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[host] switch to fast polling mode, fixes stuttering issues

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This commit is contained in:
Geoffrey McRae 2017-12-14 02:22:41 +11:00
parent afff50dfde
commit e379f70784
3 changed files with 21 additions and 28 deletions
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1
common/KVMFR.h
View File

@ -69,6 +69,7 @@ KVMFRFrame;
#define KVMFR_HEADER_FLAG_FRAME 1 // frame update available #define KVMFR_HEADER_FLAG_FRAME 1 // frame update available
#define KVMFR_HEADER_FLAG_CURSOR 2 // cursor update available #define KVMFR_HEADER_FLAG_CURSOR 2 // cursor update available
#define KVMFR_HEADER_FLAG_RESTART 4 // restart signal from client #define KVMFR_HEADER_FLAG_RESTART 4 // restart signal from client
#define KVMFR_HEADER_FLAG_READY 8 // ready signal from client
typedef struct KVMFRHeader typedef struct KVMFRHeader
{ {

46
host/Service.cpp
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@ -30,7 +30,7 @@ Service * Service::m_instance = NULL;
Service::Service() : Service::Service() :
m_initialized(false), m_initialized(false),
m_memory(NULL), m_memory(NULL),
m_readyEvent(INVALID_HANDLE_VALUE), m_timer(NULL),
m_capture(NULL), m_capture(NULL),
m_header(NULL), m_header(NULL),
m_frameIndex(0) m_frameIndex(0)
@ -73,11 +73,10 @@ bool Service::Initialize(ICapture * captureDevice)
if (!InitPointers()) if (!InitPointers())
return false; return false;
m_readyEvent = m_ivshmem->CreateVectorEvent(0); m_timer = CreateWaitableTimer(NULL, TRUE, NULL);
if (m_readyEvent == INVALID_HANDLE_VALUE) if (!m_timer)
{ {
DEBUG_ERROR("Failed to get event for vector 0"); DEBUG_ERROR("Failed to create waitable timer");
DeInitialize();
return false; return false;
} }
@ -117,10 +116,10 @@ bool Service::InitPointers()
void Service::DeInitialize() void Service::DeInitialize()
{ {
if (m_readyEvent != INVALID_HANDLE_VALUE) if (m_timer)
{ {
CloseHandle(m_readyEvent); CloseHandle(m_timer);
m_readyEvent = INVALID_HANDLE_VALUE; m_timer = NULL;
} }
m_header = NULL; m_header = NULL;
@ -153,8 +152,7 @@ bool Service::Process()
frame.bufferSize = m_frameSize; frame.bufferSize = m_frameSize;
// wait for the host to notify that is it is ready to proceed // wait for the host to notify that is it is ready to proceed
bool eventDone = false; while (true)
while (!eventDone)
{ {
// check if the client has flagged a restart // check if the client has flagged a restart
if (m_header->flags & KVMFR_HEADER_FLAG_RESTART) if (m_header->flags & KVMFR_HEADER_FLAG_RESTART)
@ -164,29 +162,23 @@ bool Service::Process()
break; break;
} }
switch (WaitForSingleObject(m_readyEvent, 200)) // check if the client has flagged it's ready
if (m_header->flags & KVMFR_HEADER_FLAG_READY)
{ {
case WAIT_ABANDONED: InterlockedAnd8((char *)&m_header->flags, ~(KVMFR_HEADER_FLAG_READY));
DEBUG_ERROR("Wait abandoned");
return false;
case WAIT_OBJECT_0:
eventDone = true;
break; break;
}
case WAIT_TIMEOUT: // wait for 100ns before polling again
continue; LARGE_INTEGER timeout;
timeout.QuadPart = -100;
case WAIT_FAILED: if (!SetWaitableTimer(m_timer, &timeout, 0, NULL, NULL, FALSE))
DEBUG_ERROR("Wait failed"); {
return false; DEBUG_ERROR("Failed to set waitable timer");
default:
DEBUG_ERROR("Unknown error");
return false; return false;
} }
WaitForSingleObject(m_timer, INFINITE);
} }
ResetEvent(m_readyEvent);
bool ok = false; bool ok = false;
bool cursorOnly = false; bool cursorOnly = false;

2
host/Service.h
View File

@ -51,7 +51,7 @@ private:
bool m_initialized; bool m_initialized;
uint8_t * m_memory; uint8_t * m_memory;
IVSHMEM * m_ivshmem; IVSHMEM * m_ivshmem;
HANDLE m_readyEvent; HANDLE m_timer;
ICapture * m_capture; ICapture * m_capture;
KVMFRHeader * m_header; KVMFRHeader * m_header;