Function Java_java_nio_channels_SocketChannel_natRead

classpath/java-nio.cpp:498–539

}

extern "C" JNIEXPORT jint JNICALL
    Java_java_nio_channels_SocketChannel_natRead(JNIEnv* e,
                                                 jclass,
                                                 jint socket,
                                                 jbyteArray buffer,
                                                 jint offset,
                                                 jint length,
                                                 jboolean blocking)
{
  int r;
  if (blocking) {
    uint8_t* buf = static_cast<uint8_t*>(allocate(e, length));
    if (buf) {
      r = ::doRead(socket, buf, length);
      if (r > 0) {
        e->SetByteArrayRegion(buffer, offset, r, reinterpret_cast<jbyte*>(buf));
      }
      free(buf);
    } else {
      return 0;
    }
  } else {
    jboolean isCopy;
    uint8_t* buf
        = static_cast<uint8_t*>(e->GetPrimitiveArrayCritical(buffer, &isCopy));

    r = ::doRead(socket, buf + offset, length);

    e->ReleasePrimitiveArrayCritical(buffer, buf, 0);
  }

  if (r < 0) {
    if (eagain()) {
      return 0;
    } else {
      throwIOException(e);
    }
  } else if (r == 0) {
    return -1;
  }
  return r;
}

extern "C" JNIEXPORT jint JNICALL
    Java_java_nio_channels_DatagramChannel_receive(JNIEnv* e,