node-usb/src/node_usb.cc at master · code0100fun/node-usb · GitHub

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#include "node_usb.h"

ProtoBuilder::ProtoList ProtoBuilder::initProto;

NAN_METHOD(SetDebugLevel);

NAN_METHOD(GetDeviceList);

void initConstants(Handle<Object> target);

libusb_context* usb_context;

#ifdef USE_POLL

#include <poll.h>

#include <sys/time.h>

std::map<int, uv_poll_t*> pollByFD;

struct timeval zero_tv = {0, 0};

void onPollSuccess(uv_poll_t* handle, int status, int events){

libusb_handle_events_timeout(usb_context, &zero_tv);

}

void LIBUSB_CALL onPollFDAdded(int fd, short events, void *user_data){

uv_poll_t *poll_fd;

auto it = pollByFD.find(fd);

if (it != pollByFD.end()){

poll_fd = it->second;

}else{

poll_fd = (uv_poll_t*) malloc(sizeof(uv_poll_t));

uv_poll_init(uv_default_loop(), poll_fd, fd);

pollByFD.insert(std::make_pair(fd, poll_fd));

}

DEBUG_LOG("Added pollfd %i, %p", fd, poll_fd);

unsigned flags = ((events&POLLIN) ? UV_READABLE:0)

| ((events&POLLOUT)? UV_WRITABLE:0);

uv_poll_start(poll_fd, flags, onPollSuccess);

}

void LIBUSB_CALL onPollFDRemoved(int fd, void *user_data){

auto it = pollByFD.find(fd);

if (it != pollByFD.end()){

DEBUG_LOG("Removed pollfd %i, %p", fd, it->second);

uv_poll_stop(it->second);

uv_close((uv_handle_t*) it->second, (uv_close_cb) free);

pollByFD.erase(it);

}

#else

uv_thread_t usb_thread;

void USBThreadFn(void*){

while(1) libusb_handle_events(usb_context);

}

#endif

extern "C" void Initialize(Handle<Object> target) {

NanScope();

// Initialize libusb. On error, halt initialization.

int res = libusb_init(&usb_context);

target->Set(NanNew<String>("INIT_ERROR"), NanNew<Number>(res));

if (res != 0) {

return;

}

#ifdef USE_POLL

assert(libusb_pollfds_handle_timeouts(usb_context));

libusb_set_pollfd_notifiers(usb_context, onPollFDAdded, onPollFDRemoved, NULL);

const struct libusb_pollfd** pollfds = libusb_get_pollfds(usb_context);

assert(pollfds);

for(const struct libusb_pollfd** i=pollfds; *i; i++){

onPollFDAdded((*i)->fd, (*i)->events, NULL);

}

free(pollfds);

#else

uv_thread_create(&usb_thread, USBThreadFn, NULL);

#endif

ProtoBuilder::initAll(target);

NODE_SET_METHOD(target, "setDebugLevel", SetDebugLevel);

NODE_SET_METHOD(target, "getDeviceList", GetDeviceList);

initConstants(target);

}

NODE_MODULE(usb_bindings, Initialize)

NAN_METHOD(SetDebugLevel) {

NanScope();

if (args.Length() != 1 || !args[0]->IsUint32() || args[0]->Uint32Value() > 4) {

THROW_BAD_ARGS("Usb::SetDebugLevel argument is invalid. [uint:[0-4]]!")

}

libusb_set_debug(usb_context, args[0]->Uint32Value());

NanReturnValue(NanUndefined());

}

NAN_METHOD(GetDeviceList) {

NanScope();

libusb_device **devs;

int cnt = libusb_get_device_list(usb_context, &devs);

CHECK_USB(cnt);

Handle<Array> arr = NanNew<Array>(cnt);

for(int i = 0; i < cnt; i++) {

arr->Set(i, Device::get(devs[i]));

}

libusb_free_device_list(devs, true);

NanReturnValue(arr);

}

void initConstants(Handle<Object> target){

NODE_DEFINE_CONSTANT(target, LIBUSB_CLASS_PER_INTERFACE);

NODE_DEFINE_CONSTANT(target, LIBUSB_CLASS_AUDIO);

NODE_DEFINE_CONSTANT(target, LIBUSB_CLASS_COMM);

NODE_DEFINE_CONSTANT(target, LIBUSB_CLASS_HID);

NODE_DEFINE_CONSTANT(target, LIBUSB_CLASS_PRINTER);

NODE_DEFINE_CONSTANT(target, LIBUSB_CLASS_PTP);

NODE_DEFINE_CONSTANT(target, LIBUSB_CLASS_MASS_STORAGE);

NODE_DEFINE_CONSTANT(target, LIBUSB_CLASS_HUB);

NODE_DEFINE_CONSTANT(target, LIBUSB_CLASS_DATA);

NODE_DEFINE_CONSTANT(target, LIBUSB_CLASS_WIRELESS);

NODE_DEFINE_CONSTANT(target, LIBUSB_CLASS_APPLICATION);

NODE_DEFINE_CONSTANT(target, LIBUSB_CLASS_VENDOR_SPEC);

// libusb_standard_request

NODE_DEFINE_CONSTANT(target, LIBUSB_REQUEST_GET_STATUS);

NODE_DEFINE_CONSTANT(target, LIBUSB_REQUEST_CLEAR_FEATURE);

NODE_DEFINE_CONSTANT(target, LIBUSB_REQUEST_SET_FEATURE);

NODE_DEFINE_CONSTANT(target, LIBUSB_REQUEST_SET_ADDRESS );

NODE_DEFINE_CONSTANT(target, LIBUSB_REQUEST_GET_DESCRIPTOR);

NODE_DEFINE_CONSTANT(target, LIBUSB_REQUEST_SET_DESCRIPTOR);

NODE_DEFINE_CONSTANT(target, LIBUSB_REQUEST_GET_CONFIGURATION);

NODE_DEFINE_CONSTANT(target, LIBUSB_REQUEST_SET_CONFIGURATION );

NODE_DEFINE_CONSTANT(target, LIBUSB_REQUEST_GET_INTERFACE);

NODE_DEFINE_CONSTANT(target, LIBUSB_REQUEST_SET_INTERFACE);

NODE_DEFINE_CONSTANT(target, LIBUSB_REQUEST_SYNCH_FRAME);

// libusb_descriptor_type

NODE_DEFINE_CONSTANT(target, LIBUSB_DT_DEVICE);

NODE_DEFINE_CONSTANT(target, LIBUSB_DT_CONFIG);

NODE_DEFINE_CONSTANT(target, LIBUSB_DT_STRING);

NODE_DEFINE_CONSTANT(target, LIBUSB_DT_INTERFACE);

NODE_DEFINE_CONSTANT(target, LIBUSB_DT_ENDPOINT);

NODE_DEFINE_CONSTANT(target, LIBUSB_DT_HID);

NODE_DEFINE_CONSTANT(target, LIBUSB_DT_REPORT);

NODE_DEFINE_CONSTANT(target, LIBUSB_DT_PHYSICAL);

NODE_DEFINE_CONSTANT(target, LIBUSB_DT_HUB);

// libusb_endpoint_direction

NODE_DEFINE_CONSTANT(target, LIBUSB_ENDPOINT_IN);

NODE_DEFINE_CONSTANT(target, LIBUSB_ENDPOINT_OUT);

// libusb_transfer_type

NODE_DEFINE_CONSTANT(target, LIBUSB_TRANSFER_TYPE_CONTROL);

NODE_DEFINE_CONSTANT(target, LIBUSB_TRANSFER_TYPE_ISOCHRONOUS);

NODE_DEFINE_CONSTANT(target, LIBUSB_TRANSFER_TYPE_BULK);

NODE_DEFINE_CONSTANT(target, LIBUSB_TRANSFER_TYPE_INTERRUPT);

// libusb_iso_sync_type

NODE_DEFINE_CONSTANT(target, LIBUSB_ISO_SYNC_TYPE_NONE);

NODE_DEFINE_CONSTANT(target, LIBUSB_ISO_SYNC_TYPE_ASYNC);

NODE_DEFINE_CONSTANT(target, LIBUSB_ISO_SYNC_TYPE_ADAPTIVE);

NODE_DEFINE_CONSTANT(target, LIBUSB_ISO_SYNC_TYPE_SYNC);

// libusb_iso_usage_type

NODE_DEFINE_CONSTANT(target, LIBUSB_ISO_USAGE_TYPE_DATA);

NODE_DEFINE_CONSTANT(target, LIBUSB_ISO_USAGE_TYPE_FEEDBACK);

NODE_DEFINE_CONSTANT(target, LIBUSB_ISO_USAGE_TYPE_IMPLICIT);

// libusb_transfer_status

NODE_DEFINE_CONSTANT(target, LIBUSB_TRANSFER_COMPLETED);

NODE_DEFINE_CONSTANT(target, LIBUSB_TRANSFER_ERROR);

NODE_DEFINE_CONSTANT(target, LIBUSB_TRANSFER_TIMED_OUT);

NODE_DEFINE_CONSTANT(target, LIBUSB_TRANSFER_CANCELLED);

NODE_DEFINE_CONSTANT(target, LIBUSB_TRANSFER_STALL);

NODE_DEFINE_CONSTANT(target, LIBUSB_TRANSFER_NO_DEVICE);

NODE_DEFINE_CONSTANT(target, LIBUSB_TRANSFER_OVERFLOW);

// libusb_transfer_flags

NODE_DEFINE_CONSTANT(target, LIBUSB_TRANSFER_SHORT_NOT_OK);

NODE_DEFINE_CONSTANT(target, LIBUSB_TRANSFER_FREE_BUFFER);

NODE_DEFINE_CONSTANT(target, LIBUSB_TRANSFER_FREE_TRANSFER);

// libusb_request_type

NODE_DEFINE_CONSTANT(target, LIBUSB_REQUEST_TYPE_STANDARD);

NODE_DEFINE_CONSTANT(target, LIBUSB_REQUEST_TYPE_CLASS);

NODE_DEFINE_CONSTANT(target, LIBUSB_REQUEST_TYPE_VENDOR);

NODE_DEFINE_CONSTANT(target, LIBUSB_REQUEST_TYPE_RESERVED);

// libusb_request_recipient

NODE_DEFINE_CONSTANT(target, LIBUSB_RECIPIENT_DEVICE);

NODE_DEFINE_CONSTANT(target, LIBUSB_RECIPIENT_INTERFACE);

NODE_DEFINE_CONSTANT(target, LIBUSB_RECIPIENT_ENDPOINT);

NODE_DEFINE_CONSTANT(target, LIBUSB_RECIPIENT_OTHER);

NODE_DEFINE_CONSTANT(target, LIBUSB_CONTROL_SETUP_SIZE);

}

Local<Value> libusbException(int errorno) {

const char* err = libusb_error_name(errorno);

Local<Value> e = NanError(err);

e->ToObject()->Set(NanNew<String>("errno"), NanNew<Integer>(errorno));

return e;

}

node-usb/src/node_usb.cc at master · code0100fun/node-usb · GitHub

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