In C++, compile error regarding SYS/BIOS "xdc_ptr"

Chris Jagielski

Hello!

I have the following simple code segment. It works in a .c project, but not in .cpp.

float *y;
y = Memory_alloc(NULL, 32, 0, NULL); //Error on THIS line
/* Do some computations, etc. with y */
Memory_free(NULL, y, 32);

In CCSv5, I get the following compile error:

#515 a value of type "xdc_Ptr" cannot be assigned to an entity of type "float *"

(Note that I still get this error if I declare "y" as float, int, double, etc.)

There seems to only be one e2e thread <link> regarding this error. Unfortunately, I don't understand the thread and I think it may discuss a different problem than what I'm having.

Could this mean that I can't use TI's SYS/BIOS dynamic memory allocation software in C++ projects?

over 11 years ago

0 George Mock over 11 years ago

TI__Guru**** 249420 points

You probably need to write ...

y = (float *) Memory_alloc(NULL, 32, 0, NULL);

I'll check with an XDC expert.

Thanks and regards,

-George

0 Chris Jagielski over 11 years ago in reply to George Mock

Expert 1630 points

George,

That worked! Thank you.

Is this probably because of some subtle difference in C++?

0 Sasha Slijepcevic over 11 years ago in reply to George Mock

TI__Mastermind 37985 points

xdc_Ptr is void*, and you have to cast void* in C++. So, you must use George's solution.

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In C++, compile error regarding SYS/BIOS "xdc_ptr"