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