1 /*
2 * Copyright (C) 2024 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #ifndef CHRE_UTIL_SYSTEM_MESSAGE_ROUTER_CALLBACK_ALLOCATOR_IMPL_H_
18 #define CHRE_UTIL_SYSTEM_MESSAGE_ROUTER_CALLBACK_ALLOCATOR_IMPL_H_
19
20 #include <pw_allocator/allocator.h>
21 #include <pw_allocator/capability.h>
22 #include <pw_allocator/unique_ptr.h>
23 #include <pw_containers/vector.h>
24 #include <pw_function/function.h>
25 #include <cstddef>
26 #include <optional>
27
28 #include "chre/util/lock_guard.h"
29 #include "chre/util/system/message_common.h"
30 #include "chre/util/system/message_router_callback_allocator.h"
31
32 namespace chre::message {
33
34 template <typename Metadata>
MessageRouterCallbackAllocator(MessageFreeCallback && callback,pw::Vector<FreeCallbackRecord> & freeCallbackRecords)35 MessageRouterCallbackAllocator<Metadata>::MessageRouterCallbackAllocator(
36 MessageFreeCallback &&callback,
37 pw::Vector<FreeCallbackRecord> &freeCallbackRecords)
38 : pw::Allocator(kCapabilities),
39 mCallback(std::move(callback)),
40 mFreeCallbackRecords(freeCallbackRecords) {}
41
42 template <typename Metadata>
DoAllocate(Layout)43 void *MessageRouterCallbackAllocator<Metadata>::DoAllocate(
44 Layout /* layout */) {
45 return nullptr;
46 }
47
48 template <typename Metadata>
DoDeallocate(void * ptr)49 void MessageRouterCallbackAllocator<Metadata>::DoDeallocate(void *ptr) {
50 std::optional<FreeCallbackRecord> freeCallbackRecord;
51 {
52 LockGuard<Mutex> lock(mMutex);
53 for (FreeCallbackRecord &record : mFreeCallbackRecords) {
54 if (record.message == ptr) {
55 freeCallbackRecord = std::move(record);
56 mFreeCallbackRecords.erase(&record);
57 break;
58 }
59 }
60 }
61
62 if (freeCallbackRecord.has_value()) {
63 mCallback(freeCallbackRecord->message, freeCallbackRecord->messageSize,
64 freeCallbackRecord->metadata);
65 }
66 }
67
68 template <typename Metadata>
69 pw::UniquePtr<std::byte[]>
MakeUniqueArrayWithCallback(std::byte * ptr,size_t size,Metadata && metadata)70 MessageRouterCallbackAllocator<Metadata>::MakeUniqueArrayWithCallback(
71 std::byte *ptr, size_t size, Metadata &&metadata) {
72 {
73 LockGuard<Mutex> lock(mMutex);
74 if (mFreeCallbackRecords.full()) {
75 return pw::UniquePtr<std::byte[]>();
76 }
77
78 mFreeCallbackRecords.push_back(
79 {.message = ptr, .metadata = std::move(metadata), .messageSize = size});
80 }
81
82 return WrapUniqueArray(ptr, size);
83 }
84
85 } // namespace chre::message
86
87 #endif // CHRE_UTIL_SYSTEM_MESSAGE_ROUTER_CALLBACK_ALLOCATOR_IMPL_H_
88