as discussed during camp and otherwise ... add dc_perform_{mvbox,sentbox}_jobs hooks which, however, for now have an empty implementation. They can already be called from UIs, though. Next step is refactoring imap-job handling to only execute jobs belonging to the respective imap folder.

deltachat-ffi/deltachat.h

@@ -610,12 +610,8 @@ void            dc_interrupt_imap_idle       (dc_context_t* context);
 
 
 /**
- * Fetch new messages from the MVBOX, if any.
- * The MVBOX is a folder on the account where chat messages are moved to.
- * The moving is done to not disturb shared accounts that are used by both,
- * Delta Chat and a classical MUA.
- *
- * This function and dc_perform_mvbox_idle()
+ * Execute pending mvbox-jobs.
+ * This function and dc_perform_mvbox_fetch() and dc_perform_mvbox_idle()
  * must be called from the same thread, typically in a loop.
  *
  * Example:
@@ -623,6 +619,7 @@ void            dc_interrupt_imap_idle       (dc_context_t* context);
  *     void* mvbox_thread_func(void* context)
  *     {
  *         while (true) {
+ *             dc_perform_mvbox_jobs(context);
  *             dc_perform_mvbox_fetch(context);
  *             dc_perform_mvbox_idle(context);
  *         }
@@ -636,13 +633,26 @@ void            dc_interrupt_imap_idle       (dc_context_t* context);
  *
  *     // network becomes available again -
  *     // the interrupt causes dc_perform_mvbox_idle() in the thread above
- *     // to return so that and messages are fetched.
+ *     // to return so that jobs are executed and messages are fetched.
  *     dc_maybe_network(context);
  *
  * @memberof dc_context_t
  * @param context The context as created by dc_context_new().
  * @return None.
  */
+void            dc_perform_mvbox_jobs         (dc_context_t* context);
+
+
+/**
+ * Fetch new messages from the MVBOX, if any.
+ * The MVBOX is a folder on the account where chat messages are moved to.
+ * The moving is done to not disturb shared accounts that are used by both,
+ * Delta Chat and a classical MUA.
+ *
+ * @memberof dc_context_t
+ * @param context The context as created by dc_context_new().
+ * @return None.
+ */
 void            dc_perform_mvbox_fetch       (dc_context_t* context);
 
 
@@ -679,6 +689,39 @@ void            dc_perform_mvbox_idle        (dc_context_t* context);
  */
 void            dc_interrupt_mvbox_idle      (dc_context_t* context);
 
+/**
+ * Execute pending sentbox-jobs.
+ * This function and dc_perform_sentbox_fetch() and dc_perform_sentbox_idle()
+ * must be called from the same thread, typically in a loop.
+ *
+ * Example:
+ *
+ *     void* sentbox_thread_func(void* context)
+ *     {
+ *         while (true) {
+ *             dc_perform_sentbox_jobs(context);
+ *             dc_perform_sentbox_fetch(context);
+ *             dc_perform_sentbox_idle(context);
+ *         }
+ *     }
+ *
+ *     // start sentbox-thread that runs forever
+ *     pthread_t sentbox_thread;
+ *     pthread_create(&sentbox_thread, NULL, sentbox_thread_func, context);
+ *
+ *     ... program runs ...
+ *
+ *     // network becomes available again -
+ *     // the interrupt causes dc_perform_sentbox_idle() in the thread above
+ *     // to return so that jobs are executed and messages are fetched.
+ *     dc_maybe_network(context);
+ *
+ * @memberof dc_context_t
+ * @param context The context as created by dc_context_new().
+ * @return None.
+ */
+void            dc_perform_sentbox_jobs         (dc_context_t* context);
+
 
 /**
  * Fetch new messages from the Sent folder, if any.

deltachat-ffi/src/lib.rs

@@ -471,6 +471,18 @@ pub unsafe extern "C" fn dc_perform_mvbox_fetch(context: *mut dc_context_t) {
         .unwrap_or(())
 }
 
+#[no_mangle]
+pub unsafe extern "C" fn dc_perform_mvbox_jobs(context: *mut dc_context_t) {
+    if context.is_null() {
+        eprintln!("ignoring careless call to dc_perform_mvbox_jobs()");
+        return;
+    }
+    let ffi_context = &*context;
+    ffi_context
+        .with_inner(|ctx| job::perform_mvbox_jobs(ctx))
+        .unwrap_or(())
+}
+
 #[no_mangle]
 pub unsafe extern "C" fn dc_perform_mvbox_idle(context: *mut dc_context_t) {
     if context.is_null() {
@@ -507,6 +519,18 @@ pub unsafe extern "C" fn dc_perform_sentbox_fetch(context: *mut dc_context_t) {
         .unwrap_or(())
 }
 
+#[no_mangle]
+pub unsafe extern "C" fn dc_perform_sentbox_jobs(context: *mut dc_context_t) {
+    if context.is_null() {
+        eprintln!("ignoring careless call to dc_perform_sentbox_jobs()");
+        return;
+    }
+    let ffi_context = &*context;
+    ffi_context
+        .with_inner(|ctx| job::perform_sentbox_jobs(ctx))
+        .unwrap_or(())
+}
+
 #[no_mangle]
 pub unsafe extern "C" fn dc_perform_sentbox_idle(context: *mut dc_context_t) {
     if context.is_null() {