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src: fix cardreader thread synchronization

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- Make sure while handling AsyncResult in HandleReaderStatusChange
  (JS thread), the AsyncResult is not overwritten in HandlerFunction
  (SCardGetStatusChange thread).
This commit is contained in:
Santiago Gimeno
2015-09-18 15:18:01 +02:00
parent 1ca9670420
commit 32d0cb0289
1 changed files with 28 additions and 19 deletions
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47
src/cardreader.cpp
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@@ -310,13 +310,13 @@ NAN_METHOD(CardReader::Close) {
} while (uv_cond_timedwait(&obj->m_cond, &obj->m_mutex, 10000000) != 0);
}
assert(uv_thread_join(&obj->m_status_thread) == 0);
obj->m_status_thread = 0;
uv_mutex_unlock(&obj->m_mutex);
uv_mutex_destroy(&obj->m_mutex);
uv_cond_destroy(&obj->m_cond);
assert(uv_thread_join(&obj->m_status_thread) == 0);
obj->m_status_thread = 0;
info.GetReturnValue().Set(Nan::New<Number>(result));
}
@@ -325,6 +325,12 @@ void CardReader::HandleReaderStatusChange(uv_async_t *handle, int status) {
Nan::HandleScope scope;
AsyncBaton* async_baton = static_cast<AsyncBaton*>(handle->data);
CardReader* reader = async_baton->reader;
if (reader->m_status_thread) {
uv_mutex_lock(&reader->m_mutex);
}
AsyncResult* ar = async_baton->async_result;
if (ar->do_exit) {
@@ -336,24 +342,27 @@ void CardReader::HandleReaderStatusChange(uv_async_t *handle, int status) {
};
Nan::MakeCallback(async_baton->reader->handle(), "emit", 1, argv);
return;
} 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 (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) {
uv_mutex_unlock(&reader->m_mutex);
}
}