flewkey/cuberite-2a
1
0
Fork 0
Code Releases Activity

Fixed a race condition between chunk loader and generator.

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

32
src/WorldStorage/WorldStorage.cpp
View File

@@ -164,32 +164,6 @@ void cWorldStorage::QueueSaveChunk(int a_ChunkX, int a_ChunkZ, cChunkCoordCallba
void cWorldStorage::UnqueueLoad(int a_ChunkX, int a_ChunkZ)
{
m_LoadQueue.RemoveIf([=](cChunkCoordsWithCallback & a_Item)
{
return (a_Item.m_ChunkX == a_ChunkX) && (a_Item.m_ChunkZ == a_ChunkZ);
}
);
}
void cWorldStorage::UnqueueSave(const cChunkCoords & a_Chunk)
{
m_SaveQueue.RemoveIf([=](cChunkCoordsWithCallback & a_Item)
{
return (a_Item.m_ChunkX == a_Chunk.m_ChunkX) && (a_Item.m_ChunkZ == a_Chunk.m_ChunkZ);
}
);
}
void cWorldStorage::InitSchemas(int a_StorageCompressionFactor)
{
// The first schema added is considered the default
@@ -266,7 +240,7 @@ bool cWorldStorage::LoadOneChunk(void)
// Call the callback, if specified:
if (ToLoad.m_Callback != nullptr)
{
ToLoad.m_Callback->Call(ToLoad.m_ChunkX, ToLoad.m_ChunkZ);
ToLoad.m_Callback->Call(ToLoad.m_ChunkX, ToLoad.m_ChunkZ, res);
}
return res;
}
@@ -286,19 +260,21 @@ bool cWorldStorage::SaveOneChunk(void)
}
// Save the chunk, if it's valid:
bool Status = false;
if (m_World->IsChunkValid(ToSave.m_ChunkX, ToSave.m_ChunkZ))
{
m_World->MarkChunkSaving(ToSave.m_ChunkX, ToSave.m_ChunkZ);
if (m_SaveSchema->SaveChunk(cChunkCoords(ToSave.m_ChunkX, ToSave.m_ChunkZ)))
{
m_World->MarkChunkSaved(ToSave.m_ChunkX, ToSave.m_ChunkZ);
Status = true;
}
}
// Call the callback, if specified:
if (ToSave.m_Callback != nullptr)
{
ToSave.m_Callback->Call(ToSave.m_ChunkX, ToSave.m_ChunkZ);
ToSave.m_Callback->Call(ToSave.m_ChunkX, ToSave.m_ChunkZ, Status);
}
return true;
}

10
src/WorldStorage/WorldStorage.h
View File

@@ -63,13 +63,15 @@ public:
cWorldStorage(void);
~cWorldStorage();
/** Queues a chunk to be loaded, asynchronously.
The callback, if specified, will be called with the result of the load operation. */
void QueueLoadChunk(int a_ChunkX, int a_ChunkZ, cChunkCoordCallback * a_Callback = nullptr);
/** Queues a chunk to be saved, asynchronously.
The callback, if specified, will be called with the result of the save operation. */
void QueueSaveChunk(int a_ChunkX, int a_ChunkZ, cChunkCoordCallback * a_Callback = nullptr);
void UnqueueLoad(int a_ChunkX, int a_ChunkZ);
void UnqueueSave(const cChunkCoords & a_Chunk);
bool Start(cWorld * a_World, const AString & a_StorageSchemaName, int a_StorageCompressionFactor); // Hide the cIsThread's Start() method, we need to provide args
void Stop(void); // Hide the cIsThread's Stop() method, we need to signal the event
void WaitForFinish(void);