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[clipboard] lgmp: make payload streams mandatory

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Carry DATA and FILE_DATA only through the duplex SPSC streams. Keep LGMP
queues for control and status. Remove grants, commits, ACKs, and
queue-payload transport negotiation.

Poll adaptively while ownership or release is active. Preserve FIFO
release and graceful draining. Quarantine payloads crossed by a newer
OFFER or CLEAR, and retire data-plane state on detach.
This commit is contained in:
Geoffrey McRae
2026-08-15 14:36:33 +10:00
parent 12801df353
commit be4bb19fa4
4 changed files with 277 additions and 596 deletions
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27
idd/LGIdd/transport/lgmp/CLGMPClipboardTransport.h
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@@ -41,14 +41,14 @@ class CLGMPHost;
class CLGMPClipboardTransport final : public IClipboardSource
{
private:
static constexpr unsigned MEMORY_COUNT = KVMFR_CLIPBOARD_SLOT_COUNT;
static constexpr unsigned MEMORY_COUNT =
KVMFR_CLIPBOARD_STREAM_SLOT_COUNT;
static constexpr unsigned INTERNAL_TARGET_COUNT =
CLGMPClipboardFiles::MAX_ACQUISITIONS +
CLGMPClipboardFiles::MAX_REQUESTS + 3;
static constexpr ULONGLONG OWNER_LEASE_MS = 1000;
static constexpr ULONGLONG STREAM_DRAIN_TIMEOUT_MS = 1000;
static constexpr DWORD ACTIVE_POLL_MS = 5;
static constexpr DWORD STREAM_POLL_MS = 1;
static constexpr DWORD IDLE_POLL_MS = 50;
static constexpr unsigned STREAM_TARGET_COUNT =
KVMFR_CLIPBOARD_STREAM_SLOT_COUNT;
@@ -78,18 +78,10 @@ private:
bool Active() const { return transfer != 0; }
};
struct Grant
{
uint32_t generation = 0;
bool offered = false;
bool committed = false;
};
struct PendingTarget
{
bool valid = false;
bool acknowledge = false;
int grant = -1;
KVMFRClipboardMessage record = {};
uint8_t data[KVMFR_CLIPBOARD_DATA_BYTES] = {};
@@ -97,7 +89,6 @@ private:
{
valid = false;
acknowledge = false;
grant = -1;
record = {};
}
};
@@ -117,8 +108,6 @@ private:
PLGMPHostStream m_clientToHostStream = nullptr;
PLGMPMemory m_statusMemory [MEMORY_COUNT] = {};
PLGMPMemory m_messageMemory[MEMORY_COUNT] = {};
PLGMPMemory m_grantMemory [MEMORY_COUNT] = {};
PLGMPMemory m_dataMemory [MEMORY_COUNT] = {};
CSRWLock m_lifecycleLock;
CSRWLock m_lock;
@@ -138,10 +127,8 @@ private:
uint32_t m_endpointGeneration = 0;
uint32_t m_ownerClientID = 0;
uint32_t m_ownerGeneration = 0;
KVMFRClipboardTransportFlags m_ownerTransport = 0;
uint32_t m_statusSerial = 0;
uint32_t m_messageSerial = 0;
uint32_t m_dataSerial = 0;
uint32_t m_helperFormats = 0;
uint32_t m_clientFormats = 0;
uint32_t m_blockedOwnerClientID = 0;
@@ -158,7 +145,6 @@ private:
KVMFRStreamDescriptor m_clientToHostDescriptor = {};
Transfer m_clientToHelper;
Transfer m_helperToClient;
Grant m_grants[MEMORY_COUNT];
PendingTarget m_pendingTarget;
StreamTarget m_streamTarget[STREAM_TARGET_COUNT];
unsigned m_streamTargetHead = 0;
@@ -171,13 +157,13 @@ private:
void DeInit();
bool InitializeStreams();
void DeInitStreams();
bool BindStreams(uint32_t clientID);
bool BindStreams(uint32_t clientID) const;
bool TryUnbindStreams();
void ForceUnbindStreams();
void ForceUnbindStreams() const;
static DWORD CALLBACK ThreadProc(void * context);
void Thread();
void Wake();
void Wake() const;
bool IsOwner(uint32_t clientID, uint32_t generation) const;
bool OwnerSubscribed() const;
@@ -210,7 +196,6 @@ private:
PLGMPMemory FindAvailable(PLGMPMemory (&memory)[MEMORY_COUNT]) const;
PostResult PostForOwner(uint64_t udata, PLGMPMemory memory);
bool PublishStatus();
bool PostGrants();
bool ReplayClipboard();
bool DrainMessage();
bool ProcessMessage(uint32_t clientID,
@@ -231,7 +216,7 @@ private:
void ApplyInbound(const KVMFRClipboardMessage& message);
void ApplyOutbound(const KVMFRClipboardMessage& message);
bool BeginTarget(const KVMFRClipboardMessage& message,
const uint8_t * data, int grant);
const uint8_t * data, bool acknowledge);
ClipboardChannelResult SendControl(
const KVMFRClipboardMessage& record);