From 6ca5765eb63e1cb0374489607b255feeca8e2ba7 Mon Sep 17 00:00:00 2001
From: Dan Williams <dcbw@redhat.com>
Date: Fri, 19 Mar 2010 10:54:10 -0700
Subject: core: add chaining helper functions to callback info

Helpful when chaining a number of commands together when you want
to schedule the callback info only after all of them complete.
---
 src/mm-callback-info.c | 23 +++++++++++++++++++++++
 src/mm-callback-info.h |  6 ++++++
 2 files changed, 29 insertions(+)

(limited to 'src')

diff --git a/src/mm-callback-info.c b/src/mm-callback-info.c
index 1882898a..1986bb55 100644
--- a/src/mm-callback-info.c
+++ b/src/mm-callback-info.c
@@ -91,6 +91,8 @@ mm_callback_info_schedule (MMCallbackInfo *info)
     g_return_if_fail (info->pending_id == 0);
     g_return_if_fail (info->called == FALSE);
 
+    g_warn_if_fail (info->chain_left == 0);
+
     info->pending_id = g_idle_add_full (G_PRIORITY_DEFAULT_IDLE, callback_info_do, info, callback_info_done);
 }
 
@@ -208,3 +210,24 @@ mm_callback_info_unref (MMCallbackInfo *info)
     }
 }
 
+void
+mm_callback_info_chain_start (MMCallbackInfo *info, guint num)
+{
+    g_return_if_fail (info != NULL);
+    g_return_if_fail (num > 0);
+    g_return_if_fail (info->chain_left == 0);
+
+    info->chain_left = num;
+}
+
+void
+mm_callback_info_chain_complete_one (MMCallbackInfo *info)
+{
+    g_return_if_fail (info != NULL);
+    g_return_if_fail (info->chain_left > 0);
+
+    info->chain_left--;
+    if (info->chain_left == 0)
+        mm_callback_info_schedule (info);
+}
+
diff --git a/src/mm-callback-info.h b/src/mm-callback-info.h
index 66c20487..ef4d65fc 100644
--- a/src/mm-callback-info.h
+++ b/src/mm-callback-info.h
@@ -25,6 +25,9 @@ typedef void (*MMCallbackInfoInvokeFn) (MMCallbackInfo *info);
 struct _MMCallbackInfo {
     guint32 refcount;
 
+    /* # of ops left in this callback chain */
+    guint32 chain_left;
+
     GData *qdata;
     MMModem *modem;
 
@@ -70,5 +73,8 @@ gpointer        mm_callback_info_get_data (MMCallbackInfo *info,
 MMCallbackInfo *mm_callback_info_ref (MMCallbackInfo *info);
 void            mm_callback_info_unref (MMCallbackInfo *info);
 
+void            mm_callback_info_chain_start (MMCallbackInfo *info, guint num);
+void            mm_callback_info_chain_complete_one (MMCallbackInfo *info);
+
 #endif /* MM_CALLBACK_INFO_H */
 
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