51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
/*
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* Copyright (c) 2020 Huawei Technologies Co.,Ltd.
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*
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* openGauss is licensed under Mulan PSL v2.
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* You can use this software according to the terms and conditions of the Mulan PSL v2.
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* You may obtain a copy of Mulan PSL v2 at:
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*
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* http://license.coscl.org.cn/MulanPSL2
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*
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PSL v2 for more details.
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* ---------------------------------------------------------------------------------------
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*
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* flock.h
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*
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*
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*
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* IDENTIFICATION
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* src/include/flock.h
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*
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* ---------------------------------------------------------------------------------------
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*/
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#ifndef FLOCK_H
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#define FLOCK_H
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/*
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* flock ports
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*/
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#ifndef LOCK_EX
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#undef LOCK_SH
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#undef LOCK_EX
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#undef LOCK_UN
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#undef LOCK_NB
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#define LOCK_SH 1 /* Shared lock. */
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#define LOCK_EX 2 /* Exclusive lock. */
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#define LOCK_UN 8 /* Unlock. */
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#define LOCK_NB 4 /* Don't block when locking. */
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#endif
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#define START_LOCATION 1
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#define CURRENT_LOCATION 2
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#define END_LOCATION 4
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extern int pgut_flock(int fd, int operation, int64 offset, int location, int64 len);
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#define flock pgut_flock
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#endif |