Merge isolates to bleeding_edge.

src/regexp-stack.h

 // Copyright 2009 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 13 matching lines @@
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #ifndef V8_REGEXP_STACK_H_
 #define V8_REGEXP_STACK_H_
 
 namespace v8 {
 namespace internal {
 
+class RegExpStack;
+
 // Maintains a per-v8thread stack area that can be used by irregexp
 // implementation for its backtracking stack.
 // Since there is only one stack area, the Irregexp implementation is not
 // re-entrant. I.e., no regular expressions may be executed in the same thread
 // during a preempted Irregexp execution.
+class RegExpStackScope {
+ public:
+  // Create and delete an instance to control the life-time of a growing stack.
+
+  // Initializes the stack memory area if necessary.
+  explicit RegExpStackScope(Isolate* isolate);
+  ~RegExpStackScope();  // Releases the stack if it has grown.
+
+  RegExpStack* stack() const { return regexp_stack_; }
+
+ private:
+  RegExpStack* regexp_stack_;
+
+  DISALLOW_COPY_AND_ASSIGN(RegExpStackScope);
+};
+
+
 class RegExpStack {
  public:
   // Number of allocated locations on the stack below the limit.
   // No sequence of pushes must be longer that this without doing a stack-limit
   // check.
   static const int kStackLimitSlack = 32;
 
-  // Create and delete an instance to control the life-time of a growing stack.
-  RegExpStack();  // Initializes the stack memory area if necessary.
-  ~RegExpStack();  // Releases the stack if it has grown.
-
   // Gives the top of the memory used as stack.
-  static Address stack_base() {
+  Address stack_base() {
     ASSERT(thread_local_.memory_size_ != 0);
     return thread_local_.memory_ + thread_local_.memory_size_;
   }
 
   // The total size of the memory allocated for the stack.
-  static size_t stack_capacity() { return thread_local_.memory_size_; }
+  size_t stack_capacity() { return thread_local_.memory_size_; }
 
   // If the stack pointer gets below the limit, we should react and
   // either grow the stack or report an out-of-stack exception.
   // There is only a limited number of locations below the stack limit,
   // so users of the stack should check the stack limit during any
   // sequence of pushes longer that this.
-  static Address* limit_address() { return &(thread_local_.limit_); }
+  Address* limit_address() { return &(thread_local_.limit_); }
 
   // Ensures that there is a memory area with at least the specified size.
   // If passing zero, the default/minimum size buffer is allocated.
-  static Address EnsureCapacity(size_t size);
+  Address EnsureCapacity(size_t size);
 
   // Thread local archiving.
   static int ArchiveSpacePerThread() {
-    return static_cast<int>(sizeof(thread_local_));
+    return static_cast<int>(sizeof(ThreadLocal));
   }
-  static char* ArchiveStack(char* to);
-  static char* RestoreStack(char* from);
-  static void FreeThreadResources() { thread_local_.Free(); }
+  char* ArchiveStack(char* to);
+  char* RestoreStack(char* from);
+  void FreeThreadResources() { thread_local_.Free(); }
+ private:
+  RegExpStack();
+  ~RegExpStack();
 
- private:
   // Artificial limit used when no memory has been allocated.
   static const uintptr_t kMemoryTop = static_cast<uintptr_t>(-1);
 
   // Minimal size of allocated stack area.
   static const size_t kMinimumStackSize = 1 * KB;
 
   // Maximal size of allocated stack area.
   static const size_t kMaximumStackSize = 64 * MB;
 
   // Structure holding the allocated memory, size and limit.
   struct ThreadLocal {
-    ThreadLocal()
-        : memory_(NULL),
-          memory_size_(0),
-          limit_(reinterpret_cast<Address>(kMemoryTop)) {}
+    ThreadLocal() { Clear(); }
     // If memory_size_ > 0 then memory_ must be non-NULL.
     Address memory_;
     size_t memory_size_;
     Address limit_;
+    void Clear() {
+      memory_ = NULL;
+      memory_size_ = 0;
+      limit_ = reinterpret_cast<Address>(kMemoryTop);
+    }
     void Free();
   };
 
   // Address of allocated memory.
-  static Address memory_address() {
+  Address memory_address() {
     return reinterpret_cast<Address>(&thread_local_.memory_);
   }
 
   // Address of size of allocated memory.
-  static Address memory_size_address() {
+  Address memory_size_address() {
     return reinterpret_cast<Address>(&thread_local_.memory_size_);
   }
 
   // Resets the buffer if it has grown beyond the default/minimum size.
   // After this, the buffer is either the default size, or it is empty, so
   // you have to call EnsureCapacity before using it again.
-  static void Reset();
+  void Reset();
 
-  static ThreadLocal thread_local_;
+  ThreadLocal thread_local_;
+  Isolate* isolate_;
 
   friend class ExternalReference;
+  friend class Isolate;
+  friend class RegExpStackScope;
+
+  DISALLOW_COPY_AND_ASSIGN(RegExpStack);
 };
 
 }}  // namespace v8::internal
 
 #endif  // V8_REGEXP_STACK_H_