Examples with NonWritableChannelException java.nio.channels.NonWritableChannelException used on opensource projects

Example 6 with NonWritableChannelException

use of java.nio.channels.NonWritableChannelException in project j2objc by google.

the class FileChannelImpl method basicLock.

private FileLock basicLock(long position, long size, boolean shared, boolean wait) throws IOException {
    int accessMode = (mode & O_ACCMODE);
    if (accessMode == O_RDONLY) {
        if (!shared) {
            throw new NonWritableChannelException();
        }
    } else if (accessMode == O_WRONLY) {
        if (shared) {
            throw new NonReadableChannelException();
        }
    }
    if (position < 0 || size < 0) {
        throw new IllegalArgumentException("position=" + position + " size=" + size);
    }
    FileLock pendingLock = new FileLockImpl(this, position, size, shared);
    addLock(pendingLock);
    StructFlock flock = new StructFlock();
    flock.l_type = (short) (shared ? F_RDLCK : F_WRLCK);
    flock.l_whence = (short) SEEK_SET;
    flock.l_start = position;
    flock.l_len = translateLockLength(size);
    boolean success = false;
    try {
        success = (Libcore.os.fcntlFlock(fd, wait ? F_SETLKW64 : F_SETLK64, flock) != -1);
    } catch (ErrnoException errnoException) {
        throw errnoException.rethrowAsIOException();
    } finally {
        if (!success) {
            removeLock(pendingLock);
        }
    }
    return success ? pendingLock : null;
}

Example 7 with NonWritableChannelException

use of java.nio.channels.NonWritableChannelException in project j2objc by google.

the class FileChannelImpl method map.

public final MappedByteBuffer map(MapMode mapMode, long position, long size) throws IOException {
    checkOpen();
    if (mapMode == null) {
        throw new NullPointerException("mapMode == null");
    }
    if (position < 0 || size < 0 || size > Integer.MAX_VALUE) {
        throw new IllegalArgumentException("position=" + position + " size=" + size);
    }
    int accessMode = (mode & O_ACCMODE);
    if (accessMode == O_RDONLY) {
        if (mapMode != MapMode.READ_ONLY) {
            throw new NonWritableChannelException();
        }
    } else if (accessMode == O_WRONLY) {
        throw new NonReadableChannelException();
    }
    if (position + size > size()) {
        // and we only care about making our backing file longer here.
        try {
            Libcore.os.ftruncate(fd, position + size);
        } catch (ErrnoException ftruncateException) {
            // continue on.
            try {
                if (S_ISREG(Libcore.os.fstat(fd).st_mode) || ftruncateException.errno != EINVAL) {
                    throw ftruncateException.rethrowAsIOException();
                }
            } catch (ErrnoException fstatException) {
                throw fstatException.rethrowAsIOException();
            }
        }
    }
    long alignment = position - position % Libcore.os.sysconf(_SC_PAGE_SIZE);
    int offset = (int) (position - alignment);
    MemoryBlock block = MemoryBlock.mmap(fd, alignment, size + offset, ChannelUtils.mapModeToInt(mapMode));
    return new DirectByteBuffer(block, (int) size, offset, (mapMode == MapMode.READ_ONLY), ChannelUtils.mapModeToInt(mapMode));
}

Example 8 with NonWritableChannelException

use of java.nio.channels.NonWritableChannelException in project XobotOS by xamarin.

the class FileChannelImpl method map.

public final MappedByteBuffer map(MapMode mapMode, long position, long size) throws IOException {
    checkOpen();
    if (mapMode == null) {
        throw new NullPointerException("mapMode == null");
    }
    if (position < 0 || size < 0 || size > Integer.MAX_VALUE) {
        throw new IllegalArgumentException("position=" + position + " size=" + size);
    }
    int accessMode = (mode & O_ACCMODE);
    if (accessMode == O_RDONLY) {
        if (mapMode != MapMode.READ_ONLY) {
            throw new NonWritableChannelException();
        }
    } else if (accessMode == O_WRONLY) {
        throw new NonReadableChannelException();
    }
    if (position + size > size()) {
        // and we only care about making our backing file longer here.
        try {
            Libcore.os.ftruncate(fd, position + size);
        } catch (ErrnoException errnoException) {
            throw errnoException.rethrowAsIOException();
        }
    }
    long alignment = position - position % Libcore.os.sysconf(_SC_PAGE_SIZE);
    int offset = (int) (position - alignment);
    MemoryBlock block = MemoryBlock.mmap(fd, alignment, size + offset, mapMode);
    return new MappedByteBufferAdapter(block, (int) size, offset, mapMode);
}

Example 9 with NonWritableChannelException

use of java.nio.channels.NonWritableChannelException in project XobotOS by xamarin.

the class FileChannelImpl method basicLock.

private FileLock basicLock(long position, long size, boolean shared, boolean wait) throws IOException {
    int accessMode = (mode & O_ACCMODE);
    if (accessMode == O_RDONLY) {
        if (!shared) {
            throw new NonWritableChannelException();
        }
    } else if (accessMode == O_WRONLY) {
        if (shared) {
            throw new NonReadableChannelException();
        }
    }
    if (position < 0 || size < 0) {
        throw new IllegalArgumentException("position=" + position + " size=" + size);
    }
    FileLock pendingLock = new FileLockImpl(this, position, size, shared);
    addLock(pendingLock);
    StructFlock flock = new StructFlock();
    flock.l_type = (short) (shared ? F_RDLCK : F_WRLCK);
    flock.l_whence = (short) SEEK_SET;
    flock.l_start = position;
    flock.l_len = translateLockLength(size);
    boolean success = false;
    try {
        success = (Libcore.os.fcntlFlock(fd, wait ? F_SETLKW64 : F_SETLK64, flock) != -1);
    } catch (ErrnoException errnoException) {
        throw errnoException.rethrowAsIOException();
    } finally {
        if (!success) {
            removeLock(pendingLock);
        }
    }
    return success ? pendingLock : null;
}

Example 10 with NonWritableChannelException

use of java.nio.channels.NonWritableChannelException in project jdk8u_jdk by JetBrains.

the class FileChannelImpl method write.

public int write(ByteBuffer src) throws IOException {
    ensureOpen();
    if (!writable)
        throw new NonWritableChannelException();
    synchronized (positionLock) {
        int n = 0;
        int ti = -1;
        try {
            begin();
            ti = threads.add();
            if (!isOpen())
                return 0;
            do {
                n = IOUtil.write(fd, src, -1, nd);
            } while ((n == IOStatus.INTERRUPTED) && isOpen());
            return IOStatus.normalize(n);
        } finally {
            threads.remove(ti);
            end(n > 0);
            assert IOStatus.check(n);
        }
    }
}