Method Close

src/Storage/FileStore.cpp:184–243

This may be called from an ISR, in which case we need to defer the close

// This may be called from an ISR, in which case we need to defer the close
bool FileStore::Close() noexcept
{
	switch (usageMode)
	{
	case FileUseMode::free:
		if (!inInterrupt())
		{
			REPORT_INTERNAL_ERROR;
		}
		return false;

	case FileUseMode::readOnly:
	case FileUseMode::readWrite:
		{
			const auto flags = IrqSave();
			if (openCount > 1)
			{
				--openCount;
				IrqRestore(flags);
				return true;
			}
			else if (inInterrupt())
			{
				closeRequested = true;
				IrqRestore(flags);
				return true;
			}
			else
			{
				IrqRestore(flags);
				return ForceClose();
			}
		}

	case FileUseMode::invalidated:
	default:
		{
			const auto flags = IrqSave();
			if (openCount > 1)
			{
				--openCount;
				IrqRestore(flags);
			}
			else
			{
#if HAS_MASS_STORAGE || HAS_SBC_INTERFACE
				FileWriteBuffer *wb = nullptr;
				std::swap(wb, writeBuffer);
				IrqRestore(flags);
				if (wb != nullptr)
				{
					MassStorage::ReleaseWriteBuffer(wb);
				}
#endif
				usageMode = FileUseMode::free;
			}
			return true;
		}