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[idd] clipboard: batch helper stream delivery

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Extend the clipboard target boundary with ordered prefix delivery.
Pass up to four queued LGMP stream records to the Helper ring in one
operation, apply state only to the accepted prefix, and retain the
remaining suffix for exact retries.

The channel holds its write lock across the prefix and emits one pipe
doorbell per stream window instead of one per record.
This commit is contained in:
Geoffrey McRae
2026-08-15 16:32:43 +10:00
parent 5bdfc0fe80
commit 94d5f3729e
5 changed files with 206 additions and 111 deletions
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31
idd/LGIdd/transport/CClipboardHub.cpp
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@@ -384,14 +384,31 @@ void CClipboardHub::ClipboardReset(uint64_t epoch, uint32_t reason)
ClipboardChannelResult CClipboardHub::SendClipboard(
const KVMFRClipboardMessage& record, const uint8_t * data)
{
// Keep the shared lock through Send so Unbind cannot advance the binding
// generation after validation but before the record enters the channel.
CSRWSharedLock lock(m_lock);
if (!ValidClientDirection(record) ||
m_stopped || !m_available || !m_active || !m_running || m_failed ||
!m_source || record.generation != m_generation)
const ClipboardChannelWrite write = { record, data };
size_t accepted = 0;
return SendClipboardBatch(&write, 1, accepted);
}
ClipboardChannelResult CClipboardHub::SendClipboardBatch(
const ClipboardChannelWrite * records, size_t count, size_t& accepted)
{
accepted = 0;
if (!records || !count || count > KVMFR_CLIPBOARD_SLOT_COUNT)
return ClipboardChannelResult::FAILED;
return m_channel.Send(record, data);
// Keep the shared lock through Send so Unbind cannot advance the binding
// generation after validation but before the records enter the channel.
CSRWSharedLock lock(m_lock);
if (m_stopped || !m_available || !m_active || !m_running || m_failed ||
!m_source)
return ClipboardChannelResult::FAILED;
for (size_t i = 0; i < count; ++i)
if (!ValidClientDirection(records[i].record) ||
records[i].record.generation != m_generation)
return ClipboardChannelResult::FAILED;
return m_channel.SendBatch(records, count, accepted);
}
void CClipboardHub::ClipboardReceiveReady()