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src: handle last event before exiting status threads

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- Avoid 2 consecutive calls to uv_async_send when exiting the cardreader.cpp
  check status thread.
- Fix mutex unlock location in cardreader.cpp check status thread.

PR-URL: https://github.com/santigimeno/node-pcsclite/pull/46
Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>
This commit is contained in:
Florian Ramillien
2015-09-24 16:33:59 +02:00
committed by Santiago Gimeno
parent 0a3eaafb2b
commit 3800c39291
2 changed files with 29 additions and 26 deletions
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44
src/cardreader.cpp
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@@ -333,6 +333,24 @@ void CardReader::HandleReaderStatusChange(uv_async_t *handle, int status) {
AsyncResult* ar = async_baton->async_result;
if ((ar->result == SCARD_S_SUCCESS) || (ar->result == (LONG)SCARD_E_NO_READERS_AVAILABLE)) {
const unsigned argc = 3;
Local<Value> argv[argc] = {
Nan::Undefined(), // argument
Nan::New<Number>(ar->status),
Nan::CopyBuffer(reinterpret_cast<char*>(ar->atr), ar->atrlen).ToLocalChecked()
};
Nan::Callback(Nan::New(async_baton->callback)).Call(argc, argv);
} else {
Local<Value> err = Nan::Error(error_msg("SCardGetStatusChange", ar->result).c_str());
// Prepare the parameters for the callback function.
const unsigned argc = 1;
Local<Value> argv[argc] = { err };
Nan::Callback(Nan::New(async_baton->callback)).Call(argc, argv);
}
// Do exit, after throwing last events
if (ar->do_exit) {
uv_close(reinterpret_cast<uv_handle_t*>(&async_baton->async), CloseCallback); // necessary otherwise UV will block
@@ -342,23 +360,6 @@ void CardReader::HandleReaderStatusChange(uv_async_t *handle, int status) {
};
Nan::MakeCallback(async_baton->reader->handle(), "emit", 1, argv);
} else {
if (ar->result == SCARD_S_SUCCESS) {
const unsigned argc = 3;
Local<Value> argv[argc] = {
Nan::Undefined(), // argument
Nan::New<Number>(ar->status),
Nan::CopyBuffer(reinterpret_cast<char*>(ar->atr), ar->atrlen).ToLocalChecked()
};
Nan::Callback(Nan::New(async_baton->callback)).Call(argc, argv);
} else {
Local<Value> err = Nan::Error(error_msg("SCardGetStatusChange", ar->result).c_str());
// Prepare the parameters for the callback function.
const unsigned argc = 1;
Local<Value> argv[argc] = { err };
Nan::Callback(Nan::New(async_baton->callback)).Call(argc, argv);
}
}
if (reader->m_status_thread) {
@@ -392,20 +393,21 @@ void CardReader::HandlerFunction(void* arg) {
if (!keep_watching) {
reader->m_state = 2;
async_baton->async_result->do_exit = true;
}
uv_mutex_unlock(&reader->m_mutex);
async_baton->async_result->result = result;
async_baton->async_result->status = card_reader_state.dwEventState;
memcpy(async_baton->async_result->atr, card_reader_state.rgbAtr, card_reader_state.cbAtr);
async_baton->async_result->atrlen = card_reader_state.cbAtr;
uv_mutex_unlock(&reader->m_mutex);
uv_async_send(&async_baton->async);
card_reader_state.dwCurrentState = card_reader_state.dwEventState;
}
async_baton->async_result->do_exit = true;
uv_async_send(&async_baton->async);
// Exit flag set in keepwatching and handled in following uv_async_send
}
void CardReader::DoConnect(uv_work_t* req) {