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84 lines
1.8 KiB
C++
84 lines
1.8 KiB
C++
/* Copyright (C) 2019 MariaDB Corporation
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; version 2 of
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the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#pragma once
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#include <string>
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namespace storagemanager
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{
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class IOCoordinator;
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// a few utility classes we've coded here and there, now de-duped and centralized.
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// modify as necessary.
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struct ScopedFileLock
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{
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ScopedFileLock(IOCoordinator* i, const std::string& k);
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virtual ~ScopedFileLock();
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virtual void lock() = 0;
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virtual void unlock() = 0;
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IOCoordinator* ioc;
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bool locked;
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const std::string key;
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};
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struct ScopedReadLock : public ScopedFileLock
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{
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ScopedReadLock(IOCoordinator* i, const std::string& k);
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~ScopedReadLock() override;
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void lock() override;
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void unlock() override;
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};
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struct ScopedWriteLock : public ScopedFileLock
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{
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ScopedWriteLock(IOCoordinator* i, const std::string& k);
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~ScopedWriteLock() override;
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void lock() override;
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void unlock() override;
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};
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struct ScopedCloser
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{
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ScopedCloser();
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explicit ScopedCloser(int f);
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~ScopedCloser();
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int fd;
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};
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class SharedCloser
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{
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public:
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SharedCloser(int f);
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SharedCloser(const SharedCloser&);
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~SharedCloser();
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private:
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struct CtrlBlock
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{
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int fd;
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uint refCount;
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};
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CtrlBlock* block;
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};
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} // namespace storagemanager
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