@Override
public FileDescriptor open(String path, int flags, int mode) throws ErrnoException {
BlockGuard.getThreadPolicy().onReadFromDisk();
if ((mode & O_ACCMODE) != O_RDONLY) {
BlockGuard.getThreadPolicy().onWriteToDisk();
}
return os.open(path, flags, mode);
}
@Override
public int sendto(
FileDescriptor fd, ByteBuffer buffer, int flags, InetAddress inetAddress, int port)
throws ErrnoException, SocketException {
BlockGuard.getThreadPolicy().onNetwork();
return os.sendto(fd, buffer, flags, inetAddress, port);
}
@Override
public int poll(StructPollfd[] fds, int timeoutMs) throws ErrnoException {
// Greater than 0 is a timeout in milliseconds and -1 means "block forever",
// but 0 means "poll and return immediately", which shouldn't be subject to BlockGuard.
if (timeoutMs != 0) {
BlockGuard.getThreadPolicy().onNetwork();
}
return os.poll(fds, timeoutMs);
}
@Override
public int recvfrom(
FileDescriptor fd,
byte[] bytes,
int byteOffset,
int byteCount,
int flags,
InetSocketAddress srcAddress)
throws ErrnoException, SocketException {
BlockGuard.getThreadPolicy().onNetwork();
return os.recvfrom(fd, bytes, byteOffset, byteCount, flags, srcAddress);
}
@Override
public int sendto(
FileDescriptor fd,
byte[] bytes,
int byteOffset,
int byteCount,
int flags,
InetAddress inetAddress,
int port)
throws ErrnoException, SocketException {
// We permit datagrams without hostname lookups.
if (inetAddress != null) {
BlockGuard.getThreadPolicy().onNetwork();
}
return os.sendto(fd, bytes, byteOffset, byteCount, flags, inetAddress, port);
}
@Override
public void close(FileDescriptor fd) throws ErrnoException {
try {
if (S_ISSOCK(Libcore.os.fstat(fd).st_mode)) {
if (isLingerSocket(fd)) {
// If the fd is a socket with SO_LINGER set, we might block indefinitely.
// We allow non-linger sockets so that apps can close their network
// connections in methods like onDestroy which will run on the UI thread.
BlockGuard.getThreadPolicy().onNetwork();
}
untagSocket(fd);
}
} catch (ErrnoException ignored) {
// We're called via Socket.close (which doesn't ask for us to be called), so we
// must not throw here, because Socket.close must not throw if asked to close an
// already-closed socket. Also, the passed-in FileDescriptor isn't necessarily
// a socket at all.
}
os.close(fd);
}
@Override
public void fsync(FileDescriptor fd) throws ErrnoException {
BlockGuard.getThreadPolicy().onWriteToDisk();
os.fsync(fd);
}
@Override
public void connect(FileDescriptor fd, InetAddress address, int port)
throws ErrnoException, SocketException {
BlockGuard.getThreadPolicy().onNetwork();
os.connect(fd, address, port);
}
@Override
public FileDescriptor accept(FileDescriptor fd, InetSocketAddress peerAddress)
throws ErrnoException, SocketException {
BlockGuard.getThreadPolicy().onNetwork();
return tagSocket(os.accept(fd, peerAddress));
}
@Override
public int writev(FileDescriptor fd, Object[] buffers, int[] offsets, int[] byteCounts)
throws ErrnoException {
BlockGuard.getThreadPolicy().onWriteToDisk();
return os.writev(fd, buffers, offsets, byteCounts);
}
@Override
public int write(FileDescriptor fd, byte[] bytes, int byteOffset, int byteCount)
throws ErrnoException {
BlockGuard.getThreadPolicy().onWriteToDisk();
return os.write(fd, bytes, byteOffset, byteCount);
}
@Override
public int write(FileDescriptor fd, ByteBuffer buffer) throws ErrnoException {
BlockGuard.getThreadPolicy().onWriteToDisk();
return os.write(fd, buffer);
}
@Override
public int recvfrom(FileDescriptor fd, ByteBuffer buffer, int flags, InetSocketAddress srcAddress)
throws ErrnoException, SocketException {
BlockGuard.getThreadPolicy().onNetwork();
return os.recvfrom(fd, buffer, flags, srcAddress);
}
@Override
public int read(FileDescriptor fd, byte[] bytes, int byteOffset, int byteCount)
throws ErrnoException {
BlockGuard.getThreadPolicy().onReadFromDisk();
return os.read(fd, bytes, byteOffset, byteCount);
}
@Override
public int read(FileDescriptor fd, ByteBuffer buffer) throws ErrnoException {
BlockGuard.getThreadPolicy().onReadFromDisk();
return os.read(fd, buffer);
}
@Override
public void ftruncate(FileDescriptor fd, long length) throws ErrnoException {
BlockGuard.getThreadPolicy().onWriteToDisk();
os.ftruncate(fd, length);
}