AP_HAL_Linux: unify singleton naming to _singleton and get_singleton()

libraries/AP_HAL_Linux/Perf.cpp

@@ -35,7 +35,7 @@ using namespace Linux;
 
 static const AP_HAL::HAL &hal = AP_HAL::get_HAL();
 
-Perf *Perf::_instance;
+Perf *Perf::_singleton;
 
 static inline uint64_t now_nsec()
 {
@@ -44,13 +44,13 @@ static inline uint64_t now_nsec()
     return ts.tv_nsec + (ts.tv_sec * AP_NSEC_PER_SEC);
 }
 
-Perf *Perf::get_instance()
+Perf *Perf::get_singleton()
 {
-    if (!_instance) {
-        _instance = new Perf();
+    if (!_singleton) {
+        _singleton = new Perf();
     }
 
-    return _instance;
+    return _singleton;
 }
 
 void Perf::_debug_counters()

libraries/AP_HAL_Linux/Perf.h

@@ -64,7 +64,7 @@ class Perf {
 public:
     ~Perf();
 
-    static Perf *get_instance();
+    static Perf *get_singleton();
 
     perf_counter_t add(perf_counter_type type, const char *name);
 
@@ -75,7 +75,7 @@ public:
     unsigned int get_update_count() { return _update_count; }
 
 private:
-    static Perf *_instance;
+    static Perf *_singleton;
 
     Perf();
 

libraries/AP_HAL_Linux/Util.h

@@ -75,22 +75,22 @@ public:
 
     perf_counter_t perf_alloc(enum perf_counter_type t, const char *name) override
     {
-        return Perf::get_instance()->add(t, name);
+        return Perf::get_singleton()->add(t, name);
     }
 
     void perf_begin(perf_counter_t perf) override
     {
-        return Perf::get_instance()->begin(perf);
+        return Perf::get_singleton()->begin(perf);
     }
 
     void perf_end(perf_counter_t perf) override
     {
-        return Perf::get_instance()->end(perf);
+        return Perf::get_singleton()->end(perf);
     }
 
     void perf_count(perf_counter_t perf) override
     {
-        return Perf::get_instance()->count(perf);
+        return Perf::get_singleton()->count(perf);
     }
 
     int get_hw_arm32();