From 873ad1272efca634eb1e3ccc53e1ede79022d66c Mon Sep 17 00:00:00 2001
From: ameerj <52414509+ameerj@users.noreply.github.com>
Date: Fri, 18 Dec 2020 00:12:14 -0500
Subject: [PATCH] buffer_queue: better use of std::array
---
.../hle/service/nvflinger/buffer_queue.cpp | 105 ++++++++----------
1 file changed, 46 insertions(+), 59 deletions(-)
diff --git a/src/core/hle/service/nvflinger/buffer_queue.cpp b/src/core/hle/service/nvflinger/buffer_queue.cpp
index 101b004926..377f47e8ef 100644
--- a/src/core/hle/service/nvflinger/buffer_queue.cpp
+++ b/src/core/hle/service/nvflinger/buffer_queue.cpp
@@ -22,6 +22,7 @@ BufferQueue::BufferQueue(Kernel::KernelCore& kernel, u32 id, u64 layer_id)
BufferQueue::~BufferQueue() = default;
void BufferQueue::SetPreallocatedBuffer(u32 slot, const IGBPBuffer& igbp_buffer) {
+ ASSERT(slot < buffer_slots);
LOG_WARNING(Service, "Adding graphics buffer {}", slot);
free_buffers.push_back(slot);
@@ -44,73 +45,57 @@ std::optional<std::pair<u32, Service::Nvidia::MultiFence*>> BufferQueue::Dequeue
if (free_buffers.empty()) {
return std::nullopt;
}
-
auto f_itr = free_buffers.begin();
- auto itr = buffers.end();
+ auto slot = buffers.size();
while (f_itr != free_buffers.end()) {
- auto slot = *f_itr;
- itr = std::find_if(buffers.begin(), buffers.end(), [&](const Buffer& buffer) {
- // Only consider free buffers. Buffers become free once again after they've been
- // Acquired and Released by the compositor, see the NVFlinger::Compose method.
- if (buffer.status != Buffer::Status::Free) {
- return false;
- }
-
- if (buffer.slot != slot) {
- return false;
- }
-
- // Make sure that the parameters match.
- return buffer.igbp_buffer.width == width && buffer.igbp_buffer.height == height;
- });
-
- if (itr != buffers.end()) {
+ const Buffer& buffer = buffers[*f_itr];
+ if (buffer.status == Buffer::Status::Free && buffer.igbp_buffer.width == width &&
+ buffer.igbp_buffer.height == height) {
+ slot = *f_itr;
free_buffers.erase(f_itr);
break;
}
++f_itr;
}
-
- if (itr == buffers.end()) {
+ if (slot == buffers.size()) {
return std::nullopt;
}
-
- itr->status = Buffer::Status::Dequeued;
- return {{itr->slot, &itr->multi_fence}};
+ buffers[slot].status = Buffer::Status::Dequeued;
+ return {{buffers[slot].slot, &buffers[slot].multi_fence}};
}
const IGBPBuffer& BufferQueue::RequestBuffer(u32 slot) const {
- auto itr = std::find_if(buffers.begin(), buffers.end(),
- [&](const Buffer& buffer) { return buffer.slot == slot; });
- ASSERT(itr != buffers.end());
- ASSERT(itr->status == Buffer::Status::Dequeued);
- return itr->igbp_buffer;
+ ASSERT(slot < buffers.size());
+ ASSERT(buffers[slot].status == Buffer::Status::Dequeued);
+ ASSERT(buffers[slot].slot == slot);
+
+ return buffers[slot].igbp_buffer;
}
void BufferQueue::QueueBuffer(u32 slot, BufferTransformFlags transform,
const Common::Rectangle<int>& crop_rect, u32 swap_interval,
Service::Nvidia::MultiFence& multi_fence) {
- auto itr = std::find_if(buffers.begin(), buffers.end(),
- [&](const Buffer& buffer) { return buffer.slot == slot; });
- ASSERT(itr != buffers.end());
- ASSERT(itr->status == Buffer::Status::Dequeued);
- itr->status = Buffer::Status::Queued;
- itr->transform = transform;
- itr->crop_rect = crop_rect;
- itr->swap_interval = swap_interval;
- itr->multi_fence = multi_fence;
+ ASSERT(slot < buffers.size());
+ ASSERT(buffers[slot].status == Buffer::Status::Dequeued);
+ ASSERT(buffers[slot].slot == slot);
+
+ buffers[slot].status = Buffer::Status::Queued;
+ buffers[slot].transform = transform;
+ buffers[slot].crop_rect = crop_rect;
+ buffers[slot].swap_interval = swap_interval;
+ buffers[slot].multi_fence = multi_fence;
queue_sequence.push_back(slot);
}
void BufferQueue::CancelBuffer(u32 slot, const Service::Nvidia::MultiFence& multi_fence) {
- const auto itr = std::find_if(buffers.begin(), buffers.end(),
- [slot](const Buffer& buffer) { return buffer.slot == slot; });
- ASSERT(itr != buffers.end());
- ASSERT(itr->status != Buffer::Status::Free);
- itr->status = Buffer::Status::Free;
- itr->multi_fence = multi_fence;
- itr->swap_interval = 0;
+ ASSERT(slot < buffers.size());
+ ASSERT(buffers[slot].status != Buffer::Status::Free);
+ ASSERT(buffers[slot].slot == slot);
+
+ buffers[slot].status = Buffer::Status::Free;
+ buffers[slot].multi_fence = multi_fence;
+ buffers[slot].swap_interval = 0;
free_buffers.push_back(slot);
@@ -118,28 +103,30 @@ void BufferQueue::CancelBuffer(u32 slot, const Service::Nvidia::MultiFence& mult
}
std::optional<std::reference_wrapper<const BufferQueue::Buffer>> BufferQueue::AcquireBuffer() {
- auto itr = buffers.end();
+ std::size_t buffer_slot = buffers.size();
// Iterate to find a queued buffer matching the requested slot.
- while (itr == buffers.end() && !queue_sequence.empty()) {
- const u32 slot = queue_sequence.front();
- itr = std::find_if(buffers.begin(), buffers.end(), [&slot](const Buffer& buffer) {
- return buffer.status == Buffer::Status::Queued && buffer.slot == slot;
- });
+ while (buffer_slot == buffers.size() && !queue_sequence.empty()) {
+ const auto slot = static_cast<std::size_t>(queue_sequence.front());
+ ASSERT(slot < buffers.size());
+ if (buffers[slot].status == Buffer::Status::Queued) {
+ ASSERT(buffers[slot].slot == slot);
+ buffer_slot = slot;
+ }
queue_sequence.pop_front();
}
- if (itr == buffers.end()) {
+ if (buffer_slot == buffers.size()) {
return std::nullopt;
}
- itr->status = Buffer::Status::Acquired;
- return *itr;
+ buffers[buffer_slot].status = Buffer::Status::Acquired;
+ return {{buffers[buffer_slot]}};
}
void BufferQueue::ReleaseBuffer(u32 slot) {
- auto itr = std::find_if(buffers.begin(), buffers.end(),
- [&](const Buffer& buffer) { return buffer.slot == slot; });
- ASSERT(itr != buffers.end());
- ASSERT(itr->status == Buffer::Status::Acquired);
- itr->status = Buffer::Status::Free;
+ ASSERT(slot < buffers.size());
+ ASSERT(buffers[slot].status == Buffer::Status::Acquired);
+ ASSERT(buffers[slot].slot == slot);
+
+ buffers[slot].status = Buffer::Status::Free;
free_buffers.push_back(slot);
buffer_wait_event.writable->Signal();