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scd: Add explict functions for 'app' reference counting.

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* scd/app.c (app_ref): New.
(app_unref): New.
(release_application): Renamed to ...
(app_unref_locked): this and remove arg locked_already.  Change
callers to use this or app_ref.
* scd/command.c (open_card_with_request):
(cmd_pksign, cmd_pkauth, cmd_pkdecrypt): Use app_ref and app_unref
instead of accessing the counter directly.
--

This is better in case we need to debug stuff.  There is a real change
however: We now lock and unlock the app before changing the reference
count.

The whole app locking business should be reviewed because we pass
pointers along without immediately bumping the refcount.

Signed-off-by: Werner Koch <wk@gnupg.org>
This commit is contained in:
Werner Koch 2019-06-17 16:19:22 +02:00
parent 70f7b26287
commit c594dcfc93
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4 changed files with 55 additions and 23 deletions
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scd/scdaemon.h
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@ -129,7 +129,10 @@ void send_keyinfo (ctrl_t ctrl, int data, const char *keygrip_str,
const char *serialno, const char *idstr);
void popup_prompt (void *opaque, int on);
/* Take care: this function assumes that APP is locked. */
void send_client_notifications (app_t app, int removal);
void scd_kick_the_loop (void);
int get_active_connection_count (void);