Win32 specific: Using SHChangeNotifyRegister to get notifications

on removable media insert / eject events.
From now on we no more poll for removable media on Windows.

Thanks @mjgtp from prusaprinters.org
See the following discussion:
https://forum.prusaprinters.org/forum/prusaslicer/prusaslicer-trying-to-access-my-floppy-disk-a

The final working code sample was taken from Chromium source code,
volume_mount_watcher_win.cc
This commit is contained in:
bubnikv 2020-03-27 08:10:00 +01:00
parent 3fdd643f49
commit 58192ba6c2
4 changed files with 73 additions and 11 deletions

View file

@ -452,14 +452,8 @@ void RemovableDriveManager::thread_proc()
{
std::unique_lock<std::mutex> lck(m_thread_stop_mutex);
#ifdef _WIN32
// Windows do not send an update on insert / eject of an SD card into an external SD card reader.
// Windows also do not send an update on software eject of a FLASH drive.
// We can likely use the Windows WMI API, but it will be quite time consuming to implement.
// https://www.codeproject.com/Articles/10539/Making-WMI-Queries-In-C
// https://docs.microsoft.com/en-us/windows/win32/wmisdk/wmi-start-page
// https://docs.microsoft.com/en-us/windows/win32/wmisdk/com-api-for-wmi
// https://docs.microsoft.com/en-us/windows/win32/wmisdk/example--receiving-event-notifications-through-wmi-
m_thread_stop_condition.wait_for(lck, std::chrono::seconds(2), [this]{ return m_stop || m_wakeup; });
// Reacting to updates by WM_DEVICECHANGE and WM_USER_MEDIACHANGED
m_thread_stop_condition.wait(lck, [this]{ return m_stop || m_wakeup; });
#else
m_thread_stop_condition.wait_for(lck, std::chrono::seconds(2), [this]{ return m_stop; });
#endif