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https://github.com/openvswitch/ovs
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7446f1480b
The current callers of ovsdb_log_open() always want to lock the file if they are accessing it for read/write access. An upcoming commit will add a new caller that does not fit this model (it wants to lock the file across a wider region) and so the caller should be able to choose whether to do locking. This commit adds that ability. Also, get rid of the use of <fcntl.h> flags to choose the open mode, which has always seemed somewhat crude and which this change would make even cruder.
45 lines
1.5 KiB
C
45 lines
1.5 KiB
C
/* Copyright (c) 2009, 2010 Nicira Networks
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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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#ifndef OVSDB_LOG_H
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#define OVSDB_LOG_H 1
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#include <sys/types.h>
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#include "compiler.h"
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struct json;
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struct ovsdb_log;
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/* Access mode for opening an OVSDB log. */
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enum ovsdb_log_open_mode {
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OVSDB_LOG_READ_ONLY, /* Open existing file, read-only. */
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OVSDB_LOG_READ_WRITE, /* Open existing file, read/write. */
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OVSDB_LOG_CREATE /* Create new file, read/write. */
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};
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struct ovsdb_error *ovsdb_log_open(const char *name, enum ovsdb_log_open_mode,
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int locking, struct ovsdb_log **)
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WARN_UNUSED_RESULT;
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void ovsdb_log_close(struct ovsdb_log *);
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struct ovsdb_error *ovsdb_log_read(struct ovsdb_log *, struct json **)
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WARN_UNUSED_RESULT;
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struct ovsdb_error *ovsdb_log_write(struct ovsdb_log *, struct json *)
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WARN_UNUSED_RESULT;
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struct ovsdb_error *ovsdb_log_commit(struct ovsdb_log *)
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WARN_UNUSED_RESULT;
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#endif /* ovsdb/log.h */
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