| John Reck | 34781b2 | 2017-07-05 16:39:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2017 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 | #include "ProfileDataContainer.h" |
| 18 | |
| 19 | #include <log/log.h> |
| 20 | #include <cutils/ashmem.h> |
| 21 | |
| 22 | #include <sys/mman.h> |
| 23 | |
| 24 | namespace android { |
| 25 | namespace uirenderer { |
| 26 | |
| 27 | void ProfileDataContainer::freeData() { |
| 28 | if (mIsMapped) { |
| 29 | munmap(mData, sizeof(ProfileData)); |
| 30 | } else { |
| 31 | delete mData; |
| 32 | } |
| 33 | mIsMapped = false; |
| 34 | mData = nullptr; |
| 35 | } |
| 36 | |
| 37 | void ProfileDataContainer::rotateStorage() { |
| 38 | // If we are mapped we want to stop using the ashmem backend and switch to malloc |
| 39 | // We are expecting a switchStorageToAshmem call to follow this, but it's not guaranteed |
| 40 | // If we aren't sitting on top of ashmem then just do a reset() as it's functionally |
| 41 | // equivalent do a free, malloc, reset. |
| 42 | if (mIsMapped) { |
| 43 | freeData(); |
| 44 | mData = new ProfileData; |
| 45 | } |
| 46 | mData->reset(); |
| 47 | } |
| 48 | |
| 49 | void ProfileDataContainer::switchStorageToAshmem(int ashmemfd) { |
| 50 | int regionSize = ashmem_get_size_region(ashmemfd); |
| 51 | if (regionSize < 0) { |
| 52 | int err = errno; |
| 53 | ALOGW("Failed to get ashmem region size from fd %d, err %d %s", ashmemfd, err, strerror(err)); |
| 54 | return; |
| 55 | } |
| 56 | if (regionSize < static_cast<int>(sizeof(ProfileData))) { |
| 57 | ALOGW("Ashmem region is too small! Received %d, required %u", |
| 58 | regionSize, static_cast<unsigned int>(sizeof(ProfileData))); |
| 59 | return; |
| 60 | } |
| 61 | ProfileData* newData = reinterpret_cast<ProfileData*>( |
| 62 | mmap(NULL, sizeof(ProfileData), PROT_READ | PROT_WRITE, |
| 63 | MAP_SHARED, ashmemfd, 0)); |
| 64 | if (newData == MAP_FAILED) { |
| 65 | int err = errno; |
| 66 | ALOGW("Failed to move profile data to ashmem fd %d, error = %d", |
| 67 | ashmemfd, err); |
| 68 | return; |
| 69 | } |
| 70 | |
| 71 | newData->mergeWith(*mData); |
| 72 | freeData(); |
| 73 | mData = newData; |
| 74 | mIsMapped = true; |
| 75 | } |
| 76 | |
| 77 | } /* namespace uirenderer */ |
| 78 | } /* namespace android */ |