From a4f7c437b828b67da222e971c54e855b4dd67be5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?IOhannes=20m=20zm=C3=B6lnig?=
 <zmoelnig@users.sourceforge.net>
Date: Mon, 29 Mar 2010 14:10:22 +0000
Subject: provide feedback to Pd main-thread whether sender-thread still exists

svn path=/trunk/externals/iem/iemnet/; revision=13300
---
 iemnet.c    | 16 +++++++++++++---
 tcpserver.c |  7 ++++++-
 2 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/iemnet.c b/iemnet.c
index 1d44144..46b8332 100644
--- a/iemnet.c
+++ b/iemnet.c
@@ -373,6 +373,7 @@ struct _iemnet_sender {
   int sockfd; /* owned outside; must call iemnet__sender_destroy() before freeing socket yourself */
   t_queue*queue;
   int keepsending; // indicates whether we want to thread to continue or to terminate
+  int isrunning;
 };
 
 /* the workhorse of the family */
@@ -384,9 +385,15 @@ static int iemnet__sender_dosend(int sockfd, t_queue*q) {
     unsigned int size=c->size;
     int result=-1;
     //    fprintf(stderr, "sending %d bytes at %x to %d\n", size, data, sockfd);
-
+    DEBUG("sending %d bytes", size);
     result = send(sockfd, data, size, 0);
+    if(result<0) {
+      // broken pipe
+      return 0;
+    }
+
     // shouldn't we do something with the result here?
+    DEBUG("sent %d bytes", result);
     iemnet__chunk_destroy(c);
   } else {
     return 0;
@@ -403,13 +410,15 @@ static void*iemnet__sender_sendthread(void*arg) {
   while(sender->keepsending) {
     if(!iemnet__sender_dosend(sockfd, q))break;
   }
-  //fprintf(stderr, "write thread terminated\n");
+  sender->isrunning=0;
+  DEBUG("send thread terminated");
   return NULL;
 }
 
 int iemnet__sender_send(t_iemnet_sender*s, t_iemnet_chunk*c) {
   t_queue*q=s->queue;
-  int size=0;
+  int size=-1;
+  if(!s->isrunning)return -1;
   if(q) {
     t_iemnet_chunk*chunk=iemnet__chunk_create_chunk(c);
     size = queue_push(q, chunk);
@@ -448,6 +457,7 @@ t_iemnet_sender*iemnet__sender_create(int sock) {
   result->queue = queue_create();
   result->sockfd = sock;
   result->keepsending =1;
+  result->isrunning=1;
 
   res=pthread_create(&result->thread, 0, iemnet__sender_sendthread, result);
 
diff --git a/tcpserver.c b/tcpserver.c
index 8a5673b..fc2cd0f 100644
--- a/tcpserver.c
+++ b/tcpserver.c
@@ -148,7 +148,7 @@ static int tcpserver_fixindex(t_tcpserver*x, int client)
 }
 
 /* ---------------- main tcpserver (send) stuff --------------------- */
-
+static void tcpserver_disconnect_socket(t_tcpserver *x, t_floatarg fsocket);
 static void tcpserver_send_bytes(t_tcpserver*x, int client, t_iemnet_chunk*chunk)
 {
   if(x && x->x_sr && x->x_sr[client]) {
@@ -166,6 +166,11 @@ static void tcpserver_send_bytes(t_tcpserver*x, int client, t_iemnet_chunk*chunk
     SETFLOAT(&output_atom[1], size);
     SETFLOAT(&output_atom[2], sockfd);
     outlet_anything( x->x_status_outlet, gensym("sent"), 3, output_atom);
+
+    if(size<0) {
+      // disconnected!
+      tcpserver_disconnect_socket(x, sockfd);
+    }
   }
 }
 
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