Hi,
I used DL to call intel fortran .dylib file successfully before, but DL is
removed from
latest Ruby version. I tried to use fiddle and got error message "unknown
symbol
'samplesize'", could anyone help to see where I did wrong? Thanks!
Liz
my fortran function is below (our_int is compatible with long in C,
our_double is compatible with
double in C):
integer(our_int) function samplesize( maxn, delta, conf, errmsg ) result(
answer )
!DEC$ ATTRIBUTES DLLEXPORT :: samplesize
!
! OUTPUT
! N: sample size
!
! EXAMPLE
! samplesize4(3000, .2, .90);
!
implicit none
integer(our_int), intent(in) :: maxn
real(our_dble), intent(in) :: delta, conf
character(len=err_msg_width), intent(out) :: errmsg
....
and I used DL to call it like this before:
require 'dl'
require 'pathname'
sspath = Pathname.new( "#{RAILS_ROOT}/lib/libsamplesize.dylib" )
ss = DL.dlopen( sspath )
samplesize = ss[ "samplesize_", "iiddS" ]
session[:errmsg] =
"
";
session[:n], args = samplesize[ session[:nmax], session[:delta],
session[:conf], session[:errmsg] ]
Now I tried to use fiddle as below:
require 'fiddle'
libm = Fiddle.dlopen(
"/Library/WebServer/smart/lib/libsamplesize.dylib" )
# samplesize = ss[ "samplesize_", "iiddS" ]
samplesize=Fiddle::Function.new(libm['samplesize'],[Fiddle::TYPE_LONG,Fiddle::TYPE_DOUBLE,Fiddle::TYPE_DOUBLE,Fiddle::TYPE_VOIDP],Fiddle::TYPE_LONG)
session[:errmsg] =
"
";
# session[:n], args = samplesize[ session[:nmax], session[:sigma_sq],
# session[:delta], session[:conf],
session[:errmsg] ]
session[:n] = samplesize.call( session[:nmax], session[:delta],
session[:conf], session[:errmsg] )
but I got error:
unknown symbol "samplesize"
Extracted source (around line *#34*):
323334353637
libm = Fiddle.dlopen( "/Library/WebServer/smart/lib/libsamplesize.dylib"
)
# samplesize = ss[ "samplesize_", "iiddS" ]
samplesize=Fiddle::Function.new(libm['samplesize'],[Fiddle::TYPE_LONG,Fiddle::TYPE_DOUBLE,Fiddle::TYPE_DOUBLE,Fiddle::TYPE_VOIDP],Fiddle::TYPE_LONG)
session[:errmsg] = "
";
# session[:n], args = samplesize[ session[:nmax], session[:sigma_sq],
# session[:delta], session[:conf], session[:errmsg] ]
Rails.root: /Library/WebServer/smart
Application Trace <http://calder229.hhdev.psu.edu/smart/samplesize/compute#>
| Framework Trace <http://calder229.hhdev.psu.edu/smart/samplesize/compute#>
| Full Trace <http://calder229.hhdev.psu.edu/smart/samplesize/compute#>
app/controllers/samplesize_controller.rb:34:in `[]'
app/controllers/samplesize_controller.rb:34:in `compute'
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