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3f29c30bed
Gui and Eink services refactor. Displaying frames performance optimization. Critical resources management.
75 lines
2.2 KiB
C++
75 lines
2.2 KiB
C++
// Copyright (c) 2017-2021, Mudita Sp. z.o.o. All rights reserved.
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// For licensing, see https://github.com/mudita/MuditaOS/LICENSE.md
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#pragma once
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#include "SynchronizationMechanism.hpp"
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#include <gui/Common.hpp>
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#include <gui/core/Context.hpp>
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#include <mutex.hpp>
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#include <chrono>
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#include <functional>
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#include <memory>
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#include <utility>
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#include <vector>
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namespace service::gui
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{
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class ContextPool
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{
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public:
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ContextPool(
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::gui::Size screenSize,
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std::size_t capacity,
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std::unique_ptr<SynchronizationMechanism> &&synchronization = getFreeRtosSynchronizationMechanism());
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/**
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* Peeks the context under specific id
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* @param id Context id
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* @return Context data
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*/
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[[nodiscard]] auto peekContext(int id) noexcept -> ::gui::Context *;
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/**
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* Locks the first available context
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* @return A context and its id
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*/
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[[nodiscard]] auto borrowContext() -> std::pair<int, ::gui::Context *>;
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/**
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* Locks the context
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* @param id Context id
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* @return Context data
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*/
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[[nodiscard]] auto borrowContext(int id) -> ::gui::Context *;
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/**
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* Checks whether any context is currently locked
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* @return True if any context is locked, false otherwise
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*/
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[[nodiscard]] auto isAnyContextLocked() const -> bool;
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/**
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* Makes a context (specified by its id) available again.
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* @param id Context id
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*/
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void returnContext(int id);
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private:
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using ContextIdContainer = std::vector<int>;
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[[nodiscard]] auto isAvailable() const noexcept -> bool;
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void freeContext(int contextId);
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void lockContext(int contextId);
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static void removeContextId(std::vector<int> &sequence, int contextId);
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static void addContextId(std::vector<int> &sequence, int contextId);
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std::vector<std::unique_ptr<::gui::Context>> contexts;
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ContextIdContainer lockedContextIds;
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ContextIdContainer freeContextIds;
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mutable cpp_freertos::MutexStandard mutex;
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std::unique_ptr<SynchronizationMechanism> synchronization;
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};
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} // namespace service::gui
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