From f285e0f5cc063e60b5c889ca5082cbd65add0843 Mon Sep 17 00:00:00 2001
From: Bartosz Taudul <wolf.pld@gmail.com>
Date: Tue, 13 Aug 2019 13:19:38 +0200
Subject: [PATCH] Save one byte on ContextSwitchData.

---
 server/TracyEvent.hpp  |  6 ++++--
 server/TracyWorker.cpp | 12 ++++++------
 2 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/server/TracyEvent.hpp b/server/TracyEvent.hpp
index bc33045c..a376cfd2 100644
--- a/server/TracyEvent.hpp
+++ b/server/TracyEvent.hpp
@@ -222,11 +222,13 @@ enum { CrashEventSize = sizeof( CrashEvent ) };
 
 struct ContextSwitchData
 {
+    static uint8_t Reason( const ContextSwitchData& cs ) { return cs.data & 0xF; }
+    static uint8_t State( const ContextSwitchData& cs ) { return cs.data >> 4; }
+
     int64_t start;
     int64_t end;
     uint8_t cpu;
-    int8_t reason;
-    int8_t state;
+    uint8_t data;
 };
 
 enum { ContextSwitchDataSize = sizeof( ContextSwitchData ) };
diff --git a/server/TracyWorker.cpp b/server/TracyWorker.cpp
index 6e778e54..03ad19a4 100644
--- a/server/TracyWorker.cpp
+++ b/server/TracyWorker.cpp
@@ -1168,7 +1168,7 @@ Worker::Worker( FileRead& f, EventType::Type eventMask )
                 {
                     ptr->start = ReadTimeOffset( f, refTime );
                     ptr->end = ReadTimeOffset( f, refTime );
-                    f.Read( &ptr->cpu, sizeof( ptr->cpu ) + sizeof( ptr->reason ) + sizeof( ptr->state ) );
+                    f.Read( &ptr->cpu, sizeof( ptr->cpu ) + sizeof( ptr->data ) );
                     ptr++;
                 }
                 m_data.ctxSwitch.emplace( thread, data );
@@ -3727,8 +3727,9 @@ void Worker::ProcessContextSwitch( const QueueContextSwitch& ev )
             auto& item = data.back();
             assert( item.start <= time );
             item.end = time;
-            item.reason = ev.reason;
-            item.state = ev.state;
+            assert( ( ev.reason & 0xF ) == ev.reason );
+            assert( ( ev.state & 0xF ) == ev.state );
+            item.data = ev.reason | ( ev.state << 4 );
         }
     }
     if( ev.newThread != 0 )
@@ -3745,8 +3746,7 @@ void Worker::ProcessContextSwitch( const QueueContextSwitch& ev )
         item.start = time;
         item.end = -1;
         item.cpu = ev.cpu;
-        item.reason = -1;
-        item.state = -1;
+        item.data = ~0;
     }
 }
 
@@ -4497,7 +4497,7 @@ void Worker::Write( FileWrite& f )
         {
             WriteTimeOffset( f, refTime, cs.start );
             WriteTimeOffset( f, refTime, cs.end );
-            f.Write( &cs.cpu, sizeof( cs.cpu ) + sizeof( cs.reason ) + sizeof( cs.state ) );
+            f.Write( &cs.cpu, sizeof( cs.cpu ) + sizeof( cs.data ) );
         }
     }
 }