login_logout.c

#include <libspotify/api.h>
#include <pthread.h>
#include <stdio.h>
#include <sys/time.h>

extern const uint8_t g_appkey[];
extern const size_t g_appkey_size;

extern const char *username;
extern const char *password;

typedef enum {
    STATE_UNKNOWN,
    STATE_LOGGING_IN_ONGOING,
    STATE_LOGGED_IN,
    STATE_LOGGING_OUT_ONGOING,
    STATE_LOGGED_OUT
} state_e;

pthread_mutex_t g_lock;
pthread_cond_t g_wait;
int g_notify;
state_e g_state;

static SP_CALLCONV void logged_in_cb(sp_session *s, sp_error er);
static SP_CALLCONV void logged_out_cb(sp_session *s);
static SP_CALLCONV void notify_main_thread_cb(sp_session *s);

static sp_session_callbacks callbacks = {
    .logged_in = &logged_in_cb,
    .logged_out = &logged_out_cb,
    .notify_main_thread = &notify_main_thread_cb,
};

static sp_session_config config = {
    .api_version = SPOTIFY_API_VERSION,
    .application_key = g_appkey,
    .application_key_size = 0,
    .cache_location = "tmp",
    .user_agent = "just-a-silly-test",
    .callbacks = &callbacks
};

int main(int argc, char *argv[])
{
    sp_session *session;
    sp_error err;
    int next_timeout = 0;
    int iterations = 0;
    pthread_mutex_init(&g_lock, NULL);
    pthread_cond_init(&g_wait, NULL);

    config.application_key_size = g_appkey_size;

    while(1) {
        g_notify = 0;
        next_timeout = 0;
        g_state = STATE_UNKNOWN;

        printf("Creating session #%d\n", iterations++);
        err = sp_session_create(&config, &session);

        if (SP_ERROR_OK != err)
            printf("Error creating session: %s\n", sp_error_message(err));

        while (1) {
            if (g_state == STATE_LOGGED_OUT)
                break;

            pthread_mutex_lock(&g_lock);
            if (next_timeout == 0) {
                while (!g_notify) {
                    printf("---- Waiting\n");
                    pthread_cond_wait(&g_wait, &g_lock);
                }
            } else {
                struct timespec ts;
                struct timeval tv;
                gettimeofday(&tv, NULL);
                ts.tv_sec = tv.tv_sec + (next_timeout / 1000);
                ts.tv_nsec = (tv.tv_usec+1000UL) * (next_timeout % 1000);
                printf("---- Timed wait %d ms\n", next_timeout);
                pthread_cond_timedwait(&g_wait, &g_lock, &ts);
            }

            g_notify = 0;
            pthread_mutex_unlock(&g_lock);

            if (g_state == STATE_UNKNOWN) {
                printf("-- Login\n");
                err = sp_session_login(session, username, password, 0, NULL);
                if (SP_ERROR_OK != err)
                    printf("Error logging in: %s\n", sp_error_message(err));

                g_state = STATE_LOGGING_IN_ONGOING;
            }
            if (g_state == STATE_LOGGED_IN) {
                printf("-- Logout\n");
                err = sp_session_logout(session);
                if (SP_ERROR_OK != err)
                    printf("Error logging out: %s\n", sp_error_message(err));

                g_state = STATE_LOGGING_OUT_ONGOING;
            }

            do {
                printf("---- Processing\n");
                sp_session_process_events(session, &next_timeout);
            } while (next_timeout == 0);
        }
        printf("Releasing session\n");
        sp_session_release(session);
    }
    pthread_cond_destroy(&g_wait);
    pthread_mutex_destroy(&g_lock);

    return 0;
}

static SP_CALLCONV void logged_in_cb(sp_session *s, sp_error er)
{
    printf("-- Logged in\n");
    g_state = STATE_LOGGED_IN;
}

static SP_CALLCONV void logged_out_cb(sp_session *s)
{
    printf("-- Logged out\n");
    g_state = STATE_LOGGED_OUT;
}

static SP_CALLCONV void notify_main_thread_cb(sp_session *s)
{
    printf("---- Notify\n");
    pthread_mutex_lock(&g_lock);
    g_notify = 1;
    pthread_cond_signal(&g_wait);
    pthread_mutex_unlock(&g_lock);
}

stdout

Creating session #0
---- Notify
-- Login
---- Processing
---- Timed wait 300821 ms
---- Notify
---- Processing
---- Timed wait 300657 ms
---- Notify
---- Processing
---- Timed wait 300513 ms
---- Notify
---- Processing
---- Timed wait 300374 ms
---- Notify
---- Processing
---- Timed wait 300233 ms
---- Notify
---- Processing
---- Timed wait 300094 ms
---- Notify
---- Processing
---- Timed wait 299950 ms
---- Notify
---- Processing
-- Logged in
---- Notify
-- Logged out
Releasing session
Creating session #1
---- Notify
-- Login
---- Processing
---- Timed wait 300948 ms
---- Notify
---- Processing
---- Timed wait 300749 ms
---- Notify
---- Processing
---- Timed wait 300607 ms
---- Notify
---- Processing
---- Timed wait 300468 ms
---- Notify
---- Processing
---- Timed wait 300327 ms
---- Notify
---- Processing
---- Timed wait 300184 ms
---- Notify
---- Processing
---- Timed wait 300040 ms
---- Notify
---- Processing
-- Logged in
---- Timed wait 300040 ms
---- Notify
-- Logout
---- Processing
-- Logged out
Releasing session
Creating session #2
---- Notify
-- Login
---- Processing
---- Timed wait 300038 ms
---- Notify
---- Processing
---- Timed wait 299840 ms
---- Notify
---- Processing
---- Timed wait 299694 ms
---- Notify
---- Processing
---- Timed wait 299549 ms
---- Notify
---- Processing
---- Timed wait 299405 ms
---- Notify
---- Processing
---- Timed wait 299265 ms
---- Notify
---- Processing
---- Timed wait 299117 ms
---- Notify
---- Processing
-- Logged in
---- Timed wait 299117 ms
---- Notify
-- Logout
---- Processing
-- Logged out
Releasing session
Creating session #3
---- Notify
-- Login
---- Processing
---- Timed wait 300115 ms
---- Notify
---- Processing
---- Timed wait 299915 ms
---- Notify
---- Processing
---- Timed wait 299779 ms
---- Notify
---- Processing
---- Timed wait 299640 ms
---- Notify
---- Processing
---- Timed wait 299498 ms
---- Notify
---- Processing
---- Timed wait 299358 ms
---- Notify
---- Processing
---- Timed wait 299213 ms
---- Notify
---- Processing
-- Logged in
---- Timed wait 299213 ms
---- Notify
-- Logout