55 lines
1.4 KiB
C++
55 lines
1.4 KiB
C++
/*
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* Copyright (C) 2021 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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#define LOG_TAG "LargeParcelable"
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#include "MappedFile.h"
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#include <utils/Log.h>
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#include <assert.h>
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#include <errno.h>
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#include <sys/mman.h>
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namespace android {
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namespace automotive {
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namespace car_binder_lib {
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MappedFile::MappedFile(int memoryFd, int32_t fileSize, bool writtable) {
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mAddr = mmap(/*addr=*/NULL, fileSize, (writtable ? PROT_WRITE : PROT_READ), MAP_SHARED,
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memoryFd, /*offset=*/0);
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if (mAddr == MAP_FAILED) {
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ALOGE("mmap failed: %s", std::strerror(errno));
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mErrno = errno;
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}
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mReadOnly = !writtable;
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mSize = fileSize;
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}
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void MappedFile::sync() const {
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msync(mAddr, mSize, MS_SYNC);
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}
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MappedFile::~MappedFile() {
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if (isValid()) {
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munmap(mAddr, mSize);
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}
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}
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} // namespace car_binder_lib
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} // namespace automotive
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} // namespace android
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