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60 lines
1.9 KiB
60 lines
1.9 KiB
/*
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* Copyright (C) 2016 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 <asyncio/AsyncIO.h>
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#include <sys/syscall.h>
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#include <unistd.h>
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#include <cstdint>
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#include <cstring>
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int io_setup(unsigned nr, aio_context_t* ctxp) {
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return syscall(__NR_io_setup, nr, ctxp);
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}
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int io_destroy(aio_context_t ctx) {
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return syscall(__NR_io_destroy, ctx);
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}
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int io_submit(aio_context_t ctx, long nr, iocb** iocbpp) {
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return syscall(__NR_io_submit, ctx, nr, iocbpp);
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}
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int io_getevents(aio_context_t ctx, long min_nr, long max_nr, io_event* events, timespec* timeout) {
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return syscall(__NR_io_getevents, ctx, min_nr, max_nr, events, timeout);
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}
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int io_cancel(aio_context_t ctx, iocb* iocbp, io_event* result) {
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return syscall(__NR_io_cancel, ctx, iocbp, result);
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}
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void io_prep(iocb* iocb, int fd, const void* buf, uint64_t count, int64_t offset, bool read) {
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memset(iocb, 0, sizeof(*iocb));
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iocb->aio_fildes = fd;
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iocb->aio_lio_opcode = read ? IOCB_CMD_PREAD : IOCB_CMD_PWRITE;
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iocb->aio_reqprio = 0;
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iocb->aio_buf = reinterpret_cast<uint64_t>(buf);
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iocb->aio_nbytes = count;
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iocb->aio_offset = offset;
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}
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void io_prep_pread(struct iocb* iocb, int fd, void* buf, size_t count, long long offset) {
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io_prep(iocb, fd, buf, count, offset, true);
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}
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void io_prep_pwrite(struct iocb* iocb, int fd, void* buf, size_t count, long long offset) {
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io_prep(iocb, fd, buf, count, offset, false);
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}
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