import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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