Problem with macros..

sanddune008 · 07-07-2009, 12:54 AM

I have following code
Using microcontrollers

Code:

#define MALLOC(size)                  pvBosMemAlloc( size )
#define FREE ( a )                        bBosMemFree ( a )

typedef struct {
                          uint8 i;
                          char ch[6];
}mine;

uint8 zcl_SendCommand(mine *pMsg)
{
   mine *rcv;
   rcv = MALLOC(sizeof(mine));

   //Some code
 
  FREE (rcv);

}

I get following errors:

Source\zcl.c:267: error: 'a' undeclared (first use in this function)
Source\zcl.c:267: error: (Each undeclared identifier is reported only once
Source\zcl.c:267: error: for each function it appears in.)
Source\zcl.c:267: error: expected ';' before 'bBosMemFree'

What may be wrong with the code.....

Thanks

**laserlight** · 07-07-2009, 01:16 AM

Try changing this:

Code:

#define FREE ( a )                        bBosMemFree ( a )

to:

Code:

#define FREE(a) bBosMemFree( a )

sanddune008 · 07-07-2009, 01:34 AM

Thanks for your time......

Quote:

Originally Posted by laserlight

Try changing this:

Code:

#define FREE ( a )                        bBosMemFree ( a )

to:

Code:

#define FREE(a) bBosMemFree( a )

How does that help?

Anyways i tried didn't compile had same error....

Why does the error states:

error: 'a' undeclared (first use in this function)

**laserlight** · 07-07-2009, 01:46 AM

Quote:

Originally Posted by sanddune008

How does that help?

It should: the space means that you are defining FREE to be "(a) bBosMemFree( a )" instead of defining FREE(a) to be "bBosMemFree( a )".

Quote:

Originally Posted by sanddune008

Anyways i tried didn't compile had same error....

Why does the error states:

error: 'a' undeclared (first use in this function)

My guess is that you tried wrongly. Try this test program:

Code:

#include <stddef.h>

void *pvBosMemAlloc(size_t size)
{
    return NULL;
}

void *bBosMemFree(void *p)
{
    return p;
}

#define MALLOC(size) pvBosMemAlloc( size )
#define FREE(a)      bBosMemFree( a )

typedef unsigned char uint8;

typedef struct {
    uint8 i;
    char ch[6];
} mine;

uint8 zcl_SendCommand(mine *pMsg)
{
    mine *rcv;
    rcv = MALLOC(sizeof(mine));

    /*Some code*/

    FREE(rcv);

    return 0;
}

int main(void)
{
    return 0;
}

To demonstrate your error, change this:

Code:

#define FREE(a)      bBosMemFree( a )

to:

Code:

#define FREE (a)      bBosMemFree( a )

If you still face the same error after copying and pasting, then you should report a compiler bug to your compiler vendor.

sanddune008 · 07-07-2009, 02:00 AM

Thanks for your time.....

You were right there shouldn't space b/w FREE(a)

07-07-2009, 12:54 AM	#1
sanddune008 Registered User Join Date: Apr 2009 Posts: 53	Problem with macros.. I have following code Using microcontrollers Code: #define MALLOC(size) pvBosMemAlloc( size ) #define FREE ( a ) bBosMemFree ( a ) typedef struct { uint8 i; char ch[6]; }mine; uint8 zcl_SendCommand(mine pMsg) { mine rcv; rcv = MALLOC(sizeof(mine)); //Some code FREE (rcv); } I get following errors: Source\zcl.c:267: error: 'a' undeclared (first use in this function) Source\zcl.c:267: error: (Each undeclared identifier is reported only once Source\zcl.c:267: error: for each function it appears in.) Source\zcl.c:267: error: expected ';' before 'bBosMemFree' What may be wrong with the code..... Thanks
sanddune008 is offline

07-07-2009, 01:16 AM	#2
laserlight C++ Witch Join Date: Oct 2003 Location: Singapore Posts: 10,352	Try changing this: Code: #define FREE ( a ) bBosMemFree ( a ) to: Code: #define FREE(a) bBosMemFree( a ) __________________ C + C++ Compiler: MinGW port of GCC Build + Version Control System: SCons + Bazaar Look up a C/C++ Reference and learn How To Ask Questions The Smart Way
laserlight is offline

07-07-2009, 02:00 AM	#5
sanddune008 Registered User Join Date: Apr 2009 Posts: 53	Thanks for your time..... You were right there shouldn't space b/w FREE(a)
sanddune008 is offline

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