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EnvFlags.java
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/*-
* #%L
* LmdbJava
* %%
* Copyright (C) 2016 - 2019 The LmdbJava 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.
* #L%
*/
package org.lmdbjava;
/**
* Flags for use when opening the {@link Env}.
*/
public enum EnvFlags implements MaskedFlag {
/**
* Mmap at a fixed address (experimental).
*/
/**
* Mmap at a fixed address (experimental).
*/
MDB_FIXEDMAP(0x01),
/**
* No environment directory.
*/
MDB_NOSUBDIR(0x4000),
/**
* Don't fsync after commit.
*/
MDB_NOSYNC(0x1_0000),
/**
* Read only.
*/
MDB_RDONLY_ENV(0x2_0000),
/**
* Don't fsync metapage after commit.
*/
MDB_NOMETASYNC(0x4_0000),
/**
* Use writable mmap.
*/
MDB_WRITEMAP(0x8_0000),
/**
* Use asynchronous msync when {@link #MDB_WRITEMAP} is used.
*/
MDB_MAPASYNC(0x10_0000),
/**
* Tie reader locktable slots to {@link Txn} objects instead of to threads.
*/
MDB_NOTLS(0x20_0000),
/**
* Don't do any locking, caller must manage their own locks.
*/
MDB_NOLOCK(0x40_0000),
/**
* Don't do readahead (no effect on Windows).
*/
MDB_NORDAHEAD(0x80_0000),
/**
* Don't initialize malloc'd memory before writing to datafile.
*/
MDB_NOMEMINIT(0x100_0000);
private final int mask;
EnvFlags(final int mask) {
this.mask = mask;
}
@Override
public int getMask() {
return mask;
}
}