sp(const sp<T>& other); + template<typename U> sp(U* other); + template<typename U> sp(const sp<U>& other); + + ~sp(); + + // Assignment + + sp& operator = (T* other); + sp& operator = (const sp<T>& other); + + template<typename U> sp& operator = (const sp<U>& other); + template<typename U> sp& operator = (U* other); + + //! Special optimization for use by ProcessState (and nobody else). + void force_set(T* other); + + // Reset + + void clear(); + + // Accessors + + inline T& operator* () const { return *m_ptr; } + inline T* operator-> () const { return m_ptr; } + inline T* get() const { return m_ptr; } + + // Operators + + COMPARE(==) + COMPARE(!=) + COMPARE(>) + COMPARE(<) + COMPARE(<=) + COMPARE(>=) + +private: + template<typename Y> friend class sp; + template<typename Y> friend class wp; + void set_pointer(T* ptr); + T* m_ptr; +}; + +#undef COMPARE + +template <typename T> +TextOutput& operator<<(TextOutput& to, const sp<T>& val); + +// --------------------------------------------------------------------------- +// No user serviceable parts below here. + +template<typename T> +sp<T>::sp(T* other) +: m_ptr(other) + { + if (other) other->incStrong(this); + } + +template<typename T> +sp<T>::sp(const sp<T>& other) +: m_ptr(other.m_ptr) + { + if (m_ptr) m_ptr->incStrong(this); + } + +template<typename T> template<typename U> +sp<T>::sp(U* other) : m_ptr(other) +{ + if (other) ((T*)other)->incStrong(this); +} + +template<typename T> template<typename U> +sp<T>::sp(const sp<U>& other) +: m_ptr(other.m_ptr) + { + if (m_ptr) m_ptr->incStrong(this); + } + +template<typename T> +sp<T>::~sp() +{ + if (m_ptr) m_ptr->decStrong(this); +} + +template<typename T> +sp<T>& sp<T>::operator = (const sp<T>& other) { + T* otherPtr(other.m_ptr); + if (otherPtr) otherPtr->incStrong(this); + if (m_ptr) m_ptr->decStrong(this); + m_ptr = otherPtr; + return *this; +} + +template<typename T> +sp<T>& sp<T>::operator = (T* other) +{ + if (other) other->incStrong(this); + if (m_ptr) m_ptr->decStrong(this); + m_ptr = other; + return *this; +} + +template<typename T> template<typename U> +sp<T>& sp<T>::operator = (const sp<U>& other) +{ + T* otherPtr(other.m_ptr); + if (otherPtr) otherPtr->incStrong(this); + if (m_ptr) m_ptr->decStrong(this); + m_ptr = otherPtr; + return *this; +} + +template<typename T> template<typename U> +sp<T>& sp<T>::operator = (U* other) +{ + if (other) ((T*)other)->incStrong(this); + if (m_ptr) m_ptr->decStrong(this); + m_ptr = other; + return *this; +} + +template<typename T> +void sp<T>::force_set(T* other) +{ + other->forceIncStrong(this); + m_ptr = other; +} + +template<typename T> +void sp<T>::clear() +{ + if (m_ptr) { + m_ptr->decStrong(this); + m_ptr = 0; + } +} + +template<typename T> +void sp<T>::set_pointer(T* ptr) { + m_ptr = ptr; +} + +template <typename T> +inline TextOutput& operator<<(TextOutput& to, const sp<T>& val) +{ + return printStrongPointer(to, val.get()); +} + +}; // namespace android + +// --------------------------------------------------------------------------- + +#endif // ANDROID_STRONG_POINTER_H |