From 6c3538618668b4ac8aec21d9476a148c6d90200e Mon Sep 17 00:00:00 2001
From: richardbarry <richardbarry@1d2547de-c912-0410-9cb9-b8ca96c0e9e2>
Date: Thu, 23 Sep 2010 18:07:41 +0000
Subject: [PATCH] Update to FreeRTOS V6.1.0 release candidate.

git-svn-id: https://svn.code.sf.net/p/freertos/code/trunk@1135 1d2547de-c912-0410-9cb9-b8ca96c0e9e2
---
 Source/tasks.c | 43 ++++++++++++++++++++++++++++++++++---------
 1 file changed, 34 insertions(+), 9 deletions(-)

diff --git a/Source/tasks.c b/Source/tasks.c
index fafd9ceb7..7b7d64136 100644
--- a/Source/tasks.c
+++ b/Source/tasks.c
@@ -460,15 +460,19 @@ tskTCB * pxNewTCB;
 		portENTER_CRITICAL();
 		{
 			uxCurrentNumberOfTasks++;
-			if( uxCurrentNumberOfTasks == ( unsigned portBASE_TYPE ) 1 )
+			if( pxCurrentTCB == NULL )
 			{
-				/* As this is the first task it must also be the current task. */
+				/* There are no other tasks, or all the other tasks are in
+				the suspended state - make this the current task. */
 				pxCurrentTCB =  pxNewTCB;
 
-				/* This is the first task to be created so do the preliminary
-				initialisation required.  We will not recover if this call
-				fails, but we will report the failure. */
-				prvInitialiseTaskLists();
+				if( uxCurrentNumberOfTasks == ( unsigned portBASE_TYPE ) 1 )
+				{
+					/* This is the first task to be created so do the preliminary
+					initialisation required.  We will not recover if this call
+					fails, but we will report the failure. */
+					prvInitialiseTaskLists();
+				}
 			}
 			else
 			{
@@ -893,10 +897,31 @@ tskTCB * pxNewTCB;
 		}
 		portEXIT_CRITICAL();
 
-		/* We may have just suspended the current task. */
-		if( ( ( void * ) pxTaskToSuspend == NULL ) && ( xSchedulerRunning != pdFALSE ) )
+		if( ( void * ) pxTaskToSuspend == NULL )
 		{
-			portYIELD_WITHIN_API();
+			if( xSchedulerRunning != pdFALSE )
+			{
+				/* We have just suspended the current task. */
+				portYIELD_WITHIN_API();
+			}
+			else
+			{
+				/* The scheduler is not running, but the task that was pointed
+				to by pxCurrentTCB has just been suspended and pxCurrentTCB
+				must be adjusted to point to a different task. */
+				if( uxCurrentNumberOfTasks == 1 )
+				{
+					/* No other tasks are defined, so set pxCurrentTCB back to
+					NULL so when the next task is created pxCurrentTCB will
+					be set to point to it no matter what its relative priority
+					is. */
+					pxCurrentTCB = NULL;
+				}
+				else
+				{
+					vTaskSwitchContext();
+				}
+			}
 		}
 	}
 
-- 
2.39.5