Please consider the following formatting changes to #12515

Framework/Core/src/runDataProcessing.cxx

@@ -800,7 +800,7 @@ void processChildrenOutput(DriverInfo& driverInfo,
     }
 
     O2_SIGNPOST_ID_FROM_POINTER(sid, driver, &info);
-    O2_SIGNPOST_START(driver, sid, "bytes_processed", "bytes processed by " O2_ENG_TYPE(pid, "d"), info.pid);
+    O2_SIGNPOST_START(driver, sid, "bytes_processed", "bytes processed by %{xcode:pid}d", info.pid);
 
     std::string_view s = info.unprinted;
     size_t pos = 0;
@@ -848,7 +848,7 @@ void processChildrenOutput(DriverInfo& driverInfo,
     size_t oldSize = info.unprinted.size();
     info.unprinted = std::string(s);
     int64_t bytesProcessed = oldSize - info.unprinted.size();
-    O2_SIGNPOST_END(driver, sid, "bytes_processed", "bytes processed by " O2_ENG_TYPE(network - size - in - bytes, PRIi64), bytesProcessed);
+    O2_SIGNPOST_END(driver, sid, "bytes_processed", "bytes processed by %{xcode:network-size-in-bytes}" PRIi64, bytesProcessed);
   }
 }
 

Framework/Foundation/include/Framework/Signpost.h

@@ -12,13 +12,39 @@
 #define O2_FRAMEWORK_SIGNPOST_H_
 
 #include <atomic>
+#include <array>
 
 struct o2_log_handle_t {
   char const* name = nullptr;
   void* log = nullptr;
   o2_log_handle_t* next = nullptr;
 };
 
+// Helper function which replaces engineering types with a printf
+// compatible format string.
+template <auto N>
+constexpr auto remove_engineering_type(char const (&src)[N])
+{
+  std::array<char, N> res = {};
+  // do whatever string manipulation you want in res.
+  char* t = res.data();
+  for (int i = 0; i < N; ++i) {
+    if (src[i] == '%' && src[i + 1] == '{') {
+      *t++ = src[i];
+      while (src[i] != '}' && src[i] != 0) {
+        ++i;
+      }
+      if (src[i] == 0) {
+        *t = 0;
+        return res;
+      }
+    } else {
+      *t++ = src[i];
+    }
+  }
+  return res;
+}
+
 // Loggers registry is actually a feature available to all platforms
 // We use this to register the loggers and to walk over them.
 // So that also on mac we can have a list of all the registered loggers.
@@ -71,10 +97,10 @@ void* _o2_log_create(char const* name, char const* category);
 #define O2_LOG_DEBUG(log, ...) os_log_debug(private_o2_log_##log, __VA_ARGS__)
 #define O2_SIGNPOST_ID_FROM_POINTER(name, log, pointer) os_signpost_id_t name = os_signpost_id_make_with_pointer(private_o2_log_##log, pointer)
 #define O2_SIGNPOST_ID_GENERATE(name, log) os_signpost_id_t name = os_signpost_id_generate(private_o2_log_##log)
-#define O2_SIGNPOST_EVENT_EMIT(log, id, name, ...) os_signpost_event_emit(private_o2_log_##log, id, name, __VA_ARGS__)
-#define O2_SIGNPOST_START(log, id, name, ...) os_signpost_interval_begin(private_o2_log_##log, id, name, __VA_ARGS__)
-#define O2_SIGNPOST_END(log, id, name, ...) os_signpost_interval_end(private_o2_log_##log, id, name, __VA_ARGS__)
-#define O2_ENG_TYPE(x, what) "%{xcode:" #x "}" what
+// FIXME: use __VA_OPT__ when available in C++20
+#define O2_SIGNPOST_EVENT_EMIT(log, id, name, format, ...) os_signpost_event_emit(private_o2_log_##log, id, name, format, ##__VA_ARGS__)
+#define O2_SIGNPOST_START(log, id, name, format, ...) os_signpost_interval_begin(private_o2_log_##log, id, name, format, ##__VA_ARGS__)
+#define O2_SIGNPOST_END(log, id, name, format, ...) os_signpost_interval_end(private_o2_log_##log, id, name, format, ##__VA_ARGS__)
 
 #ifdef O2_SIGNPOST_IMPLEMENTATION
 /// We use a wrapper so that we can keep track of the logs.
@@ -465,10 +491,9 @@ void _o2_log_set_stacktrace(_o2_log_t* log, int stacktrace)
 #define O2_LOG_DEBUG(log, ...) O2_LOG_MACRO(__VA_ARGS__)
 #define O2_SIGNPOST_ID_FROM_POINTER(name, log, pointer) _o2_signpost_id_t name = _o2_signpost_id_make_with_pointer(private_o2_log_##log, pointer)
 #define O2_SIGNPOST_ID_GENERATE(name, log) _o2_signpost_id_t name = _o2_signpost_id_generate_local(private_o2_log_##log)
-#define O2_SIGNPOST_EVENT_EMIT(log, id, name, ...) _o2_signpost_event_emit(private_o2_log_##log, id, name, __VA_ARGS__)
-#define O2_SIGNPOST_START(log, id, name, ...) _o2_signpost_interval_begin(private_o2_log_##log, id, name, __VA_ARGS__)
-#define O2_SIGNPOST_END(log, id, name, ...) _o2_signpost_interval_end(private_o2_log_##log, id, name, __VA_ARGS__)
-#define O2_ENG_TYPE(x, what) "%" what
+#define O2_SIGNPOST_EVENT_EMIT(log, id, name, format, ...) _o2_signpost_event_emit(private_o2_log_##log, id, name, remove_engineering_type(format).data(), ##__VA_ARGS__)
+#define O2_SIGNPOST_START(log, id, name, format, ...) _o2_signpost_interval_begin(private_o2_log_##log, id, name, remove_engineering_type(format).data(), ##__VA_ARGS__)
+#define O2_SIGNPOST_END(log, id, name, format, ...) _o2_signpost_interval_end(private_o2_log_##log, id, name, remove_engineering_type(format).data(), ##__VA_ARGS__)
 #else // This is the release implementation, it does nothing.
 #define O2_DECLARE_DYNAMIC_LOG(x)
 #define O2_DECLARE_DYNAMIC_STACKTRACE_LOG(x)
@@ -478,10 +503,9 @@ void _o2_log_set_stacktrace(_o2_log_t* log, int stacktrace)
 #define O2_LOG_DEBUG(log, ...)
 #define O2_SIGNPOST_ID_FROM_POINTER(name, log, pointer)
 #define O2_SIGNPOST_ID_GENERATE(name, log)
-#define O2_SIGNPOST_EVENT_EMIT(log, id, name, ...)
-#define O2_SIGNPOST_START(log, id, name, ...)
-#define O2_SIGNPOST_END(log, id, name, ...)
-#define O2_ENG_TYPE(x)
+#define O2_SIGNPOST_EVENT_EMIT(log, id, name, format, ...)
+#define O2_SIGNPOST_START(log, id, name, format, ...)
+#define O2_SIGNPOST_END(log, id, name, format, ...)
 #endif
 
 #endif // O2_FRAMEWORK_SIGNPOST_H_

Framework/Foundation/test/test_Signpost.cxx

@@ -38,7 +38,7 @@ int main(int argc, char** argv)
 
   // This has an engineering type, which we will not use on Linux / FairLogger
   O2_SIGNPOST_ID_FROM_POINTER(id4, test_Signpost, &id3);
-  O2_SIGNPOST_START(test_Signpost, id4, "Test category", "A signpost with an engineering type formatter " O2_ENG_TYPE(size - in - bytes, "d"), 1);
+  O2_SIGNPOST_START(test_Signpost, id4, "Test category", "A signpost with an engineering type formatter %{size-in-bytes}d", 1);
   O2_SIGNPOST_END(test_Signpost, id4, "Test category", "A signpost interval from a pointer");
 
   O2_SIGNPOST_START(test_SignpostDynamic, id, "Test category", "This is dynamic signpost which you will not see, because they are off by default");

Framework/Foundation/test/test_SignpostLogger.cxx

@@ -46,7 +46,7 @@ int main(int argc, char** argv)
 
   // This has an engineering type, which we will not use on Linux / FairLogger
   O2_SIGNPOST_ID_FROM_POINTER(id4, test_Signpost, &id3);
-  O2_SIGNPOST_START(test_Signpost, id4, "Test category", "A signpost with an engineering type formatter " O2_ENG_TYPE(size - in - bytes, "d"), 1);
+  O2_SIGNPOST_START(test_Signpost, id4, "Test category", "A signpost with an engineering type formatter %{size-in-bytes}d", 1);
   O2_SIGNPOST_END(test_Signpost, id4, "Test category", "A signpost interval from a pointer");
 
   O2_SIGNPOST_START(test_SignpostDynamic, id, "Test category", "This is dynamic signpost which you will not see, because they are off by default");