[svn-r12739] Added Direct I/O driver to VFD. It's only supported by SGI Altix (cobalt). There's a configure

option --enable-direct-vfd/--disable-direct-vfd to enable/disable Direct I/O support.  The default
is enabled.  There's a small test in test/vfd.c.  Another way to test it is to set environment
variable HDF5_DRIVER to "direct" and run "make check" in the test/ directory.  There'll be some
further improvement in the following checkin including allowing user to provide memory boundary
value, file block size, and copying buffer size.

1 files changed, 119 insertions, 32 deletions

diff --git a/configure b/configure
index cbec5b3..32f2bad 100755
--- a/configure
+++ b/configure
@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.in Id: configure.in 12700 2006-10-02 10:24:03Z koziol .
+# From configure.in Id: configure.in 12715 2006-10-03 22:41:34Z jlaird .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.59 for HDF5 1.8.0-alpha6.
 #
@@ -1082,6 +1082,8 @@ Optional Features:
                           specify a comma-separated list of filters or the
                           word no. The default is all internal I/O filters.
   --enable-stream-vfd     Build the Stream Virtual File Driver [default=yes]
+  --enable-direct-vfd     Build the Direct I/O Virtual File Driver
+                          [default=yes]
   --enable-dconv-exception
                           if exception handling functions is checked during
                           data conversions [default=yes]
@@ -3519,7 +3521,7 @@ fi
 
 
 # Provide some information about the compiler.
-echo "$as_me:3522:" \
+echo "$as_me:3524:" \
      "checking for Fortran compiler version" >&5
 ac_compiler=`set X $ac_compile; echo $2`
 { (eval echo "$as_me:$LINENO: \"$ac_compiler --version </dev/null >&5\"") >&5
@@ -3814,7 +3816,7 @@ _ACEOF
 # flags.
 ac_save_FFLAGS=$FCFLAGS
 FCFLAGS="$FCFLAGS $ac_verb"
-(eval echo $as_me:3817: \"$ac_link\") >&5
+(eval echo $as_me:3819: \"$ac_link\") >&5
 ac_fc_v_output=`eval $ac_link 5>&1 2>&1 | grep -v 'Driving:'`
 echo "$ac_fc_v_output" >&5
 FCFLAGS=$ac_save_FFLAGS
@@ -3892,7 +3894,7 @@ _ACEOF
 # flags.
 ac_save_FFLAGS=$FCFLAGS
 FCFLAGS="$FCFLAGS $ac_cv_prog_fc_v"
-(eval echo $as_me:3895: \"$ac_link\") >&5
+(eval echo $as_me:3897: \"$ac_link\") >&5
 ac_fc_v_output=`eval $ac_link 5>&1 2>&1 | grep -v 'Driving:'`
 echo "$ac_fc_v_output" >&5
 FCFLAGS=$ac_save_FFLAGS
@@ -6665,7 +6667,7 @@ ia64-*-hpux*)
   ;;
 *-*-irix6*)
   # Find out which ABI we are using.
-  echo '#line 6668 "configure"' > conftest.$ac_ext
+  echo '#line 6670 "configure"' > conftest.$ac_ext
   if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
@@ -7795,7 +7797,7 @@ fi
 
 
 # Provide some information about the compiler.
-echo "$as_me:7798:" \
+echo "$as_me:7800:" \
      "checking for Fortran 77 compiler version" >&5
 ac_compiler=`set X $ac_compile; echo $2`
 { (eval echo "$as_me:$LINENO: \"$ac_compiler --version </dev/null >&5\"") >&5
@@ -8864,11 +8866,11 @@ else
    -e 's:.*FLAGS}? :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:8867: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:8869: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:8871: \$? = $ac_status" >&5
+   echo "$as_me:8873: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings
@@ -9119,11 +9121,11 @@ else
    -e 's:.*FLAGS}? :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:9122: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:9124: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:9126: \$? = $ac_status" >&5
+   echo "$as_me:9128: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings
@@ -9179,11 +9181,11 @@ else
    -e 's:.*FLAGS}? :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:9182: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:9184: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:9186: \$? = $ac_status" >&5
+   echo "$as_me:9188: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -11451,7 +11453,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 11454 "configure"
+#line 11456 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11549,7 +11551,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 11552 "configure"
+#line 11554 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -13785,11 +13787,11 @@ else
    -e 's:.*FLAGS}? :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:13788: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:13790: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:13792: \$? = $ac_status" >&5
+   echo "$as_me:13794: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings
@@ -13845,11 +13847,11 @@ else
    -e 's:.*FLAGS}? :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:13848: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:13850: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:13852: \$? = $ac_status" >&5
+   echo "$as_me:13854: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -15264,7 +15266,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 15267 "configure"
+#line 15269 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -15362,7 +15364,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 15365 "configure"
+#line 15367 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -16217,11 +16219,11 @@ else
    -e 's:.*FLAGS}? :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:16220: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:16222: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:16224: \$? = $ac_status" >&5
+   echo "$as_me:16226: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings
@@ -16277,11 +16279,11 @@ else
    -e 's:.*FLAGS}? :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:16280: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:16282: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:16284: \$? = $ac_status" >&5
+   echo "$as_me:16286: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -18333,11 +18335,11 @@ else
    -e 's:.*FLAGS}? :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:18336: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:18338: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:18340: \$? = $ac_status" >&5
+   echo "$as_me:18342: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings
@@ -18588,11 +18590,11 @@ else
    -e 's:.*FLAGS}? :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:18591: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:18593: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:18595: \$? = $ac_status" >&5
+   echo "$as_me:18597: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings
@@ -18648,11 +18650,11 @@ else
    -e 's:.*FLAGS}? :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:18651: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:18653: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:18655: \$? = $ac_status" >&5
+   echo "$as_me:18657: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -20920,7 +20922,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 20923 "configure"
+#line 20925 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -21018,7 +21020,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 21021 "configure"
+#line 21023 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -50972,6 +50974,91 @@ fi
 rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
 fi
 
+
+echo "$as_me:$LINENO: checking for Direct Virtual File Driver support" >&5
+echo $ECHO_N "checking for Direct Virtual File Driver support... $ECHO_C" >&6
+
+# Check whether --enable-direct-vfd or --disable-direct-vfd was given.
+if test "${enable_direct_vfd+set}" = set; then
+  enableval="$enable_direct_vfd"
+  DIRECT_VFD=$enableval
+else
+  DIRECT_VFD=yes
+fi;
+
+if test "$DIRECT_VFD" = "yes"; then
+   if test "${hdf5_direct_io+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  if test "$cross_compiling" = yes; then
+  { { echo "$as_me:$LINENO: error: cannot run test program while cross compiling
+See \`config.log' for more details." >&5
+echo "$as_me: error: cannot run test program while cross compiling
+See \`config.log' for more details." >&2;}
+   { (exit 1); exit 1; }; }
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+	  #include <sys/types.h>
+	  #include <sys/stat.h>
+	  #include <fcntl.h>
+          int main(void)
+          {
+             int fid;
+             if((fid=open("tst_file", O_CREAT | O_TRUNC | O_DIRECT, 0755))<0)
+		exit(1);
+             close(fid);
+             remove("tst_file");
+             exit (0);
+          }
+_ACEOF
+rm -f conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && { ac_try='./conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  hdf5_direct_io=yes
+else
+  echo "$as_me: program exited with status $ac_status" >&5
+echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+( exit $ac_status )
+hdf5_direct_io=no
+fi
+rm -f core *.core gmon.out bb.out conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext
+fi
+fi
+
+
+   if test ${hdf5_direct_io} = "yes"; then
+      echo "$as_me:$LINENO: result: yes" >&5
+echo "${ECHO_T}yes" >&6
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_DIRECT 1
+_ACEOF
+
+   else
+      echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+   fi
+else
+      echo "$as_me:$LINENO: result: suppressed" >&5
+echo "${ECHO_T}suppressed" >&6
+fi
+
 echo "$as_me:$LINENO: checking whether exception handling functions is checked during data conversions" >&5
 echo $ECHO_N "checking whether exception handling functions is checked during data conversions... $ECHO_C" >&6
 # Check whether --enable-dconv-exception or --disable-dconv-exception was given.