Method lock

app/src/main/java/androidx/room/CopyLock.java:78–88

Attempts to grab the lock, blocking if already held by another thread or process.

()

     * Attempts to grab the lock, blocking if already held by another thread or process.
     */
    public void lock() {
        mThreadLock.lock();
        if (mFileLevelLock) {
            try {
                mLockChannel = new FileOutputStream(mCopyLockFile).getChannel();
                mLockChannel.lock();
            } catch (IOException e) {
                throw new IllegalStateException("Unable to grab copy lock.", e);
            }
        }
    }

    /**
     * Releases the lock.