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[host] app: allocate LGMP memory for KVMFRCursor updates without shapes

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This changes the host to use a seperate pool of LGMP memory for cursor
positionl updates without shape information helping to prevent
corruption of the shape entries if they are still pending. While this is
not a perfect solution it resolves the issue without making major
changes to LGMP during the RC phase we are currently in.
This commit is contained in:
Geoffrey McRae 2021-07-11 12:49:33 +10:00
parent 501b270890
commit 8db4b65dee
1 changed files with 47 additions and 24 deletions
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71
host/src/app.c
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@ -79,12 +79,14 @@ struct app
PLGMPHost lgmp;
PLGMPHostQueue pointerQueue;
PLGMPMemory pointerMemory[POINTER_SHAPE_BUFFERS];
PLGMPMemory pointerMemory[LGMP_Q_POINTER_LEN];
PLGMPMemory pointerShapeMemory[POINTER_SHAPE_BUFFERS];
LG_Lock pointerLock;
CapturePointer pointerInfo;
PLGMPMemory pointerShape;
bool pointerShapeValid;
unsigned int pointerIndex;
unsigned int pointerShapeIndex;
size_t maxFrameSize;
PLGMPHostQueue frameQueue;
@ -315,8 +317,8 @@ static bool captureStop(void)
bool captureGetPointerBuffer(void ** data, uint32_t * size)
{
PLGMPMemory mem = app.pointerMemory[app.pointerIndex];
*data = ((uint8_t*)lgmpHostMemPtr(mem)) + sizeof(KVMFRCursor);
PLGMPMemory mem = app.pointerShapeMemory[app.pointerShapeIndex];
*data = (uint8_t*)lgmpHostMemPtr(mem) + sizeof(KVMFRCursor);
*size = MAX_POINTER_SIZE - sizeof(KVMFRCursor);
return true;
}
@ -342,8 +344,18 @@ static void sendPointer(bool newClient)
// new clients need the last known shape and current position
if (newClient)
{
PLGMPMemory mem;
if (app.pointerShapeValid)
mem = app.pointerShape;
else
{
mem = app.pointerMemory[app.pointerIndex];
if (++app.pointerIndex == LGMP_Q_POINTER_LEN)
app.pointerIndex = 0;
}
// update the saved details with the current cursor position
KVMFRCursor *cursor = lgmpHostMemPtr(app.pointerShape);
KVMFRCursor *cursor = lgmpHostMemPtr(mem);
cursor->x = app.pointerInfo.x;
cursor->y = app.pointerInfo.y;
@ -351,12 +363,24 @@ static void sendPointer(bool newClient)
(app.pointerShapeValid ? CURSOR_FLAG_SHAPE : 0) |
(app.pointerInfo.visible ? CURSOR_FLAG_VISIBLE : 0);
postPointer(flags, app.pointerShape);
postPointer(flags, mem);
return;
}
uint32_t flags = 0;
PLGMPMemory mem = app.pointerMemory[app.pointerIndex];
PLGMPMemory mem;
if (app.pointerInfo.shapeUpdate)
{
mem = app.pointerShapeMemory[app.pointerShapeIndex];
if (++app.pointerShapeIndex == POINTER_SHAPE_BUFFERS)
app.pointerShapeIndex = 0;
}
else
{
mem = app.pointerMemory[app.pointerIndex];
if (++app.pointerIndex == LGMP_Q_POINTER_LEN)
app.pointerIndex = 0;
}
KVMFRCursor *cursor = lgmpHostMemPtr(mem);
if (app.pointerInfo.positionUpdate || newClient)
@ -390,16 +414,9 @@ static void sendPointer(bool newClient)
app.pointerShapeValid = true;
flags |= CURSOR_FLAG_SHAPE;
// retain this memory for new clients
app.pointerMemory[app.pointerIndex] = app.pointerShape;
app.pointerShape = mem;
}
// only advance if the pointer shape was not swapped out of the list
if ((flags & CURSOR_FLAG_SHAPE) == 0)
if (++app.pointerIndex == POINTER_SHAPE_BUFFERS)
app.pointerIndex = 0;
postPointer(flags, mem);
}
@ -525,24 +542,29 @@ int app_main(int argc, char * argv[])
goto fail_lgmp;
}
for(int i = 0; i < POINTER_SHAPE_BUFFERS; ++i)
for(int i = 0; i < LGMP_Q_POINTER_LEN; ++i)
{
if ((status = lgmpHostMemAlloc(app.lgmp, MAX_POINTER_SIZE, &app.pointerMemory[i])) != LGMP_OK)
if ((status = lgmpHostMemAlloc(app.lgmp, sizeof(KVMFRCursor), &app.pointerMemory[i])) != LGMP_OK)
{
DEBUG_ERROR("lgmpHostMemAlloc Failed (Pointer): %s", lgmpStatusString(status));
exitcode = LG_HOST_EXIT_FATAL;
goto fail_lgmp;
}
memset(lgmpHostMemPtr(app.pointerMemory[i]), 0, MAX_POINTER_SIZE);
memset(lgmpHostMemPtr(app.pointerMemory[i]), 0, sizeof(KVMFRCursor));
}
for(int i = 0; i < POINTER_SHAPE_BUFFERS; ++i)
{
if ((status = lgmpHostMemAlloc(app.lgmp, MAX_POINTER_SIZE, &app.pointerShapeMemory[i])) != LGMP_OK)
{
DEBUG_ERROR("lgmpHostMemAlloc Failed (Pointer Shapes): %s", lgmpStatusString(status));
exitcode = LG_HOST_EXIT_FATAL;
goto fail_lgmp;
}
memset(lgmpHostMemPtr(app.pointerShapeMemory[i]), 0, MAX_POINTER_SIZE);
}
app.pointerShapeValid = false;
if ((status = lgmpHostMemAlloc(app.lgmp, MAX_POINTER_SIZE, &app.pointerShape)) != LGMP_OK)
{
DEBUG_ERROR("lgmpHostMemAlloc Failed (Pointer Shape): %s", lgmpStatusString(status));
exitcode = LG_HOST_EXIT_FATAL;
goto fail_lgmp;
}
const long sz = sysinfo_getPageSize();
app.maxFrameSize = lgmpHostMemAvail(app.lgmp);
@ -728,9 +750,10 @@ fail_timer:
fail_lgmp:
for(int i = 0; i < LGMP_Q_FRAME_LEN; ++i)
lgmpHostMemFree(&app.frameMemory[i]);
for(int i = 0; i < POINTER_SHAPE_BUFFERS; ++i)
for(int i = 0; i < LGMP_Q_POINTER_LEN; ++i)
lgmpHostMemFree(&app.pointerMemory[i]);
lgmpHostMemFree(&app.pointerShape);
for(int i = 0; i < POINTER_SHAPE_BUFFERS; ++i)
lgmpHostMemFree(&app.pointerShapeMemory[i]);
lgmpHostFree(&app.lgmp);
fail_ivshmem: