T Dequeue() { // it returns false if there is nothing to deque.
while (1) {
const Node* const first = m_Head;
const Node* const last = m_Tail;
const Node* const next = first->m_Next;
if (first != m_Head) { continue; }
if (first == last) {
if (next == nullptr) {
while (m_Head->m_Next == nullptr) {
usleep(1);
}
continue;
//return false;
}
compare_and_set(&m_Tail, last, next);
}
else {
T result = next->mValue;
if (compare_and_set(&m_Head, first, next)) {
delete first;
return result;
}
}
}
}
void Enqueue(const T& v) {
const Node* const node = new Node(v);
while (1) {
const Node* const last = m_Tail;
const Node* const next = last->m_Next;
if (last != m_Tail) { continue; }
if (next == nullptr) {
if (compare_and_set(&last->m_Next, next, node)) {
compare_and_set(&m_Tail, last, node);
++m_Size;
return;
}
}
else {
compare_and_set(&m_Tail, last, next);
}
}
}
void AudioRenderer::SetMillisecondsPerPixel(const double new_pixel_ms)
{
if (compare_and_set(pixel_ms, new_pixel_ms))
{
if (renderer)
renderer->SetMillisecondsPerPixel(pixel_ms);
ResetBlockCount();
}
}
void AudioRenderer::SetAmplitudeScale(const float _amplitude_scale)
{
if (compare_and_set(amplitude_scale, _amplitude_scale))
{
// A scaling of 0 or a negative scaling makes no sense
assert(amplitude_scale > 0);
if (renderer)
renderer->SetAmplitudeScale(amplitude_scale);
Invalidate();
}
}
void AudioRenderer::SetAudioProvider(agi::AudioProvider *const _provider)
{
if (compare_and_set(provider, _provider))
{
Invalidate();
if (renderer)
renderer->SetProvider(provider);
ResetBlockCount();
}
}
bool DequeueAndDelete() { // it destroys dequed item. but fast.
while (1) {
const Node* const first = m_Head;
const Node* const last = m_Tail;
const Node* const next = first->m_Next;
if (first != m_Head) { continue; }
if (first == last) {
if (next == nullptr) {
return false;
}
compare_and_set(&m_Tail, last, next);
}
else {
if (compare_and_set(&m_Head, first, next)) {
delete first;
return true;
}
}
}
}
void AudioRenderer::SetRenderer(AudioRendererBitmapProvider *const _renderer)
{
if (compare_and_set(renderer, _renderer))
{
Invalidate();
if (renderer)
{
renderer->SetProvider(provider);
renderer->SetAmplitudeScale(amplitude_scale);
renderer->SetMillisecondsPerPixel(pixel_ms);
}
}
}
void AudioRenderer::SetHeight(const int _pixel_height)
{
if (compare_and_set(pixel_height, _pixel_height))
Invalidate();
}
void AudioRendererBitmapProvider::SetAmplitudeScale(const float _amplitude_scale)
{
if (compare_and_set(amplitude_scale, _amplitude_scale))
OnSetAmplitudeScale();
}
void AudioRendererBitmapProvider::SetMillisecondsPerPixel(const double new_pixel_ms)
{
if (compare_and_set(pixel_ms, new_pixel_ms))
OnSetMillisecondsPerPixel();
}
void AudioRendererBitmapProvider::SetProvider(agi::AudioProvider *const _provider)
{
if (compare_and_set(provider, _provider))
OnSetProvider();
}
