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serialport.cpp
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serialport.cpp
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#include "serialport.h"
#ifdef WIN32
#define strcasecmp stricmp
#endif
uv_mutex_t write_queue_mutex;
ngx_queue_t write_queue;
v8::Handle<v8::Value> Open(const v8::Arguments& args) {
v8::HandleScope scope;
uv_mutex_init(&write_queue_mutex);
ngx_queue_init(&write_queue);
// path
if(!args[0]->IsString()) {
return scope.Close(v8::ThrowException(v8::Exception::TypeError(v8::String::New("First argument must be a string"))));
}
v8::String::Utf8Value path(args[0]->ToString());
// options
if(!args[1]->IsObject()) {
return scope.Close(v8::ThrowException(v8::Exception::TypeError(v8::String::New("Second argument must be an object"))));
}
v8::Local<v8::Object> options = args[1]->ToObject();
// callback
if(!args[2]->IsFunction()) {
return scope.Close(v8::ThrowException(v8::Exception::TypeError(v8::String::New("Third argument must be a function"))));
}
v8::Local<v8::Value> callback = args[2];
OpenBaton* baton = new OpenBaton();
memset(baton, 0, sizeof(OpenBaton));
strcpy(baton->path, *path);
baton->baudRate = options->Get(v8::String::New("baudRate"))->ToInt32()->Int32Value();
baton->dataBits = options->Get(v8::String::New("dataBits"))->ToInt32()->Int32Value();
baton->bufferSize = options->Get(v8::String::New("bufferSize"))->ToInt32()->Int32Value();
baton->parity = ToParityEnum(options->Get(v8::String::New("parity"))->ToString());
baton->stopBits = ToStopBitEnum(options->Get(v8::String::New("stopBits"))->ToNumber()->NumberValue());
baton->flowControl = options->Get(v8::String::New("flowControl"))->ToBoolean()->BooleanValue();
baton->callback = v8::Persistent<v8::Value>::New(callback);
baton->dataCallback = v8::Persistent<v8::Value>::New(options->Get(v8::String::New("dataCallback")));
baton->disconnectedCallback = v8::Persistent<v8::Value>::New(options->Get(v8::String::New("disconnectedCallback")));
baton->errorCallback = v8::Persistent<v8::Value>::New(options->Get(v8::String::New("errorCallback")));
uv_work_t* req = new uv_work_t();
req->data = baton;
uv_queue_work(uv_default_loop(), req, EIO_Open, EIO_AfterOpen);
return scope.Close(v8::Undefined());
}
void EIO_AfterOpen(uv_work_t* req) {
OpenBaton* data = static_cast<OpenBaton*>(req->data);
v8::Handle<v8::Value> argv[2];
if(data->errorString[0]) {
argv[0] = v8::Exception::Error(v8::String::New(data->errorString));
argv[1] = v8::Undefined();
} else {
argv[0] = v8::Undefined();
argv[1] = v8::Int32::New(data->result);
AfterOpenSuccess(data->result, data->dataCallback, data->disconnectedCallback, data->errorCallback);
}
v8::Function::Cast(*data->callback)->Call(v8::Context::GetCurrent()->Global(), 2, argv);
data->callback.Dispose();
delete data;
delete req;
}
v8::Handle<v8::Value> Write(const v8::Arguments& args) {
v8::HandleScope scope;
// file descriptor
if(!args[0]->IsInt32()) {
return scope.Close(v8::ThrowException(v8::Exception::TypeError(v8::String::New("First argument must be an int"))));
}
int fd = args[0]->ToInt32()->Int32Value();
// buffer
if(!args[1]->IsObject() || !node::Buffer::HasInstance(args[1])) {
return scope.Close(v8::ThrowException(v8::Exception::TypeError(v8::String::New("Second argument must be a buffer"))));
}
v8::Persistent<v8::Object> buffer = v8::Persistent<v8::Object>::New(args[1]->ToObject());
char* bufferData = node::Buffer::Data(buffer);
size_t bufferLength = node::Buffer::Length(buffer);
// callback
if(!args[2]->IsFunction()) {
return scope.Close(v8::ThrowException(v8::Exception::TypeError(v8::String::New("Third argument must be a function"))));
}
v8::Local<v8::Value> callback = args[2];
WriteBaton* baton = new WriteBaton();
memset(baton, 0, sizeof(WriteBaton));
baton->fd = fd;
baton->buffer = buffer;
baton->bufferData = bufferData;
baton->bufferLength = bufferLength;
baton->callback = v8::Persistent<v8::Value>::New(callback);
QueuedWrite* queuedWrite = new QueuedWrite();
memset(queuedWrite, 0, sizeof(QueuedWrite));
ngx_queue_init(&queuedWrite->queue);
queuedWrite->baton = baton;
queuedWrite->req.data = queuedWrite;
uv_mutex_lock(&write_queue_mutex);
bool empty = ngx_queue_empty(&write_queue);
ngx_queue_insert_tail(&write_queue, &queuedWrite->queue);
if (empty) {
uv_queue_work(uv_default_loop(), &queuedWrite->req, EIO_Write, EIO_AfterWrite);
}
uv_mutex_unlock(&write_queue_mutex);
return scope.Close(v8::Undefined());
}
void EIO_AfterWrite(uv_work_t* req) {
QueuedWrite* queuedWrite = static_cast<QueuedWrite*>(req->data);
WriteBaton* data = static_cast<WriteBaton*>(queuedWrite->baton);
v8::Handle<v8::Value> argv[2];
if(data->errorString[0]) {
argv[0] = v8::Exception::Error(v8::String::New(data->errorString));
argv[1] = v8::Undefined();
} else {
argv[0] = v8::Undefined();
argv[1] = v8::Int32::New(data->result);
}
v8::Function::Cast(*data->callback)->Call(v8::Context::GetCurrent()->Global(), 2, argv);
uv_mutex_lock(&write_queue_mutex);
ngx_queue_remove(&queuedWrite->queue);
if (!ngx_queue_empty(&write_queue)) {
// Always pull the next work item from the head of the queue
ngx_queue_t* head = ngx_queue_head(&write_queue);
QueuedWrite* nextQueuedWrite = ngx_queue_data(head, QueuedWrite, queue);
uv_queue_work(uv_default_loop(), &nextQueuedWrite->req, EIO_Write, EIO_AfterWrite);
}
uv_mutex_unlock(&write_queue_mutex);
data->buffer.Dispose();
data->callback.Dispose();
delete data;
delete queuedWrite;
}
v8::Handle<v8::Value> Close(const v8::Arguments& args) {
v8::HandleScope scope;
// file descriptor
if(!args[0]->IsInt32()) {
return scope.Close(v8::ThrowException(v8::Exception::TypeError(v8::String::New("First argument must be an int"))));
}
int fd = args[0]->ToInt32()->Int32Value();
// callback
if(!args[1]->IsFunction()) {
return scope.Close(v8::ThrowException(v8::Exception::TypeError(v8::String::New("Second argument must be a function"))));
}
v8::Local<v8::Value> callback = args[1];
CloseBaton* baton = new CloseBaton();
memset(baton, 0, sizeof(CloseBaton));
baton->fd = fd;
baton->callback = v8::Persistent<v8::Value>::New(callback);
uv_work_t* req = new uv_work_t();
req->data = baton;
uv_queue_work(uv_default_loop(), req, EIO_Close, EIO_AfterClose);
return scope.Close(v8::Undefined());
}
void EIO_AfterClose(uv_work_t* req) {
CloseBaton* data = static_cast<CloseBaton*>(req->data);
v8::Handle<v8::Value> argv[1];
if(data->errorString[0]) {
argv[0] = v8::Exception::Error(v8::String::New(data->errorString));
} else {
argv[0] = v8::Undefined();
}
v8::Function::Cast(*data->callback)->Call(v8::Context::GetCurrent()->Global(), 1, argv);
data->callback.Dispose();
delete data;
delete req;
}
v8::Handle<v8::Value> List(const v8::Arguments& args) {
v8::HandleScope scope;
// callback
if(!args[0]->IsFunction()) {
return scope.Close(v8::ThrowException(v8::Exception::TypeError(v8::String::New("First argument must be a function"))));
}
v8::Local<v8::Value> callback = args[0];
ListBaton* baton = new ListBaton();
strcpy(baton->errorString, "");
baton->callback = v8::Persistent<v8::Value>::New(callback);
uv_work_t* req = new uv_work_t();
req->data = baton;
uv_queue_work(uv_default_loop(), req, EIO_List, EIO_AfterList);
return scope.Close(v8::Undefined());
}
void EIO_AfterList(uv_work_t* req) {
ListBaton* data = static_cast<ListBaton*>(req->data);
v8::Handle<v8::Value> argv[2];
if(data->errorString[0]) {
argv[0] = v8::Exception::Error(v8::String::New(data->errorString));
argv[1] = v8::Undefined();
} else {
v8::Local<v8::Array> results = v8::Array::New();
int i = 0;
for(std::list<ListResultItem*>::iterator it = data->results.begin(); it != data->results.end(); it++, i++) {
v8::Local<v8::Object> item = v8::Object::New();
item->Set(v8::String::New("comName"), v8::String::New((*it)->comName.c_str()));
item->Set(v8::String::New("manufacturer"), v8::String::New((*it)->manufacturer.c_str()));
item->Set(v8::String::New("pnpId"), v8::String::New((*it)->pnpId.c_str()));
results->Set(i, item);
}
argv[0] = v8::Undefined();
argv[1] = results;
}
v8::Function::Cast(*data->callback)->Call(v8::Context::GetCurrent()->Global(), 2, argv);
data->callback.Dispose();
for(std::list<ListResultItem*>::iterator it = data->results.begin(); it != data->results.end(); it++) {
delete *it;
}
delete data;
delete req;
}
v8::Handle<v8::Value> Flush(const v8::Arguments& args) {
v8::HandleScope scope;
// file descriptor
if(!args[0]->IsInt32()) {
return scope.Close(v8::ThrowException(v8::Exception::TypeError(v8::String::New("First argument must be an int"))));
}
int fd = args[0]->ToInt32()->Int32Value();
// callback
if(!args[1]->IsFunction()) {
return scope.Close(v8::ThrowException(v8::Exception::TypeError(v8::String::New("Second argument must be a function"))));
}
v8::Local<v8::Value> callback = args[1];
FlushBaton* baton = new FlushBaton();
memset(baton, 0, sizeof(FlushBaton));
baton->fd = fd;
baton->callback = v8::Persistent<v8::Value>::New(callback);
uv_work_t* req = new uv_work_t();
req->data = baton;
uv_queue_work(uv_default_loop(), req, EIO_Flush, EIO_AfterFlush);
return scope.Close(v8::Undefined());
}
void EIO_AfterFlush(uv_work_t* req) {
FlushBaton* data = static_cast<FlushBaton*>(req->data);
v8::Handle<v8::Value> argv[2];
if(data->errorString[0]) {
argv[0] = v8::Exception::Error(v8::String::New(data->errorString));
argv[1] = v8::Undefined();
} else {
argv[0] = v8::Undefined();
argv[1] = v8::Int32::New(data->result);
}
v8::Function::Cast(*data->callback)->Call(v8::Context::GetCurrent()->Global(), 2, argv);
data->callback.Dispose();
delete data;
delete req;
}
SerialPortParity ToParityEnum(const v8::Handle<v8::String>& v8str) {
v8::String::AsciiValue str(v8str);
if(!strcasecmp(*str, "none")) {
return SERIALPORT_PARITY_NONE;
}
if(!strcasecmp(*str, "even")) {
return SERIALPORT_PARITY_EVEN;
}
if(!strcasecmp(*str, "mark")) {
return SERIALPORT_PARITY_MARK;
}
if(!strcasecmp(*str, "odd")) {
return SERIALPORT_PARITY_ODD;
}
if(!strcasecmp(*str, "space")) {
return SERIALPORT_PARITY_SPACE;
}
return SERIALPORT_PARITY_NONE;
}
SerialPortStopBits ToStopBitEnum(double stopBits) {
if(stopBits > 1.4 && stopBits < 1.6) {
return SERIALPORT_STOPBITS_ONE_FIVE;
}
if(stopBits == 2) {
return SERIALPORT_STOPBITS_TWO;
}
return SERIALPORT_STOPBITS_ONE;
}
extern "C" {
void init (v8::Handle<v8::Object> target)
{
v8::HandleScope scope;
NODE_SET_METHOD(target, "open", Open);
NODE_SET_METHOD(target, "write", Write);
NODE_SET_METHOD(target, "close", Close);
NODE_SET_METHOD(target, "list", List);
NODE_SET_METHOD(target, "flush", Flush);
}
}
NODE_MODULE(serialport, init);