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[idd] transport: arbitrate interaction requests

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This commit is contained in:
Geoffrey McRae
2026-08-13 00:20:38 +10:00
parent 5b09d4f90a
commit fbc4640623
10 changed files with 270 additions and 38 deletions
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19
idd/LGIdd/transport/CInputHub.h
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@@ -31,9 +31,17 @@ class IInputSink;
class CInputHub final : public IInputTransport
{
public:
struct InteractionPermit
{
uint64_t serial = 0;
SourceKey source;
};
private:
static constexpr unsigned MAX_SOURCES = 8;
static constexpr uint64_t OWNER_LEASE_MS = 500;
static constexpr uint64_t INTERACTION_LEASE_MS = 500;
struct Source final : public IInputTarget
{
@@ -72,12 +80,18 @@ private:
uint64_t m_sinkState = 0;
SourceKey m_owner;
uint64_t m_ownerDeadline = 0;
SourceKey m_interactionOwner;
uint64_t m_interactionDeadline = 0;
uint64_t m_interactionSerial = 1;
bool m_started = false;
bool SourceValid(const SourceKey& source) const;
bool BindingPresent(const SourceKey& source) const;
bool BindingValid(const SourceKey& source) const;
bool OwnerValid(const SourceKey& source) const;
void ClearInteraction();
void InvalidateInteraction();
void AdvanceInteractionSerial();
bool CheckState();
InputTargetState GetState(const SourceKey& source);
void Failed(Source& source);
@@ -101,6 +115,11 @@ public:
bool Bind(BackendId backend, uint32_t epoch, IInputSource& source);
void Unbind(BackendId backend, uint32_t epoch);
InteractionResult CheckInteraction(
SourceKey& source, InteractionPermit& permit);
void CommitInteraction(
const SourceKey& source, const InteractionPermit& permit);
void RevokeInteraction(BackendId backend, uint32_t epoch);
bool TakeFailure(SourceKey& source);
bool Start(IInputSink& sink) override;