* include/bits/random.h (random_device): Move implementation to...

	* src/c++11/random.cc: ...here.  New file.
	* config/abi/pre/gnu.ver: Add new version GLIBCXX_3.4.18.  Export
	std::random_device::* symbols.
	* config/abi/post/x86_64-linux-gnu/baseline_symbols.txt: Generated.
	* src/c++11/Makefile.am (sources): Add random.cc.
	* src/c++11/Makefile.in: Regenerated.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@190787 138bc75d-0d04-0410-961f-82ee72b054a4

3 files changed, 163 insertions, 8 deletions

diff --git a/libstdc++-v3/src/c++11/Makefile.am b/libstdc++-v3/src/c++11/Makefile.am
index e8a4d3a66f9..69eb5b6dac6 100644
--- a/libstdc++-v3/src/c++11/Makefile.am
+++ b/libstdc++-v3/src/c++11/Makefile.am
@@ -41,6 +41,7 @@ sources = \
 	limits.cc \
 	mutex.cc \
 	placeholders.cc \
+	random.cc \
 	regex.cc  \
 	shared_ptr.cc \
 	system_error.cc \
diff --git a/libstdc++-v3/src/c++11/Makefile.in b/libstdc++-v3/src/c++11/Makefile.in
index 0c63c514741..37b9ea0fd8b 100644
--- a/libstdc++-v3/src/c++11/Makefile.in
+++ b/libstdc++-v3/src/c++11/Makefile.in
@@ -1,9 +1,9 @@
-# Makefile.in generated by automake 1.11.1 from Makefile.am.
+# Makefile.in generated by automake 1.11.3 from Makefile.am.
 # @configure_input@
 
 # Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
-# 2003, 2004, 2005, 2006, 2007, 2008, 2009  Free Software Foundation,
-# Inc.
+# 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software
+# Foundation, Inc.
 # This Makefile.in is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.
@@ -68,8 +68,8 @@ LTLIBRARIES = $(noinst_LTLIBRARIES)
 libc__11convenience_la_LIBADD =
 am__objects_1 = chrono.lo condition_variable.lo debug.lo \
 	functexcept.lo functional.lo future.lo hash_c++0x.lo \
-	hashtable_c++0x.lo limits.lo mutex.lo placeholders.lo regex.lo \
-	shared_ptr.lo system_error.lo thread.lo
+	hashtable_c++0x.lo limits.lo mutex.lo placeholders.lo \
+	random.lo regex.lo shared_ptr.lo system_error.lo thread.lo
 @ENABLE_EXTERN_TEMPLATE_TRUE@am__objects_2 = fstream-inst.lo \
 @ENABLE_EXTERN_TEMPLATE_TRUE@	string-inst.lo wstring-inst.lo
 am_libc__11convenience_la_OBJECTS = $(am__objects_1) $(am__objects_2)
@@ -309,6 +309,7 @@ sources = \
 	limits.cc \
 	mutex.cc \
 	placeholders.cc \
+	random.cc \
 	regex.cc  \
 	shared_ptr.cc \
 	system_error.cc \
@@ -404,6 +405,7 @@ Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
 	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe)'; \
 	    cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe);; \
 	esac;
+$(top_srcdir)/fragment.am:
 
 $(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
 	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
@@ -422,7 +424,7 @@ clean-noinstLTLIBRARIES:
 	  echo "rm -f \"$${dir}/so_locations\""; \
 	  rm -f "$${dir}/so_locations"; \
 	done
-libc++11convenience.la: $(libc__11convenience_la_OBJECTS) $(libc__11convenience_la_DEPENDENCIES) 
+libc++11convenience.la: $(libc__11convenience_la_OBJECTS) $(libc__11convenience_la_DEPENDENCIES) $(EXTRA_libc__11convenience_la_DEPENDENCIES) 
 	$(CXXLINK)  $(libc__11convenience_la_OBJECTS) $(libc__11convenience_la_LIBADD) $(LIBS)
 
 mostlyclean-compile:
@@ -511,10 +513,15 @@ install-am: all-am
 
 installcheck: installcheck-am
 install-strip:
+	if test -z '$(STRIP)'; then \
 	$(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
 	  install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
-	  `test -z '$(STRIP)' || \
-	    echo "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'"` install
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
 mostlyclean-generic:
 
 clean-generic:
diff --git a/libstdc++-v3/src/c++11/random.cc b/libstdc++-v3/src/c++11/random.cc
new file mode 100644
index 00000000000..cabc388760b
--- /dev/null
+++ b/libstdc++-v3/src/c++11/random.cc
@@ -0,0 +1,147 @@
+// random -*- C++ -*-
+
+// Copyright (C) 2012 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+#include <random>
+
+#if defined __i386__ || defined __x86_64__
+# include <cpuid.h>
+#endif
+
+
+namespace std _GLIBCXX_VISIBILITY(default)
+{
+
+  namespace
+  {
+    static unsigned long
+    _M_strtoul(const std::string& __str)
+    {
+      unsigned long __ret = 5489UL;
+      if (__str != "mt19937")
+	{
+	  const char* __nptr = __str.c_str();
+	  char* __endptr;
+	  __ret = std::strtoul(__nptr, &__endptr, 0);
+	  if (*__nptr == '\0' || *__endptr != '\0')
+	    std::__throw_runtime_error(__N("random_device::_M_strtoul"
+					   "(const std::string&)"));
+	}
+      return __ret;
+    }
+
+#if defined __i386__ || defined __x86_64__
+    unsigned int
+    __attribute__ ((target("rdrnd")))
+    __x86_rdrand(void)
+    {
+      unsigned int retries = 100;
+      unsigned int val;
+
+      while (__builtin_ia32_rdrand32_step(&val) == 0)
+	if (--retries == 0)
+	  std::__throw_runtime_error(__N("random_device::__x86_rdrand(void)"));
+
+      return val;
+    }
+#endif
+  }
+
+
+  void
+  random_device::_M_init(const std::string& token)
+  {
+    const char *fname = token.c_str();
+
+    if (token == "default")
+      {
+#if defined __i386__ || defined __x86_64__
+	unsigned int eax, ebx, ecx, edx;
+	__cpuid(0, eax, ebx, ecx, edx);
+	// Check for "GenuineIntel"
+	if (ebx == 0x756e6547 && ecx == 0x6c65746e && edx == 0x49656e69)
+	  {
+	    __cpuid(1, eax, ebx, ecx, edx);
+	    if (ecx & bit_RDRND)
+	      {
+		_M_file = nullptr;
+		return;
+	      }
+	  }
+#endif
+
+	fname = "/dev/urandom";
+      }
+    else if (token != "/dev/urandom" && token != "/dev/random")
+    fail:
+      std::__throw_runtime_error(__N("random_device::"
+				     "random_device(const std::string&)"));
+
+    _M_file = std::fopen(fname, "rb");
+    if (! _M_file)
+      goto fail;
+  }
+
+  void
+  random_device::_M_init_pretr1(const std::string& token)
+
+  {
+    _M_mt.seed(_M_strtoul(token));
+  }
+
+  void
+  random_device::_M_fini()
+  {
+    if (_M_file)
+      std::fclose(_M_file);
+  }
+
+  random_device::result_type
+  random_device::_M_getval()
+  {
+#if (defined __i386__ || defined __x86_64__)
+    if (! _M_file)
+      return __x86_rdrand();
+#endif
+
+    result_type __ret;
+    std::fread(reinterpret_cast<void*>(&__ret), sizeof(result_type),
+	       1, _M_file);
+    return __ret;
+  }
+
+  random_device::result_type
+  random_device::_M_getval_pretr1()
+  {
+    return _M_mt();
+  }
+
+  template class mersenne_twister_engine<
+    uint_fast32_t,
+    32, 624, 397, 31,
+    0x9908b0dfUL, 11,
+    0xffffffffUL, 7,
+    0x9d2c5680UL, 15,
+    0xefc60000UL, 18, 1812433253UL>;
+
+}