js/src/vm/StencilObject.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  * vim: set ts=8 sts=2 et sw=2 tw=80:
   3  * This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef vm_StencilObject_h
   8 #define vm_StencilObject_h
   9
  10 #include "mozilla/RefPtr.h"  // RefPtr
  11
  12 #include <stddef.h>  // size_t
  13 #include <stdint.h>  // uint8_t
  14
  15 #include "js/Class.h"                   // JSClassOps, JSClass
  16 #include "js/experimental/JSStencil.h"  // JS::Stencil
  17 #include "js/TypeDecls.h"
  18 #include "vm/NativeObject.h"  // NativeObject
  19
  20 class JSObject;
  21
  22 namespace js {
  23
  24 // Object that holds JS::Stencil.
  25 //
  26 // This is a testing-only feature which can only be produced by testing
  27 // functions.
  28 class StencilObject : public NativeObject {
  29   static constexpr size_t StencilSlot = 0;
  30   static constexpr size_t ReservedSlots = 1;
  31
  32  public:
  33   static const JSClassOps classOps_;
  34   static const JSClass class_;
  35
  36   bool hasStencil() const;
  37   JS::Stencil* stencil() const;
  38
  39   static StencilObject* create(JSContext* cx, RefPtr<JS::Stencil> stencil);
  40   static void finalize(JS::GCContext* gcx, JSObject* obj);
  41 };
  42
  43 // Object that holds Stencil XDR buffer.
  44 //
  45 // This is a testing-only feature which can only be produced by testing
  46 // functions.
  47 class StencilXDRBufferObject : public NativeObject {
  48   static constexpr size_t BufferSlot = 0;
  49   static constexpr size_t LengthSlot = 1;
  50   static constexpr size_t ReservedSlots = 2;
  51
  52  public:
  53   static const JSClassOps classOps_;
  54   static const JSClass class_;
  55
  56   bool hasBuffer() const;
  57   const uint8_t* buffer() const;
  58   size_t bufferLength() const;
  59
  60  private:
  61   uint8_t* writableBuffer();
  62
  63  public:
  64   static StencilXDRBufferObject* create(JSContext* cx, uint8_t* buffer,
  65                                         size_t length);
  66   static void finalize(JS::GCContext* gcx, JSObject* obj);
  67 };
  68
  69 } /* namespace js */
  70
  71 #endif /* vm_StencilObject_h */