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// SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include <optional>
#include "video_core/renderer_vulkan/vk_master_semaphore.h"
#include "video_core/renderer_vulkan/vk_resource_pool.h"
namespace Vulkan {
ResourcePool::ResourcePool(MasterSemaphore& master_semaphore_, size_t grow_step_)
: master_semaphore{&master_semaphore_}, grow_step{grow_step_} {}
size_t ResourcePool::CommitResource() {
// Refresh semaphore to query updated results
master_semaphore->Refresh();
const u64 gpu_tick = master_semaphore->KnownGpuTick();
const auto search = [this, gpu_tick](size_t begin, size_t end) -> std::optional<size_t> {
for (size_t iterator = begin; iterator < end; ++iterator) {
if (gpu_tick >= ticks[iterator]) {
ticks[iterator] = master_semaphore->CurrentTick();
return iterator;
}
}
return std::nullopt;
};
// Try to find a free resource from the hinted position to the end.
std::optional<size_t> found = search(hint_iterator, ticks.size());
if (!found) {
// Search from beginning to the hinted position.
found = search(0, hint_iterator);
if (!found) {
// Both searches failed, the pool is full; handle it.
const size_t free_resource = ManageOverflow();
ticks[free_resource] = master_semaphore->CurrentTick();
found = free_resource;
}
}
// Free iterator is hinted to the resource after the one that's been committed.
hint_iterator = (*found + 1) % ticks.size();
return *found;
}
size_t ResourcePool::ManageOverflow() {
const size_t old_capacity = ticks.size();
Grow();
// The last entry is guaranteed to be free, since it's the first element of the freshly
// allocated resources.
return old_capacity;
}
void ResourcePool::Grow() {
const size_t old_capacity = ticks.size();
ticks.resize(old_capacity + grow_step);
Allocate(old_capacity, old_capacity + grow_step);
}
} // namespace Vulkan
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