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Backends: Metal: Add dispatch synchronization. (#5447)

This commit is contained in:
luigifcruz 2022-07-02 14:24:25 -07:00 committed by ocornut
parent 0b2da67912
commit 82e10f1b61
2 changed files with 30 additions and 21 deletions
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50
backends/imgui_impl_metal.mm
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@ -12,6 +12,8 @@
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2022-07-05: Metal: Add dispatch synchronization.
// 2022-06-30: Metal: Use __bridge for ARC based systems.
// 2022-06-01: Metal: Fixed null dereference on exit inside command buffer completion handler.
// 2022-04-27: Misc: Store backend data in a per-context struct, allowing to use this backend with multiple contexts.
// 2022-01-03: Metal: Ignore ImDrawCmd where ElemCount == 0 (very rare but can technically be manufactured by user code).
@ -296,8 +298,11 @@ void ImGui_ImplMetal_RenderDrawData(ImDrawData* drawData, id<MTLCommandBuffer> c
ImGui_ImplMetal_Data* bd = ImGui_ImplMetal_GetBackendData();
if (bd != NULL)
{
[bd->SharedMetalContext.bufferCache addObject:vertexBuffer];
[bd->SharedMetalContext.bufferCache addObject:indexBuffer];
@synchronized(bd->SharedMetalContext.bufferCache)
{
[bd->SharedMetalContext.bufferCache addObject:vertexBuffer];
[bd->SharedMetalContext.bufferCache addObject:indexBuffer];
}
}
});
}];
@ -440,28 +445,31 @@ void ImGui_ImplMetal_DestroyDeviceObjects()
{
uint64_t now = GetMachAbsoluteTimeInSeconds();
// Purge old buffers that haven't been useful for a while
if (now - self.lastBufferCachePurge > 1.0)
@synchronized(self.bufferCache)
{
NSMutableArray* survivors = [NSMutableArray array];
// Purge old buffers that haven't been useful for a while
if (now - self.lastBufferCachePurge > 1.0)
{
NSMutableArray* survivors = [NSMutableArray array];
for (MetalBuffer* candidate in self.bufferCache)
if (candidate.lastReuseTime > self.lastBufferCachePurge)
[survivors addObject:candidate];
self.bufferCache = [survivors mutableCopy];
self.lastBufferCachePurge = now;
}
// See if we have a buffer we can reuse
MetalBuffer* bestCandidate = nil;
for (MetalBuffer* candidate in self.bufferCache)
if (candidate.lastReuseTime > self.lastBufferCachePurge)
[survivors addObject:candidate];
self.bufferCache = [survivors mutableCopy];
self.lastBufferCachePurge = now;
}
if (candidate.buffer.length >= length && (bestCandidate == nil || bestCandidate.lastReuseTime > candidate.lastReuseTime))
bestCandidate = candidate;
// See if we have a buffer we can reuse
MetalBuffer* bestCandidate = nil;
for (MetalBuffer* candidate in self.bufferCache)
if (candidate.buffer.length >= length && (bestCandidate == nil || bestCandidate.lastReuseTime > candidate.lastReuseTime))
bestCandidate = candidate;
if (bestCandidate != nil)
{
[self.bufferCache removeObject:bestCandidate];
bestCandidate.lastReuseTime = now;
return bestCandidate;
if (bestCandidate != nil)
{
[self.bufferCache removeObject:bestCandidate];
bestCandidate.lastReuseTime = now;
return bestCandidate;
}
}
// No luck; make a new buffer

1
docs/CHANGELOG.txt
View File

@ -43,6 +43,7 @@ Other Changes:
Enter keep the input active and select all text.
- Misc: io.Framerate moving average now converge in 60 frames instead of 120. (#5236, #4138)
- Backends: Metal: Use __bridge for ARC based systems. (#5403) [@stack]
- Backends: Metal: Add dispatch synchronization. (#5447) [@luigifcruz]
- Backends: OSX: Fixes to support full app creation in C++. (#5403) [@stack]