(mh_scan0): Implemented EVT_MESSAGE_ADD notification.

@@ -58,7 +58,7 @@
 #include <mailutils/property.h>
 #include <mailutils/property.h>
 #include <mailutils/stream.h>
 #include <mailutils/stream.h>
 #include <mailutils/url.h>
 #include <mailutils/url.h>
-
+#include <mailutils/observer.h>
 #include <mailbox0.h>
 #include <mailbox0.h>
 #include <registrar0.h>
 #include <registrar0.h>
 
 
@@ -67,6 +67,24 @@
 #define MH_ENV_SENDER_HEADER "X-Envelope-Sender"
 #define MH_ENV_SENDER_HEADER "X-Envelope-Sender"
 #define MH_ENV_DATE_HEADER "X-Envelope-Date"
 #define MH_ENV_DATE_HEADER "X-Envelope-Date"
 
 
+/* Notifications ADD_MESG. */
+#define DISPATCH_ADD_MSG(mbox,mhd) \
+do \
+{ \
+  int bailing = 0; \
+  monitor_unlock (mbox->monitor); \
+  if (mbox->observable) \
+     bailing = observable_notify (mbox->observable, MU_EVT_MESSAGE_ADD); \
+  if (bailing != 0) \
+    { \
+      if (pcount) \
+        *pcount = (mhd)->msg_count; \
+      locker_unlock (mbox->locker); \
+      return EINTR; \
+    } \
+  monitor_wrlock (mbox->monitor); \
+} while (0);
+
 /* Note: In this particular implementation the message sequence number
 /* Note: In this particular implementation the message sequence number
    serves also as its UID. This allows to avoid many problems related
    serves also as its UID. This allows to avoid many problems related
    to keeping the uids in the headers of the messages. */
    to keeping the uids in the headers of the messages. */
@@ -128,7 +146,8 @@ static int mh_save_attributes __P ((mailbox_t));
 static int mh_uidvalidity __P ((mailbox_t, unsigned long *));
 static int mh_uidvalidity __P ((mailbox_t, unsigned long *));
 static int mh_uidnext __P ((mailbox_t, size_t *));
 static int mh_uidnext __P ((mailbox_t, size_t *));
 static int mh_scan __P ((mailbox_t, size_t, size_t *));
 static int mh_scan __P ((mailbox_t, size_t, size_t *));
-static int mh_scan0 __P ((mailbox_t mailbox, size_t msgno, size_t *pcount));
+static int mh_scan0 __P ((mailbox_t mailbox, size_t msgno, size_t *pcount,
+			  int do_notify));
 static int mh_is_updated __P ((mailbox_t));
 static int mh_is_updated __P ((mailbox_t));
 static int mh_get_size __P ((mailbox_t, off_t *));
 static int mh_get_size __P ((mailbox_t, off_t *));
 
 
@@ -441,7 +460,7 @@ mh_get_message (mailbox_t mailbox, size_t msgno, message_t *pmsg)
   /* If we did not start a scanning yet do it now.  */
   /* If we did not start a scanning yet do it now.  */
   if (mhd->msg_count == 0)
   if (mhd->msg_count == 0)
     {
     {
-      status = mh_scan0 (mailbox, 1, NULL);
+      status = mh_scan0 (mailbox, 1, NULL, 0);
       if (status != 0)
       if (status != 0)
 	return status;
 	return status;
     }
     }
@@ -609,7 +628,7 @@ mh_append_message (mailbox_t mailbox, message_t msg)
   /* If we did not start a scanning yet do it now.  */
   /* If we did not start a scanning yet do it now.  */
   if (mhd->msg_count == 0)
   if (mhd->msg_count == 0)
     {
     {
-      status = mh_scan0 (mailbox, 1, NULL);
+      status = mh_scan0 (mailbox, 1, NULL, 0);
       if (status != 0)
       if (status != 0)
 	return status;
 	return status;
     }
     }
@@ -633,7 +652,7 @@ mh_messages_count (mailbox_t mailbox, size_t *pcount)
     return EINVAL;
     return EINVAL;
 
 
   if (!mh_is_updated (mailbox))
   if (!mh_is_updated (mailbox))
-    return mh_scan0 (mailbox,  mhd->msg_count, pcount);
+    return mh_scan0 (mailbox,  mhd->msg_count, pcount, 0);
 
 
   if (pcount)
   if (pcount)
     *pcount = mhd->msg_count;
     *pcount = mhd->msg_count;
@@ -654,7 +673,7 @@ mh_messages_recent (mailbox_t mailbox, size_t *pcount)
   /* If we did not start a scanning yet do it now.  */
   /* If we did not start a scanning yet do it now.  */
   if (mhd->msg_count == 0)
   if (mhd->msg_count == 0)
     {
     {
-      int status = mh_scan0 (mailbox, 1, NULL);
+      int status = mh_scan0 (mailbox, 1, NULL, 0);
       if (status != 0)
       if (status != 0)
 	return status;
 	return status;
     }
     }
@@ -679,7 +698,7 @@ mh_message_unseen (mailbox_t mailbox, size_t *pmsgno)
   /* If we did not start a scanning yet do it now.  */
   /* If we did not start a scanning yet do it now.  */
   if (mhd->msg_count == 0)
   if (mhd->msg_count == 0)
     {
     {
-      int status = mh_scan0 (mailbox, 1, NULL);
+      int status = mh_scan0 (mailbox, 1, NULL, 0);
       if (status != 0)
       if (status != 0)
 	return status;
 	return status;
     }
     }
@@ -767,7 +786,7 @@ mh_uidvalidity (mailbox_t mailbox, unsigned long *puidvalidity)
   /* If we did not start a scanning yet do it now.  */
   /* If we did not start a scanning yet do it now.  */
   if (mhd->msg_count == 0)
   if (mhd->msg_count == 0)
     {
     {
-      status = mh_scan0 (mailbox, 1, NULL);
+      status = mh_scan0 (mailbox, 1, NULL, 0);
       if (status != 0)
       if (status != 0)
 	return status;
 	return status;
     }
     }
@@ -786,7 +805,7 @@ mh_uidnext (mailbox_t mailbox, size_t *puidnext)
   /* If we did not start a scanning yet do it now.  */
   /* If we did not start a scanning yet do it now.  */
   if (mhd->msg_count == 0)
   if (mhd->msg_count == 0)
     {
     {
-      status = mh_scan0 (mailbox, 1, NULL);
+      status = mh_scan0 (mailbox, 1, NULL, 0);
       if (status != 0)
       if (status != 0)
 	return status;
 	return status;
     }
     }
@@ -933,7 +952,7 @@ mh_scan_message (struct _mh_message *mhm)
 
 
 /* Scan the mailbox */
 /* Scan the mailbox */
 static int
 static int
-mh_scan0 (mailbox_t mailbox, size_t msgno, size_t *pcount)
+mh_scan0 (mailbox_t mailbox, size_t msgno, size_t *pcount, int do_notify)
 {
 {
   struct _mh_data *mhd = mailbox->data;
   struct _mh_data *mhd = mailbox->data;
   DIR *dir;
   DIR *dir;
@@ -1005,6 +1024,10 @@ mh_scan0 (mailbox_t mailbox, size_t msgno, size_t *pcount)
 	  /* This scans the message */
 	  /* This scans the message */
 	  mh_message_stream_open (msg);
 	  mh_message_stream_open (msg);
 	  mh_message_stream_close (msg);
 	  mh_message_stream_close (msg);
+
+	  /* Notify */
+	  if (do_notify)
+	    DISPATCH_ADD_MSG(mailbox, mhd);
 	}
 	}
       else
       else
 	{
 	{
@@ -1049,7 +1072,7 @@ mh_scan (mailbox_t mailbox, size_t msgno, size_t *pcount)
   struct _mh_data *mhd = mailbox->data;
   struct _mh_data *mhd = mailbox->data;
 
 
   if (! mh_is_updated (mailbox))
   if (! mh_is_updated (mailbox))
-    return mh_scan0 (mailbox, msgno, pcount);
+    return mh_scan0 (mailbox, msgno, pcount, 1);
 
 
   if (pcount)
   if (pcount)
     *pcount = mhd->msg_count;
     *pcount = mhd->msg_count;