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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "mojo/public/cpp/bindings/lib/fixed_buffer.h" | 5 #include "mojo/public/cpp/bindings/lib/fixed_buffer.h" |
6 | 6 |
7 #include <stdlib.h> | 7 #include <stdlib.h> |
8 | 8 |
9 #include <algorithm> | 9 #include <algorithm> |
10 | 10 |
11 #include "mojo/public/cpp/bindings/lib/bindings_serialization.h" | 11 #include "mojo/public/cpp/bindings/lib/bindings_serialization.h" |
12 #include "mojo/public/cpp/environment/logging.h" | 12 #include "mojo/public/cpp/environment/logging.h" |
13 | 13 |
14 namespace mojo { | 14 namespace mojo { |
15 namespace internal { | 15 namespace internal { |
16 | 16 |
17 FixedBuffer::FixedBuffer() : ptr_(nullptr), cursor_(0), size_(0) {} | 17 FixedBuffer::FixedBuffer() : ptr_(nullptr), cursor_(0), size_(0) {} |
18 | 18 |
19 void FixedBuffer::Initialize(void* memory, size_t size) { | 19 void FixedBuffer::Initialize(void* memory, size_t size) { |
20 MOJO_DCHECK(size == internal::Align(size)); | |
21 | |
22 ptr_ = static_cast<char*>(memory); | 20 ptr_ = static_cast<char*>(memory); |
23 cursor_ = 0; | 21 cursor_ = 0; |
24 size_ = size; | 22 size_ = size; |
25 } | 23 } |
26 | 24 |
27 void* FixedBuffer::Allocate(size_t delta) { | 25 void* FixedBuffer::Allocate(size_t delta) { |
| 26 // Ensure that all memory returned by Allocate() is 8-byte aligned w.r.t the |
| 27 // start of the buffer. |
28 delta = internal::Align(delta); | 28 delta = internal::Align(delta); |
29 | 29 |
30 if (delta == 0 || delta > size_ - cursor_) { | 30 if (delta == 0 || delta > size_ - cursor_) { |
31 MOJO_DCHECK(false) << "Not reached"; | 31 MOJO_DCHECK(false) << "Not reached"; |
32 return nullptr; | 32 return nullptr; |
33 } | 33 } |
34 | 34 |
35 char* result = ptr_ + cursor_; | 35 char* result = ptr_ + cursor_; |
36 cursor_ += delta; | 36 cursor_ += delta; |
37 | 37 |
(...skipping 13 matching lines...) Expand all Loading... |
51 void* FixedBufferForTesting::Leak() { | 51 void* FixedBufferForTesting::Leak() { |
52 char* ptr = ptr_; | 52 char* ptr = ptr_; |
53 ptr_ = nullptr; | 53 ptr_ = nullptr; |
54 cursor_ = 0; | 54 cursor_ = 0; |
55 size_ = 0; | 55 size_ = 0; |
56 return ptr; | 56 return ptr; |
57 } | 57 } |
58 | 58 |
59 } // namespace internal | 59 } // namespace internal |
60 } // namespace mojo | 60 } // namespace mojo |
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