예제 #1
0
neuron::neuron(neuralNet& parent, size_t numWeights)
	: iWeightBegin(SIZE_MAX),
	iWeightEnd(SIZE_MAX),
	iNeuronIndex(SIZE_MAX)
{
	size_t _iWeightBegin = parent.weights.size();
	if (!IS_ALIGNED(_iWeightBegin)) { _iWeightBegin += ALIGN_SIZE - ALIGN_OF(_iWeightBegin); } 
	// set weight array begin and end:
	iWeightBegin = _iWeightBegin;
	iWeightEnd = iWeightBegin + numWeights; // allow 1 value for bias weight at the end

	parent.weights.resize(iWeightBegin + ((numWeights>0)?(numWeights+1):0), 0.0f);
	// always one value allocated for activations:
	iNeuronIndex = parent.activations.size();
	parent.activations.push_back(0.0f);
};
예제 #2
0
experienceNet::experienceNet(size_t _numFeatures, const experienceNetSettings& _cSet)
	: vals(),
	offsets(),
	eSet(_cSet),
	expAdd(_cSet.eType==EXPERIENCENET_HISTOGRAM?frequencyAdd_sse:_cSet.eType==EXPERIENCENET_RECENCY?recencyAdd_sse:NULL),
	numFeatures(_numFeatures),
	partition((1.0f) / ((float)eSet.numTaps - 1)),
	maxNormalRecip(1.0f / boost::math::pdf(boost::math::normal_distribution<float>(0.0f, eSet.extrapolation), 0.0f))
{
	assert(expAdd != NULL);
	assert(numFeatures > 0);
	size_t expandedTapSize = eSet.numTaps;
	if (!IS_ALIGNED(expandedTapSize)) { expandedTapSize += ALIGN_SIZE - ALIGN_OF(expandedTapSize); } 
	// fill val array:
	vals.assign(expandedTapSize * numFeatures, 0.0f);
	// assign offset array:
	offsets.reserve(numFeatures);
	for(size_t iFeature = 0; iFeature != numFeatures; ++iFeature)
	{
		offsets.push_back(iFeature * expandedTapSize);
	}
};
예제 #3
0
파일: fiddle.c 프로젝트: Danylyuk/first_app
void
Init_fiddle(void)
{
    /*
     * Document-module: Fiddle
     *
     * A libffi wrapper for Ruby.
     *
     * == Description
     *
     * Fiddle is an extension to translate a foreign function interface (FFI)
     * with ruby.
     *
     * It wraps {libffi}[http://sourceware.org/libffi/], a popular C library
     * which provides a portable interface that allows code written in one
     * language to call code written in another language.
     *
     * == Example
     *
     * Here we will use Fiddle::Function to wrap {floor(3) from
     * libm}[http://linux.die.net/man/3/floor]
     *
     *	    require 'fiddle'
     *
     *	    libm = Fiddle.dlopen('/lib/libm.so.6')
     *
     *	    floor = Fiddle::Function.new(
     *	      libm['floor'],
     *	      [Fiddle::TYPE_DOUBLE],
     *	      Fiddle::TYPE_DOUBLE
     *	    )
     *
     *	    puts floor.call(3.14159) #=> 3.0
     *
     *
     */
    mFiddle = rb_define_module("Fiddle");

    /*
     * Document-class: Fiddle::DLError
     *
     * standard dynamic load exception
     */
    rb_eFiddleError = rb_define_class_under(mFiddle, "DLError", rb_eStandardError);

    /* Document-const: TYPE_VOID
     *
     * C type - void
     */
    rb_define_const(mFiddle, "TYPE_VOID",      INT2NUM(TYPE_VOID));

    /* Document-const: TYPE_VOIDP
     *
     * C type - void*
     */
    rb_define_const(mFiddle, "TYPE_VOIDP",     INT2NUM(TYPE_VOIDP));

    /* Document-const: TYPE_CHAR
     *
     * C type - char
     */
    rb_define_const(mFiddle, "TYPE_CHAR",      INT2NUM(TYPE_CHAR));

    /* Document-const: TYPE_SHORT
     *
     * C type - short
     */
    rb_define_const(mFiddle, "TYPE_SHORT",     INT2NUM(TYPE_SHORT));

    /* Document-const: TYPE_INT
     *
     * C type - int
     */
    rb_define_const(mFiddle, "TYPE_INT",       INT2NUM(TYPE_INT));

    /* Document-const: TYPE_LONG
     *
     * C type - long
     */
    rb_define_const(mFiddle, "TYPE_LONG",      INT2NUM(TYPE_LONG));

#if HAVE_LONG_LONG
    /* Document-const: TYPE_LONG_LONG
     *
     * C type - long long
     */
    rb_define_const(mFiddle, "TYPE_LONG_LONG", INT2NUM(TYPE_LONG_LONG));
#endif

    /* Document-const: TYPE_FLOAT
     *
     * C type - float
     */
    rb_define_const(mFiddle, "TYPE_FLOAT",     INT2NUM(TYPE_FLOAT));

    /* Document-const: TYPE_DOUBLE
     *
     * C type - double
     */
    rb_define_const(mFiddle, "TYPE_DOUBLE",    INT2NUM(TYPE_DOUBLE));

    /* Document-const: TYPE_SIZE_T
     *
     * C type - size_t
     */
    rb_define_const(mFiddle, "TYPE_SIZE_T",   INT2NUM(TYPE_SIZE_T));

    /* Document-const: TYPE_SSIZE_T
     *
     * C type - ssize_t
     */
    rb_define_const(mFiddle, "TYPE_SSIZE_T",   INT2NUM(TYPE_SSIZE_T));

    /* Document-const: TYPE_PTRDIFF_T
     *
     * C type - ptrdiff_t
     */
    rb_define_const(mFiddle, "TYPE_PTRDIFF_T", INT2NUM(TYPE_PTRDIFF_T));

    /* Document-const: TYPE_INTPTR_T
     *
     * C type - intptr_t
     */
    rb_define_const(mFiddle, "TYPE_INTPTR_T",  INT2NUM(TYPE_INTPTR_T));

    /* Document-const: TYPE_UINTPTR_T
     *
     * C type - uintptr_t
     */
    rb_define_const(mFiddle, "TYPE_UINTPTR_T",  INT2NUM(TYPE_UINTPTR_T));

    /* Document-const: ALIGN_VOIDP
     *
     * The alignment size of a void*
     */
    rb_define_const(mFiddle, "ALIGN_VOIDP", INT2NUM(ALIGN_VOIDP));

    /* Document-const: ALIGN_CHAR
     *
     * The alignment size of a char
     */
    rb_define_const(mFiddle, "ALIGN_CHAR",  INT2NUM(ALIGN_CHAR));

    /* Document-const: ALIGN_SHORT
     *
     * The alignment size of a short
     */
    rb_define_const(mFiddle, "ALIGN_SHORT", INT2NUM(ALIGN_SHORT));

    /* Document-const: ALIGN_INT
     *
     * The alignment size of an int
     */
    rb_define_const(mFiddle, "ALIGN_INT",   INT2NUM(ALIGN_INT));

    /* Document-const: ALIGN_LONG
     *
     * The alignment size of a long
     */
    rb_define_const(mFiddle, "ALIGN_LONG",  INT2NUM(ALIGN_LONG));

#if HAVE_LONG_LONG
    /* Document-const: ALIGN_LONG_LONG
     *
     * The alignment size of a long long
     */
    rb_define_const(mFiddle, "ALIGN_LONG_LONG",  INT2NUM(ALIGN_LONG_LONG));
#endif

    /* Document-const: ALIGN_FLOAT
     *
     * The alignment size of a float
     */
    rb_define_const(mFiddle, "ALIGN_FLOAT", INT2NUM(ALIGN_FLOAT));

    /* Document-const: ALIGN_DOUBLE
     *
     * The alignment size of a double
     */
    rb_define_const(mFiddle, "ALIGN_DOUBLE",INT2NUM(ALIGN_DOUBLE));

    /* Document-const: ALIGN_SIZE_T
     *
     * The alignment size of a size_t
     */
    rb_define_const(mFiddle, "ALIGN_SIZE_T", INT2NUM(ALIGN_OF(size_t)));

    /* Document-const: ALIGN_SSIZE_T
     *
     * The alignment size of a ssize_t
     */
    rb_define_const(mFiddle, "ALIGN_SSIZE_T", INT2NUM(ALIGN_OF(size_t))); /* same as size_t */

    /* Document-const: ALIGN_PTRDIFF_T
     *
     * The alignment size of a ptrdiff_t
     */
    rb_define_const(mFiddle, "ALIGN_PTRDIFF_T", INT2NUM(ALIGN_OF(ptrdiff_t)));

    /* Document-const: ALIGN_INTPTR_T
     *
     * The alignment size of a intptr_t
     */
    rb_define_const(mFiddle, "ALIGN_INTPTR_T", INT2NUM(ALIGN_OF(intptr_t)));

    /* Document-const: ALIGN_UINTPTR_T
     *
     * The alignment size of a uintptr_t
     */
    rb_define_const(mFiddle, "ALIGN_UINTPTR_T", INT2NUM(ALIGN_OF(uintptr_t)));

    /* Document-const: WINDOWS
     *
     * Returns a boolean regarding whether the host is WIN32
     */
#if defined(_WIN32)
    rb_define_const(mFiddle, "WINDOWS", Qtrue);
#else
    rb_define_const(mFiddle, "WINDOWS", Qfalse);
#endif

    /* Document-const: SIZEOF_VOIDP
     *
     * size of a void*
     */
    rb_define_const(mFiddle, "SIZEOF_VOIDP", INT2NUM(sizeof(void*)));

    /* Document-const: SIZEOF_CHAR
     *
     * size of a char
     */
    rb_define_const(mFiddle, "SIZEOF_CHAR",  INT2NUM(sizeof(char)));

    /* Document-const: SIZEOF_SHORT
     *
     * size of a short
     */
    rb_define_const(mFiddle, "SIZEOF_SHORT", INT2NUM(sizeof(short)));

    /* Document-const: SIZEOF_INT
     *
     * size of an int
     */
    rb_define_const(mFiddle, "SIZEOF_INT",   INT2NUM(sizeof(int)));

    /* Document-const: SIZEOF_LONG
     *
     * size of a long
     */
    rb_define_const(mFiddle, "SIZEOF_LONG",  INT2NUM(sizeof(long)));

#if HAVE_LONG_LONG
    /* Document-const: SIZEOF_LONG_LONG
     *
     * size of a long long
     */
    rb_define_const(mFiddle, "SIZEOF_LONG_LONG",  INT2NUM(sizeof(LONG_LONG)));
#endif

    /* Document-const: SIZEOF_FLOAT
     *
     * size of a float
     */
    rb_define_const(mFiddle, "SIZEOF_FLOAT", INT2NUM(sizeof(float)));

    /* Document-const: SIZEOF_DOUBLE
     *
     * size of a double
     */
    rb_define_const(mFiddle, "SIZEOF_DOUBLE",INT2NUM(sizeof(double)));

    /* Document-const: SIZEOF_SIZE_T
     *
     * size of a size_t
     */
    rb_define_const(mFiddle, "SIZEOF_SIZE_T",  INT2NUM(sizeof(size_t)));

    /* Document-const: SIZEOF_SSIZE_T
     *
     * size of a ssize_t
     */
    rb_define_const(mFiddle, "SIZEOF_SSIZE_T",  INT2NUM(sizeof(size_t))); /* same as size_t */

    /* Document-const: SIZEOF_PTRDIFF_T
     *
     * size of a ptrdiff_t
     */
    rb_define_const(mFiddle, "SIZEOF_PTRDIFF_T",  INT2NUM(sizeof(ptrdiff_t)));

    /* Document-const: SIZEOF_INTPTR_T
     *
     * size of a intptr_t
     */
    rb_define_const(mFiddle, "SIZEOF_INTPTR_T",  INT2NUM(sizeof(intptr_t)));

    /* Document-const: SIZEOF_UINTPTR_T
     *
     * size of a uintptr_t
     */
    rb_define_const(mFiddle, "SIZEOF_UINTPTR_T",  INT2NUM(sizeof(uintptr_t)));

    /* Document-const: RUBY_FREE
     *
     * Address of the ruby_xfree() function
     */
    rb_define_const(mFiddle, "RUBY_FREE", PTR2NUM(ruby_xfree));

    /* Document-const: BUILD_RUBY_PLATFORM
     *
     * Platform built against (i.e. "x86_64-linux", etc.)
     *
     * See also RUBY_PLATFORM
     */
    rb_define_const(mFiddle, "BUILD_RUBY_PLATFORM", rb_str_new2(RUBY_PLATFORM));

    rb_define_module_function(mFiddle, "dlwrap", rb_fiddle_value2ptr, 1);
    rb_define_module_function(mFiddle, "dlunwrap", rb_fiddle_ptr2value, 1);
    rb_define_module_function(mFiddle, "malloc", rb_fiddle_malloc, 1);
    rb_define_module_function(mFiddle, "realloc", rb_fiddle_realloc, 2);
    rb_define_module_function(mFiddle, "free", rb_fiddle_free, 1);

    Init_fiddle_function();
    Init_fiddle_closure();
    Init_fiddle_handle();
    Init_fiddle_pointer();
}
예제 #4
0
void
Init_dl(void)
{
    void Init_dlhandle(void);
    void Init_dlcfunc(void);
    void Init_dlptr(void);

    rbdl_id_cdecl = rb_intern_const("cdecl");
    rbdl_id_stdcall = rb_intern_const("stdcall");

    /* Document-module: DL
     *
     * A bridge to the dlopen() or dynamic library linker function.
     *
     * == Example
     *
     *   bash $> cat > sum.c <<EOF
     *   double sum(double *arry, int len)
     *   {
     *           double ret = 0;
     *           int i;
     *           for(i = 0; i < len; i++){
     *                   ret = ret + arry[i];
     *           }
     *           return ret;
     *   }
     *
     *   double split(double num)
     *   {
     *           double ret = 0;
     *           ret = num / 2;
     *           return ret;
     *   }
     *   EOF
     *   bash $> gcc -o libsum.so -shared sum.c
     *   bash $> cat > sum.rb <<EOF
     *   require 'dl'
     *   require 'dl/import'
     *
     *   module LibSum
     *           extend DL::Importer
     *           dlload './libsum.so'
     *           extern 'double sum(double*, int)'
     *           extern 'double split(double)'
     *   end
     *
     *   a = [2.0, 3.0, 4.0]
     *
     *   sum = LibSum.sum(a.pack("d*"), a.count)
     *   p LibSum.split(sum)
     *   EOF
     *   bash $> ruby sum.rb
     *   4.5
     *
     * WIN! :-)
     */
    rb_mDL = rb_define_module("DL");

    /*
     * Document-class: DL::DLError
     *
     * standard dynamic load exception
     */
    rb_eDLError = rb_define_class_under(rb_mDL, "DLError", rb_eStandardError);

    /*
     * Document-class: DL::DLTypeError
     *
     * dynamic load incorrect type exception
     */
    rb_eDLTypeError = rb_define_class_under(rb_mDL, "DLTypeError", rb_eDLError);

    /* Document-const: MAX_CALLBACK
     *
     * Maximum number of callbacks
     */
    rb_define_const(rb_mDL, "MAX_CALLBACK", INT2NUM(MAX_CALLBACK));

    /* Document-const: DLSTACK_SIZE
     *
     * Dynamic linker stack size
     */
    rb_define_const(rb_mDL, "DLSTACK_SIZE", INT2NUM(DLSTACK_SIZE));

    rb_dl_init_callbacks(rb_mDL);

    /* Document-const: RTLD_GLOBAL
     *
     * rtld DL::Handle flag.
     *
     * The symbols defined by this library will be made available for symbol
     * resolution of subsequently loaded libraries.
     */
    rb_define_const(rb_mDL, "RTLD_GLOBAL", INT2NUM(RTLD_GLOBAL));

    /* Document-const: RTLD_LAZY
     *
     * rtld DL::Handle flag.
     *
     * Perform lazy binding.  Only resolve symbols as the code that references
     * them is executed.  If the  symbol is never referenced, then it is never
     * resolved.  (Lazy binding is only performed for function references;
     * references to variables are always immediately bound when the library
     * is loaded.)
     */
    rb_define_const(rb_mDL, "RTLD_LAZY",   INT2NUM(RTLD_LAZY));

    /* Document-const: RTLD_NOW
     *
     * rtld DL::Handle flag.
     *
     * If this value is specified or the environment variable LD_BIND_NOW is
     * set to a nonempty string, all undefined symbols in the library are
     * resolved before dlopen() returns.  If this cannot be done an error is
     * returned.
     */
    rb_define_const(rb_mDL, "RTLD_NOW",    INT2NUM(RTLD_NOW));

    /* Document-const: TYPE_VOID
     *
     * DL::CFunc type - void
     */
    rb_define_const(rb_mDL, "TYPE_VOID",  INT2NUM(DLTYPE_VOID));

    /* Document-const: TYPE_VOIDP
     *
     * DL::CFunc type - void*
     */
    rb_define_const(rb_mDL, "TYPE_VOIDP",  INT2NUM(DLTYPE_VOIDP));

    /* Document-const: TYPE_CHAR
     *
     * DL::CFunc type - char
     */
    rb_define_const(rb_mDL, "TYPE_CHAR",  INT2NUM(DLTYPE_CHAR));

    /* Document-const: TYPE_SHORT
     *
     * DL::CFunc type - short
     */
    rb_define_const(rb_mDL, "TYPE_SHORT",  INT2NUM(DLTYPE_SHORT));

    /* Document-const: TYPE_INT
     *
     * DL::CFunc type - int
     */
    rb_define_const(rb_mDL, "TYPE_INT",  INT2NUM(DLTYPE_INT));

    /* Document-const: TYPE_LONG
     *
     * DL::CFunc type - long
     */
    rb_define_const(rb_mDL, "TYPE_LONG",  INT2NUM(DLTYPE_LONG));

#if HAVE_LONG_LONG
    /* Document-const: TYPE_LONG_LONG
     *
     * DL::CFunc type - long long
     */
    rb_define_const(rb_mDL, "TYPE_LONG_LONG",  INT2NUM(DLTYPE_LONG_LONG));
#endif

    /* Document-const: TYPE_FLOAT
     *
     * DL::CFunc type - float
     */
    rb_define_const(rb_mDL, "TYPE_FLOAT",  INT2NUM(DLTYPE_FLOAT));

    /* Document-const: TYPE_DOUBLE
     *
     * DL::CFunc type - double
     */
    rb_define_const(rb_mDL, "TYPE_DOUBLE",  INT2NUM(DLTYPE_DOUBLE));

    /* Document-const: TYPE_SIZE_T
     *
     * DL::CFunc type - size_t
     */
    rb_define_const(rb_mDL, "TYPE_SIZE_T",  INT2NUM(DLTYPE_SIZE_T));

    /* Document-const: TYPE_SSIZE_T
     *
     * DL::CFunc type - ssize_t
     */
    rb_define_const(rb_mDL, "TYPE_SSIZE_T", INT2NUM(DLTYPE_SSIZE_T));

    /* Document-const: TYPE_PTRDIFF_T
     *
     * DL::CFunc type - ptrdiff_t
     */
    rb_define_const(rb_mDL, "TYPE_PTRDIFF_T", INT2NUM(DLTYPE_PTRDIFF_T));

    /* Document-const: TYPE_INTPTR_T
     *
     * DL::CFunc type - intptr_t
     */
    rb_define_const(rb_mDL, "TYPE_INTPTR_T", INT2NUM(DLTYPE_INTPTR_T));

    /* Document-const: TYPE_UINTPTR_T
     *
     * DL::CFunc type - uintptr_t
     */
    rb_define_const(rb_mDL, "TYPE_UINTPTR_T", INT2NUM(DLTYPE_UINTPTR_T));

    /* Document-const: ALIGN_VOIDP
     *
     * The alignment size of a void*
     */
    rb_define_const(rb_mDL, "ALIGN_VOIDP", INT2NUM(ALIGN_VOIDP));

    /* Document-const: ALIGN_CHAR
     *
     * The alignment size of a char
     */
    rb_define_const(rb_mDL, "ALIGN_CHAR",  INT2NUM(ALIGN_CHAR));

    /* Document-const: ALIGN_SHORT
     *
     * The alignment size of a short
     */
    rb_define_const(rb_mDL, "ALIGN_SHORT", INT2NUM(ALIGN_SHORT));

    /* Document-const: ALIGN_INT
     *
     * The alignment size of an int
     */
    rb_define_const(rb_mDL, "ALIGN_INT",   INT2NUM(ALIGN_INT));

    /* Document-const: ALIGN_LONG
     *
     * The alignment size of a long
     */
    rb_define_const(rb_mDL, "ALIGN_LONG",  INT2NUM(ALIGN_LONG));

#if HAVE_LONG_LONG
    /* Document-const: ALIGN_LONG_LONG
     *
     * The alignment size of a long long
     */
    rb_define_const(rb_mDL, "ALIGN_LONG_LONG",  INT2NUM(ALIGN_LONG_LONG));
#endif

    /* Document-const: ALIGN_FLOAT
     *
     * The alignment size of a float
     */
    rb_define_const(rb_mDL, "ALIGN_FLOAT", INT2NUM(ALIGN_FLOAT));

    /* Document-const: ALIGN_DOUBLE
     *
     * The alignment size of a double
     */
    rb_define_const(rb_mDL, "ALIGN_DOUBLE",INT2NUM(ALIGN_DOUBLE));

    /* Document-const: ALIGN_SIZE_T
     *
     * The alignment size of a size_t
     */
    rb_define_const(rb_mDL, "ALIGN_SIZE_T", INT2NUM(ALIGN_OF(size_t)));

    /* Document-const: ALIGN_SSIZE_T
     *
     * The alignment size of a ssize_t
     */
    rb_define_const(rb_mDL, "ALIGN_SSIZE_T", INT2NUM(ALIGN_OF(size_t))); /* same as size_t */

    /* Document-const: ALIGN_PTRDIFF_T
     *
     * The alignment size of a ptrdiff_t
     */
    rb_define_const(rb_mDL, "ALIGN_PTRDIFF_T", INT2NUM(ALIGN_OF(ptrdiff_t)));

    /* Document-const: ALIGN_INTPTR_T
     *
     * The alignment size of a intptr_t
     */
    rb_define_const(rb_mDL, "ALIGN_INTPTR_T", INT2NUM(ALIGN_OF(intptr_t)));

    /* Document-const: ALIGN_UINTPTR_T
     *
     * The alignment size of a uintptr_t
     */
    rb_define_const(rb_mDL, "ALIGN_UINTPTR_T", INT2NUM(ALIGN_OF(uintptr_t)));

    /* Document-const: SIZEOF_VOIDP
     *
     * size of a void*
     */
    rb_define_const(rb_mDL, "SIZEOF_VOIDP", INT2NUM(sizeof(void*)));

    /* Document-const: SIZEOF_CHAR
     *
     * size of a char
     */
    rb_define_const(rb_mDL, "SIZEOF_CHAR",  INT2NUM(sizeof(char)));

    /* Document-const: SIZEOF_SHORT
     *
     * size of a short
     */
    rb_define_const(rb_mDL, "SIZEOF_SHORT", INT2NUM(sizeof(short)));

    /* Document-const: SIZEOF_INT
     *
     * size of an int
     */
    rb_define_const(rb_mDL, "SIZEOF_INT",   INT2NUM(sizeof(int)));

    /* Document-const: SIZEOF_LONG
     *
     * size of a long
     */
    rb_define_const(rb_mDL, "SIZEOF_LONG",  INT2NUM(sizeof(long)));

#if HAVE_LONG_LONG
    /* Document-const: SIZEOF_LONG_LONG
     *
     * size of a long long
     */
    rb_define_const(rb_mDL, "SIZEOF_LONG_LONG",  INT2NUM(sizeof(LONG_LONG)));
#endif

    /* Document-const: SIZEOF_FLOAT
     *
     * size of a float
     */
    rb_define_const(rb_mDL, "SIZEOF_FLOAT", INT2NUM(sizeof(float)));

    /* Document-const: SIZEOF_DOUBLE
     *
     * size of a double
     */
    rb_define_const(rb_mDL, "SIZEOF_DOUBLE",INT2NUM(sizeof(double)));

    /* Document-const: SIZEOF_SIZE_T
     *
     * size of a size_t
     */
    rb_define_const(rb_mDL, "SIZEOF_SIZE_T",  INT2NUM(sizeof(size_t)));

    /* Document-const: SIZEOF_SSIZE_T
     *
     * size of a ssize_t
     */
    rb_define_const(rb_mDL, "SIZEOF_SSIZE_T",  INT2NUM(sizeof(size_t))); /* same as size_t */

    /* Document-const: SIZEOF_PTRDIFF_T
     *
     * size of a ptrdiff_t
     */
    rb_define_const(rb_mDL, "SIZEOF_PTRDIFF_T",  INT2NUM(sizeof(ptrdiff_t)));

    /* Document-const: SIZEOF_INTPTR_T
     *
     * size of a intptr_t
     */
    rb_define_const(rb_mDL, "SIZEOF_INTPTR_T",  INT2NUM(sizeof(intptr_t)));

    /* Document-const: SIZEOF_UINTPTR_T
     *
     * size of a intptr_t
     */
    rb_define_const(rb_mDL, "SIZEOF_UINTPTR_T",  INT2NUM(sizeof(uintptr_t)));

    rb_define_module_function(rb_mDL, "dlwrap", rb_dl_value2ptr, 1);
    rb_define_module_function(rb_mDL, "dlunwrap", rb_dl_ptr2value, 1);

    rb_define_module_function(rb_mDL, "dlopen", rb_dl_dlopen, -1);
    rb_define_module_function(rb_mDL, "malloc", rb_dl_malloc, 1);
    rb_define_module_function(rb_mDL, "realloc", rb_dl_realloc, 2);
    rb_define_module_function(rb_mDL, "free", rb_dl_free, 1);

    /* Document-const: RUBY_FREE
     *
     * Address of the ruby_xfree() function
     */
    rb_define_const(rb_mDL, "RUBY_FREE", PTR2NUM(ruby_xfree));

    /* Document-const: BUILD_RUBY_PLATFORM
     *
     * Platform built against (i.e. "x86_64-linux", etc.)
     *
     * See also RUBY_PLATFORM
     */
    rb_define_const(rb_mDL, "BUILD_RUBY_PLATFORM", rb_str_new2(RUBY_PLATFORM));

    /* Document-const: BUILD_RUBY_VERSION
     *
     * Ruby Version built. (i.e. "1.9.3")
     *
     * See also RUBY_VERSION
     */
    rb_define_const(rb_mDL, "BUILD_RUBY_VERSION",  rb_str_new2(RUBY_VERSION));

    Init_dlhandle();
    Init_dlcfunc();
    Init_dlptr();
}