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#include "android-base/thread_annotations.h"
// Encapsulates advisory file lock for a given field descriptor
class CAPABILITY("mutex") FileLock {
public:
FileLock(int fd);
~FileLock() = default;
// Acquires advisory file lock. This will block.
int lock() ACQUIRE();
// Releases advisory file lock.
int unlock() RELEASE();
private:
int fd_;
};
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