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framework/semaphore_pool.h

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+/* Copyright (c) 2019-2025, Arm Limited and Contributors
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 the "License";
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include "common/helpers.h"
+#include "common/vk_common.h"
+
+namespace vkb
+{
+namespace core
+{
+template <vkb::BindingType bindingType>
+class Device;
+using DeviceC = Device<vkb::BindingType::C>;
+}        // namespace core
+
+class SemaphorePool
+{
+  public:
+	SemaphorePool(vkb::core::DeviceC &device);
+
+	SemaphorePool(const SemaphorePool &) = delete;
+
+	SemaphorePool(SemaphorePool &&other) = delete;
+
+	~SemaphorePool();
+
+	SemaphorePool &operator=(const SemaphorePool &) = delete;
+
+	SemaphorePool &operator=(SemaphorePool &&) = delete;
+
+	VkSemaphore request_semaphore();
+	VkSemaphore request_semaphore_with_ownership();
+	void        release_owned_semaphore(VkSemaphore semaphore);
+
+	void reset();
+
+	uint32_t get_active_semaphore_count() const;
+
+  private:
+	vkb::core::DeviceC &device;
+
+	std::vector<VkSemaphore> semaphores;
+	std::vector<VkSemaphore> released_semaphores;
+
+	uint32_t active_semaphore_count{0};
+};
+}        // namespace vkb