ropeimpl.h: Check __STL_PTHREADS instead of _PTHREADS.

	* ropeimpl.h: Check __STL_PTHREADS instead of _PTHREADS.
	* stl_alloc.h: Ditto.
	* stl_config.h: Ditto.
	* stl_rope.h: Ditto.
	* stl_config.h: include <_G_config.h> if __GNUG__ is defined.
	(__STL_PTHREADS): Defined if _PTHREADS is defined or
	__GLIBC__ >= 2.

From-SVN: r18138

libstdc++/stl/ChangeLog

+Fri Feb 20 16:15:05 1998  H.J. Lu  (hjl@gnu.org)
+			  Jason Merrill  <jason@yorick.cygnus.com>
+
+	* ropeimpl.h: Check __STL_PTHREADS instead of _PTHREADS.
+	* stl_alloc.h: Ditto.
+	* stl_config.h: Ditto.
+	* stl_rope.h: Ditto.
+
+	* stl_config.h: include <_G_config.h> if __GNUG__ is defined.
+	(__STL_PTHREADS): Defined if _PTHREADS is defined or
+	__GLIBC__ >= 2.
+
+Tue Jan 27 12:01:25 1998  Jason Merrill  <jason@yorick.cygnus.com>
+
+	* stl_algo.h (__lg): Fix for n == 0.
+
 Sat Nov  8 00:45:17 1997  Jason Merrill  <jason@yorick.cygnus.com>
 
 	* stl_hash_set.h (swap): Fix typo.

libstdc++/stl/ropeimpl.h

@@ -1429,7 +1429,7 @@ rope<charT, Alloc>::rope(size_t n, charT c)
 
 template<class charT, class Alloc> charT rope<charT,Alloc>::empty_c_str[1];
 
-# ifdef _PTHREADS
+# ifdef __STL_PTHREADS
     template<class charT, class Alloc>
     pthread_mutex_t rope<charT,Alloc>::swap_lock = PTHREAD_MUTEX_INITIALIZER;
 # endif

libstdc++/stl/stl_algo.h

@@ -1004,7 +1004,7 @@ void __final_insertion_sort(RandomAccessIterator first,
 template <class Size>
 inline Size __lg(Size n) {
   Size k;
-  for (k = 0; n != 1; n >>= 1) ++k;
+  for (k = 0; n > 1; n >>= 1) ++k;
   return k;
 }
 

libstdc++/stl/stl_alloc.h

@@ -61,12 +61,12 @@
 #  define __RESTRICT
 #endif
 
-#if !defined(_PTHREADS) && !defined(_NOTHREADS) \
+#if !defined(__STL_PTHREADS) && !defined(_NOTHREADS) \
  && !defined(__STL_SGI_THREADS) && !defined(__STL_WIN32THREADS)
 #   define _NOTHREADS
 #endif
 
-# ifdef _PTHREADS
+# ifdef __STL_PTHREADS
     // POSIX Threads
     // This is dubious, since this is likely to be a high contention
     // lock.   Performance may not be adequate.
@@ -357,7 +357,7 @@ private:
     static inline void __unlock(volatile unsigned long *);
 # endif
 
-# ifdef _PTHREADS
+# ifdef __STL_PTHREADS
     static pthread_mutex_t __node_allocator_lock;
 # endif
 
@@ -558,7 +558,7 @@ __default_alloc_template<threads, inst>::reallocate(void *p,
     return(result);
 }
 
-#ifdef _PTHREADS
+#ifdef __STL_PTHREADS
     template <bool threads, int inst>
     pthread_mutex_t
     __default_alloc_template<threads, inst>::__node_allocator_lock

libstdc++/stl/stl_config.h

@@ -71,6 +71,10 @@
 //  (19) Defines __stl_assert either as a test or as a null macro,
 //       depending on whether or not __STL_ASSERTIONS is defined.
 
+#ifdef _PTHREADS
+#   define __STL_PTHREADS
+#endif
+
 # if defined(__sgi) && !defined(__GNUC__)
 #   if !defined(_BOOL)
 #     define __STL_NEED_BOOL
@@ -93,13 +97,14 @@
 #   if (_COMPILER_VERSION >= 721) && defined(_NAMESPACES)
 #     define __STL_USE_NAMESPACES
 #   endif 
-#   if !defined(_NOTHREADS) && !defined(_PTHREADS)
+#   if !defined(_NOTHREADS) && !defined(__STL_PTHREADS)
 #     define __STL_SGI_THREADS
 #   endif
 # endif
 
 # ifdef __GNUC__
-#   if 0 && (__GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8))
+#   include <_G_config.h>
+#   if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8)
 #     define __STL_STATIC_TEMPLATE_MEMBER_BUG
 #     define __STL_NEED_TYPENAME
 #     define __STL_NEED_EXPLICIT
@@ -109,6 +114,9 @@
 #     define __STL_EXPLICIT_FUNCTION_TMPL_ARGS
 #     define __STL_MEMBER_TEMPLATES
 #   endif
+#   if !defined(_NOTHREADS) && __GLIBC__ >= 2
+#     define __STL_PTHREADS
+#   endif
 #   ifdef __EXCEPTIONS
 #     define __STL_USE_EXCEPTIONS
 #   endif

libstdc++/stl/stl_rope.h

@@ -306,7 +306,7 @@ struct __rope_RopeBase {
             {
                 return InterlockedDecrement(&refcount);
             }
-#	elif defined(_PTHREADS)
+#	elif defined(__STL_PTHREADS)
 	    // This should be portable, but performance is expected
 	    // to be quite awful.  This really needs platform specific
 	    // code.
@@ -939,7 +939,7 @@ class rope {
 	    static cstrptr atomic_swap(cstrptr *p, cstrptr q) {
 		return (cstrptr) InterlockedExchange((LPLONG)p, (LONG)q);
 	    }
-#	elif defined(_PTHREADS)
+#	elif defined(__STL_PTHREADS)
 	    // This should be portable, but performance is expected
 	    // to be quite awful.  This really needs platform specific
 	    // code.