Added experimental multi-thread input processing support.

This is disabled by default. It can be enabled by setting MULTITHREADED_INPUT to 1
in doxygen.h. Still has many data races, so don't use for anything other than development!

1 files changed, 12 insertions, 1 deletions

diff --git a/src/doxygen.h b/src/doxygen.h
index b824b54..99b5d6f 100644
--- a/src/doxygen.h
+++ b/src/doxygen.h
@@ -30,6 +30,18 @@
 #include "memberlist.h"
 #include "define.h"
 
+#define MULTITHREADED_INPUT 0
+
+#if MULTITHREADED_INPUT
+#define THREAD_LOCAL thread_local
+#define AtomicInt    std::atomic_int
+#define AtomicBool   std::atomic_bool
+#else
+#define THREAD_LOCAL
+#define AtomicInt    int
+#define AtomicBool   bool
+#endif
+
 class RefList;
 class PageSList;
 class PageSDict;
@@ -138,7 +150,6 @@ class Doxygen
     static bool                      generatingXmlOutput;
     static bool                      markdownSupport;
     static GenericsSDict            *genericsDict;
-    static Preprocessor             *preprocessor;
     static DefineList                macroDefinitions;
 };