Introducing MemoryMappedExternalResource for creating an external...

src/platform.h

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 156 matching lines @@
   // taking daylight savings time into account.
   static double LocalTimeOffset();
 
   // Returns the daylight savings offset for the given time.
   static double DaylightSavingsOffset(double time);
 
   // Returns last OS error.
   static int GetLastError();
 
   static FILE* FOpen(const char* path, const char* mode);
+  static bool Remove(const char* path);
 
   // Log file open mode is platform-dependent due to line ends issues.
   static const char* LogFileOpenMode;
 
   // Print output to console. This is mostly used for debugging output.
   // On platforms that has standard terminal output, the output
   // should go to stdout.
   static void Print(const char* format, ...);
   static void VPrint(const char* format, va_list args);
 
@@ skipping 57 matching lines @@
   // Factory method for creating platform dependent Semaphore.
   // Please use delete to reclaim the storage for the returned Semaphore.
   static Semaphore* CreateSemaphore(int count);
 
   // Factory method for creating platform dependent Socket.
   // Please use delete to reclaim the storage for the returned Socket.
   static Socket* CreateSocket();
 
   class MemoryMappedFile {
    public:
+    static MemoryMappedFile* open(const char* name);
     static MemoryMappedFile* create(const char* name, int size, void* initial);
     virtual ~MemoryMappedFile() { }
     virtual void* memory() = 0;
+    virtual int size() = 0;
   };
 
   // Safe formatting print. Ensures that str is always null-terminated.
   // Returns the number of chars written, or -1 if output was truncated.
   static int SNPrintF(Vector<char> str, const char* format, ...);
   static int VSNPrintF(Vector<char> str,
                        const char* format,
                        va_list args);
 
   static char* StrChr(char* str, int c);
@@ skipping 357 matching lines @@
   PlatformData* data_;  // Platform specific data.
   int samples_taken_;  // Counts stack samples taken.
   DISALLOW_IMPLICIT_CONSTRUCTORS(Sampler);
 };
 
 #endif  // ENABLE_LOGGING_AND_PROFILING
 
 } }  // namespace v8::internal
 
 #endif  // V8_PLATFORM_H_