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      1 /*
      2  * Copyright (C) 2008 The Android Open Source Project
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  *  * Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  *  * Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in
     12  *    the documentation and/or other materials provided with the
     13  *    distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     16  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     17  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
     18  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
     19  * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
     22  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
     25  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #pragma once
     30 
     31 #include "contexts.h"
     32 #include "prop_area.h"
     33 #include "prop_info.h"
     34 
     35 class ContextsPreSplit : public Contexts {
     36  public:
     37   virtual ~ContextsPreSplit() override {
     38   }
     39 
     40   // We'll never initialize this legacy option as writable, so don't even check the arg.
     41   virtual bool Initialize(bool, const char* filename, bool*) override {
     42     pre_split_prop_area_ = prop_area::map_prop_area(filename);
     43     return pre_split_prop_area_ != nullptr;
     44   }
     45 
     46   virtual prop_area* GetPropAreaForName(const char*) override {
     47     return pre_split_prop_area_;
     48   }
     49 
     50   virtual prop_area* GetSerialPropArea() override {
     51     return pre_split_prop_area_;
     52   }
     53 
     54   virtual void ForEach(void (*propfn)(const prop_info* pi, void* cookie), void* cookie) override {
     55     pre_split_prop_area_->foreach (propfn, cookie);
     56   }
     57 
     58   // This is a no-op for pre-split properties as there is only one property file and it is
     59   // accessible by all domains
     60   virtual void ResetAccess() override {
     61   }
     62 
     63   virtual void FreeAndUnmap() override {
     64     prop_area::unmap_prop_area(&pre_split_prop_area_);
     65   }
     66 
     67  private:
     68   prop_area* pre_split_prop_area_ = nullptr;
     69 };
     70