Move stream data from TCB to task group structure.

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5569 42af7a65-404d-4744-a932-0658087f49c3

23 files changed, 242 insertions, 357 deletions

diff --git a/nuttx/ChangeLog b/nuttx/ChangeLog
index ae7105b89..b5933f620 100644
--- a/nuttx/ChangeLog
+++ b/nuttx/ChangeLog
@@ -4036,3 +4036,5 @@
 	  task group IN the child task's task group.
 	* fs/, sched/, include/nuttx/sched.h, and include/nutts/fs/fs.h:
 	  Move file data from TCB to task group structure.
+	* libc/stdio/, sched/, include/nuttx/lib.h, and include/nutts/fs/fs.h:
+	  Move stream data from TCB to task group structure.
diff --git a/nuttx/arch/arm/src/common/up_exit.c b/nuttx/arch/arm/src/common/up_exit.c
index 5b469fd03..16f5c4442 100644
--- a/nuttx/arch/arm/src/common/up_exit.c
+++ b/nuttx/arch/arm/src/common/up_exit.c
@@ -75,7 +75,11 @@
 #if defined(CONFIG_DUMP_ON_EXIT) && defined(CONFIG_DEBUG)
 static void _up_dumponexit(FAR _TCB *tcb, FAR void *arg)
 {
-#if CONFIG_NFILE_DESCRIPTORS > 0 || CONFIG_NFILE_STREAMS > 0
+#if CONFIG_NFILE_DESCRIPTORS > 0
+  FAR struct filelist *filelist;
+#if CONFIG_NFILE_STREAMS > 0
+  FAR struct streamlist *streamlist;
+#endif
   int i;
 #endif
 
@@ -83,40 +87,32 @@ static void _up_dumponexit(FAR _TCB *tcb, FAR void *arg)
   sdbg("    priority=%d state=%d\n", tcb->sched_priority, tcb->task_state);
 
 #if CONFIG_NFILE_DESCRIPTORS > 0
-  if (tcb->filelist)
+  filelist = tcb->group->tg_filelist;
+  for (i = 0; i < CONFIG_NFILE_DESCRIPTORS; i++)
     {
-      FAR struct filelist *list = tcb->group->tg_filelist;
-      for (i = 0; i < CONFIG_NFILE_DESCRIPTORS; i++)
+      struct inode *inode = filelist->fl_files[i].f_inode;
+      if (inode)
         {
-          struct inode *inode = list->fl_files[i].f_inode;
-          if (inode)
-            {
-              sdbg("      fd=%d refcount=%d\n",
-                   i, inode->i_crefs);
-            }
+          sdbg("      fd=%d refcount=%d\n",
+               i, inode->i_crefs);
         }
     }
 #endif
 
 #if CONFIG_NFILE_STREAMS > 0
-  if (tcb->streams)
+  streamlist = tcb->group->tg_streamlist;
+  for (i = 0; i < CONFIG_NFILE_STREAMS; i++)
     {
-      sdbg("    streamlist refcount=%d\n",
-           tcb->streams->sl_crefs);
-
-      for (i = 0; i < CONFIG_NFILE_STREAMS; i++)
+      struct file_struct *filep = &streamlist->sl_streams[i];
+      if (filep->fs_filedes >= 0)
         {
-          struct file_struct *filep = &tcb->streams->sl_streams[i];
-          if (filep->fs_filedes >= 0)
-            {
 #if CONFIG_STDIO_BUFFER_SIZE > 0
-              sdbg("      fd=%d nbytes=%d\n",
-                   filep->fs_filedes,
-                  filep->fs_bufpos - filep->fs_bufstart);
+          sdbg("      fd=%d nbytes=%d\n",
+               filep->fs_filedes,
+               filep->fs_bufpos - filep->fs_bufstart);
 #else
-              sdbg("      fd=%d\n", filep->fs_filedes);
+          sdbg("      fd=%d\n", filep->fs_filedes);
 #endif
-            }
         }
     }
 #endif
diff --git a/nuttx/arch/avr/src/common/up_exit.c b/nuttx/arch/avr/src/common/up_exit.c
index 0813754a0..68e33fde7 100644
--- a/nuttx/arch/avr/src/common/up_exit.c
+++ b/nuttx/arch/avr/src/common/up_exit.c
@@ -75,7 +75,11 @@
 #if defined(CONFIG_DUMP_ON_EXIT) && defined(CONFIG_DEBUG)
 static void _up_dumponexit(FAR _TCB *tcb, FAR void *arg)
 {
-#if CONFIG_NFILE_DESCRIPTORS > 0 || CONFIG_NFILE_STREAMS > 0
+#if CONFIG_NFILE_DESCRIPTORS > 0
+  FAR struct filelist *filelist;
+#if CONFIG_NFILE_STREAMS > 0
+  FAR struct streamlist *streamlist;
+#endif
   int i;
 #endif
 
@@ -83,40 +87,32 @@ static void _up_dumponexit(FAR _TCB *tcb, FAR void *arg)
   sdbg("    priority=%d state=%d\n", tcb->sched_priority, tcb->task_state);
 
 #if CONFIG_NFILE_DESCRIPTORS > 0
-  if (tcb->filelist)
+  filelist = tcb->group->tg_filelist;
+  for (i = 0; i < CONFIG_NFILE_DESCRIPTORS; i++)
     {
-      FAR struct filelist *list = tcb->group->tg_filelist;
-      for (i = 0; i < CONFIG_NFILE_DESCRIPTORS; i++)
+      struct inode *inode = filelist->fl_files[i].f_inode;
+      if (inode)
         {
-          struct inode *inode = list->fl_files[i].f_inode;
-          if (inode)
-            {
-              sdbg("      fd=%d refcount=%d\n",
-                   i, inode->i_crefs);
-            }
+          sdbg("      fd=%d refcount=%d\n",
+               i, inode->i_crefs);
         }
     }
 #endif
 
 #if CONFIG_NFILE_STREAMS > 0
-  if (tcb->streams)
+  streamlist = tcb->group->tg_streamlist;
+  for (i = 0; i < CONFIG_NFILE_STREAMS; i++)
     {
-      sdbg("    streamlist refcount=%d\n",
-           tcb->streams->sl_crefs);
-
-      for (i = 0; i < CONFIG_NFILE_STREAMS; i++)
+      struct file_struct *filep = &streamlist->sl_streams[i];
+      if (filep->fs_filedes >= 0)
         {
-          struct file_struct *filep = &tcb->streams->sl_streams[i];
-          if (filep->fs_filedes >= 0)
-            {
 #if CONFIG_STDIO_BUFFER_SIZE > 0
-              sdbg("      fd=%d nbytes=%d\n",
-                   filep->fs_filedes,
-                  filep->fs_bufpos - filep->fs_bufstart);
+          sdbg("      fd=%d nbytes=%d\n",
+               filep->fs_filedes,
+               filep->fs_bufpos - filep->fs_bufstart);
 #else
-              sdbg("      fd=%d\n", filep->fs_filedes);
+          sdbg("      fd=%d\n", filep->fs_filedes);
 #endif
-            }
         }
     }
 #endif
diff --git a/nuttx/arch/hc/src/common/up_exit.c b/nuttx/arch/hc/src/common/up_exit.c
index 5313a1172..1c46875f8 100644
--- a/nuttx/arch/hc/src/common/up_exit.c
+++ b/nuttx/arch/hc/src/common/up_exit.c
@@ -75,7 +75,11 @@
 #if defined(CONFIG_DUMP_ON_EXIT) && defined(CONFIG_DEBUG)
 static void _up_dumponexit(FAR _TCB *tcb, FAR void *arg)
 {
-#if CONFIG_NFILE_DESCRIPTORS > 0 || CONFIG_NFILE_STREAMS > 0
+#if CONFIG_NFILE_DESCRIPTORS > 0
+  FAR struct filelist *filelist;
+#if CONFIG_NFILE_STREAMS > 0
+  FAR struct streamlist *streamlist;
+#endif
   int i;
 #endif
 
@@ -83,40 +87,32 @@ static void _up_dumponexit(FAR _TCB *tcb, FAR void *arg)
   sdbg("    priority=%d state=%d\n", tcb->sched_priority, tcb->task_state);
 
 #if CONFIG_NFILE_DESCRIPTORS > 0
-  if (tcb->filelist)
+  filelist = tcb->group->tg_filelist;
+  for (i = 0; i < CONFIG_NFILE_DESCRIPTORS; i++)
     {
-      FAR struct filelist *list = tcb->group->tg_filelist;
-      for (i = 0; i < CONFIG_NFILE_DESCRIPTORS; i++)
+      struct inode *inode = filelist->fl_files[i].f_inode;
+      if (inode)
         {
-          struct inode *inode = list->fl_files[i].f_inode;
-          if (inode)
-            {
-              sdbg("      fd=%d refcount=%d\n",
-                   i, inode->i_crefs);
-            }
+          sdbg("      fd=%d refcount=%d\n",
+               i, inode->i_crefs);
         }
     }
 #endif
 
 #if CONFIG_NFILE_STREAMS > 0
-  if (tcb->streams)
+  streamlist = tcb->group->tg_streamlist;
+  for (i = 0; i < CONFIG_NFILE_STREAMS; i++)
     {
-      sdbg("    streamlist refcount=%d\n",
-           tcb->streams->sl_crefs);
-
-      for (i = 0; i < CONFIG_NFILE_STREAMS; i++)
+      struct file_struct *filep = &streamlist->sl_streams[i];
+      if (filep->fs_filedes >= 0)
         {
-          struct file_struct *filep = &tcb->streams->sl_streams[i];
-          if (filep->fs_filedes >= 0)
-            {
 #if CONFIG_STDIO_BUFFER_SIZE > 0
-              sdbg("      fd=%d nbytes=%d\n",
-                   filep->fs_filedes,
-                  filep->fs_bufpos - filep->fs_bufstart);
+          sdbg("      fd=%d nbytes=%d\n",
+               filep->fs_filedes,
+               filep->fs_bufpos - filep->fs_bufstart);
 #else
-              sdbg("      fd=%d\n", filep->fs_filedes);
+          sdbg("      fd=%d\n", filep->fs_filedes);
 #endif
-            }
         }
     }
 #endif
diff --git a/nuttx/arch/mips/src/common/up_exit.c b/nuttx/arch/mips/src/common/up_exit.c
index 5a7b68a99..e112364b4 100644
--- a/nuttx/arch/mips/src/common/up_exit.c
+++ b/nuttx/arch/mips/src/common/up_exit.c
@@ -77,7 +77,11 @@
 #if defined(CONFIG_DUMP_ON_EXIT) && defined(CONFIG_DEBUG)
 static void _up_dumponexit(FAR _TCB *tcb, FAR void *arg)
 {
-#if CONFIG_NFILE_DESCRIPTORS > 0 || CONFIG_NFILE_STREAMS > 0
+#if CONFIG_NFILE_DESCRIPTORS > 0
+  FAR struct filelist *filelist;
+#if CONFIG_NFILE_STREAMS > 0
+  FAR struct streamlist *streamlist;
+#endif
   int i;
 #endif
 
@@ -85,40 +89,32 @@ static void _up_dumponexit(FAR _TCB *tcb, FAR void *arg)
   sdbg("    priority=%d state=%d\n", tcb->sched_priority, tcb->task_state);
 
 #if CONFIG_NFILE_DESCRIPTORS > 0
-  if (tcb->filelist)
+  filelist = tcb->group->tg_filelist;
+  for (i = 0; i < CONFIG_NFILE_DESCRIPTORS; i++)
     {
-      FAR struct filelist *list = tcb->group->tg_filelist;
-      for (i = 0; i < CONFIG_NFILE_DESCRIPTORS; i++)
+      struct inode *inode = filelist->fl_files[i].f_inode;
+      if (inode)
         {
-          struct inode *inode = list->fl_files[i].f_inode;
-          if (inode)
-            {
-              sdbg("      fd=%d refcount=%d\n",
-                   i, inode->i_crefs);
-            }
+          sdbg("      fd=%d refcount=%d\n",
+               i, inode->i_crefs);
         }
     }
 #endif
 
 #if CONFIG_NFILE_STREAMS > 0
-  if (tcb->streams)
+  streamlist = tcb->group->tg_streamlist;
+  for (i = 0; i < CONFIG_NFILE_STREAMS; i++)
     {
-      sdbg("    streamlist refcount=%d\n",
-           tcb->streams->sl_crefs);
-
-      for (i = 0; i < CONFIG_NFILE_STREAMS; i++)
+      struct file_struct *filep = &streamlist->sl_streams[i];
+      if (filep->fs_filedes >= 0)
         {
-          struct file_struct *filep = &tcb->streams->sl_streams[i];
-          if (filep->fs_filedes >= 0)
-            {
 #if CONFIG_STDIO_BUFFER_SIZE > 0
-              sdbg("      fd=%d nbytes=%d\n",
-                   filep->fs_filedes,
-                  filep->fs_bufpos - filep->fs_bufstart);
+          sdbg("      fd=%d nbytes=%d\n",
+               filep->fs_filedes,
+               filep->fs_bufpos - filep->fs_bufstart);
 #else
-              sdbg("      fd=%d\n", filep->fs_filedes);
+          sdbg("      fd=%d\n", filep->fs_filedes);
 #endif
-            }
         }
     }
 #endif
diff --git a/nuttx/arch/sh/src/common/up_exit.c b/nuttx/arch/sh/src/common/up_exit.c
index af270b335..705f49852 100644
--- a/nuttx/arch/sh/src/common/up_exit.c
+++ b/nuttx/arch/sh/src/common/up_exit.c
@@ -76,7 +76,11 @@
 #if defined(CONFIG_DUMP_ON_EXIT) && defined(CONFIG_DEBUG)
 static void _up_dumponexit(FAR _TCB *tcb, FAR void *arg)
 {
-#if CONFIG_NFILE_DESCRIPTORS > 0 || CONFIG_NFILE_STREAMS > 0
+#if CONFIG_NFILE_DESCRIPTORS > 0
+  FAR struct filelist *filelist;
+#if CONFIG_NFILE_STREAMS > 0
+  FAR struct streamlist *streamlist;
+#endif
   int i;
 #endif
 
@@ -84,40 +88,32 @@ static void _up_dumponexit(FAR _TCB *tcb, FAR void *arg)
   sdbg("    priority=%d state=%d\n", tcb->sched_priority, tcb->task_state);
 
 #if CONFIG_NFILE_DESCRIPTORS > 0
-  if (tcb->filelist)
+  filelist = tcb->group->tg_filelist;
+  for (i = 0; i < CONFIG_NFILE_DESCRIPTORS; i++)
     {
-      FAR struct filelist *list = tcb->group->tg_filelist;
-      for (i = 0; i < CONFIG_NFILE_DESCRIPTORS; i++)
+      struct inode *inode = filelist->fl_files[i].f_inode;
+      if (inode)
         {
-          struct inode *inode = list->fl_files[i].f_inode;
-          if (inode)
-            {
-              sdbg("      fd=%d refcount=%d\n",
-                   i, inode->i_crefs);
-            }
+          sdbg("      fd=%d refcount=%d\n",
+               i, inode->i_crefs);
         }
     }
 #endif
 
 #if CONFIG_NFILE_STREAMS > 0
-  if (tcb->streams)
+  streamlist = tcb->group->tg_streamlist;
+  for (i = 0; i < CONFIG_NFILE_STREAMS; i++)
     {
-      sdbg("    streamlist refcount=%d\n",
-           tcb->streams->sl_crefs);
-
-      for (i = 0; i < CONFIG_NFILE_STREAMS; i++)
+      struct file_struct *filep = &streamlist->sl_streams[i];
+      if (filep->fs_filedes >= 0)
         {
-          struct file_struct *filep = &tcb->streams->sl_streams[i];
-          if (filep->fs_filedes >= 0)
-            {
 #if CONFIG_STDIO_BUFFER_SIZE > 0
-              sdbg("      fd=%d nbytes=%d\n",
-                   filep->fs_filedes,
-                  filep->fs_bufpos - filep->fs_bufstart);
+          sdbg("      fd=%d nbytes=%d\n",
+               filep->fs_filedes,
+               filep->fs_bufpos - filep->fs_bufstart);
 #else
-              sdbg("      fd=%d\n", filep->fs_filedes);
+          sdbg("      fd=%d\n", filep->fs_filedes);
 #endif
-            }
         }
     }
 #endif
diff --git a/nuttx/arch/x86/src/common/up_exit.c b/nuttx/arch/x86/src/common/up_exit.c
index 6a98c7dd0..dee6f7d49 100644
--- a/nuttx/arch/x86/src/common/up_exit.c
+++ b/nuttx/arch/x86/src/common/up_exit.c
@@ -1,7 +1,7 @@
 /****************************************************************************
  * common/up_exit.c
  *
- *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2011, 2013 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -75,7 +75,11 @@
 #if defined(CONFIG_DUMP_ON_EXIT) && defined(CONFIG_DEBUG)
 static void _up_dumponexit(FAR _TCB *tcb, FAR void *arg)
 {
-#if CONFIG_NFILE_DESCRIPTORS > 0 || CONFIG_NFILE_STREAMS > 0
+#if CONFIG_NFILE_DESCRIPTORS > 0
+  FAR struct filelist *filelist;
+#if CONFIG_NFILE_STREAMS > 0
+  FAR struct streamlist *streamlist;
+#endif
   int i;
 #endif
 
@@ -83,40 +87,32 @@ static void _up_dumponexit(FAR _TCB *tcb, FAR void *arg)
   sdbg("    priority=%d state=%d\n", tcb->sched_priority, tcb->task_state);
 
 #if CONFIG_NFILE_DESCRIPTORS > 0
-  if (tcb->filelist)
+  filelist = tcb->group->tg_filelist;
+  for (i = 0; i < CONFIG_NFILE_DESCRIPTORS; i++)
     {
-      FAR struct filelist *list = tcb->group->tg_filelist;
-      for (i = 0; i < CONFIG_NFILE_DESCRIPTORS; i++)
+      struct inode *inode = filelist->fl_files[i].f_inode;
+      if (inode)
         {
-          struct inode *inode = list->fl_files[i].f_inode;
-          if (inode)
-            {
-              sdbg("      fd=%d refcount=%d\n",
-                   i, inode->i_crefs);
-            }
+          sdbg("      fd=%d refcount=%d\n",
+               i, inode->i_crefs);
         }
     }
 #endif
 
 #if CONFIG_NFILE_STREAMS > 0
-  if (tcb->streams)
+  streamlist = tcb->group->tg_streamlist;
+  for (i = 0; i < CONFIG_NFILE_STREAMS; i++)
     {
-      sdbg("    streamlist refcount=%d\n",
-           tcb->streams->sl_crefs);
-
-      for (i = 0; i < CONFIG_NFILE_STREAMS; i++)
+      struct file_struct *filep = &streamlist->sl_streams[i];
+      if (filep->fs_filedes >= 0)
         {
-          struct file_struct *filep = &tcb->streams->sl_streams[i];
-          if (filep->fs_filedes >= 0)
-            {
 #if CONFIG_STDIO_BUFFER_SIZE > 0
-              sdbg("      fd=%d nbytes=%d\n",
-                   filep->fs_filedes,
-                  filep->fs_bufpos - filep->fs_bufstart);
+          sdbg("      fd=%d nbytes=%d\n",
+               filep->fs_filedes,
+               filep->fs_bufpos - filep->fs_bufstart);
 #else
-              sdbg("      fd=%d\n", filep->fs_filedes);
+          sdbg("      fd=%d\n", filep->fs_filedes);
 #endif
-            }
         }
     }
 #endif
diff --git a/nuttx/arch/z16/src/common/up_exit.c b/nuttx/arch/z16/src/common/up_exit.c
index ad0c55eed..20b808360 100644
--- a/nuttx/arch/z16/src/common/up_exit.c
+++ b/nuttx/arch/z16/src/common/up_exit.c
@@ -77,7 +77,11 @@
 #if defined(CONFIG_DUMP_ON_EXIT) && defined(CONFIG_DEBUG)
 static void _up_dumponexit(FAR _TCB *tcb, FAR void *arg)
 {
-#if CONFIG_NFILE_DESCRIPTORS > 0 || CONFIG_NFILE_STREAMS > 0
+#if CONFIG_NFILE_DESCRIPTORS > 0
+  FAR struct filelist *filelist;
+#if CONFIG_NFILE_STREAMS > 0
+  FAR struct streamlist *streamlist;
+#endif
   int i;
 #endif
 
@@ -85,40 +89,32 @@ static void _up_dumponexit(FAR _TCB *tcb, FAR void *arg)
   lldbg("    priority=%d state=%d\n", tcb->sched_priority, tcb->task_state);
 
 #if CONFIG_NFILE_DESCRIPTORS > 0
-  if (tcb->filelist)
+  filelist = tcb->group->tg_filelist;
+  for (i = 0; i < CONFIG_NFILE_DESCRIPTORS; i++)
     {
-      FAR struct filelist *list = tcb->group->tg_filelist;
-      for (i = 0; i < CONFIG_NFILE_DESCRIPTORS; i++)
+      struct inode *inode = filelist->fl_files[i].f_inode;
+      if (inode)
         {
-          struct inode *inode = list->fl_files[i].f_inode;
-          if (inode)
-            {
-              lldbg("      fd=%d refcount=%d\n",
-                    i, inode->i_crefs);
-            }
+          lldbg("      fd=%d refcount=%d\n",
+                i, inode->i_crefs);
         }
     }
 #endif
 
 #if CONFIG_NFILE_STREAMS > 0
-  if (tcb->streams)
+  streamlist = tcb->group->tg_streamlist;
+  for (i = 0; i < CONFIG_NFILE_STREAMS; i++)
     {
-      lldbg("    streamlist refcount=%d\n",
-            tcb->streams->sl_crefs);
-
-      for (i = 0; i < CONFIG_NFILE_STREAMS; i++)
+      struct file_struct *filep = &streamlist->sl_streams[i];
+      if (filep->fs_filedes >= 0)
         {
-          struct file_struct *filep = &tcb->streams->sl_streams[i];
-          if (filep->fs_filedes >= 0)
-            {
 #if CONFIG_STDIO_BUFFER_SIZE > 0
-              lldbg("      fd=%d nbytes=%d\n",
-                    filep->fs_filedes,
-                    filep->fs_bufpos - filep->fs_bufstart);
+          lldbg("      fd=%d nbytes=%d\n",
+                filep->fs_filedes,
+                filep->fs_bufpos - filep->fs_bufstart);
 #else
-              lldbg("      fd=%d\n", filep->fs_filedes);
+          lldbg("      fd=%d\n", filep->fs_filedes);
 #endif
-            }
         }
     }
 #endif
diff --git a/nuttx/arch/z80/src/common/up_exit.c b/nuttx/arch/z80/src/common/up_exit.c
index 50289f52b..603a0bfbe 100644
--- a/nuttx/arch/z80/src/common/up_exit.c
+++ b/nuttx/arch/z80/src/common/up_exit.c
@@ -1,7 +1,7 @@
 /****************************************************************************
  * common/up_exit.c
  *
- *   Copyright (C) 2007-2009 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2007-2009, 2013 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -78,7 +78,11 @@
 #if defined(CONFIG_DUMP_ON_EXIT) && defined(CONFIG_DEBUG)
 static void _up_dumponexit(FAR _TCB *tcb, FAR void *arg)
 {
-#if CONFIG_NFILE_DESCRIPTORS > 0 || CONFIG_NFILE_STREAMS > 0
+#if CONFIG_NFILE_DESCRIPTORS > 0
+  FAR struct filelist *filelist;
+#if CONFIG_NFILE_STREAMS > 0
+  FAR struct streamlist *streamlist;
+#endif
   int i;
 #endif
 
@@ -86,40 +90,32 @@ static void _up_dumponexit(FAR _TCB *tcb, FAR void *arg)
   lldbg("    priority=%d state=%d\n", tcb->sched_priority, tcb->task_state);
 
 #if CONFIG_NFILE_DESCRIPTORS > 0
-  if (tcb->filelist)
+  filelist = tcb->group->tg_filelist;
+  for (i = 0; i < CONFIG_NFILE_DESCRIPTORS; i++)
     {
-      FAR struct filelist *list = tcb->group->tg_filelist;
-      for (i = 0; i < CONFIG_NFILE_DESCRIPTORS; i++)
+      struct inode *inode = filelist->fl_files[i].f_inode;
+      if (inode)
         {
-          struct inode *inode = list->fl_files[i].f_inode;
-          if (inode)
-            {
-              lldbg("      fd=%d refcount=%d\n",
-                    i, inode->i_crefs);
-            }
+          lldbg("      fd=%d refcount=%d\n",
+                i, inode->i_crefs);
         }
     }
 #endif
 
 #if CONFIG_NFILE_STREAMS > 0
-  if (tcb->streams)
+  streamlist = tcb->group->tg_streamlist;
+  for (i = 0; i < CONFIG_NFILE_STREAMS; i++)
     {
-      lldbg("    streamlist refcount=%d\n",
-            tcb->streams->sl_crefs);
-
-      for (i = 0; i < CONFIG_NFILE_STREAMS; i++)
+      struct file_struct *filep = &streamlist->sl_streams[i];
+      if (filep->fs_filedes >= 0)
         {
-          struct file_struct *filep = &tcb->streams->sl_streams[i];
-          if (filep->fs_filedes >= 0)
-            {
 #if CONFIG_STDIO_BUFFER_SIZE > 0
-              lldbg("      fd=%d nbytes=%d\n",
-                    filep->fs_filedes,
-                    filep->fs_bufpos - filep->fs_bufstart);
+          lldbg("      fd=%d nbytes=%d\n",
+                filep->fs_filedes,
+                filep->fs_bufpos - filep->fs_bufstart);
 #else
-              lldbg("      fd=%d\n", filep->fs_filedes);
+          lldbg("      fd=%d\n", filep->fs_filedes);
 #endif
-            }
         }
     }
 #endif
diff --git a/nuttx/fs/fs_fdopen.c b/nuttx/fs/fs_fdopen.c
index 629083c77..d8a370482 100644
--- a/nuttx/fs/fs_fdopen.c
+++ b/nuttx/fs/fs_fdopen.c
@@ -144,6 +144,7 @@ FAR struct file_struct *fs_fdopen(int fd, int oflags, FAR _TCB *tcb)
     {
       tcb = sched_self();
     }
+  DEBUGASSERT(tcb && tcb->group);
 
   /* Verify that this is a valid file/socket descriptor and that the
    * requested access can be support.
@@ -191,9 +192,9 @@ FAR struct file_struct *fs_fdopen(int fd, int oflags, FAR _TCB *tcb)
 
   /* Get the stream list from the TCB */
 
-  slist = tcb->streams;
+  slist = &tcb->group->tg_streamlist;
 
-  /* Find an unallocated FILE structure  in the stream list */
+  /* Find an unallocated FILE structure in the stream list */
 
   ret = sem_wait(&slist->sl_sem);
   if (ret != OK)
diff --git a/nuttx/include/nuttx/fs/fs.h b/nuttx/include/nuttx/fs/fs.h
index 02855460c..93ca2a334 100644
--- a/nuttx/include/nuttx/fs/fs.h
+++ b/nuttx/include/nuttx/fs/fs.h
@@ -293,7 +293,6 @@ struct file_struct
 
 struct streamlist
 {
-  int                 sl_crefs; /* Reference count */
   sem_t               sl_sem;   /* For thread safety */
   struct file_struct sl_streams[CONFIG_NFILE_STREAMS];
 };
diff --git a/nuttx/include/nuttx/lib.h b/nuttx/include/nuttx/lib.h
index 220af2030..3bc581e18 100644
--- a/nuttx/include/nuttx/lib.h
+++ b/nuttx/include/nuttx/lib.h
@@ -2,7 +2,7 @@
  * include/nuttx/lib.h
  * Non-standard, internal APIs available in lib/.
  *
- *   Copyright (C) 2007-2009, 2012 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2007-2009, 2012-2013 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -67,11 +67,10 @@ extern "C" {
 
 /* Functions contained in lib_init.c ****************************************/
 
-EXTERN void weak_function     lib_initialize(void);
+void weak_function lib_initialize(void);
 #if CONFIG_NFILE_STREAMS > 0
-EXTERN FAR struct streamlist *lib_alloclist(void);
-EXTERN void                   lib_addreflist(FAR struct streamlist *list);
-EXTERN void                   lib_releaselist(FAR struct streamlist *list);
+void lib_streaminit(FAR struct streamlist *list);
+void lib_releaselist(FAR struct streamlist *list);
 #endif
 
 #undef EXTERN
diff --git a/nuttx/include/nuttx/sched.h b/nuttx/include/nuttx/sched.h
index 1580a80d3..a084d50ba 100644
--- a/nuttx/include/nuttx/sched.h
+++ b/nuttx/include/nuttx/sched.h
@@ -81,6 +81,8 @@
 #    define HAVE_TASK_GROUP   1
 #  elif CONFIG_NFILE_DESCRIPTORS > 0
 #    define HAVE_TASK_GROUP   1
+#  elif CONFIG_NFILE_STREAMS > 0
+#    define HAVE_TASK_GROUP   1
 #  endif
 #endif
 
@@ -303,7 +305,10 @@ struct task_group_s
 #endif
 
   /* FILE streams ***************************************************************/
-  /* Not yet (see streamlist) */
+
+#if CONFIG_NFILE_STREAMS > 0
+  struct streamlist tg_streamlist;  /* Holds C buffered I/O info                */
+#endif /* CONFIG_NFILE_STREAMS */
 
   /* Sockets ********************************************************************/
   /* Not yet (see struct socketlist) */
@@ -445,12 +450,6 @@ struct _TCB
 
   int        pterrno;                    /* Current per-thread errno            */
 
-  /* File system support ********************************************************/
-
-#if CONFIG_NFILE_STREAMS > 0
-  FAR struct streamlist *streams;        /* Holds C buffered I/O info           */
-#endif
-
   /* Network socket *************************************************************/
 
 #if CONFIG_NSOCKET_DESCRIPTORS > 0
diff --git a/nuttx/libc/misc/lib_init.c b/nuttx/libc/misc/lib_init.c
index 6a120f7b1..434c46505 100644
--- a/nuttx/libc/misc/lib_init.c
+++ b/nuttx/libc/misc/lib_init.c
@@ -1,7 +1,7 @@
 /************************************************************
  * libc/misc/lib_init.c
  *
- *   Copyright (C) 2007, 2011 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2007, 2011, 2013 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -76,69 +76,35 @@ void weak_const_function lib_initialize(void)
 }
 
 #if CONFIG_NFILE_STREAMS > 0
-/* The following function is called when a new TCB is allocated.  It
- * creates the streamlist instance that is stored in the TCB.
+/* The following function is called when a new task is allocated.  It
+ * intializes the streamlist instance that is stored in the task group.
  */
 
-FAR struct streamlist *lib_alloclist(void)
+void lib_streaminit(FAR struct streamlist *list)
 {
-  FAR struct streamlist *list;
-  list = (FAR struct streamlist*)lib_zalloc(sizeof(struct streamlist));
-  if (list)
-    {
-      int i;
-
-      /* Start with a reference count of one */
-
-      list->sl_crefs = 1;
+  int i;
 
-      /* Initialize the list access mutex */
+  /* Initialize the list access mutex */
 
-      (void)sem_init(&list->sl_sem, 0, 1);
+  (void)sem_init(&list->sl_sem, 0, 1);
 
-      /* Initialize each FILE structure */
+  /* Initialize each FILE structure */
 
-      for (i = 0; i < CONFIG_NFILE_STREAMS; i++)
-       {
-         /* Clear the IOB */
+  for (i = 0; i < CONFIG_NFILE_STREAMS; i++)
+   {
+     /* Clear the IOB */
 
-          memset(&list->sl_streams[i], 0, sizeof(FILE));
+      memset(&list->sl_streams[i], 0, sizeof(FILE));
 
-          /* Indicate not opened */
+      /* Indicate not opened */
 
-          list->sl_streams[i].fs_filedes = -1;
+      list->sl_streams[i].fs_filedes = -1;
 
-          /* Initialize the stream semaphore to one to support one-at-
-           * a-time access to private data sets.
-           */
-
-          lib_sem_initialize(&list->sl_streams[i]);
-        }
-    }
-  return list;
+      /* Initialize the stream semaphore to one to support one-at-
+       * a-time access to private data sets.
+       */
 
-}
-
-/* This function is called when a TCB is closed (such as with
- * pthread_create().  It increases the reference count on the stream
- * list.
- */
-
-void lib_addreflist(FAR struct streamlist *list)
-{
-  if (list)
-    {
-       /* Increment the reference count on the list.
-        * NOTE: that we disable interrupts to do this
-        * (vs. taking the list semaphore).  We do this
-        * because file cleanup operations often must be
-        * done from the IDLE task which cannot wait
-        * on semaphores.
-        */
-
-       register irqstate_t flags = irqsave();
-       list->sl_crefs++;
-       irqrestore(flags);
+      lib_sem_initialize(&list->sl_streams[i]);
     }
 }
 
@@ -149,57 +115,33 @@ void lib_addreflist(FAR struct streamlist *list)
 
 void lib_releaselist(FAR struct streamlist *list)
 {
-  int crefs;
-  if (list)
-    {
-       /* Decrement the reference count on the list.
-        * NOTE: that we disable interrupts to do this
-        * (vs. taking the list semaphore).  We do this
-        * because file cleanup operations often must be
-        * done from the IDLE task which cannot wait
-        * on semaphores.
-        */
-
-       register irqstate_t flags = irqsave();
-       crefs = --(list->sl_crefs);
-       irqrestore(flags);
-
-       /* If the count decrements to zero, then there is no reference
-        * to the structure and it should be deallocated.  Since there
-        * are references, it would be an error if any task still held
-        * a reference to the list's semaphore.
-        */
-
-       if (crefs <= 0)
-          {
 #if CONFIG_STDIO_BUFFER_SIZE > 0
-            int i;
+  int i;
 #endif
-            /* Destroy the semaphore and release the filelist */
 
-            (void)sem_destroy(&list->sl_sem);
+  DEBUGASSERT(list);
+
+  /* Destroy the semaphore and release the filelist */
 
-            /* Release each stream in the list */
+  (void)sem_destroy(&list->sl_sem);
+
+  /* Release each stream in the list */
 
 #if CONFIG_STDIO_BUFFER_SIZE > 0
-            for (i = 0; i < CONFIG_NFILE_STREAMS; i++)
-             {
-               /* Destroy the semaphore that protects the IO buffer */
-
-               (void)sem_destroy(&list->sl_streams[i].fs_sem);
-
-               /* Release the IO buffer */
-               if (list->sl_streams[i].fs_bufstart)
-                 {
-                   sched_free(list->sl_streams[i].fs_bufstart);
-                 }
-             }
-#endif
-           /* Finally, release the list itself */
+  for (i = 0; i < CONFIG_NFILE_STREAMS; i++)
+    {
+      /* Destroy the semaphore that protects the IO buffer */
 
-            sched_free(list);
-         }
-     }
+      (void)sem_destroy(&list->sl_streams[i].fs_sem);
+
+      /* Release the IO buffer */
+
+      if (list->sl_streams[i].fs_bufstart)
+        {
+          sched_free(list->sl_streams[i].fs_bufstart);
+        }
+    }
+#endif
 }
 
 #endif /* CONFIG_NFILE_STREAMS */
diff --git a/nuttx/libc/stdio/lib_libflushall.c b/nuttx/libc/stdio/lib_libflushall.c
index 7ac3da7e0..22baed968 100644
--- a/nuttx/libc/stdio/lib_libflushall.c
+++ b/nuttx/libc/stdio/lib_libflushall.c
@@ -1,7 +1,7 @@
 /****************************************************************************
  * libc/stdio/lib_libflushall.c
  *
- *   Copyright (C) 2007-2009, 2011-2012 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2007-2009, 2011-2013 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/nuttx/sched/group_internal.h b/nuttx/sched/group_internal.h
index 39d0a2b7c..e6e0dfd16 100644
--- a/nuttx/sched/group_internal.h
+++ b/nuttx/sched/group_internal.h
@@ -86,28 +86,11 @@ void group_leave(FAR _TCB *tcb);
 FAR struct task_group_s *group_find(gid_t gid);
 int group_addmember(FAR struct task_group_s *group, pid_t pid);
 int  group_removemember(FAR struct task_group_s *group, pid_t pid);
-#else
-#  define group_find(gid)               (NULL)
-#  define group_addmember(group,pid)    (0)
-#  define group_removemember(group,pid) (1)
 #endif
 
 #ifndef CONFIG_DISABLE_SIGNALS
 int  group_signal(FAR struct task_group_s *group, FAR siginfo_t *info);
-#else
-#  define group_signal(tcb,info)        (0)
 #endif
-
-#else
-#  define group_allocate(tcb)           (0)
-#  define group_initialize(tcb)         (0)
-#  define group_bind(tcb)               (0)
-#  define group_join(tcb)               (0)
-#  define group_leave(tcb)
-#  define group_find(gid)               (NULL)
-#  define group_addmember(group,pid)    (0)
-#  define group_removemember(group,pid) (1)
-#  define group_signal(tcb,info)        (0)
 #endif /* HAVE_TASK_GROUP */
 
 /* Parent/child data management */
@@ -127,15 +110,13 @@ FAR struct child_status_s *group_removechild(FAR struct task_group_s *group,
                                              pid_t pid);
 void group_removechildren(FAR struct task_group_s *group);
 
+#endif /* CONFIG_SCHED_CHILD_STATUS */
+#endif /* CONFIG_SCHED_HAVE_PARENT */
+
 /* File/network resources */
 
 #if CONFIG_NFILE_DESCRIPTORS > 0 || CONFIG_NSOCKET_DESCRIPTORS > 0
-int  group_releasefiles(FAR _TCB *tcb);
-#else
-# define group_releasefiles(t)          (OK)
+int group_releasefiles(FAR _TCB *tcb);
 #endif
 
-#endif /* CONFIG_SCHED_CHILD_STATUS */
-#endif /* CONFIG_SCHED_HAVE_PARENT */
-
 #endif /* __SCHED_GROUP_INERNAL_H */
diff --git a/nuttx/sched/group_leave.c b/nuttx/sched/group_leave.c
index 158ba30b5..70ef93666 100644
--- a/nuttx/sched/group_leave.c
+++ b/nuttx/sched/group_leave.c
@@ -165,6 +165,7 @@ static inline void group_release(FAR _TCB *tcb,
   env_release(tcb);
 #endif
 
+#ifdef HAVE_GROUP_MEMBERS
   /* Remove the group from the list of groups */
 
   group_remove(group);
@@ -176,6 +177,7 @@ static inline void group_release(FAR _TCB *tcb,
       sched_free(group->tg_members);
       group->tg_members = NULL;
     }
+#endif
 
   /* Release the group container itself */
 
diff --git a/nuttx/sched/group_releasefiles.c b/nuttx/sched/group_releasefiles.c
index 40bf373b4..b33415c76 100644
--- a/nuttx/sched/group_releasefiles.c
+++ b/nuttx/sched/group_releasefiles.c
@@ -80,7 +80,9 @@ int group_releasefiles(_TCB *tcb)
 #if CONFIG_NFILE_DESCRIPTORS > 0
       FAR struct task_group_s *group = tcb->group;
       DEBUGASSERT(group);
+#endif
 
+#if CONFIG_NFILE_DESCRIPTORS > 0
       /* Free resources used by the file descriptor list */
 
       files_releaselist(&group->tg_filelist);
@@ -88,11 +90,8 @@ int group_releasefiles(_TCB *tcb)
 #if CONFIG_NFILE_STREAMS > 0
       /* Free the stream list */
 
-      if (tcb->streams)
-        {
-          lib_releaselist(tcb->streams);
-          tcb->streams = NULL;
-        }
+      lib_releaselist(&group->tg_streamlist);
+
 #endif /* CONFIG_NFILE_STREAMS */
 #endif /* CONFIG_NFILE_DESCRIPTORS */
 
diff --git a/nuttx/sched/sched_getfiles.c b/nuttx/sched/sched_getfiles.c
index eca4ba3ff..17ca2bbf6 100644
--- a/nuttx/sched/sched_getfiles.c
+++ b/nuttx/sched/sched_getfiles.c
@@ -1,7 +1,7 @@
 /************************************************************************
  * sched/sched_getfiles.c
  *
- *   Copyright (C) 2007, 2009 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2007, 2009, 2013 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/nuttx/sched/sched_getstreams.c b/nuttx/sched/sched_getstreams.c
index f7c21ab4c..dab406e66 100644
--- a/nuttx/sched/sched_getstreams.c
+++ b/nuttx/sched/sched_getstreams.c
@@ -1,7 +1,7 @@
 /****************************************************************************
  * sched/sched_getstreams.c
  *
- *   Copyright (C) 2007, 2008 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2007, 2008, 2013 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -70,7 +70,10 @@
 FAR struct streamlist *sched_getstreams(void)
 {
   FAR _TCB *rtcb = (FAR _TCB*)g_readytorun.head;
-  return rtcb->streams;
+  FAR struct task_group_s *group = rtcb->group;
+
+  DEBUGASSERT(group);
+  return &group->tg_streamlist;
 } 
 
 #endif /* CONFIG_NFILE_DESCRIPTORS && CONFIG_NFILE_STREAMS */
diff --git a/nuttx/sched/sched_setuppthreadfiles.c b/nuttx/sched/sched_setuppthreadfiles.c
index 78d6cbfec..91d72fa7f 100644
--- a/nuttx/sched/sched_setuppthreadfiles.c
+++ b/nuttx/sched/sched_setuppthreadfiles.c
@@ -77,8 +77,6 @@
 
 int sched_setuppthreadfiles(FAR _TCB *tcb)
 {
-  FAR _TCB *rtcb = (FAR _TCB*)g_readytorun.head;
-
 #if CONFIG_NSOCKET_DESCRIPTORS > 0
   /* The child thread inherits the parent socket descriptors */
 
@@ -87,13 +85,6 @@ int sched_setuppthreadfiles(FAR _TCB *tcb)
 
 #endif /* CONFIG_NSOCKET_DESCRIPTORS */
 
-#if CONFIG_NFILE_STREAMS > 0
-  /* The child thread inherits the parent streams */
-
-  tcb->streams = rtcb->streams;
-  lib_addreflist(tcb->streams);
-
-#endif /* CONFIG_NFILE_STREAMS */
   return OK;
 }
 
diff --git a/nuttx/sched/sched_setupstreams.c b/nuttx/sched/sched_setupstreams.c
index 22895b047..fb2e4d0be 100644
--- a/nuttx/sched/sched_setupstreams.c
+++ b/nuttx/sched/sched_setupstreams.c
@@ -72,24 +72,23 @@
 
 int sched_setupstreams(FAR _TCB *tcb)
 {
-  /* Allocate file streams for the TCB */
-
-  tcb->streams = lib_alloclist();
-  if (tcb->streams)
-    {
-      /* fdopen to get the stdin, stdout and stderr streams.
-       * The following logic depends on the fact that the library
-       * layer will allocate FILEs in order.
-       *
-       * fd = 0 is stdin  (read-only)
-       * fd = 1 is stdout (write-only, append)
-       * fd = 2 is stderr (write-only, append)
-       */
-
-      (void)fs_fdopen(0, O_RDONLY,       tcb);
-      (void)fs_fdopen(1, O_WROK|O_CREAT, tcb);
-      (void)fs_fdopen(2, O_WROK|O_CREAT, tcb);
-    }
+  DEBUGASSERT(tcb && tcb->group);
+
+  /* Initialize file streams for the task group */
+
+  lib_streaminit(&tcb->group->tg_streamlist);
+
+  /* fdopen to get the stdin, stdout and stderr streams. The following logic
+   * depends on the fact that the library layer will allocate FILEs in order.
+   *
+   * fd = 0 is stdin  (read-only)
+   * fd = 1 is stdout (write-only, append)
+   * fd = 2 is stderr (write-only, append)
+   */
+
+  (void)fs_fdopen(0, O_RDONLY,       tcb);
+  (void)fs_fdopen(1, O_WROK|O_CREAT, tcb);
+  (void)fs_fdopen(2, O_WROK|O_CREAT, tcb);
 
   return OK;
 }
diff --git a/nuttx/sched/task_exithook.c b/nuttx/sched/task_exithook.c
index 5a2b9e57e..889df25e0 100644
--- a/nuttx/sched/task_exithook.c
+++ b/nuttx/sched/task_exithook.c
@@ -543,7 +543,7 @@ void task_exithook(FAR _TCB *tcb, int status)
    */
 
 #if CONFIG_NFILE_STREAMS > 0
-  (void)lib_flushall(tcb->streams);
+  (void)lib_flushall(&tcb->group->tg_streamlist);
 #endif
 
   /* Leave the task group.  Perhaps discarding any un-reaped child