58 lines
1.6 KiB
C
58 lines
1.6 KiB
C
/*
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* linux_kaio.h
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*
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* This source file is part of the FoundationDB open source project
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*
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* Copyright 2013-2018 Apple Inc. and the FoundationDB project authors
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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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// AIO system calls
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typedef struct io_context *io_context_t;
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enum {
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IO_CMD_PREAD = 0,
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IO_CMD_PWRITE = 1,
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IO_CMD_FSYNC = 2,
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IO_CMD_FDSYNC = 3
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};
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struct linux_iocb {
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void* data;
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uint32_t key, unused;
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uint16_t aio_lio_opcode;
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uint16_t aio_reqprio;
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uint32_t aio_fildes;
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void* buf;
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uint64_t nbytes;
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int64_t offset;
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uint64_t unused2;
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uint32_t flags;
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uint32_t eventfd;
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};
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struct linux_ioresult {
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void* data;
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linux_iocb* iocb;
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unsigned long result;
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unsigned long result2;
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};
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static int io_setup(unsigned nr_events, io_context_t *ctxp) { return syscall( __NR_io_setup, nr_events, ctxp ); }
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static int io_submit(io_context_t ctx_id, long nrstruct, linux_iocb ** iocbpp ) { return syscall( __NR_io_submit, ctx_id, nrstruct, iocbpp ); }
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static int io_getevents(io_context_t ctx_id, long min_nr, long nr, linux_ioresult *events, struct timespec * timeout ) { return syscall( __NR_io_getevents, ctx_id, min_nr, nr, events, timeout ); }
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