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Issue 2250183003: Make the fuchsia mojo/public repo the source of truth. (Closed) Base URL: https://github.com/domokit/mojo.git@master
Patch Set: Created 4 years, 4 months ago
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1 // Copyright 2013 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 "mojo/public/cpp/bindings/lib/bindings_serialization.h"
6
7 #include "mojo/public/cpp/environment/logging.h"
8
9 namespace mojo {
10 namespace internal {
11
12 namespace {
13
14 const size_t kAlignment = 8;
15
16 template <typename T>
17 T AlignImpl(T t) {
18 return t + (kAlignment - (t % kAlignment)) % kAlignment;
19 }
20
21 } // namespace
22
23 size_t Align(size_t size) {
24 return AlignImpl(size);
25 }
26
27 char* AlignPointer(char* ptr) {
28 return reinterpret_cast<char*>(AlignImpl(reinterpret_cast<uintptr_t>(ptr)));
29 }
30
31 bool IsAligned(const void* ptr) {
32 return !(reinterpret_cast<uintptr_t>(ptr) % kAlignment);
33 }
34
35 void EncodePointer(const void* ptr, uint64_t* offset) {
36 if (!ptr) {
37 *offset = 0;
38 return;
39 }
40
41 const char* p_obj = reinterpret_cast<const char*>(ptr);
42 const char* p_slot = reinterpret_cast<const char*>(offset);
43 MOJO_DCHECK(p_obj > p_slot);
44
45 *offset = static_cast<uint64_t>(p_obj - p_slot);
46 }
47
48 const void* DecodePointerRaw(const uint64_t* offset) {
49 if (!*offset)
50 return nullptr;
51 return reinterpret_cast<const char*>(offset) + *offset;
52 }
53
54 void EncodeHandle(Handle* handle, std::vector<Handle>* handles) {
55 if (handle->is_valid()) {
56 handles->push_back(*handle);
57 handle->set_value(static_cast<MojoHandle>(handles->size() - 1));
58 } else {
59 handle->set_value(kEncodedInvalidHandleValue);
60 }
61 }
62
63 void EncodeHandle(Interface_Data* data, std::vector<Handle>* handles) {
64 EncodeHandle(&data->handle, handles);
65 }
66
67 void EncodeHandle(MojoHandle* handle, std::vector<Handle>* handles) {
68 EncodeHandle(reinterpret_cast<Handle*>(handle), handles);
69 }
70
71 void DecodeHandle(Handle* handle, std::vector<Handle>* handles) {
72 if (handle->value() == kEncodedInvalidHandleValue) {
73 *handle = Handle();
74 return;
75 }
76 MOJO_DCHECK(handle->value() < handles->size());
77 // Just leave holes in the vector so we don't screw up other indices.
78 *handle = FetchAndReset(&handles->at(handle->value()));
79 }
80
81 void DecodeHandle(Interface_Data* data, std::vector<Handle>* handles) {
82 DecodeHandle(&data->handle, handles);
83 }
84
85 void DecodeHandle(MojoHandle* handle, std::vector<Handle>* handles) {
86 DecodeHandle(reinterpret_cast<Handle*>(handle), handles);
87 }
88
89 } // namespace internal
90 } // namespace mojo
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