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fix: use RAII render lock everywhere (#916)

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## Summary

Follow-up to
https://github.com/crosspoint-reader/crosspoint-reader/pull/774

---

### AI Usage

While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.

Did you use AI tools to help write this code? **NO**


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

## Release Notes

* **Refactor**
* Modernized internal synchronization mechanisms across multiple
components to improve code reliability and maintainability. All
functionality remains unchanged.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->
This commit is contained in:
Xuan-Son Nguyen
2026-02-16 13:53:00 +01:00
committed by GitHub
parent 6702060960
commit 3d47c081f2
7 changed files with 151 additions and 126 deletions
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108
src/activities/reader/EpubReaderActivity.cpp
View File

@@ -221,11 +221,12 @@ void EpubReaderActivity::loop() {
if (skipChapter) {
// We don't want to delete the section mid-render, so grab the semaphore
xSemaphoreTake(renderingMutex, portMAX_DELAY);
nextPageNumber = 0;
currentSpineIndex = nextTriggered ? currentSpineIndex + 1 : currentSpineIndex - 1;
section.reset();
xSemaphoreGive(renderingMutex);
{
RenderLock lock(*this);
nextPageNumber = 0;
currentSpineIndex = nextTriggered ? currentSpineIndex + 1 : currentSpineIndex - 1;
section.reset();
}
requestUpdate();
return;
}
@@ -241,11 +242,12 @@ void EpubReaderActivity::loop() {
section->currentPage--;
} else {
// We don't want to delete the section mid-render, so grab the semaphore
xSemaphoreTake(renderingMutex, portMAX_DELAY);
nextPageNumber = UINT16_MAX;
currentSpineIndex--;
section.reset();
xSemaphoreGive(renderingMutex);
{
RenderLock lock(*this);
nextPageNumber = UINT16_MAX;
currentSpineIndex--;
section.reset();
}
}
requestUpdate();
} else {
@@ -253,11 +255,12 @@ void EpubReaderActivity::loop() {
section->currentPage++;
} else {
// We don't want to delete the section mid-render, so grab the semaphore
xSemaphoreTake(renderingMutex, portMAX_DELAY);
nextPageNumber = 0;
currentSpineIndex++;
section.reset();
xSemaphoreGive(renderingMutex);
{
RenderLock lock(*this);
nextPageNumber = 0;
currentSpineIndex++;
section.reset();
}
}
requestUpdate();
}
@@ -325,12 +328,13 @@ void EpubReaderActivity::jumpToPercent(int percent) {
}
// Reset state so render() reloads and repositions on the target spine.
xSemaphoreTake(renderingMutex, portMAX_DELAY);
currentSpineIndex = targetSpineIndex;
nextPageNumber = 0;
pendingPercentJump = true;
section.reset();
xSemaphoreGive(renderingMutex);
{
RenderLock lock(*this);
currentSpineIndex = targetSpineIndex;
nextPageNumber = 0;
pendingPercentJump = true;
section.reset();
}
}
void EpubReaderActivity::onReaderMenuConfirm(EpubReaderMenuActivity::MenuAction action) {
@@ -403,24 +407,25 @@ void EpubReaderActivity::onReaderMenuConfirm(EpubReaderMenuActivity::MenuAction
break;
}
case EpubReaderMenuActivity::MenuAction::DELETE_CACHE: {
xSemaphoreTake(renderingMutex, portMAX_DELAY);
if (epub) {
// 2. BACKUP: Read current progress
// We use the current variables that track our position
uint16_t backupSpine = currentSpineIndex;
uint16_t backupPage = section->currentPage;
uint16_t backupPageCount = section->pageCount;
{
RenderLock lock(*this);
if (epub) {
// 2. BACKUP: Read current progress
// We use the current variables that track our position
uint16_t backupSpine = currentSpineIndex;
uint16_t backupPage = section->currentPage;
uint16_t backupPageCount = section->pageCount;
section.reset();
// 3. WIPE: Clear the cache directory
epub->clearCache();
section.reset();
// 3. WIPE: Clear the cache directory
epub->clearCache();
// 4. RESTORE: Re-setup the directory and rewrite the progress file
epub->setupCacheDir();
// 4. RESTORE: Re-setup the directory and rewrite the progress file
epub->setupCacheDir();
saveProgress(backupSpine, backupPage, backupPageCount);
saveProgress(backupSpine, backupPage, backupPageCount);
}
}
xSemaphoreGive(renderingMutex);
// Defer go home to avoid race condition with display task
pendingGoHome = true;
break;
@@ -458,23 +463,24 @@ void EpubReaderActivity::applyOrientation(const uint8_t orientation) {
}
// Preserve current reading position so we can restore after reflow.
xSemaphoreTake(renderingMutex, portMAX_DELAY);
if (section) {
cachedSpineIndex = currentSpineIndex;
cachedChapterTotalPageCount = section->pageCount;
nextPageNumber = section->currentPage;
{
RenderLock lock(*this);
if (section) {
cachedSpineIndex = currentSpineIndex;
cachedChapterTotalPageCount = section->pageCount;
nextPageNumber = section->currentPage;
}
// Persist the selection so the reader keeps the new orientation on next launch.
SETTINGS.orientation = orientation;
SETTINGS.saveToFile();
// Update renderer orientation to match the new logical coordinate system.
applyReaderOrientation(renderer, SETTINGS.orientation);
// Reset section to force re-layout in the new orientation.
section.reset();
}
// Persist the selection so the reader keeps the new orientation on next launch.
SETTINGS.orientation = orientation;
SETTINGS.saveToFile();
// Update renderer orientation to match the new logical coordinate system.
applyReaderOrientation(renderer, SETTINGS.orientation);
// Reset section to force re-layout in the new orientation.
section.reset();
xSemaphoreGive(renderingMutex);
}
// TODO: Failure handling