🚀 go-pugleaf

Has anyone successfully invoked an object's member function via 
cthread_fork() and passed it an argument in addition to the 
'this' pointer?  I have successfully invoked a member function 
passing 'this' as the first argument, but am unable to have the 
member function receive the additional argument.  I have tried 
many permutations of the code below (including rearranging the 
order of the struct's members), but nothing seems to work.  One 
alternative is to pass data by adding another data member to the 
class.  This works, but it's not very satisfying.

Thanks in advance!  Please email to me directly, if possible.

Anne
wilson@cs.umd.edu
 
////----------------------------------------------------------
extern "C" {
#import <stdio.h>
#import <cthreads.h>
}

class B {
protected:
    int data;
public:
    B (int initval);
};

B::B (int initval) { 
  data = initval;
}

//------------------------------------------
typedef void (viP_func_ptr)(void*, int);					

class D : public B {
public:
    D(int);
    void addTo(int);
    void startThread(viP_func_ptr memberFn, int val);
};

typedef struct{
    void* me;
    int val1;
} argthing;

static argthing myArgs;

void D::startThread(viP_func_ptr* memberFn, int val){
    myArgs.me = this;
    myArgs.val1 = val;
    
    /* must pass 'this' to a member fn called via cthread_fork - 
     * C++ converts member fns to C fns with 'this' as first arg */
    cthread_detach(cthread_fork((cthread_fn_t) memberFn, (any_t)myArgs.me));
    sleep(1);
}
void D::addTo(int val) {
    printf (">>>>>>>>>In D::addTo, this, val = %d, %d\n", (int) this, val);
    data += *val;
}
D::D(int val) : B (val) {
    printf ("in Constructor: this = %d\n", (int) this);
    startThread((void*) addTo, 10);
    printf ("After call to startThread\n");
}

main () {

    D myD(20);
}