flewkey/cuberite-2a
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Fixed a race condition between chunk loader and generator.

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When using ChunkWorx to generate multiple chunks, the server would sometimes fail an assert because it would generate a chunk even when it was successfully loaded. This was caused by chunks queued in cWorld's m_SetChunkDataQueue and thus being marked as "InQueue" although they were already loaded.

Solved by adding a new parameter to chunk coord callbacks specifying whether the operation succeeded or failed, and using that instead of the chunk presence flag to decide whether to generate or not.
This commit is contained in:
Mattes D
2015-10-04 14:06:37 +02:00
parent d8127aa228
commit 9da404ea2d
10 changed files with 45 additions and 65 deletions
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12
src/Generating/ChunkGenerator.cpp
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@@ -248,13 +248,13 @@ void cChunkGenerator::Execute(void)
LastReportTick = clock();
}
// Skip the chunk if it's already generated and regeneration is not forced:
// Skip the chunk if it's already generated and regeneration is not forced. Report as success:
if (!item.m_ForceGenerate && m_ChunkSink->IsChunkValid(item.m_ChunkX, item.m_ChunkZ))
{
LOGD("Chunk [%d, %d] already generated, skipping generation", item.m_ChunkX, item.m_ChunkZ);
if (item.m_Callback != nullptr)
{
item.m_Callback->Call(item.m_ChunkX, item.m_ChunkZ);
item.m_Callback->Call(item.m_ChunkX, item.m_ChunkZ, true);
}
continue;
}
@@ -265,7 +265,7 @@ void cChunkGenerator::Execute(void)
LOGWARNING("Chunk generator overloaded, skipping chunk [%d, %d]", item.m_ChunkX, item.m_ChunkZ);
if (item.m_Callback != nullptr)
{
item.m_Callback->Call(item.m_ChunkX, item.m_ChunkZ);
item.m_Callback->Call(item.m_ChunkX, item.m_ChunkZ, false);
}
continue;
}
@@ -275,7 +275,7 @@ void cChunkGenerator::Execute(void)
DoGenerate(item.m_ChunkX, item.m_ChunkZ);
if (item.m_Callback != nullptr)
{
item.m_Callback->Call(item.m_ChunkX, item.m_ChunkZ);
item.m_Callback->Call(item.m_ChunkX, item.m_ChunkZ, true);
}
NumChunksGenerated++;
} // while (!bStop)
@@ -296,8 +296,8 @@ void cChunkGenerator::DoGenerate(int a_ChunkX, int a_ChunkZ)
m_PluginInterface->CallHookChunkGenerated(ChunkDesc);
#ifdef _DEBUG
// Verify that the generator has produced valid data:
ChunkDesc.VerifyHeightmap();
// Verify that the generator has produced valid data:
ChunkDesc.VerifyHeightmap();
#endif
m_ChunkSink->OnChunkGenerated(ChunkDesc);