This is my first experience with C, but a language is a language after the
3rd or 4th :)
I'm calling C for LDAP queries from Natural (Software AG "4"GL) in batch. And
it works, sort of.
One FM is IBM Tivoli Directory Server Client Programming for z/OS
If I use the sequence ldap_init, ldap_simple_bind_s, ldap_search,
ldap_unbind, it gets overloaded after 5 calls at the speed of batch. If I leave
out the unbind, it works for thousands of calls, but there is an obvious memory
leak.
So, I want to anchor the ldap handle in the main driving program. I made a
simple C stub:
extern int ret2nat (int *back_value, LDAP *ld, char *msg)
#include <ldap.h>
In ldap.h there is:
typedef struct ldap LDAP;
The examples use:
LDAP * ld;
To declare an ldap_handle which according to the listing is an:
ld 6270-1:1931 Class = parameter, Length = 4
Type = pointer to incomplete struct ldap
I have a function:
LDAP * bind_adlds(char *hostname, char *container, char *msg)
And I call it:
printf("ld before bind :%d\n",ld); /* ld before bind :286352012
ld = bind_adlds(hostname, container, msg) ;
printf("ld after bind :%d\n",ld); /* ld after bind :283317144
but the value is not returned to the caller of ret2nat.
Any attempts to use *ld in an assignment or even memcpy() get a complier
message:
ERROR CCN3285 /u/ldap/test.c:46 The indirection operator cannot be applied
to a pointer to an incomplete struct or union.
Or
WARNING CCN3068 /u/ldap/test.c:46 Operation between types "int*" and
"pointer to an incomplete type" is not allowed.
As I said, I am just learning how to spell C. I know I am fighting some kind of
battle of types. I welcome even derisive comments, if in the end thay help.
Dave Gibney
Information Technology Services
Washington State University
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