reveman | 5ea3425 | 2015-03-18 08:18:16 +0900 | [diff] [blame] | 1 | // Copyright 2015 The Chromium 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 | #include "base/test/test_discardable_memory_allocator.h" |
| 6 | |
jbroman | ef35fe9 | 2016-03-16 10:52:06 +0900 | [diff] [blame^] | 7 | #include <cstdint> |
| 8 | #include <cstring> |
reveman | 5ea3425 | 2015-03-18 08:18:16 +0900 | [diff] [blame] | 9 | |
| 10 | #include "base/memory/discardable_memory.h" |
| 11 | |
| 12 | namespace base { |
| 13 | namespace { |
| 14 | |
| 15 | class DiscardableMemoryImpl : public DiscardableMemory { |
| 16 | public: |
jbroman | ef35fe9 | 2016-03-16 10:52:06 +0900 | [diff] [blame^] | 17 | explicit DiscardableMemoryImpl(size_t size) |
| 18 | : data_(new uint8_t[size]), size_(size) {} |
reveman | 5ea3425 | 2015-03-18 08:18:16 +0900 | [diff] [blame] | 19 | |
| 20 | // Overridden from DiscardableMemory: |
jbroman | ef35fe9 | 2016-03-16 10:52:06 +0900 | [diff] [blame^] | 21 | bool Lock() override { |
| 22 | DCHECK(!is_locked_); |
| 23 | is_locked_ = true; |
| 24 | return false; |
| 25 | } |
| 26 | |
| 27 | void Unlock() override { |
| 28 | DCHECK(is_locked_); |
| 29 | is_locked_ = false; |
| 30 | // Force eviction to catch clients not correctly checking the return value |
| 31 | // of Lock(). |
| 32 | memset(data_.get(), 0, size_); |
| 33 | } |
| 34 | |
| 35 | void* data() const override { |
| 36 | DCHECK(is_locked_); |
| 37 | return data_.get(); |
| 38 | } |
reveman | 5ea3425 | 2015-03-18 08:18:16 +0900 | [diff] [blame] | 39 | |
ssid | bd827b3 | 2015-08-26 00:33:20 +0900 | [diff] [blame] | 40 | trace_event::MemoryAllocatorDump* CreateMemoryAllocatorDump( |
| 41 | const char* name, |
| 42 | trace_event::ProcessMemoryDump* pmd) const override { |
| 43 | return nullptr; |
| 44 | } |
| 45 | |
reveman | 5ea3425 | 2015-03-18 08:18:16 +0900 | [diff] [blame] | 46 | private: |
jbroman | ef35fe9 | 2016-03-16 10:52:06 +0900 | [diff] [blame^] | 47 | bool is_locked_ = true; |
reveman | d0ab04c | 2015-04-17 05:52:18 +0900 | [diff] [blame] | 48 | scoped_ptr<uint8_t[]> data_; |
jbroman | ef35fe9 | 2016-03-16 10:52:06 +0900 | [diff] [blame^] | 49 | size_t size_; |
reveman | 5ea3425 | 2015-03-18 08:18:16 +0900 | [diff] [blame] | 50 | }; |
| 51 | |
| 52 | } // namespace |
| 53 | |
| 54 | TestDiscardableMemoryAllocator::TestDiscardableMemoryAllocator() { |
| 55 | } |
| 56 | |
| 57 | TestDiscardableMemoryAllocator::~TestDiscardableMemoryAllocator() { |
| 58 | } |
| 59 | |
| 60 | scoped_ptr<DiscardableMemory> |
| 61 | TestDiscardableMemoryAllocator::AllocateLockedDiscardableMemory(size_t size) { |
| 62 | return make_scoped_ptr(new DiscardableMemoryImpl(size)); |
| 63 | } |
| 64 | |
| 65 | } // namespace base |