Examples of EDU.oswego.cs.dl.util.concurrent.Sync.acquire()

Package EDU.oswego.cs.dl.util.concurrent

Class EDU.oswego.cs.dl.util.concurrent.Sync

Examples of EDU.oswego.cs.dl.util.concurrent.Sync.acquire()

EDU.oswego.cs.dl.util.concurrent.Sync.acquire()
Wait (possibly forever) until successful passage. Fail only upon interuption. Interruptions always result in `clean' failures. On failure, you can be sure that it has not been acquired, and that no corresponding release should be performed. Conversely, a normal return guarantees that the acquire was successful.

        // - the current thread does not hold a write lock
        for (;;) {
            Sync signal;
            // make sure writer state does not change
            Sync shared = writerStateRWLock.readLock();
            shared.acquire();
            try {
                if (activeWriter == null
                        || !hasDependency(activeWriter.changes, id)) {
                    readLockMap.addLock(id);
                    return new ReadLockImpl(id);

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            throws InterruptedException {
        for (;;) {
            Sync signal;
            // we want to become the current writer
            Sync exclusive = writerStateRWLock.writeLock();
            exclusive.acquire();
            try {
                if (activeWriter == null
                        && !readLockMap.hasDependency(changeLog)) {
                    activeWriter = new WriteLockImpl(changeLog);
                    activeWriterId = getCurrentThreadId();

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        public void release() {
            Sync exclusive = writerStateRWLock.writeLock();
            for (;;) {
                try {
                    exclusive.acquire();
                    break;
                } catch (InterruptedException e) {
                    // try again
                    Thread.interrupted();
                }

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        public ReadLock downgrade() {
            readLockMap.addLock(null);
            Sync exclusive = writerStateRWLock.writeLock();
            for (;;) {
                try {
                    exclusive.acquire();
                    break;
                } catch (InterruptedException e) {
                    // try again
                    Thread.interrupted();
                }

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        public void release() {
            Sync shared = writerStateRWLock.readLock();
            for (;;) {
                try {
                    shared.acquire();
                    break;
                } catch (InterruptedException e) {
                    // try again
                    Thread.interrupted();
                }

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        // - the current thread does not hold a write lock
        for (;;) {
            Sync signal;
            // make sure writer state does not change
            Sync shared = writerStateRWLock.readLock();
            shared.acquire();
            try {
                if (activeWriter == null
                        || !hasDependency(activeWriter.changes, id)) {
                    readLockMap.addLock(id);
                    return new ReadLockImpl(id);

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            throws InterruptedException {
        for (;;) {
            Sync signal;
            // we want to become the current writer
            Sync exclusive = writerStateRWLock.writeLock();
            exclusive.acquire();
            try {
                if (activeWriter == null
                        && !readLockMap.hasDependency(changeLog)) {
                    activeWriter = new WriteLockImpl(changeLog);
                    activeWriterThread = Thread.currentThread();

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        public void release() {
            Sync exclusive = writerStateRWLock.writeLock();
            for (;;) {
                try {
                    exclusive.acquire();
                    break;
                } catch (InterruptedException e) {
                    // try again
                    Thread.interrupted();
                }

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        public ReadLock downgrade() {
            readLockMap.addLock(null);
            Sync exclusive = writerStateRWLock.writeLock();
            for (;;) {
                try {
                    exclusive.acquire();
                    break;
                } catch (InterruptedException e) {
                    // try again
                    Thread.interrupted();
                }

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        public void release() {
            Sync shared = writerStateRWLock.readLock();
            for (;;) {
                try {
                    shared.acquire();
                    break;
                } catch (InterruptedException e) {
                    // try again
                    Thread.interrupted();
                }

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