Top Level Namespace

Defined Under Namespace

Modules: DL

Constant Summary collapse

CDECL =
"cdecl"
STDCALL =
"stdcall"
CALLTYPES =
[CDECL, STDCALL]
DLTYPE =
{
  VOID => {
    :name => 'void',
    :type => 'void',
    :conv => nil,
  },
  CHAR => {
    :name => 'char',
    :type => 'char',
    :conv => 'NUM2CHR(%s)'
  },
  SHORT => {
    :name => 'short',
    :type => 'short',
    :conv => 'NUM2INT(%s)',
  },
  INT => {
    :name => 'int',
    :type => 'int',
    :conv => 'NUM2INT(%s)',
  },
  LONG  => {
    :name => 'long',
    :type => 'long',
    :conv => 'NUM2LONG(%s)',
  },
  LONG_LONG => {
    :name => 'long_long',
    :type => 'LONG_LONG',
    :conv => 'NUM2LL(%s)',
  },
  FLOAT => {
    :name => 'float',
    :type => 'float',
    :conv => '(float)RFLOAT_VALUE(%s)',
  },
  DOUBLE => {
    :name => 'double',
    :type => 'double',
    :conv => 'RFLOAT_VALUE(%s)',
  },
  VOIDP => {
    :name => 'ptr',
    :type => 'void *',
    :conv => 'NUM2PTR(%s)',
  },
}

Instance Method Summary collapse

Instance Method Details

#foreach_proc_entryObject


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# File 'callback/mkcallback.rb', line 109

def foreach_proc_entry
  for calltype in CALLTYPES
    case calltype
    when CDECL
      proc_entry = "rb_DLCdeclCallbackProcs"
    when STDCALL
      proc_entry = "rb_DLStdcallCallbackProcs"
    else
      raise "unknown calltype: #{calltype}"
    end
    yield calltype, proc_entry
  end
end

#func_name(ty, argc, n, calltype) ⇒ Object


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# File 'callback/mkcallback.rb', line 91

def func_name(ty, argc, n, calltype)
  "rb_dl_callback_#{DLTYPE[ty][:name]}_#{argc}_#{n}_#{calltype}"
end

#gen_callback_file(ty) {|body| ... } ⇒ Object

Yields:

  • (body)

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# File 'callback/mkcallback.rb', line 165

def gen_callback_file(ty)
  filename = "#{$output}-#{ty}.c"
  initname = "rb_dl_init_callbacks_#{ty}"
  body = <<-EOS
#include "dl.h"

extern VALUE rb_DLCdeclCallbackAddrs, rb_DLCdeclCallbackProcs;
#ifdef FUNC_STDCALL
extern VALUE rb_DLStdcallCallbackAddrs, rb_DLStdcallCallbackProcs;
#endif
extern ID   rb_dl_cb_call;
    EOS
  yield body
  body << <<-EOS
void
#{initname}()
{
#{gen_push_proc_ary(ty, "rb_DLCdeclCallbackProcs")}
#{gen_push_addr_ary(ty, "rb_DLCdeclCallbackAddrs", CDECL)}
#ifdef FUNC_STDCALL
#{gen_push_proc_ary(ty, "rb_DLStdcallCallbackProcs")}
#{gen_push_addr_ary(ty, "rb_DLStdcallCallbackAddrs", STDCALL)}
#endif
}
    EOS
  [filename, initname, body]
end

#gen_push_addr_ary(ty, aryname, calltype) ⇒ Object


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# File 'callback/mkcallback.rb', line 155

def gen_push_addr_ary(ty, aryname, calltype)
  sprintf("    rb_ary_push(#{aryname}, rb_ary_new3(%d,%s));",
          MAX_CALLBACK * DLSTACK_SIZE,
          (0...MAX_CALLBACK).collect{|i|
            (0...DLSTACK_SIZE).collect{|argc|
              "PTR2NUM(%s)" % func_name(ty,argc,i,calltype)
            }.join(",")
          }.join(","))
end

#gen_push_proc_ary(ty, aryname) ⇒ Object


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# File 'callback/mkcallback.rb', line 147

def gen_push_proc_ary(ty, aryname)
  sprintf("    rb_ary_push(#{aryname}, rb_ary_new3(%d,%s));",
          MAX_CALLBACK * DLSTACK_SIZE,
          (0...MAX_CALLBACK).collect{
            (0...DLSTACK_SIZE).collect{ "Qnil" }.join(",")
          }.join(","))
end

#gencallback(ty, calltype, proc_entry, argc, n) ⇒ Object


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# File 'callback/mkcallback.rb', line 123

def gencallback(ty, calltype, proc_entry, argc, n)
  dltype = DLTYPE[ty]
  ret = dltype[:conv]
  src = <<-EOS
#{calltype == STDCALL ? "\n#ifdef FUNC_STDCALL" : ""}
static #{dltype[:type]}
FUNC_#{calltype.upcase}(#{func_name(ty,argc,n,calltype)})(#{(0...argc).collect{|i| "DLSTACK_TYPE stack#{i}"}.join(", ")})
{
    VALUE #{ret ? "ret, " : ""}cb#{argc > 0 ? ", args[#{argc}]" : ""};
#{
      (0...argc).collect{|i|
        "\n    args[#{i}] = PTR2NUM(stack#{i});"
      }.join("")
}
    cb = rb_ary_entry(rb_ary_entry(#{proc_entry}, #{ty}), #{(n * DLSTACK_SIZE) + argc});
    #{ret ? "ret = " : ""}rb_funcall2(cb, rb_dl_cb_call, #{argc}, #{argc > 0 ? 'args' : 'NULL'});
  EOS
  src << "    return #{ret % "ret"};\n" if ret
  src << <<-EOS
}
#{calltype == STDCALL ? "#endif\n" : ""}
  EOS
end