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78 lines
2.4 KiB
78 lines
2.4 KiB
/* |
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* Copyright (C) 2017 The Android Open Source Project |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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#include "ProfileDataContainer.h" |
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#include <log/log.h> |
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#include <cutils/ashmem.h> |
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#include <sys/mman.h> |
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namespace android { |
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namespace uirenderer { |
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void ProfileDataContainer::freeData() { |
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if (mIsMapped) { |
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munmap(mData, sizeof(ProfileData)); |
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} else { |
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delete mData; |
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} |
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mIsMapped = false; |
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mData = nullptr; |
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} |
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void ProfileDataContainer::rotateStorage() { |
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// If we are mapped we want to stop using the ashmem backend and switch to malloc |
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// We are expecting a switchStorageToAshmem call to follow this, but it's not guaranteed |
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// If we aren't sitting on top of ashmem then just do a reset() as it's functionally |
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// equivalent do a free, malloc, reset. |
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if (mIsMapped) { |
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freeData(); |
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mData = new ProfileData; |
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} |
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mData->reset(); |
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} |
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void ProfileDataContainer::switchStorageToAshmem(int ashmemfd) { |
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int regionSize = ashmem_get_size_region(ashmemfd); |
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if (regionSize < 0) { |
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int err = errno; |
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ALOGW("Failed to get ashmem region size from fd %d, err %d %s", ashmemfd, err, strerror(err)); |
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return; |
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} |
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if (regionSize < static_cast<int>(sizeof(ProfileData))) { |
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ALOGW("Ashmem region is too small! Received %d, required %u", |
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regionSize, static_cast<unsigned int>(sizeof(ProfileData))); |
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return; |
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} |
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ProfileData* newData = reinterpret_cast<ProfileData*>( |
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mmap(NULL, sizeof(ProfileData), PROT_READ | PROT_WRITE, |
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MAP_SHARED, ashmemfd, 0)); |
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if (newData == MAP_FAILED) { |
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int err = errno; |
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ALOGW("Failed to move profile data to ashmem fd %d, error = %d", |
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ashmemfd, err); |
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return; |
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} |
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newData->mergeWith(*mData); |
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freeData(); |
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mData = newData; |
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mIsMapped = true; |
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} |
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} /* namespace uirenderer */ |
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} /* namespace android */ |