[flext] how to call the right setup function

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DesireData

Georg Holzmann

31 Oct 2005 31 Oct '05

1:44 p.m.

Hallo Thomas, list!

I have a problem with flext in the following situation: I derive from a class, which is derived from flext_dsp, but should have no setup function, ...

example:

class A : public flext_dsp { FLEXT_HEADER(A,flext_dsp)

[...]

// no setup function here }

class B : public A { FLEXT_HEADER_S(B,A,setup)

[...]

private:

static void setup(t_classid c); FLEXT_CALLBACK(some_methods_from_A_or_B) };

FLEXT_NEW_DSP_V("B_name",B)

void B::setup(t_classid c) { [...] }

everything compiles fine, but when I try to load B.pd_linux I get: load_object: Symbol "B_setup" not found

Thanks for any hints, LG Georg

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IOhannes m zmoelnig

31 Oct 31 Oct

3:15 p.m.

Georg Holzmann wrote:

...

Thanks for any hints,

since i am no flext-man i have little ideas, but: try running the pre-processor on your file (B.cpp), to see how all the macros expand. there has to be a "void B_setup(void)" function defined (in C-scope!), to make pd load it.

mfg.asdr. IOhannes

Georg Holzmann

3:29 p.m.

Hallo!

...

try running the pre-processor on your file (B.cpp), to see how all the macros expand.

thanks, but therefore I would have to understand the flext-buildsystem ... ;)

LG Georg

Georg Holzmann

5:05 p.m.

Hallo!

I just read the documentation on how to write libs in flext (should have done that before ... :) - and so it works: (but maybe there is also an other solution ? - because I don't need a library, I need only this single object ... ?)

class A : public flext_dsp { FLEXT_HEADER(A,flext_dsp)

[...]

// no setup function here }

class B : public A { FLEXT_HEADER_S(B,A,setup)

[...]

private:

static void setup(t_classid c); FLEXT_CALLBACK(some_methods_from_A_or_B) };

FLEXT_LIB_DSP_V("B",B)

void B::setup(t_classid c) { [...] }

static void lib_setup() { // call the objects' setup routines FLEXT_DSP_SETUP(B); }

// setup the library FLEXT_LIB_SETUP(B,lib_setup)

LG Georg

Georg Holzmann

5:26 p.m.

Hallo!

Unfortunately I have still some problem: when I make it in the way as below, the constructor of class A will be called before the setup function ... is that correct behauviour? The problem is, that I have to setup some stuff (at setup time), which is also needed by calls A ... :(

Thanks, LG Georg

...

class A : public flext_dsp { FLEXT_HEADER(A,flext_dsp)

[...]

// no setup function here }

class B : public A { FLEXT_HEADER_S(B,A,setup)

[...]

private:
static void setup(t_classid c);
FLEXT_CALLBACK(some_methods_from_A_or_B)
};

FLEXT_LIB_DSP_V("B",B)

void B::setup(t_classid c) { [...] }

static void lib_setup() { // call the objects' setup routines FLEXT_DSP_SETUP(B); }

// setup the library FLEXT_LIB_SETUP(B,lib_setup)

LG Georg

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Thomas Grill

1 Nov 1 Nov

3:16 p.m.

Hi,

...

when I make it in the way as below, the constructor of class A will be called before the setup function ... is that correct behauviour? The problem is, that I have to setup some stuff (at setup time), which is also needed by calls A ... :(

the constructor should only be called upon instantiation of an actual object, not during class setup (in the course of the lib_setup function). Do you have working source code illustrating the problem?

gr~~~

...

...
class A : public flext_dsp { FLEXT_HEADER(A,flext_dsp) [...] // no setup function here } class B : public A { FLEXT_HEADER_S(B,A,setup) [...] private: static void setup(t_classid c); FLEXT_CALLBACK(some_methods_from_A_or_B) }; FLEXT_LIB_DSP_V("B",B) void B::setup(t_classid c) { [...] } static void lib_setup() { // call the objects' setup routines FLEXT_DSP_SETUP(B); } // setup the library FLEXT_LIB_SETUP(B,lib_setup) LG Georg _______________________________________________ PD-dev mailing list PD-dev@iem.at http://lists.puredata.info/listinfo/pd-dev

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Georg Holzmann

2:46 p.m.

Hallo!

...

the constructor should only be called upon instantiation of an actual object, not during class setup (in the course of the lib_setup function).

yes - as it should ... forget it, I tried yesterday some stuff (different macros, modified them a little bit ...) - so now everything is okay again ...

LG Georg

Thomas Grill

3:13 p.m.

Hi Georg, the problem might be smaller than you think.... a DSP object (which is one derived from flext_dsp) needs to be called B~ and also the resulting binary. B_setup is not found, but B_tilde_setup would be. This restriction doesn't apply to object libraries.

gr~~~

Am 31.10.2005 um 13:44 schrieb Georg Holzmann:

...

Hallo Thomas, list!

I have a problem with flext in the following situation: I derive from a class, which is derived from flext_dsp, but should have no setup function, ...

example:

class A : public flext_dsp { FLEXT_HEADER(A,flext_dsp)

[...]

// no setup function here }

class B : public A { FLEXT_HEADER_S(B,A,setup)

[...]

private:
static void setup(t_classid c);
FLEXT_CALLBACK(some_methods_from_A_or_B)
};

FLEXT_NEW_DSP_V("B_name",B)

void B::setup(t_classid c) { [...] }

everything compiles fine, but when I try to load B.pd_linux I get: load_object: Symbol "B_setup" not found

Thanks for any hints, LG Georg

PD-dev mailing list PD-dev@iem.at http://lists.puredata.info/listinfo/pd-dev

Georg Holzmann

2:44 p.m.

Hallo!

...

a DSP object (which is one derived from flext_dsp) needs to be called B~ and also the resulting binary. B_setup is not found, but B_tilde_setup would be.

wa - stupid me!!! why do I try to name an audio object without tilde !?

Thanks, no everything is working, LG Georg

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Georg Holzmann
IOhannes m zmoelnig
Thomas Grill