Hi Team,

We are working on migration of nsldap C sdk to OpenLDAP c sdk for our application client code. As part of this activity, replacing API one by one and also looking for constant replacement.

In NSLDAP C SDK: /* * Thread function callbacks (an API extension -- * LDAP_API_FEATURE_X_THREAD_FUNCTIONS). */ #define LDAP_OPT_THREAD_FN_PTRS 0x05 /* 5 - API extension */

/* * Thread callback functions: */ typedef void *(LDAP_C LDAP_CALLBACK LDAP_TF_MUTEX_ALLOC_CALLBACK)( void ); typedef void (LDAP_C LDAP_CALLBACK LDAP_TF_MUTEX_FREE_CALLBACK)( void *m ); typedef int (LDAP_C LDAP_CALLBACK LDAP_TF_MUTEX_LOCK_CALLBACK)( void *m ); typedef int (LDAP_C LDAP_CALLBACK LDAP_TF_MUTEX_UNLOCK_CALLBACK)( void *m ); typedef int (LDAP_C LDAP_CALLBACK LDAP_TF_GET_ERRNO_CALLBACK)( void ); typedef void (LDAP_C LDAP_CALLBACK LDAP_TF_SET_ERRNO_CALLBACK)( int e ); typedef int (LDAP_C LDAP_CALLBACK LDAP_TF_GET_LDERRNO_CALLBACK)( char **matchedp, char **errmsgp, void *arg ); typedef void (LDAP_C LDAP_CALLBACK LDAP_TF_SET_LDERRNO_CALLBACK)( int err, char *matched, char *errmsg, void *arg );

/* * Structure to hold thread function pointers: */ struct ldap_thread_fns { LDAP_TF_MUTEX_ALLOC_CALLBACK *ltf_mutex_alloc; LDAP_TF_MUTEX_FREE_CALLBACK *ltf_mutex_free; LDAP_TF_MUTEX_LOCK_CALLBACK *ltf_mutex_lock; LDAP_TF_MUTEX_UNLOCK_CALLBACK *ltf_mutex_unlock; LDAP_TF_GET_ERRNO_CALLBACK *ltf_get_errno; LDAP_TF_SET_ERRNO_CALLBACK *ltf_set_errno; LDAP_TF_GET_LDERRNO_CALLBACK *ltf_get_lderrno; LDAP_TF_SET_LDERRNO_CALLBACK *ltf_set_lderrno; void *ltf_lderrno_arg; }; nsldap c sdk has thread function pointers option to support multi thread functionality for client programs. In our existing code, we are using 'LDAP_OPT_THREAD_FN_PTRS' option with ldap_set_option API like "Client code usage: ldap_set_option(hLDAP, LDAP_OPT_THREAD_FN_PTRS, &tfns);".

Now, we are looking for similar functionality within OpenLDAP to use it in our client program. I Went through OpenLDAP documents and source code, but to my knowledge, did not get any equivalent one.

Could you please provide more details on this to achieve equivalent functionality of LDAP_OPT_THREAD_FN_PTRS with OpenLDAP?

Thank you