diff options
Diffstat (limited to 'native/jni/src/suggest/policyimpl/dictionary/utils/mmaped_buffer.h')
-rw-r--r-- | native/jni/src/suggest/policyimpl/dictionary/utils/mmaped_buffer.h | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/native/jni/src/suggest/policyimpl/dictionary/utils/mmaped_buffer.h b/native/jni/src/suggest/policyimpl/dictionary/utils/mmaped_buffer.h deleted file mode 100644 index e3aabb084..000000000 --- a/native/jni/src/suggest/policyimpl/dictionary/utils/mmaped_buffer.h +++ /dev/null @@ -1,99 +0,0 @@ -/* - * Copyright (C) 2013, The Android Open Source Project - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#ifndef LATINIME_MMAPED_BUFFER_H -#define LATINIME_MMAPED_BUFFER_H - -#include <cerrno> -#include <fcntl.h> -#include <stdint.h> -#include <sys/mman.h> -#include <unistd.h> - -#include "defines.h" - -namespace latinime { - -class MmapedBuffer { - public: - static MmapedBuffer* openBuffer(const char *const path, const int pathLength, - const int bufOffset, const int size, const bool isUpdatable) { - const int openMode = isUpdatable ? O_RDWR : O_RDONLY; - const int fd = open(path, openMode); - if (fd < 0) { - AKLOGE("DICT: Can't open the source. path=%s errno=%d", path, errno); - return 0; - } - const int pagesize = getpagesize(); - const int offset = bufOffset % pagesize; - int adjOffset = bufOffset - offset; - int adjSize = size + offset; - const int protMode = isUpdatable ? PROT_READ | PROT_WRITE : PROT_READ; - void *const mmapedBuffer = mmap(0, adjSize, protMode, MAP_PRIVATE, fd, adjOffset); - if (mmapedBuffer == MAP_FAILED) { - AKLOGE("DICT: Can't mmap dictionary. errno=%d", errno); - close(fd); - return 0; - } - uint8_t *const buffer = static_cast<uint8_t *>(mmapedBuffer) + bufOffset; - if (!buffer) { - AKLOGE("DICT: buffer is null"); - close(fd); - return 0; - } - return new MmapedBuffer(buffer, adjSize, fd, adjOffset, isUpdatable); - } - - ~MmapedBuffer() { - int ret = munmap(static_cast<void *>(mBuffer - mBufferOffset), - mBufferSize + mBufferOffset); - if (ret != 0) { - AKLOGE("DICT: Failure in munmap. ret=%d errno=%d", ret, errno); - } - ret = close(mMmapFd); - if (ret != 0) { - AKLOGE("DICT: Failure in close. ret=%d errno=%d", ret, errno); - } - } - - AK_FORCE_INLINE uint8_t *getBuffer() const { - return mBuffer; - } - - AK_FORCE_INLINE int getBufferSize() const { - return mBufferSize; - } - - AK_FORCE_INLINE bool isUpdatable() const { - return mIsUpdatable; - } - - private: - AK_FORCE_INLINE MmapedBuffer(uint8_t *const buffer, const int bufferSize, const int mmapFd, - const int bufferOffset, const bool isUpdatable) - : mBuffer(buffer), mBufferSize(bufferSize), mMmapFd(mmapFd), - mBufferOffset(bufferOffset), mIsUpdatable(isUpdatable) {} - - DISALLOW_IMPLICIT_CONSTRUCTORS(MmapedBuffer); - - uint8_t *const mBuffer; - const int mBufferSize; - const int mMmapFd; - const int mBufferOffset; - const bool mIsUpdatable; -}; -} -#endif /* LATINIME_MMAPED_BUFFER_H */ |