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I write a Thread class for LegOs with a simple interface like in Java or
CommonC++. I'm using
LegOs 0.2.4.
Below are my work till yet. The problem is in the Method Start(). The
line is marked with !!.
The error message is at the end of the file.
I havn't any idea how to cast a (Thread::*) to (*).
Can anyone help me, please?
Marc Kösling
/***** Thread.h **********************************/
#include <tm.h>
#include <unistd.h>
class Thread {
public:
Thread(priority_t p_Prio = PRIO_NORMAL, size_t p_Stack =
DEFAULT_STACK_SIZE);
virtual ~Thread();
virtual void Run() = 0;
void Stop();
void Start();
protected:
size_t m_Stack;
priority_t m_Prio;
int m_Pid;
private:
int runWrapper(int, char ** dummy);
};
/**** Thread.cpp **********************************/
Thread::Thread(priority_t p_Prio, size_t p_Stack) {
m_Prio = p_Prio;
m_Stack = p_Stack;
m_Pid = 0;
}
Thread::~Thread() {
Stop();
}
void Thread::Start() {
if(m_Pid == 0)
!! m_Pid = execi(&Thread::runWrapper, 0, (char**)NULL,
m_Prio, m_Stack);
}
void Thread::Stop() {
if(m_Pid != 0)
{
kill(m_Pid);
m_Pid = 0;
}
}
int Thread::runWrapper(int, char ** dummy) {
Run();
return 0;
}
void Thread::Run() {}
/usr/local/crossgcc/h8300-hitachi-hms/bin/h8300-hitachi-hms-g++ -DCXX
-O2 -fno-builtin
-fomit-frame-pointer -Wall -I/usr/local/legOS/include -
I/usr/local/legOS/include/lnp -I. -I../../boot/ -c
Thread.cpp -o Thread.o
Thread.cpp: In method `void Thread::Start()':
Thread.cpp:26: converting from `int (Thread::*)(int, char **)' to `int
(*)(int, char **)'
make: *** [Thread.o] Error 1
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Message has 1 Reply:
 | | Re: thread class for legOS
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| (...) IRC, every method in C++ has an implicit parameter wich is the object itself; that's why you can't cast it. Try the following (does someone have a nicer solution?): Put runWrapper() outside the class: int runWrapper(int, char **th) { (...) (22 years ago, 18-Jan-02, to lugnet.robotics.rcx.legos)
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