ActorSystem memlog use std atomic (#644)

Author: kitaisreal

ydb/library/actors/memory_log/memlog.cpp

@@ -98,7 +98,7 @@ unsigned TMemoryLog::GetSelfCpu() noexcept {
 #endif
 }
 
-TMemoryLog* TMemoryLog::MemLogBuffer = nullptr;
+std::atomic<TMemoryLog*> TMemoryLog::MemLogBuffer = nullptr;
 Y_POD_THREAD(TThread::TId)
 TMemoryLog::LogThreadId;
 char* TMemoryLog::LastMarkIsHere = nullptr;

ydb/library/actors/memory_log/memlog.h

@@ -42,7 +42,7 @@ class TMemoryLog {
     static constexpr size_t LAST_MARK_SIZE = sizeof(DEFAULT_LAST_MARK);
 
     inline static TMemoryLog* GetMemoryLogger() noexcept {
-        return AtomicGet(MemLogBuffer);
+        return MemLogBuffer.load(std::memory_order_acquire);
     }
 
     void* GetWriteBuffer(size_t amount) noexcept;
@@ -63,11 +63,11 @@ class TMemoryLog {
         size_t totalSize = DEFAULT_TOTAL_SIZE,
         size_t grainSize = DEFAULT_GRAIN_SIZE)
         Y_COLD {
-        if (AtomicGet(MemLogBuffer) != nullptr) {
+        if (MemLogBuffer.load(std::memory_order_acquire) != nullptr) {
             return;
         }
 
-        AtomicSet(MemLogBuffer, new TMemoryLog(totalSize, grainSize));
+        MemLogBuffer.store(new TMemoryLog(totalSize, grainSize), std::memory_order_release);
     }
 
     static std::atomic<bool> PrintLastMark;
@@ -163,7 +163,7 @@ class TMemoryLog {
 
     static unsigned GetSelfCpu() noexcept;
 
-    static TMemoryLog* MemLogBuffer;
+    static std::atomic<TMemoryLog*> MemLogBuffer;
     static Y_POD_THREAD(TThread::TId) LogThreadId;
     static char* LastMarkIsHere;
 };