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[idd] make mode filtering rebuilds thread safe

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This commit is contained in:
Geoffrey McRae
2026-08-04 13:48:23 +10:00
parent f0696e079f
commit 84d1427cab
3 changed files with 15 additions and 16 deletions
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7
idd/LGIdd/CIndirectDeviceContext.cpp
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@@ -148,20 +148,21 @@ void CIndirectDeviceContext::QueryIddCxCapabilities()
bool CIndirectDeviceContext::PopulateDefaultModes()
{
g_settings.LoadModes();
const CSettings::DisplayModes configuredModes =
g_settings.LoadModes();
// Build the new mode list into a local first so we only hold the lock for
// the swap. IddCx readers may be iterating the live container on another
// thread; a clear()/push_back() under them would reallocate the backing
// store and crash. std::move makes the publish a pointer swap.
CSettings::DisplayModes newModes;
newModes.reserve(g_settings.GetDisplayModes().size());
newModes.reserve(configuredModes.size());
const UINT64 alignment = m_alignSize ? m_alignSize :
D3D12_DEFAULT_RESOURCE_PLACEMENT_ALIGNMENT;
bool hasPreferred = false;
for (const auto& configuredMode : g_settings.GetDisplayModes())
for (const auto& configuredMode : configuredModes)
{
UINT64 frameSize;
UINT64 requiredIVSHMEMSize;