thread with callback procedure

hi,
I want write a thread and I want take over a procedure which should be called out of the thread, but I dont know how :(
Maybe, anybody can give me a hint ?
What I have made:
1. Building of a class (not all is included)
class CSerial
{
public:

CSerial (char *Device, bool Debug=false);
~CSerial();
void setPort (char *Device) {g_device = Device;};
bool openPort (char *Device = 0/*NULL*/, speed_t Baud = B19200);
void receive (int user_callback_proc(unsigned char*ReceivedData, int Size)); <-- this is the callback procedure of the class

};
2. Implementation of receive(...):
void CSerial::receive (int user_callback_proc(unsigned char*ReceivedData, int Size))
{ printf ("receive in CSerial start\n");
pthread_t receive_thread;
int iret;

ReceiveThreadProc ((void*)user_callback_proc); <--only a test if this callback in general ;)

iret = pthread_create( &receive_thread, 0/*NULL*/, /*CSerial::*/ReceiveThreadProc, (void*) user_callback_proc); <-- here I take over the address of the callback procedure

pthread_join( receive_thread, NULL);
printf("ReceivedData returns: %d\n",iret);
}
3. Implementation of the thread-procedure:
void *ReceiveThreadProc( void *ptr )
{ int i=1;
printf("ReceivedData thread : \n");
while (i < 100)
{ printf("%d ",i++);
//sleep (1000);
}
(void*)ptr ((char*)"hallo \n", 4);<--compile says "cannot use ptr as function", but how can I implement it ?
printf("\n");

thanks for the attention
regards

Zaita (1450)

http://www.boost.org/doc/libs/1_35_0/doc/html/thread.html

You can download the boost library which comes with a bunch of thread examples :)

Edit: If you could also post your complete code (so it can be attempted to be compiled) in proper [c0de] your code here [/c0de] (replace 0 with o) tags. That'd help too.


void *ReceiveThreadProc( void *ptr )

. This is not a function pointer that is being passed into the function.

Check out: http://www.newty.de/fpt/fpt.html

Last edited on

waldo (3)

Thanks for the links, I will try it,
I know, that it was not a pointer to a function but I didnt know to explain it (the problem ;)

regards

Last edited on

waldo (3)

I will give a short info:
declare a 'variable' to store a (callback-) procedure:
int (*g_callbackProc)(unsigned char*, int);
g_callbackProc=variable
(unsigned char*, int)=parameters of the (callback-)procedure
call of hte procedure:
g_callbackProc (Bytes, Length);
big thanks to Zaita, the link was very helpfull ;)

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