From 2ea759e2faab0331078b1ea0df244ef781dbd994 Mon Sep 17 00:00:00 2001
From: Bruno Haible <bruno@clisp.org>
Date: Sun, 18 Oct 2009 10:42:19 +0200
Subject: [PATCH] Implement nproc for HP-UX.

---
 ChangeLog   |  8 ++++++++
 lib/nproc.c | 13 +++++++++++++
 m4/nproc.m4 |  6 +++---
 3 files changed, 24 insertions(+), 3 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 240ef97ae..c715d0a41 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2009-10-18  Bruno Haible  <bruno@clisp.org>
+
+	Implement nproc for HP-UX.
+	* lib/nproc.c: Include <sys/pstat.h>
+	(num_processors): On HP-UX systems, try pstat_getdynamic.
+	* m4/nproc.m4 (gl_PREREQ_NPROC): Check for sys/pstat.h and
+	pstat_getdynamic.
+
 2009-10-18  Giuseppe Scrivano  <gscrivano@gnu.org>
             Bruno Haible  <bruno@clisp.org>
 
diff --git a/lib/nproc.c b/lib/nproc.c
index a1a7c41df..48c0d8aff 100644
--- a/lib/nproc.c
+++ b/lib/nproc.c
@@ -25,6 +25,10 @@
 
 #include <sys/types.h>
 
+#if HAVE_SYS_PSTAT_H
+# include <sys/pstat.h>
+#endif
+
 #if HAVE_SYS_PARAM_H
 # include <sys/param.h>
 #endif
@@ -49,6 +53,15 @@ num_processors (void)
   }
 #endif
 
+#if HAVE_PSTAT_GETDYNAMIC
+  { /* This works on HP-UX.  */
+    struct pst_dynamic psd;
+    if (0 <= pstat_getdynamic (&psd, sizeof psd, 1, 0)
+	&& 0 < psd.psd_proc_cnt)
+      return psd.psd_proc_cnt;
+  }
+#endif
+
 #if HAVE_SYSCTL && defined HW_NCPU
   { /* This works on MacOS X, FreeBSD, NetBSD, OpenBSD.  */
     int nprocs;
diff --git a/m4/nproc.m4 b/m4/nproc.m4
index 73b812dd2..5bcae8028 100644
--- a/m4/nproc.m4
+++ b/m4/nproc.m4
@@ -1,4 +1,4 @@
-# nproc.m4 serial 1
+# nproc.m4 serial 2
 dnl Copyright (C) 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -12,7 +12,7 @@ AC_DEFUN([gl_NPROC],
 # Prerequisites of lib/nproc.c.
 AC_DEFUN([gl_PREREQ_NPROC],
 [
-  AC_CHECK_HEADERS([sys/param.h],,, [AC_INCLUDES_DEFAULT])
+  AC_CHECK_HEADERS([sys/pstat.h sys/param.h],,, [AC_INCLUDES_DEFAULT])
   dnl <sys/sysctl.h> requires <sys/param.h> on OpenBSD 4.0.
   AC_CHECK_HEADERS([sys/sysctl.h],,,
     [AC_INCLUDES_DEFAULT
@@ -20,5 +20,5 @@ AC_DEFUN([gl_PREREQ_NPROC],
      # include <sys/param.h>
      #endif
     ])
-  AC_CHECK_FUNCS([sysctl])
+  AC_CHECK_FUNCS([pstat_getdynamic sysctl])
 ])
-- 
2.11.0