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[host] windows: handle graceful shutdown on user switch

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This commit is contained in:
Geoffrey McRae 2024-03-06 15:02:37 +11:00
parent 6a72633674
commit 545e736389
4 changed files with 185 additions and 161 deletions
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2
host/include/interface/platform.h
View file

@ -37,7 +37,7 @@
int app_main(int argc, char * argv[]);
bool app_init(void);
void app_shutdown(void);
void app_quit(void);
void app_quit(int exitcode);
// these must be implemented for each OS
const char * os_getExecutable(void);

2
host/platform/Linux/src/platform.c
View file

@ -62,7 +62,7 @@ int main(int argc, char * argv[])
void sigHandler(int signo)
{
DEBUG_INFO("SIGINT");
app_quit();
app_quit(LG_HOST_EXIT_USER);
}
bool app_init(void)

15
host/platform/Windows/src/platform.c
View file

@ -246,7 +246,7 @@ LRESULT CALLBACK DummyWndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
NULL
);
if (clicked == ID_MENU_EXIT ) app_quit();
if (clicked == ID_MENU_EXIT ) app_quit(LG_HOST_EXIT_USER);
else if (clicked == ID_MENU_SHOW_LOG)
{
const char * logFile = option_get_string("os", "logFile");
@ -259,6 +259,14 @@ LRESULT CALLBACK DummyWndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
break;
}
case WM_WTSSESSION_CHANGE:
if (wParam == WTS_CONSOLE_DISCONNECT)
{
DEBUG_INFO("Console disconnected, shutting down");
app_quit(LG_HOST_EXIT_CAPTURE);
}
break;
default:
if (msg == app.trayRestartMsg)
RegisterTrayIcon();
@ -440,6 +448,9 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
AppendMenu(app.trayMenu, MF_SEPARATOR, 0 , NULL );
AppendMenu(app.trayMenu, MF_STRING , ID_MENU_EXIT , "Exit" );
if (!WTSRegisterSessionNotification(app.messageWnd, NOTIFY_FOR_THIS_SESSION))
DEBUG_WINERROR("WTSRegisterSessionNotification failed", GetLastError());
// create the application thread
LGThread * thread;
if (!lgCreateThread("appThread", appThread, NULL, &thread))
@ -470,6 +481,8 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
}
shutdown:
WTSUnRegisterSessionNotification(app.messageWnd);
DestroyMenu(app.trayMenu);
app_shutdown();
UnregisterWait(app.exitWait);

327
host/src/app.c
View file

@ -68,8 +68,8 @@ enum AppState
{
APP_STATE_RUNNING,
APP_STATE_IDLE,
APP_STATE_RESTART,
APP_STATE_REINIT,
APP_STATE_TRANSITION_TO_IDLE,
APP_STATE_REINIT_LGMP,
APP_STATE_SHUTDOWN
};
@ -103,10 +103,12 @@ struct app
uint32_t frameSerial;
CaptureInterface * iface;
bool captureStarted;
enum AppState state;
enum AppState state, lastState;
LGTimer * lgmpTimer;
LGThread * frameThread;
bool threadsStarted;
};
static struct app app;
@ -156,6 +158,14 @@ static struct Option options[] =
{0}
};
inline static void setAppState(enum AppState state)
{
if (app.state == APP_STATE_SHUTDOWN)
return;
app.lastState = app.state;
app.state = state;
}
static bool lgmpTimer(void * opaque)
{
LGMP_STATUS status;
@ -166,12 +176,12 @@ static bool lgmpTimer(void * opaque)
{
DEBUG_ERROR("LGMP reported the shared memory has been corrrupted, "
"attempting to recover");
app.state = APP_STATE_REINIT;
setAppState(APP_STATE_REINIT_LGMP);
return false;
}
DEBUG_ERROR("lgmpHostProcess Failed: %s", lgmpStatusString(status));
app.state = APP_STATE_SHUTDOWN;
setAppState(APP_STATE_SHUTDOWN);
return false;
}
@ -196,7 +206,7 @@ static bool lgmpTimer(void * opaque)
return true;
}
static bool sendFrame(CaptureResult result)
static bool sendFrame(CaptureResult result, bool * restart)
{
CaptureFrame frame = { 0 };
bool repeatFrame = false;
@ -225,13 +235,14 @@ static bool sendFrame(CaptureResult result)
case CAPTURE_RESULT_REINIT:
{
app.state = APP_STATE_RESTART;
*restart = true;
DEBUG_INFO("Frame thread reinit");
return false;
}
case CAPTURE_RESULT_ERROR:
{
*restart = false;
DEBUG_ERROR("Failed to get the frame");
return false;
}
@ -363,39 +374,43 @@ static int frameThread(void * opaque)
while(app.state == APP_STATE_RUNNING)
{
if (!sendFrame(CAPTURE_RESULT_OK))
bool restart = false;
if (!sendFrame(CAPTURE_RESULT_OK, &restart))
{
if (restart)
setAppState(APP_STATE_TRANSITION_TO_IDLE);
break;
}
}
DEBUG_INFO("Frame thread stopped");
return 0;
}
bool startThreads(void)
{
app.state = APP_STATE_RUNNING;
if (!app.iface->asyncCapture)
if (app.threadsStarted)
return true;
if (!lgCreateThread("FrameThread", frameThread, NULL, &app.frameThread))
{
DEBUG_ERROR("Failed to create the frame thread");
return false;
}
if (app.iface->asyncCapture)
if (!lgCreateThread("FrameThread", frameThread, NULL, &app.frameThread))
{
DEBUG_ERROR("Failed to create the frame thread");
return false;
}
app.threadsStarted = true;
return true;
}
bool stopThreads(void)
{
app.iface->stop();
if (app.state != APP_STATE_SHUTDOWN &&
app.state != APP_STATE_REINIT)
app.state = APP_STATE_IDLE;
if (!app.iface->asyncCapture)
if (!app.threadsStarted)
return true;
if (app.frameThread)
app.iface->stop();
if (app.iface->asyncCapture && app.frameThread)
{
if (!lgJoinThread(app.frameThread, NULL))
{
@ -406,32 +421,37 @@ bool stopThreads(void)
app.frameThread = NULL;
}
app.threadsStarted = false;
return true;
}
static bool captureStart(void)
{
if (app.state == APP_STATE_IDLE)
{
if (!app.iface->init(app.ivshmemBase, &app.alignSize))
{
DEBUG_ERROR("Failed to initialize the capture device");
return false;
}
if (app.captureStarted)
return true;
if (app.iface->start && !app.iface->start())
{
DEBUG_ERROR("Failed to start the capture device");
return false;
}
if (!app.iface->init(app.ivshmemBase, &app.alignSize))
{
DEBUG_ERROR("Failed to initialize the capture device");
return false;
}
if (app.iface->start && !app.iface->start())
{
DEBUG_ERROR("Failed to start the capture device");
return false;
}
DEBUG_INFO("==== [ Capture Start ] ====");
app.captureStarted = true;
return true;
}
static bool captureStop(void)
{
if (!app.captureStarted)
return true;
DEBUG_INFO("==== [ Capture Stop ] ====");
if (!app.iface->deinit())
@ -441,6 +461,7 @@ static bool captureStop(void)
}
app.frameValid = false;
app.captureStarted = false;
return true;
}
@ -790,7 +811,8 @@ int app_main(int argc, char * argv[])
// make sure rng is actually seeded for LGMP
srand((unsigned)time(NULL));
app.state = APP_STATE_RUNNING;
app.lastState = APP_STATE_RUNNING;
app.state = APP_STATE_RUNNING;
ivshmemOptionsInit();
// register capture interface options
@ -887,7 +909,8 @@ int app_main(int argc, char * argv[])
continue;
}
if (iface->init(app.ivshmemBase, &app.alignSize))
app.iface = iface;
if (captureStart())
break;
iface->free();
@ -896,6 +919,8 @@ int app_main(int argc, char * argv[])
if (!iface)
{
app.iface = NULL;
if (*ifaceName)
DEBUG_ERROR("Specified capture interface not supported");
else
@ -907,8 +932,6 @@ int app_main(int argc, char * argv[])
DEBUG_INFO("Using : %s", iface->getName());
DEBUG_INFO("Capture Method : %s", iface->asyncCapture ?
"Asynchronous" : "Synchronous");
app.iface = iface;
}
if (!lgmpSetup(&shmDev))
@ -919,141 +942,129 @@ int app_main(int argc, char * argv[])
LG_LOCK_INIT(app.pointerLock);
if (app.iface->start && !app.iface->start())
do
{
DEBUG_ERROR("Failed to start the capture interface");
exitcode = LG_HOST_EXIT_FATAL;
goto fail_lgmp;
}
while(app.state != APP_STATE_SHUTDOWN)
{
if (app.state == APP_STATE_REINIT)
switch(app.state)
{
DEBUG_INFO("Performing LGMP reinitialization");
lgmpShutdown();
app.state = APP_STATE_RUNNING;
if (!lgmpSetup(&shmDev))
goto fail_lgmp;
}
if (app.state == APP_STATE_IDLE)
{
if(lgmpHostQueueHasSubs(app.pointerQueue) ||
lgmpHostQueueHasSubs(app.frameQueue))
{
if (!captureStart())
{
exitcode = LG_HOST_EXIT_FAILED;
goto fail_capture;
}
if (!startThreads())
{
exitcode = LG_HOST_EXIT_FAILED;
goto fail_threads;
}
}
else
{
usleep(100000);
continue;
}
}
while(likely(app.state != APP_STATE_SHUTDOWN && (
lgmpHostQueueHasSubs(app.pointerQueue) ||
lgmpHostQueueHasSubs(app.frameQueue))))
{
if (unlikely(
app.state == APP_STATE_RESTART ||
app.state == APP_STATE_REINIT))
case APP_STATE_REINIT_LGMP:
DEBUG_INFO("Performing LGMP reinitialization");
lgmpShutdown();
setAppState(app.lastState);
if (!lgmpSetup(&shmDev))
goto fail_lgmp;
break;
if (unlikely(lgmpHostQueueNewSubs(app.pointerQueue) > 0))
{
LG_LOCK(app.pointerLock);
sendPointer(true);
LG_UNLOCK(app.pointerLock);
}
const uint64_t delta = microtime() - previousFrameTime;
if (delta < throttleUs)
{
const uint64_t us = throttleUs - delta;
// only delay if the time is reasonable
if (us > 1000)
nsleep(us * 1000);
}
const uint64_t captureStart = microtime();
const CaptureResult result = app.iface->capture(
app.captureIndex, app.frameBuffer[app.captureIndex]);
if (likely(result == CAPTURE_RESULT_OK))
previousFrameTime = captureStart;
else if (likely(result == CAPTURE_RESULT_TIMEOUT))
{
if (!app.iface->asyncCapture)
if (unlikely(app.frameValid &&
lgmpHostQueueNewSubs(app.frameQueue) > 0))
{
LGMP_STATUS status;
if ((status = lgmpHostQueuePost(app.frameQueue, 0,
app.frameMemory[app.readIndex])) != LGMP_OK)
DEBUG_ERROR("%s", lgmpStatusString(status));
}
}
else
{
switch(result)
case APP_STATE_IDLE:
// if there are no clients subscribed, just remain idle
if (!lgmpHostQueueHasSubs(app.pointerQueue) &&
!lgmpHostQueueHasSubs(app.frameQueue))
{
case CAPTURE_RESULT_REINIT:
app.state = APP_STATE_RESTART;
continue;
case CAPTURE_RESULT_ERROR:
DEBUG_ERROR("Capture interface reported a fatal error");
exitcode = LG_HOST_EXIT_FAILED;
goto fail_capture;
default:
DEBUG_ASSERT("Invalid capture result");
usleep(100000);
continue;
}
}
if (!app.iface->asyncCapture)
sendFrame(result);
}
// clients subscribed, start the capture
if (!captureStart() || !startThreads())
{
exitcode = LG_HOST_EXIT_FAILED;
goto fail;
}
setAppState(APP_STATE_RUNNING);
break;
if (app.state != APP_STATE_SHUTDOWN)
{
if (!stopThreads())
case APP_STATE_TRANSITION_TO_IDLE:
if (!stopThreads() || !captureStop())
{
exitcode = LG_HOST_EXIT_FAILED;
goto fail;
}
setAppState(APP_STATE_IDLE);
break;
case APP_STATE_RUNNING:
{
exitcode = LG_HOST_EXIT_FAILED;
goto fail_threads;
// if there are no clients subscribed, go idle
if (!lgmpHostQueueHasSubs(app.pointerQueue) &&
!lgmpHostQueueHasSubs(app.frameQueue))
{
setAppState(APP_STATE_TRANSITION_TO_IDLE);
break;
}
// if there is a brand new client, send them the pointer
if (unlikely(lgmpHostQueueNewSubs(app.pointerQueue) > 0))
{
LG_LOCK(app.pointerLock);
sendPointer(true);
LG_UNLOCK(app.pointerLock);
}
const uint64_t delta = microtime() - previousFrameTime;
if (delta < throttleUs)
{
const uint64_t us = throttleUs - delta;
// only delay if the time is reasonable
if (us > 1000)
nsleep(us * 1000);
}
const uint64_t captureStartTime = microtime();
const CaptureResult result = app.iface->capture(
app.captureIndex, app.frameBuffer[app.captureIndex]);
if (likely(result == CAPTURE_RESULT_OK))
previousFrameTime = captureStartTime;
else if (likely(result == CAPTURE_RESULT_TIMEOUT))
{
if (!app.iface->asyncCapture)
if (unlikely(app.frameValid &&
lgmpHostQueueNewSubs(app.frameQueue) > 0))
{
LGMP_STATUS status;
if ((status = lgmpHostQueuePost(app.frameQueue, 0,
app.frameMemory[app.readIndex])) != LGMP_OK)
DEBUG_ERROR("%s", lgmpStatusString(status));
}
}
else
{
switch(result)
{
case CAPTURE_RESULT_REINIT:
setAppState(APP_STATE_TRANSITION_TO_IDLE);
continue;
case CAPTURE_RESULT_ERROR:
DEBUG_ERROR("Capture interface reported a fatal error");
exitcode = LG_HOST_EXIT_FAILED;
goto fail;
default:
DEBUG_ASSERT("Invalid capture result");
}
}
if (!app.iface->asyncCapture)
{
bool restart = false;
if (!sendFrame(result, &restart) && restart)
setAppState(APP_STATE_TRANSITION_TO_IDLE);
}
break;
}
if (!captureStop())
{
exitcode = LG_HOST_EXIT_FAILED;
goto fail_capture;
}
continue;
case APP_STATE_SHUTDOWN:
break;
}
break;
}
while(app.state != APP_STATE_SHUTDOWN);
exitcode = app.exitcode;
fail:
stopThreads();
fail_threads:
captureStop();
fail_capture:
app.iface->free();
LG_LOCK_FREE(app.pointerLock);
@ -1072,7 +1083,7 @@ void app_shutdown(void)
app.state = APP_STATE_SHUTDOWN;
}
void app_quit(void)
void app_quit(int exitcode)
{
if (app.state == APP_STATE_SHUTDOWN)
{
@ -1080,6 +1091,6 @@ void app_quit(void)
exit(LG_HOST_EXIT_USER);
}
app.exitcode = LG_HOST_EXIT_USER;
app.exitcode = exitcode;
app_shutdown();
}