Add a mechanism for the logging system to report queued callbacks

Sometimes the logging system will queue a log message for later.
When it does this, the callback will either get flushed at the next
safe time, or from the second-elapsed callback.

But we're trying to eliminate the second-elapsed callback, so let's
make a way for the log system to tell its users about this.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/common/torlog.h b/src/common/torlog.h
index ac632ff521..de389883c0 100644
--- a/src/common/torlog.h
+++ b/src/common/torlog.h
@@ -154,6 +154,8 @@ int add_android_log(const log_severity_list_t *severity,
                     const char *android_identity_tag);
 #endif // HAVE_ANDROID_LOG_H.
 int add_callback_log(const log_severity_list_t *severity, log_callback cb);
+typedef void (*pending_callback_callback)(void);
+void logs_set_pending_callback_callback(pending_callback_callback cb);
 void logs_set_domain_logging(int enabled);
 int get_min_log_level(void);
 void switch_logs_debug(void);