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service/nvflinger,service/vi: Handle failure cases with exposed API

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Converts many of the Find* functions to return a std::optional<T> as
opposed to returning the raw return values directly. This allows
removing a few assertions and handles error cases like the service
itself does.
This commit is contained in:
Lioncash 2019-02-05 16:20:04 -05:00
parent 7320c667df
commit ef073ff117
4 changed files with 133 additions and 47 deletions
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90
src/core/hle/service/nvflinger/nvflinger.cpp
View file

@ -46,7 +46,7 @@ void NVFlinger::SetNVDrvInstance(std::shared_ptr<Nvidia::Module> instance) {
nvdrv = std::move(instance);
}
u64 NVFlinger::OpenDisplay(std::string_view name) {
std::optional<u64> NVFlinger::OpenDisplay(std::string_view name) {
LOG_DEBUG(Service, "Opening \"{}\" display", name);
// TODO(Subv): Currently we only support the Default display.
@ -54,32 +54,48 @@ u64 NVFlinger::OpenDisplay(std::string_view name) {
const auto itr = std::find_if(displays.begin(), displays.end(),
[&](const Display& display) { return display.name == name; });
ASSERT(itr != displays.end());
if (itr == displays.end()) {
return {};
}
return itr->id;
}
u64 NVFlinger::CreateLayer(u64 display_id) {
auto& display = FindDisplay(display_id);
std::optional<u64> NVFlinger::CreateLayer(u64 display_id) {
auto* const display = FindDisplay(display_id);
ASSERT_MSG(display.layers.empty(), "Only one layer is supported per display at the moment");
if (display == nullptr) {
return {};
}
ASSERT_MSG(display->layers.empty(), "Only one layer is supported per display at the moment");
const u64 layer_id = next_layer_id++;
const u32 buffer_queue_id = next_buffer_queue_id++;
auto buffer_queue = std::make_shared<BufferQueue>(buffer_queue_id, layer_id);
display.layers.emplace_back(layer_id, buffer_queue);
display->layers.emplace_back(layer_id, buffer_queue);
buffer_queues.emplace_back(std::move(buffer_queue));
return layer_id;
}
u32 NVFlinger::FindBufferQueueId(u64 display_id, u64 layer_id) const {
const auto& layer = FindLayer(display_id, layer_id);
return layer.buffer_queue->GetId();
std::optional<u32> NVFlinger::FindBufferQueueId(u64 display_id, u64 layer_id) const {
const auto* const layer = FindLayer(display_id, layer_id);
if (layer == nullptr) {
return {};
}
return layer->buffer_queue->GetId();
}
Kernel::SharedPtr<Kernel::ReadableEvent> NVFlinger::FindVsyncEvent(u64 display_id) const {
return FindDisplay(display_id).vsync_event.readable;
auto* const display = FindDisplay(display_id);
if (display == nullptr) {
return nullptr;
}
return display->vsync_event.readable;
}
std::shared_ptr<BufferQueue> NVFlinger::FindBufferQueue(u32 id) const {
@ -90,40 +106,60 @@ std::shared_ptr<BufferQueue> NVFlinger::FindBufferQueue(u32 id) const {
return *itr;
}
Display& NVFlinger::FindDisplay(u64 display_id) {
Display* NVFlinger::FindDisplay(u64 display_id) {
const auto itr = std::find_if(displays.begin(), displays.end(),
[&](const Display& display) { return display.id == display_id; });
ASSERT(itr != displays.end());
return *itr;
if (itr == displays.end()) {
return nullptr;
}
return &*itr;
}
const Display& NVFlinger::FindDisplay(u64 display_id) const {
const Display* NVFlinger::FindDisplay(u64 display_id) const {
const auto itr = std::find_if(displays.begin(), displays.end(),
[&](const Display& display) { return display.id == display_id; });
ASSERT(itr != displays.end());
return *itr;
if (itr == displays.end()) {
return nullptr;
}
return &*itr;
}
Layer& NVFlinger::FindLayer(u64 display_id, u64 layer_id) {
auto& display = FindDisplay(display_id);
Layer* NVFlinger::FindLayer(u64 display_id, u64 layer_id) {
auto* const display = FindDisplay(display_id);
const auto itr = std::find_if(display.layers.begin(), display.layers.end(),
if (display == nullptr) {
return nullptr;
}
const auto itr = std::find_if(display->layers.begin(), display->layers.end(),
[&](const Layer& layer) { return layer.id == layer_id; });
ASSERT(itr != display.layers.end());
return *itr;
if (itr == display->layers.end()) {
return nullptr;
}
return &*itr;
}
const Layer& NVFlinger::FindLayer(u64 display_id, u64 layer_id) const {
const auto& display = FindDisplay(display_id);
const Layer* NVFlinger::FindLayer(u64 display_id, u64 layer_id) const {
const auto* const display = FindDisplay(display_id);
const auto itr = std::find_if(display.layers.begin(), display.layers.end(),
if (display == nullptr) {
return nullptr;
}
const auto itr = std::find_if(display->layers.begin(), display->layers.end(),
[&](const Layer& layer) { return layer.id == layer_id; });
ASSERT(itr != display.layers.end());
return *itr;
if (itr == display->layers.end()) {
return nullptr;
}
return &*itr;
}
void NVFlinger::Compose() {

23
src/core/hle/service/nvflinger/nvflinger.h
View file

@ -6,6 +6,7 @@
#include <array>
#include <memory>
#include <optional>
#include <string>
#include <string_view>
#include <vector>
@ -58,15 +59,23 @@ public:
void SetNVDrvInstance(std::shared_ptr<Nvidia::Module> instance);
/// Opens the specified display and returns the ID.
u64 OpenDisplay(std::string_view name);
///
/// If an invalid display name is provided, then an empty optional is returned.
std::optional<u64> OpenDisplay(std::string_view name);
/// Creates a layer on the specified display and returns the layer ID.
u64 CreateLayer(u64 display_id);
///
/// If an invalid display ID is specified, then an empty optional is returned.
std::optional<u64> CreateLayer(u64 display_id);
/// Finds the buffer queue ID of the specified layer in the specified display.
u32 FindBufferQueueId(u64 display_id, u64 layer_id) const;
///
/// If an invalid display ID or layer ID is provided, then an empty optional is returned.
std::optional<u32> FindBufferQueueId(u64 display_id, u64 layer_id) const;
/// Gets the vsync event for the specified display.
///
/// If an invalid display ID is provided, then nullptr is returned.
Kernel::SharedPtr<Kernel::ReadableEvent> FindVsyncEvent(u64 display_id) const;
/// Obtains a buffer queue identified by the ID.
@ -78,16 +87,16 @@ public:
private:
/// Finds the display identified by the specified ID.
Display& FindDisplay(u64 display_id);
Display* FindDisplay(u64 display_id);
/// Finds the display identified by the specified ID.
const Display& FindDisplay(u64 display_id) const;
const Display* FindDisplay(u64 display_id) const;
/// Finds the layer identified by the specified ID in the desired display.
Layer& FindLayer(u64 display_id, u64 layer_id);
Layer* FindLayer(u64 display_id, u64 layer_id);
/// Finds the layer identified by the specified ID in the desired display.
const Layer& FindLayer(u64 display_id, u64 layer_id) const;
const Layer* FindLayer(u64 display_id, u64 layer_id) const;
std::shared_ptr<Nvidia::Module> nvdrv;