refactor: move load block thread into ChainstateManager

fanquake · MarcoFalke · fanquake · commit e3341dfaf714 · 2021-02-02T09:22:06.000+08:00
This is a diff of Marcos from #19197, which probably should have just been used at the time. After this change, and #21016, we'll have no more global thread(Group)s hanging out in init. Co-authored-by: MarcoFalke <falke.marco@gmail.com>
diff --git a/src/init.cpp b/src/init.cpp
@@ -154,8 +154,6 @@ static fs::path GetPidFile(const ArgsManager& args)
 
 static std::unique_ptr<ECCVerifyHandle> globalVerifyHandle;
 
-static std::thread g_load_block;
-
 void Interrupt(NodeContext& node)
 {
     InterruptHTTPServer();
@@ -219,7 +217,7 @@ void Shutdown(NodeContext& node)
     // After everything has been shut down, but before things get flushed, stop the
     // CScheduler/checkqueue, scheduler and load block thread.
     if (node.scheduler) node.scheduler->stop();
-    if (g_load_block.joinable()) g_load_block.join();
+    if (node.chainman && node.chainman->m_load_block.joinable()) node.chainman->m_load_block.join();
     StopScriptCheckWorkerThreads();
 
     // After the threads that potentially access these pointers have been stopped,
@@ -1862,7 +1860,7 @@ bool AppInitMain(const util::Ref& context, NodeContext& node, interfaces::BlockA
         vImportFiles.push_back(strFile);
     }
 
-    g_load_block = std::thread(&TraceThread<std::function<void()>>, "loadblk", [=, &chainman, &args] {
+    chainman.m_load_block = std::thread(&TraceThread<std::function<void()>>, "loadblk", [=, &chainman, &args] {
         ThreadImport(chainman, vImportFiles, args);
     });
 
diff --git a/src/validation.h b/src/validation.h
@@ -31,6 +31,7 @@
 #include <set>
 #include <stdint.h>
 #include <string>
+#include <thread>
 #include <utility>
 #include <vector>
 
@@ -839,6 +840,7 @@ class ChainstateManager
     friend CChain& ChainActive();
 
 public:
+    std::thread m_load_block;
     //! A single BlockManager instance is shared across each constructed
     //! chainstate to avoid duplicating block metadata.
     BlockManager m_blockman GUARDED_BY(::cs_main);
