Re: Interfacing between Ada and C: records and structs

[Jeffrey Carter <spam.jrcarter.not@spam.not.acm.org>]

On 07/31/2012 09:27 AM, awdorrin wrote:
> I have some legacy code that I am working with, they share common data structures.
>
> Simplifying my code, In Ada, I have a record:
>
> type FP_SHARED_BUF_TYPE is
> record
>    LOCK_SHM_1 : aliased Mutex;
>    LOCK_SHM_2 : aliased Mutex;
>    LOCK_SHM_3 : aliased Mutex;
> end record;
>
> In C:
>
> struct FP_SHARED_TYPE {
>    pthread_mutex_t LOCK_SHM_1;
>    pthread_mutex_t LOCK_SHM_2;
>    pthread_mutex_t LOCK_SHM_3;
> };
>
> When I compile the program, the Ada code defines the record as:
>
> for FP_SHARED_BUF_TYPE'Alignment use 9;
> for FP_SHARED_BUF_TYPE use record
>    LOCK_SHM_1 at

Anything you define in Ada that should match something defined in C should have 
a "pragma Convention (C, ...);".

-- 
Jeff Carter
"The time has come to act, and act fast. I'm leaving."
Blazing Saddles
36



--- Posted via news://freenews.netfront.net/ - Complaints to news@netfront.net ---