Hi Eric,
I guess I too am struggling with explaining the scenario I have here.
Lemme give it one last try. Please don't get me wrong, I truly
appreciate the time and patience on your side. Now I understand that
what I was trying to implement is not possible. So I am implementing a
workaround.
Lets say for reasons beyond my control I have multiple data structs for
different applications. Each of these structs has a header and some
data. All of the struct header members except for one member are unique
for each struct . Now I am trying to do some common operations on this
common member variable. Now I could move the common data to a struct and
then include it in the parent struct, but that would imply me having a
quite a few sub structs for each such operation.
The reason I initially thought this was possible was after checking the
generated app.c for another generic module I had tested a while ago.
For eg
/***********NesC module ******************/
typedef struct
{
message_t* ptrMsgUpperLayer;
message_t m_msgTx;
uint8_t m_cTickCntStart;
uint8_t iCRC;
}StructTxData;
typedef struct
{
addr_t addrRxSource;
uint8_t m_acRxPayLoad[TOSH_DATA_LENGTH];
uint8_t m_cNumPayloadBytes ;
uint8_t iCRC;
}StructRxData;
generic module AMTxMsgQueueM(typedef type)
{
//interfaces removed to reduce clutter
}
Implementation
{
void TestType(type* t)
{
//t->iCRC =0; does not compile
}
//implementation removed to reduce clutter
}
/***********************************/
After compiling app.c becomes
/**************app.c**************************/
typedef struct __nesc_unnamed4351 {
addr_t addrRxSource;
uint8_t m_acRxPayLoad[100];
uint8_t m_cNumPayloadBytes;
uint8_t iCRC;
}
StructRxData;
typedef StructRxData /*DymoServiceC.RxMsgQueueC*/AMTxMsgQueueC__1__type;
typedef /*DymoServiceC.RxMsgQueueC*/AMTxMsgQueueC__1__type
/*DymoServiceC.RxMsgQueueC.AMTxMsgQueueM*/AMTxMsgQueueM__1__type;
static inline void
/*DymoServiceC.RxMsgQueueC.AMTxMsgQueueM*/AMTxMsgQueueM__1__TestType(/*D
ymoServiceC.RxMsgQueueC.AMTxMsgQueueM*/AMTxMsgQueueM__1__type *t)
{
}
/***********************************/
This implies that 'AMTxMsgQueueM__1__type', which is an argument
passed to TestType(), is actually replaced by StructRxData. If I look
at app.c just as regular C file , I would assume that I could access any
member of StructRxData inside TestType()
Thanks once again for your time and patience.
Lewis
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