int sc_unlock(sc_card_t *card)
{
int r, r2;
SC_FUNC_CALLED(card->ctx, SC_LOG_DEBUG_NORMAL);
if (card == NULL)
return SC_ERROR_INVALID_ARGUMENTS;
r = sc_mutex_lock(card->ctx, card->mutex);
if (r != SC_SUCCESS)
return r;
assert(card->lock_count >= 1);
if (--card->lock_count == 0) {
#ifdef INVALIDATE_CARD_CACHE_IN_UNLOCK
/* invalidate cache */
memset(&card->cache, 0, sizeof(card->cache));
card->cache.valid = 0;
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL, "cache invalidated");
#endif
/* release reader lock */
if (card->reader->ops->unlock != NULL)
r = card->reader->ops->unlock(card->reader);
}
r2 = sc_mutex_unlock(card->ctx, card->mutex);
if (r2 != SC_SUCCESS) {
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL, "unable to release lock");
r = (r == SC_SUCCESS) ? r2 : r;
}
return r;
}
int sc_unlock(sc_card_t *card)
{
int r, r2;
if (!card)
return SC_ERROR_INVALID_ARGUMENTS;
LOG_FUNC_CALLED(card->ctx);
r = sc_mutex_lock(card->ctx, card->mutex);
if (r != SC_SUCCESS)
return r;
if (card->lock_count < 1) {
return SC_ERROR_INVALID_ARGUMENTS;
}
if (--card->lock_count == 0) {
if (card->flags & SC_CARD_FLAG_KEEP_ALIVE) {
/* Multiple processes accessing the card will most likely render
* the card cache useless. To not have a bad cache, we explicitly
* invalidate it. */
sc_invalidate_cache(card);
}
/* release reader lock */
if (card->reader->ops->unlock != NULL)
r = card->reader->ops->unlock(card->reader);
}
r2 = sc_mutex_unlock(card->ctx, card->mutex);
if (r2 != SC_SUCCESS) {
sc_log(card->ctx, "unable to release lock");
r = (r == SC_SUCCESS) ? r2 : r;
}
return r;
}
int sc_lock(sc_card_t *card)
{
int r = 0, r2 = 0;
SC_FUNC_CALLED(card->ctx, SC_LOG_DEBUG_NORMAL);
if (card == NULL)
return SC_ERROR_INVALID_ARGUMENTS;
r = sc_mutex_lock(card->ctx, card->mutex);
if (r != SC_SUCCESS)
return r;
if (card->lock_count == 0) {
if (card->reader->ops->lock != NULL) {
r = card->reader->ops->lock(card->reader);
if (r == SC_ERROR_CARD_RESET || r == SC_ERROR_READER_REATTACHED) {
/* invalidate cache */
memset(&card->cache, 0, sizeof(card->cache));
card->cache.valid = 0;
r = card->reader->ops->lock(card->reader);
}
}
if (r == 0)
card->cache.valid = 1;
}
if (r == 0)
card->lock_count++;
r2 = sc_mutex_unlock(card->ctx, card->mutex);
if (r2 != SC_SUCCESS) {
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL, "unable to release lock");
r = r != SC_SUCCESS ? r : r2;
}
return r;
}
int sc_reset(sc_card_t *card, int do_cold_reset)
{
int r, r2;
if (card == NULL)
return SC_ERROR_INVALID_ARGUMENTS;
if (card->reader->ops->reset == NULL)
return SC_ERROR_NOT_SUPPORTED;
r = sc_mutex_lock(card->ctx, card->mutex);
if (r != SC_SUCCESS)
return r;
r = card->reader->ops->reset(card->reader, do_cold_reset);
/* invalidate cache */
memset(&card->cache, 0, sizeof(card->cache));
card->cache.valid = 0;
r2 = sc_mutex_unlock(card->ctx, card->mutex);
if (r2 != SC_SUCCESS) {
sc_debug(card->ctx, SC_LOG_DEBUG_NORMAL, "unable to release lock");
r = r != SC_SUCCESS ? r : r2;
}
return r;
}
int sc_lock(sc_card_t *card)
{
int r = 0, r2 = 0;
int was_reset = 0;
int reader_lock_obtained = 0;
if (card == NULL)
return SC_ERROR_INVALID_ARGUMENTS;
LOG_FUNC_CALLED(card->ctx);
r = sc_mutex_lock(card->ctx, card->mutex);
if (r != SC_SUCCESS)
return r;
if (card->lock_count == 0) {
if (card->reader->ops->lock != NULL) {
r = card->reader->ops->lock(card->reader);
while (r == SC_ERROR_CARD_RESET || r == SC_ERROR_READER_REATTACHED) {
sc_invalidate_cache(card);
if (was_reset++ > 4) /* TODO retry a few times */
break;
r = card->reader->ops->lock(card->reader);
}
if (r == 0)
reader_lock_obtained = 1;
}
if (r == 0)
card->cache.valid = 1;
}
if (r == 0)
card->lock_count++;
if (r == 0 && was_reset > 0) {
#ifdef ENABLE_SM
if (card->sm_ctx.ops.open)
card->sm_ctx.ops.open(card);
#endif
}
r2 = sc_mutex_unlock(card->ctx, card->mutex);
if (r2 != SC_SUCCESS) {
sc_log(card->ctx, "unable to release card->mutex lock");
r = r != SC_SUCCESS ? r : r2;
}
/* give card driver a chance to do something when reader lock first obtained */
if (r == 0 && reader_lock_obtained == 1 && card->ops->card_reader_lock_obtained)
r = card->ops->card_reader_lock_obtained(card, was_reset);
LOG_FUNC_RETURN(card->ctx, r);
}
int sc_ctx_detect_readers(sc_context_t *ctx)
{
int r = 0;
const struct sc_reader_driver *drv = ctx->reader_driver;
sc_mutex_lock(ctx, ctx->mutex);
if (drv->ops->detect_readers != NULL)
r = drv->ops->detect_readers(ctx);
sc_mutex_unlock(ctx, ctx->mutex);
return r;
}
int sc_lock(sc_card_t *card)
{
int r = 0, r2 = 0;
if (card == NULL)
return SC_ERROR_INVALID_ARGUMENTS;
LOG_FUNC_CALLED(card->ctx);
r = sc_mutex_lock(card->ctx, card->mutex);
if (r != SC_SUCCESS)
return r;
if (card->lock_count == 0) {
if (card->reader->ops->lock != NULL) {
r = card->reader->ops->lock(card->reader);
if (r == SC_ERROR_CARD_RESET || r == SC_ERROR_READER_REATTACHED) {
/* invalidate cache */
memset(&card->cache, 0, sizeof(card->cache));
card->cache.valid = 0;
#ifdef ENABLE_SM
if (card->sm_ctx.ops.open)
card->sm_ctx.ops.open(card);
#endif
r = card->reader->ops->lock(card->reader);
}
}
if (r == 0)
card->cache.valid = 1;
}
if (r == 0)
card->lock_count++;
r2 = sc_mutex_unlock(card->ctx, card->mutex);
if (r2 != SC_SUCCESS) {
sc_log(card->ctx, "unable to release lock");
r = r != SC_SUCCESS ? r : r2;
}
return r;
}
int sc_set_card_driver(sc_context_t *ctx, const char *short_name)
{
int i = 0, match = 0;
sc_mutex_lock(ctx, ctx->mutex);
if (short_name == NULL) {
ctx->forced_driver = NULL;
match = 1;
} else while (ctx->card_drivers[i] != NULL && i < SC_MAX_CARD_DRIVERS) {
struct sc_card_driver *drv = ctx->card_drivers[i];
if (strcmp(short_name, drv->short_name) == 0) {
ctx->forced_driver = drv;
match = 1;
break;
}
i++;
}
sc_mutex_unlock(ctx, ctx->mutex);
if (match == 0)
return SC_ERROR_OBJECT_NOT_FOUND; /* FIXME: invent error */
return SC_SUCCESS;
}
int sc_reset(sc_card_t *card, int do_cold_reset)
{
int r, r2;
if (card == NULL)
return SC_ERROR_INVALID_ARGUMENTS;
if (card->reader->ops->reset == NULL)
return SC_ERROR_NOT_SUPPORTED;
r = sc_mutex_lock(card->ctx, card->mutex);
if (r != SC_SUCCESS)
return r;
r = card->reader->ops->reset(card->reader, do_cold_reset);
sc_invalidate_cache(card);
r2 = sc_mutex_unlock(card->ctx, card->mutex);
if (r2 != SC_SUCCESS) {
sc_log(card->ctx, "unable to release lock");
r = r != SC_SUCCESS ? r : r2;
}
return r;
}