libCom: add EPICS_FUNCTION

Automatic macro which expands to the current function name.
Useful in debug prints.

src/libCom/osi/compiler/clang/compilerSpecific.h

@@ -26,6 +26,9 @@
 #define EPICS_ALWAYS_INLINE __inline__
 #endif
 
+/* Expands to a 'const char*' which describes the name of the current function scope */
+#define EPICS_FUNCTION __PRETTY_FUNCTION__
+
 #ifdef __cplusplus
 
 /*

src/libCom/osi/compiler/gcc/compilerSpecific.h

@@ -29,6 +29,9 @@
 #else
 #  define EPICS_ALWAYS_INLINE __inline__
 #endif
+
+/* Expands to a 'const char*' which describes the name of the current function scope */
+#define EPICS_FUNCTION __PRETTY_FUNCTION__
  
 #ifdef __cplusplus
 

src/libCom/osi/compiler/msvc/compilerSpecific.h

@@ -26,6 +26,9 @@
 #define EPICS_ALWAYS_INLINE __inline
 #endif
 
+/* Expands to a 'const char*' which describes the name of the current function scope */
+#define EPICS_FUNCTION __FUNCTION__
+
 #ifdef __cplusplus
 
 /*

src/libCom/osi/compilerDependencies.h

@@ -62,4 +62,13 @@
 #   define EPICS_UNUSED
 #endif
 
+#ifndef EPICS_FUNCTION
+#if (defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901)) || (defined(__cplusplus) && __cplusplus>=201103L)
+#  define EPICS_FUNCTION __func__
+#else
+/* Expands to a 'const char*' which describes the name of the current function scope */
+#  define EPICS_FUNCTION ("<unknown function>")
+#endif
+#endif
+
 #endif  /* ifndef compilerDependencies_h */

src/libCom/test/epicsAtomicTest.cpp

@@ -406,6 +406,7 @@ MAIN ( epicsAtomicTest )
 {
 
     testPlan ( 50 );
+    testDiag("In %s", EPICS_FUNCTION);
     testClassify ();
     testBasic();
 #if defined(__rtems__)