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/*
* Copyright (C) 2016 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.
*/
#include <android-base/logging.h>
#include <condition_variable>
#include <memory>
#include <mutex>
#include <queue>
#include <unistd.h>
#include "PosixAsyncIO.h"
namespace {
void read_func(struct aiocb *aiocbp) {
aiocbp->ret = TEMP_FAILURE_RETRY(pread(aiocbp->aio_fildes,
aiocbp->aio_buf, aiocbp->aio_nbytes, aiocbp->aio_offset));
if (aiocbp->ret == -1) aiocbp->error = errno;
}
void write_func(struct aiocb *aiocbp) {
aiocbp->ret = TEMP_FAILURE_RETRY(pwrite(aiocbp->aio_fildes,
aiocbp->aio_buf, aiocbp->aio_nbytes, aiocbp->aio_offset));
if (aiocbp->ret == -1) aiocbp->error = errno;
}
} // end anonymous namespace
aiocb::~aiocb() {
CHECK(!thread.joinable());
}
int aio_read(struct aiocb *aiocbp) {
aiocbp->thread = std::thread(read_func, aiocbp);
return 0;
}
int aio_write(struct aiocb *aiocbp) {
aiocbp->thread = std::thread(write_func, aiocbp);
return 0;
}
int aio_error(const struct aiocb *aiocbp) {
return aiocbp->error;
}
ssize_t aio_return(struct aiocb *aiocbp) {
return aiocbp->ret;
}
int aio_suspend(struct aiocb *aiocbp[], int n,
const struct timespec *) {
for (int i = 0; i < n; i++) {
aiocbp[i]->thread.join();
}
return 0;
}
void aio_prepare(struct aiocb *aiocbp, void* buf, size_t count, off_t offset) {
aiocbp->aio_buf = buf;
aiocbp->aio_offset = offset;
aiocbp->aio_nbytes = count;
}
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