gin/v8_platform_thread_isolated_allocator.h

   1 // Copyright 2023 The Chromium Authors
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef GIN_V8_PLATFORM_THREAD_ISOLATED_ALLOCATOR_H_
   6 #define GIN_V8_PLATFORM_THREAD_ISOLATED_ALLOCATOR_H_
   7
   8 #include "base/allocator/partition_allocator/src/partition_alloc/partition_alloc_buildflags.h"
   9
  10 #if BUILDFLAG(ENABLE_THREAD_ISOLATION)
  11
  12 #if !BUILDFLAG(ENABLE_PKEYS)
  13 #error Not implemented for non-pkey thread isolation
  14 #endif  // BUILDFLAG(ENABLE_PKEYS)
  15
  16 #include "base/allocator/partition_allocator/src/partition_alloc/partition_alloc.h"
  17 #include "gin/gin_export.h"
  18 #include "v8/include/v8-platform.h"
  19
  20 namespace gin {
  21
  22 // This is a wrapper around PartitionAlloc's ThreadIsolated pool that we pass to
  23 // v8.
  24 class GIN_EXPORT ThreadIsolatedAllocator final
  25     : public v8::ThreadIsolatedAllocator {
  26  public:
  27   ThreadIsolatedAllocator();
  28   ~ThreadIsolatedAllocator() override;
  29
  30   void Initialize(int pkey);
  31
  32   void* Allocate(size_t size) override;
  33   void Free(void* object) override;
  34   enum Type Type() const override;
  35
  36   int Pkey() const override;
  37
  38  private:
  39   partition_alloc::PartitionAllocator allocator_;
  40   int pkey_ = -1;
  41 };
  42
  43 }  // namespace gin
  44
  45 #endif  // BUILDFLAG(ENABLE_THREAD_ISOLATION)
  46
  47 #endif  // GIN_V8_PLATFORM_THREAD_ISOLATED_ALLOCATOR_H_