Revert "Logging API changes"

This is causing perf impact, so reverting until we figure out
a lower-impact solution.

This reverts commit 1be3e5771a.

simgear/debug/BufferedLogCallback.cxx

@@ -52,7 +52,7 @@ BufferedLogCallback::BufferedLogCallback(sgDebugClass c, sgDebugPriority p) :
 
 BufferedLogCallback::~BufferedLogCallback()
 {
-    for (unsigned char* msg : d->m_buffer) {
+    BOOST_FOREACH(unsigned char* msg, d->m_buffer) {
         free(msg);
     }
 }

simgear/debug/BufferedLogCallback.hxx

@@ -41,8 +41,8 @@ public:
     /// for broken PUI behaviour, it can be removed once PUI is gone.
     void truncateAt(unsigned int);
     
-    void operator()(sgDebugClass c, sgDebugPriority p,
+    virtual void operator()(sgDebugClass c, sgDebugPriority p, 
-        const char* file, int line, const std::string& aMessage) override;
+        const char* file, int line, const std::string& aMessage);
     
     /**
      * read the stamp value associated with the log buffer. This is

simgear/debug/logstream.cxx

@@ -398,8 +398,6 @@ public:
 	/// and hence should dynamically reflect console logging settings
 	CallbackVec m_consoleCallbacks;
 
-    std::vector<std::string> m_popupMessages;
-
     sgDebugClass m_logClass;
     sgDebugPriority m_logPriority;
     bool m_isRunning = false;
@@ -508,11 +506,25 @@ public:
         PauseThread pause(this);
         m_logPriority = p;
         m_logClass = c;
-        for (auto cb : m_consoleCallbacks) {
+		BOOST_FOREACH(simgear::LogCallback* cb, m_consoleCallbacks) {
 	        cb->setLogLevels(c, p);
 		}
     }
 
+    bool would_log( sgDebugClass c, sgDebugPriority p ) const
+    {
+        // Testing mode, so always log.
+        if (m_testMode) return true;
+
+        // SG_OSG (OSG notify) - will always be displayed regardless of FG log settings as OSG log level is configured 
+        // separately and thus it makes more sense to allow these message through.
+        if (p == SG_OSG) return true;
+
+        p = translatePriority(p);
+        if (p >= SG_INFO) return true;
+        return ((c & m_logClass) != 0 && p >= m_logPriority);
+    }
+
     void log( sgDebugClass c, sgDebugPriority p,
             const char* fileName, int line, const std::string& msg)
     {
@@ -548,6 +560,7 @@ logstream::logstream()
 
 logstream::~logstream()
 {
+    popup_msgs.clear();
     d->stop();
 }
 
@@ -585,10 +598,6 @@ logstream::log( sgDebugClass c, sgDebugPriority p,
 
 void logstream::hexdump(sgDebugClass c, sgDebugPriority p, const char* fileName, int line, const void *mem, unsigned int len, unsigned int columns)
 {
-    if (((c & d->m_logClass) == 0) || (p < d->m_logPriority)) {
-        return;
-    }
-    
     unsigned int i, j;
     char temp[3000], temp1[3000];
     *temp = 0;
@@ -644,17 +653,17 @@ void logstream::hexdump(sgDebugClass c, sgDebugPriority p, const char* fileName,
 void
 logstream::popup( const std::string& msg)
 {
-    d->m_popupMessages.push_back(msg);
+    popup_msgs.push_back(msg);
 }
 
 std::string
 logstream::get_popup()
 {
     std::string rv = "";
-    if (!d->m_popupMessages.empty())
+    if (!popup_msgs.empty())
     {
-        rv = d->m_popupMessages.front();
+        rv = popup_msgs.front();
-        d->m_popupMessages.erase(d->m_popupMessages.begin());
+        popup_msgs.erase(popup_msgs.begin());
     }
     return rv;
 }
@@ -662,7 +671,13 @@ logstream::get_popup()
 bool
 logstream::has_popup()
 {
-    return !d->m_popupMessages.empty();
+    return (popup_msgs.size() > 0) ? true : false;
+}
+
+bool
+logstream::would_log( sgDebugClass c, sgDebugPriority p ) const
+{
+    return d->would_log(c,p);
 }
 
 sgDebugClass

simgear/debug/logstream.hxx

@@ -29,6 +29,7 @@
 #include <simgear/debug/debug_types.h>
 
 #include <sstream>
+#include <vector>
 #include <memory>
 
 // forward decls
@@ -92,6 +93,8 @@ public:
      */
     void setLogLevels( sgDebugClass c, sgDebugPriority p );
 
+    bool would_log(  sgDebugClass c, sgDebugPriority p ) const;
+
     void logToFile( const SGPath& aPath, sgDebugClass c, sgDebugPriority p );
 
     void set_log_priority( sgDebugPriority p);
@@ -176,6 +179,8 @@ private:
     // constructor
     logstream();
 
+    std::vector<std::string> popup_msgs;
+
     class LogStreamPrivate;
 
     std::unique_ptr<LogStreamPrivate> d;
@@ -192,17 +197,17 @@ logstream& sglog();
  * @param M message
  */
 # define SG_LOGX(C,P,M) \
-    do {                                                 \
+    do { if(sglog().would_log(C,P)) {                         \
         std::ostringstream os; os << M;                  \
         sglog().log(C, P, __FILE__, __LINE__, os.str()); \
         if ((P) == SG_POPUP) sglog().popup(os.str());    \
-    } while(0)
+    } } while(0)
 #ifdef FG_NDEBUG
 # define SG_LOG(C,P,M)	do { if((P) == SG_POPUP) SG_LOGX(C,P,M) } while(0)
 # define SG_HEXDUMP(C,P,MEM,LEN)
 #else
 # define SG_LOG(C,P,M)	SG_LOGX(C,P,M)
-# define SG_LOG_HEXDUMP(C,P,MEM,LEN) sglog().hexdump(C, P, __FILE__, __LINE__, MEM, LEN)
+# define SG_LOG_HEXDUMP(C,P,MEM,LEN) if(sglog().would_log(C,P)) sglog().hexdump(C, P, __FILE__, __LINE__, MEM, LEN)
 #endif
 
 #define SG_ORIGIN __FILE__ ":" SG_STRINGIZE(__LINE__)