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Fix loss of all paired computers if Moonlight is terminated while writing the computer list

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This commit is contained in:
Cameron Gutman 2023-09-02 16:43:25 -05:00
parent 83f5f6cefc
commit a1d592bb87
1 changed files with 36 additions and 9 deletions
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45
app/backend/computermanager.cpp
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@ -13,6 +13,7 @@
#include <random>
#define SER_HOSTS "hosts"
#define SER_HOSTS_BACKUP "hostsbackup"
class PcMonitorThread : public QThread
{
@ -152,8 +153,16 @@ ComputerManager::ComputerManager(QObject *parent)
{
QSettings settings;
// If there's a hosts backup copy, we must have failed to commit
// a previous update before exiting. Restore the backup now.
int hosts = settings.beginReadArray(SER_HOSTS_BACKUP);
if (hosts == 0) {
// If there's no host backup, read from the primary location.
settings.endArray();
hosts = settings.beginReadArray(SER_HOSTS);
}
// Inflate our hosts from QSettings
int hosts = settings.beginReadArray(SER_HOSTS);
for (int i = 0; i < hosts; i++) {
settings.setArrayIndex(i);
NvComputer* computer = new NvComputer(settings);
@ -245,17 +254,35 @@ void DelayedFlushThread::run() {
// Perform the flush
{
QReadLocker lock(&m_ComputerManager->m_Lock);
QSettings settings;
settings.remove(SER_HOSTS);
settings.beginWriteArray(SER_HOSTS);
int i = 0;
for (const NvComputer* computer : m_ComputerManager->m_KnownHosts) {
settings.setArrayIndex(i++);
computer->serialize(settings);
// First, write to the backup location
settings.beginWriteArray(SER_HOSTS_BACKUP);
{
QReadLocker lock(&m_ComputerManager->m_Lock);
int i = 0;
for (const NvComputer* computer : m_ComputerManager->m_KnownHosts) {
settings.setArrayIndex(i++);
computer->serialize(settings);
}
}
settings.endArray();
// Next, write to the primary location
settings.remove(SER_HOSTS);
settings.beginWriteArray(SER_HOSTS);
{
QReadLocker lock(&m_ComputerManager->m_Lock);
int i = 0;
for (const NvComputer* computer : m_ComputerManager->m_KnownHosts) {
settings.setArrayIndex(i++);
computer->serialize(settings);
}
}
settings.endArray();
// Finally, delete the backup copy
settings.remove(SER_HOSTS_BACKUP);
}
}
}