1 // Copyright 2017 the V8 project authors. All rights reserved.
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 V8_BASE_PAGE_ALLOCATOR_H_
6 #define V8_BASE_PAGE_ALLOCATOR_H_
7 
8 #include "include/v8-platform.h"
9 #include "src/base/base-export.h"
10 #include "src/base/compiler-specific.h"
11 
12 namespace v8 {
13 namespace base {
14 
15 class V8_BASE_EXPORT PageAllocator
NON_EXPORTED_BASE(::v8::PageAllocator)16     : public NON_EXPORTED_BASE(::v8::PageAllocator) {
17  public:
18   virtual ~PageAllocator() = default;
19 
20   size_t AllocatePageSize() override;
21 
22   size_t CommitPageSize() override;
23 
24   void SetRandomMmapSeed(int64_t seed) override;
25 
26   void* GetRandomMmapAddr() override;
27 
28   void* AllocatePages(void* address, size_t size, size_t alignment,
29                       PageAllocator::Permission access) override;
30 
31   bool FreePages(void* address, size_t size) override;
32 
33   bool ReleasePages(void* address, size_t size, size_t new_size) override;
34 
35   bool SetPermissions(void* address, size_t size,
36                       PageAllocator::Permission access) override;
37 };
38 
39 }  // namespace base
40 }  // namespace v8
41 #endif  // V8_BASE_PAGE_ALLOCATOR_H_
42