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torlando-tech
ac6ceca9f8
Split T-Deck firmware from microReticulum examples/lxmf_tdeck/ into its own repo. microReticulum is consumed as a git submodule dependency pinned to feat/t-deck. All include paths updated from relative symlinks to bare includes resolved via library build flags. Both tdeck (NimBLE) and tdeck-bluedroid environments compile successfully. Licensed under AGPLv3. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
81 lines
2.1 KiB
C++
81 lines
2.1 KiB
C++
// Copyright (c) 2024 microReticulum contributors
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// SPDX-License-Identifier: MIT
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#ifndef UI_LVGL_LVGLLOCK_H
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#define UI_LVGL_LVGLLOCK_H
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#ifdef ARDUINO
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#include "LVGLInit.h"
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#include <freertos/FreeRTOS.h>
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#include <freertos/semphr.h>
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namespace UI {
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namespace LVGL {
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/**
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* RAII lock for thread-safe LVGL access
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*
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* Usage:
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* void SomeScreen::update() {
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* LVGLLock lock; // Acquires mutex
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* lv_label_set_text(label, "Hello");
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* // ... more LVGL calls ...
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* } // Mutex released when lock goes out of scope
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*
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* Or use the macro:
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* void SomeScreen::update() {
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* LVGL_LOCK();
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* lv_label_set_text(label, "Hello");
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* }
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*/
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class LVGLLock {
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public:
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LVGLLock() {
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SemaphoreHandle_t mutex = LVGLInit::get_mutex();
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if (mutex) {
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#ifndef NDEBUG
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// Debug builds: Use 5-second timeout for deadlock detection
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BaseType_t result = xSemaphoreTakeRecursive(mutex, pdMS_TO_TICKS(5000));
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if (result != pdTRUE) {
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// Log holder info if available
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TaskHandle_t holder = xSemaphoreGetMutexHolder(mutex);
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(void)holder; // Suppress unused warning if logging disabled
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// Crash with diagnostic info
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assert(false && "LVGL mutex timeout (5s) - possible deadlock");
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}
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_acquired = true;
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#else
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// Release builds: Wait indefinitely (production behavior)
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xSemaphoreTakeRecursive(mutex, portMAX_DELAY);
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_acquired = true;
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#endif
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}
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}
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~LVGLLock() {
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if (_acquired) {
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SemaphoreHandle_t mutex = LVGLInit::get_mutex();
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if (mutex) {
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xSemaphoreGiveRecursive(mutex);
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}
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}
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}
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// Non-copyable
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LVGLLock(const LVGLLock&) = delete;
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LVGLLock& operator=(const LVGLLock&) = delete;
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private:
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bool _acquired = false;
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};
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} // namespace LVGL
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} // namespace UI
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// Convenience macro - creates a scoped lock variable
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#define LVGL_LOCK() UI::LVGL::LVGLLock _lvgl_lock_guard
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#endif // ARDUINO
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#endif // UI_LVGL_LVGLLOCK_H
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