/*

    simple_lock_test.c

    Initializes two contexts in two different threads and tries to get read locks on both at the same time.

    Hangs at line 24.

*/

#include <stdio.h>

#include <stdarg.h>

#include "test_ccapi_log.h"

#if defined(macintosh) || (defined(__MACH__) && defined(__APPLE__))

#include <TargetConditionals.h>

#endif

#ifdef TARGET_OS_MAC

#include <stdlib.h>

#include <pthread.h>

#include <Kerberos/CredentialsCache.h>

#else

#include "CredentialsCache.h"

#endif

void *other_thread (void) {

    cc_int32 err;

    cc_context_t context = NULL;

    err = cc_initialize(&context, ccapi_version_7, NULL, NULL);

    log_error("thread: attempting lock. may hang. err == %d", err);

    if (!err) {

        // hangs with cc_lock_read which should succeed immediately, but does not hang with write, upgrade, and downgrade, which fail immediately

        err = cc_context_lock(context, cc_lock_read, cc_lock_noblock);

    }

    if (context) {

        cc_context_unlock(context);

        cc_context_release(context);

        context = NULL;

    }

    log_error("thread: return. err == %d", err);

}

int main (int argc, char *argv[]) {

    cc_int32        err;

    int             status;

    cc_context_t    context = NULL;

#ifdef TARGET_OS_MAC

    pthread_t       thread_id;

#endif

    err = cc_initialize(&context, ccapi_version_7, NULL, NULL);

    if (!err) {

        err = cc_context_lock(context, cc_lock_read, cc_lock_noblock);

    }

    log_error("main: initialized and read locked context. err == %d", err);

#ifdef TARGET_OS_MAC

   status = pthread_create (&thread_id, NULL, (void *) other_thread, NULL);

    if (status != 0) {

        log_error("pthread_create() returned %d", status);

        exit(-1);

    }

    pthread_join(thread_id, NULL);

#else

#endif

    log_error("main: unlocking and releasing context. err == %d", err);

    if (context) {

        log_error("main: calling cc_context_unlock");

        cc_context_unlock(context);

        log_error("main: calling cc_context_release");

        cc_context_release(context);

        context = NULL;

    }

    log_error("main: return. err == %d", err);

#if defined(_WIN32)

    UNREFERENCED_PARAMETER(status);       // no whining!

#endif

    return 0;

}