acinclude.m4 (GLIBCXX_CHECK_SC_NPROC_ONLN): Define.

	* acinclude.m4 (GLIBCXX_CHECK_SC_NPROC_ONLN): Define.
	(GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP): Define.
	(GLIBCXX_CHECK_SYSCTL_HW_NCPU): Define.
	* configure.ac: Use new checks.
	* configure: Regenerate.
	* config.h.in: Regenerate.
	* src/thread.cc: Check new config macros.
	* testsuite/lib/libstdc++.exp: Likewise.

From-SVN: r181084

7 files changed, 384 insertions, 6 deletions

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index f619177..2e5ccf0 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,5 +1,16 @@
 2011-11-07  Jonathan Wakely  <jwakely.gcc@gmail.com>
 
+	* acinclude.m4 (GLIBCXX_CHECK_SC_NPROC_ONLN): Define.
+	(GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP): Define.
+	(GLIBCXX_CHECK_SYSCTL_HW_NCPU): Define.
+	* configure.ac: Use new checks.
+	* configure: Regenerate.
+	* config.h.in: Regenerate.
+	* src/thread.cc: Check new config macros.
+	* testsuite/lib/libstdc++.exp: Likewise.
+
+2011-11-07  Jonathan Wakely  <jwakely.gcc@gmail.com>
+
 	* config/abi/pre/gnu.ver: Fix exports for string::pop_back.
 
 2011-11-07  Jonathan Wakely  <jwakely.gcc@gmail.com>
diff --git a/libstdc++-v3/acinclude.m4 b/libstdc++-v3/acinclude.m4
index 3464b76..6cc6ace 100644
--- a/libstdc++-v3/acinclude.m4
+++ b/libstdc++-v3/acinclude.m4
@@ -3459,6 +3459,94 @@ AC_DEFUN([GLIBCXX_CHECK_SC_NPROCESSORS_ONLN], [
   AC_LANG_RESTORE
 ])
 
+dnl
+dnl Check whether sysconf(_SC_NPROC_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROC_ONLN.
+dnl
+AC_DEFUN([GLIBCXX_CHECK_SC_NPROC_ONLN], [
+
+  AC_LANG_SAVE
+  AC_LANG_CPLUSPLUS
+  ac_save_CXXFLAGS="$CXXFLAGS"
+  CXXFLAGS="$CXXFLAGS -fno-exceptions"
+
+  AC_MSG_CHECKING([for _SC_NPROC_ONLN])
+  AC_CACHE_VAL(glibcxx_cv_SC_NPROC_ONLN, [
+    GCC_TRY_COMPILE_OR_LINK(
+      [#include <unistd.h>],
+      [int n = sysconf(_SC_NPROC_ONLN);],
+      [glibcxx_cv_SC_NPROC_ONLN=yes],
+      [glibcxx_cv_SC_NPROC_ONLN=no])
+  ])
+  if test $glibcxx_cv_SC_NPROC_ONLN = yes; then
+    AC_DEFINE(_GLIBCXX_USE_SC_NPROC_ONLN, 1, [Define if _SC_NPROC_ONLN  is available in <unistd.h>.])
+  fi
+  AC_MSG_RESULT($glibcxx_cv_SC_NPROC_ONLN)
+
+  CXXFLAGS="$ac_save_CXXFLAGS"
+  AC_LANG_RESTORE
+])
+
+dnl
+dnl Check whether pthread_num_processors_np is available in <pthread.h>, and define _GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP.
+dnl
+AC_DEFUN([GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP], [
+
+  AC_LANG_SAVE
+  AC_LANG_CPLUSPLUS
+  ac_save_CXXFLAGS="$CXXFLAGS"
+  CXXFLAGS="$CXXFLAGS -fno-exceptions"
+
+  AC_MSG_CHECKING([for pthreads_num_processors_np])
+  AC_CACHE_VAL(glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP, [
+    GCC_TRY_COMPILE_OR_LINK(
+      [#include <pthread.h>],
+      [int n = pthread_num_processors_np();],
+      [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=yes],
+      [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=no])
+  ])
+  if test $glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP = yes; then
+    AC_DEFINE(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP, 1, [Define if pthreads_num_processors_np is available in <pthread.h>.])
+  fi
+  AC_MSG_RESULT($glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP)
+
+  CXXFLAGS="$ac_save_CXXFLAGS"
+  AC_LANG_RESTORE
+])
+
+dnl
+dnl Check whether sysctl is available in <pthread.h>, and define _GLIBCXX_USE_SYSCTL_HW_NCPU.
+dnl
+AC_DEFUN([GLIBCXX_CHECK_SYSCTL_HW_NCPU], [
+
+  AC_LANG_SAVE
+  AC_LANG_CPLUSPLUS
+  ac_save_CXXFLAGS="$CXXFLAGS"
+  CXXFLAGS="$CXXFLAGS -fno-exceptions"
+
+  AC_MSG_CHECKING([for hw.ncpu sysctl])
+  AC_CACHE_VAL(glibcxx_cv_SYSCTL_HW_NCPU, [
+    GCC_TRY_COMPILE_OR_LINK(
+      [
+       #include <stddef.h>
+       #include <sys/sysctl.h>
+       ],
+      [
+       int count;
+       size_t size = sizeof(count);
+       int mib[] = { CTL_HW, HW_NCPU };
+       sysctl(mib, 2, &count, &size, NULL, 0);
+      ],
+      [glibcxx_cv_SYSCTL_HW_NCPU=yes],
+      [glibcxx_cv_SYSCTL_HW_NCPU=no])
+  ])
+  if test $glibcxx_cv_SYSCTL_HW_NCPU = yes; then
+    AC_DEFINE(_GLIBCXX_USE_SYSCTL_HW_NCPU, 1, [Define if sysctl(), CTL_HW and HW_NCPU are available in <sys/sysctl.h>.])
+  fi
+  AC_MSG_RESULT($glibcxx_cv_SYSCTL_HW_NCPU)
+
+  CXXFLAGS="$ac_save_CXXFLAGS"
+  AC_LANG_RESTORE
+])
 
 # Macros from the top-level gcc directory.
 m4_include([../config/gc++filt.m4])
diff --git a/libstdc++-v3/config.h.in b/libstdc++-v3/config.h.in
index 82ccd4e..7215a7f 100644
--- a/libstdc++-v3/config.h.in
+++ b/libstdc++-v3/config.h.in
@@ -831,6 +831,9 @@
 /* Define if NLS translations are to be used. */
 #undef _GLIBCXX_USE_NLS
 
+/* Define if pthreads_num_processors_np is available in <pthread.h>. */
+#undef _GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP
+
 /* Define if /dev/random and /dev/urandom are available for the random_device
    of TR1 (Chapter 5.1). */
 #undef _GLIBCXX_USE_RANDOM_TR1
@@ -841,6 +844,12 @@
 /* Define if _SC_NPROCESSORS_ONLN is available in <unistd.h>. */
 #undef _GLIBCXX_USE_SC_NPROCESSORS_ONLN
 
+/* Define if _SC_NPROC_ONLN is available in <unistd.h>. */
+#undef _GLIBCXX_USE_SC_NPROC_ONLN
+
+/* Define if sysctl(), CTL_HW and HW_NCPU are available in <sys/sysctl.h>. */
+#undef _GLIBCXX_USE_SYSCTL_HW_NCPU
+
 /* Define if code specialized for wchar_t should be used. */
 #undef _GLIBCXX_USE_WCHAR_T
 
diff --git a/libstdc++-v3/configure b/libstdc++-v3/configure
index 94b29a0..3be252e 100755
--- a/libstdc++-v3/configure
+++ b/libstdc++-v3/configure
@@ -20132,6 +20132,256 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 
 
+
+
+  ac_ext=cpp
+ac_cpp='$CXXCPP $CPPFLAGS'
+ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
+
+  ac_save_CXXFLAGS="$CXXFLAGS"
+  CXXFLAGS="$CXXFLAGS -fno-exceptions"
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for _SC_NPROC_ONLN" >&5
+$as_echo_n "checking for _SC_NPROC_ONLN... " >&6; }
+  if test "${glibcxx_cv_SC_NPROC_ONLN+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+
+    if test x$gcc_no_link = xyes; then
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <unistd.h>
+int
+main ()
+{
+int n = sysconf(_SC_NPROC_ONLN);
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_cxx_try_compile "$LINENO"; then :
+  glibcxx_cv_SC_NPROC_ONLN=yes
+else
+  glibcxx_cv_SC_NPROC_ONLN=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+else
+  if test x$gcc_no_link = xyes; then
+  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+fi
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <unistd.h>
+int
+main ()
+{
+int n = sysconf(_SC_NPROC_ONLN);
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_cxx_try_link "$LINENO"; then :
+  glibcxx_cv_SC_NPROC_ONLN=yes
+else
+  glibcxx_cv_SC_NPROC_ONLN=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+fi
+
+fi
+
+  if test $glibcxx_cv_SC_NPROC_ONLN = yes; then
+
+$as_echo "#define _GLIBCXX_USE_SC_NPROC_ONLN 1" >>confdefs.h
+
+  fi
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_SC_NPROC_ONLN" >&5
+$as_echo "$glibcxx_cv_SC_NPROC_ONLN" >&6; }
+
+  CXXFLAGS="$ac_save_CXXFLAGS"
+  ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+
+
+
+  ac_ext=cpp
+ac_cpp='$CXXCPP $CPPFLAGS'
+ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
+
+  ac_save_CXXFLAGS="$CXXFLAGS"
+  CXXFLAGS="$CXXFLAGS -fno-exceptions"
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for pthreads_num_processors_np" >&5
+$as_echo_n "checking for pthreads_num_processors_np... " >&6; }
+  if test "${glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+
+    if test x$gcc_no_link = xyes; then
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <pthread.h>
+int
+main ()
+{
+int n = pthread_num_processors_np();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_cxx_try_compile "$LINENO"; then :
+  glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=yes
+else
+  glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+else
+  if test x$gcc_no_link = xyes; then
+  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+fi
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <pthread.h>
+int
+main ()
+{
+int n = pthread_num_processors_np();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_cxx_try_link "$LINENO"; then :
+  glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=yes
+else
+  glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+fi
+
+fi
+
+  if test $glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP = yes; then
+
+$as_echo "#define _GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP 1" >>confdefs.h
+
+  fi
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP" >&5
+$as_echo "$glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP" >&6; }
+
+  CXXFLAGS="$ac_save_CXXFLAGS"
+  ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+
+
+
+  ac_ext=cpp
+ac_cpp='$CXXCPP $CPPFLAGS'
+ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
+
+  ac_save_CXXFLAGS="$CXXFLAGS"
+  CXXFLAGS="$CXXFLAGS -fno-exceptions"
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for hw.ncpu sysctl" >&5
+$as_echo_n "checking for hw.ncpu sysctl... " >&6; }
+  if test "${glibcxx_cv_SYSCTL_HW_NCPU+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+
+    if test x$gcc_no_link = xyes; then
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+       #include <stddef.h>
+       #include <sys/sysctl.h>
+
+int
+main ()
+{
+
+       int count;
+       size_t size = sizeof(count);
+       int mib[] = { CTL_HW, HW_NCPU };
+       sysctl(mib, 2, &count, &size, NULL, 0);
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_cxx_try_compile "$LINENO"; then :
+  glibcxx_cv_SYSCTL_HW_NCPU=yes
+else
+  glibcxx_cv_SYSCTL_HW_NCPU=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+else
+  if test x$gcc_no_link = xyes; then
+  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+fi
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+       #include <stddef.h>
+       #include <sys/sysctl.h>
+
+int
+main ()
+{
+
+       int count;
+       size_t size = sizeof(count);
+       int mib[] = { CTL_HW, HW_NCPU };
+       sysctl(mib, 2, &count, &size, NULL, 0);
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_cxx_try_link "$LINENO"; then :
+  glibcxx_cv_SYSCTL_HW_NCPU=yes
+else
+  glibcxx_cv_SYSCTL_HW_NCPU=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+fi
+
+fi
+
+  if test $glibcxx_cv_SYSCTL_HW_NCPU = yes; then
+
+$as_echo "#define _GLIBCXX_USE_SYSCTL_HW_NCPU 1" >>confdefs.h
+
+  fi
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_SYSCTL_HW_NCPU" >&5
+$as_echo "$glibcxx_cv_SYSCTL_HW_NCPU" >&6; }
+
+  CXXFLAGS="$ac_save_CXXFLAGS"
+  ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+
 # Check for available headers.
 for ac_header in endian.h execinfo.h float.h fp.h ieeefp.h inttypes.h \
 locale.h machine/endian.h machine/param.h nan.h stdint.h stdlib.h string.h \
diff --git a/libstdc++-v3/configure.ac b/libstdc++-v3/configure.ac
index eb2fe85..8f85307 100644
--- a/libstdc++-v3/configure.ac
+++ b/libstdc++-v3/configure.ac
@@ -174,6 +174,9 @@ AC_CHECK_HEADERS(sys/sysinfo.h)
 GLIBCXX_CHECK_GET_NPROCS
 AC_CHECK_HEADERS(unistd.h)
 GLIBCXX_CHECK_SC_NPROCESSORS_ONLN
+GLIBCXX_CHECK_SC_NPROC_ONLN
+GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP
+GLIBCXX_CHECK_SYSCTL_HW_NCPU
 
 # Check for available headers.
 AC_CHECK_HEADERS([endian.h execinfo.h float.h fp.h ieeefp.h inttypes.h \
diff --git a/libstdc++-v3/src/thread.cc b/libstdc++-v3/src/thread.cc
index 09e7fc5..ff034b1 100644
--- a/libstdc++-v3/src/thread.cc
+++ b/libstdc++-v3/src/thread.cc
@@ -30,9 +30,27 @@
 #if defined(_GLIBCXX_USE_GET_NPROCS)
 # include <sys/sysinfo.h>
 # define _GLIBCXX_NPROCS get_nprocs()
+#elif defined(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP)
+# define _GLIBCXX_NPROCS pthread_num_processors_np()
+#elif defined(_GLIBCXX_USE_SYSCTL_HW_NCPU)
+# include <stddef.h>
+# include <sys/sysctl.h>
+static inline int get_nprocs()
+{
+ int count;
+ size_t size = sizeof(count);
+ int mib[] = { CTL_HW, HW_NCPU };
+ if (!sysctl(mib, 2, &count, &size, NULL, 0))
+   return count;
+ return 0;
+}
+# define _GLIBCXX_NPROCS get_nprocs()
 #elif defined(_GLIBCXX_USE_SC_NPROCESSORS_ONLN)
 # include <unistd.h>
 # define _GLIBCXX_NPROCS sysconf(_SC_NPROCESSORS_ONLN)
+#elif defined(_GLIBCXX_USE_SC_NPROC_ONLN)
+# include <unistd.h>
+# define _GLIBCXX_NPROCS sysconf(_SC_NPROC_ONLN)
 #else
 # define _GLIBCXX_NPROCS 0
 #endif
diff --git a/libstdc++-v3/testsuite/lib/libstdc++.exp b/libstdc++-v3/testsuite/lib/libstdc++.exp
index b510c06..e419192 100644
--- a/libstdc++-v3/testsuite/lib/libstdc++.exp
+++ b/libstdc++-v3/testsuite/lib/libstdc++.exp
@@ -1673,13 +1673,12 @@ proc check_v3_target_nprocs { } {
 	set f [open $src "w"]
         puts $f "#include <bits/c++config.h>"
 	puts $f "#if defined(_GLIBCXX_USE_GET_NPROCS)"
-	puts $f "#elif defined(_GLIBCXX_USE_SYSCONF)"
-        puts $f "# include <unistd.h>"
-	puts $f "# if !defined(_SC_NPROCESSORS_ONLN)"
-	puts $f "#  error No sysconf option"
-	puts $f "# endif"
+	puts $f "#elif defined(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP)"
+	puts $f "#elif defined(_GLIBCXX_USE_SYSCTL_HW_NCPU)"
+	puts $f "#elif defined(_GLIBCXX_USE_SC_NPROCESSORS_ONLN)"
+	puts $f "#elif defined(_GLIBCXX_USE_SC_NPROC_ONLN)"
 	puts $f "#else"
-	puts $f "#  error No get_nprocs or sysconf"
+	puts $f "#  error hardware_concurrency not implemented"
 	puts $f "#endif"
 	close $f