Patch for allowing several V8 instances in process:...

src/dateparser.h

 // Copyright 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 50 matching lines @@
   // Indicates a missing value.
   static const int kNone = kMaxInt;
 
   // InputReader provides basic string parsing and character classification.
   template <typename Char>
   class InputReader BASE_EMBEDDED {
    public:
     explicit InputReader(Vector<Char> s)
         : index_(0),
           buffer_(s),
+          v8context_(v8_context()),
           has_read_number_(false) {
       Next();
     }
 
     // Advance to the next character of the string.
     void Next() { ch_ = (index_ < buffer_.length()) ? buffer_[index_++] : 0; }
 
     // Read a string of digits as an unsigned number (cap just below kMaxInt).
     int ReadUnsignedNumber() {
       has_read_number_ = true;
@@ skipping 13 matching lines @@
         if (len < prefix_size) prefix[len] = GetAsciiAlphaLower();
       }
       for (int i = len; i < prefix_size; i++) prefix[i] = 0;
       return len;
     }
 
     // The skip methods return whether they actually skipped something.
     bool Skip(uint32_t c) { return ch_ == c ?  (Next(), true) : false; }
 
     bool SkipWhiteSpace() {
-      return Scanner::kIsWhiteSpace.get(ch_) ? (Next(), true) : false;
+      return v8context_->scanner_data_.
+        kIsWhiteSpace_.get(ch_) ? (Next(), true) : false;
     }
 
     bool SkipParentheses() {
       if (ch_ != '(') return false;
       int balance = 0;
       do {
         if (ch_ == ')') --balance;
         else if (ch_ == '(') ++balance;
         Next();
       } while (balance > 0 && ch_);
@@ skipping 12 matching lines @@
 
     // Indicates whether any (possibly empty!) numbers have been read.
     bool HasReadNumber() const { return has_read_number_; }
 
    private:
     // If current character is in 'A'-'Z' or 'a'-'z', return its lower-case.
     // Else, return something outside of 'A'-'Z' and 'a'-'z'.
     uint32_t GetAsciiAlphaLower() const { return ch_ | 32; }
 
     int index_;
+    V8Context* const v8context_;
     Vector<Char> buffer_;
     bool has_read_number_;
     uint32_t ch_;
   };
 
   enum KeywordType { INVALID, MONTH_NAME, TIME_ZONE_NAME, AM_PM };
 
   // KeywordTable maps names of months, time zones, am/pm to numbers.
   class KeywordTable : public AllStatic {
    public:
@@ skipping 84 matching lines @@
     int comp_[kSize];
     int index_;
     int named_month_;
   };
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_DATEPARSER_H_