errno was clobbered by mm_trysemaphore when task exists

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@591 42af7a65-404d-4744-a932-0658087f49c3

2 files changed, 18 insertions, 18 deletions

diff --git a/nuttx/include/nuttx/arch.h b/nuttx/include/nuttx/arch.h
index 3eef7b15d..2c83f1f2a 100644
--- a/nuttx/include/nuttx/arch.h
+++ b/nuttx/include/nuttx/arch.h
@@ -1,5 +1,5 @@
 /****************************************************************************
- * arch.h
+ * nuttx/arch.h
  *
  *   Copyright (C) 2007, 2008 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
@@ -53,12 +53,12 @@
  * Public Types
  ****************************************************************************/
 
+typedef CODE void (*sig_deliver_t)(FAR _TCB *tcb);
+
 /****************************************************************************
  * Public Variables
  ****************************************************************************/
 
-typedef CODE void (*sig_deliver_t)(FAR _TCB *tcb);
-
 /****************************************************************************
  * Public Function Prototypes
  ****************************************************************************/
@@ -291,12 +291,13 @@ EXTERN void up_reprioritize_rtr(FAR _TCB *tcb, ubyte priority);
  *
  * Description:
  *   This function causes the currently executing task to cease
- *   to exist.  This is a special case of task_delete().
+ *   to exist.  This is a special case of task_delete() where the task to
+ *   be deleted is the currently executing task.  It is more complex because
+ *   a context switch must be perform to the the next ready to run task.
  *
- *   Unlike other UP APIs, this function may be called
- *   directly from user programs in various states.  The
- *   implementation of this function should diable interrupts
- *   before performing scheduling operations.
+ *   Unlike other UP APIs, this function may be called directly from user
+ *   programs in various states.  The implementation of this function should
+ *   disable interrupts before performing scheduling operations.
  *
  ****************************************************************************/
 /* Prototype is in unistd.h */
@@ -448,8 +449,7 @@ EXTERN void up_mdelay(unsigned int milliseconds);
 EXTERN void up_udelay(unsigned int microseconds);
 
 /****************************************************************************
- * Debug interfaces exported by the architecture-specific
- * logic
+ * Debug interfaces exported by the architecture-specific logic
  ****************************************************************************/
 
 /****************************************************************************
diff --git a/nuttx/include/nuttx/sched.h b/nuttx/include/nuttx/sched.h
index 7386979c8..4548b3365 100644
--- a/nuttx/include/nuttx/sched.h
+++ b/nuttx/include/nuttx/sched.h
@@ -1,5 +1,5 @@
 /********************************************************************************
- * sched.h
+ * nuttx/sched.h
  *
  *   Copyright (C) 2007, 2008 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
@@ -83,22 +83,22 @@
 
 enum tstate_e
 {
-  TSTATE_TASK_INVALID    = 0, /* INVALID - TCB has not yet been initialized */
-
+  TSTATE_TASK_INVALID    = 0, /* INVALID     - The TCB is is not in a valid state
+                               *               (Uninitialized or between context switches) */
   TSTATE_TASK_PENDING    = 1, /* READY_TO_RUN - Pending preemption unlock */
   TSTATE_TASK_READYTORUN = 2, /* READY-TO-RUN - But not running */
   TSTATE_TASK_RUNNING    = 3, /* READY_TO_RUN - And running */
 
-  TSTATE_TASK_INACTIVE   = 4, /* BLOCKED - Initialized but not yet activated */
-  TSTATE_WAIT_SEM        = 5  /* BLOCKED - Waiting for a semaphore */
+  TSTATE_TASK_INACTIVE   = 4, /* BLOCKED      - Initialized but not yet activated */
+  TSTATE_WAIT_SEM        = 5  /* BLOCKED      - Waiting for a semaphore */
 #ifndef CONFIG_DISABLE_SIGNALS
   ,
-  TSTATE_WAIT_SIG        = 6  /* BLOCKED - Waiting for a signal */
+  TSTATE_WAIT_SIG        = 6  /* BLOCKED      - Waiting for a signal */
 #endif
 #ifndef CONFIG_DISABLE_MQUEUE
   ,
-  TSTATE_WAIT_MQNOTEMPTY,     /* BLOCKED - Waiting for a MQ to become not empty. */
-  TSTATE_WAIT_MQNOTFULL       /* BLOCKED - Waiting for a MQ to become not full. */
+  TSTATE_WAIT_MQNOTEMPTY,     /* BLOCKED      - Waiting for a MQ to become not empty. */
+  TSTATE_WAIT_MQNOTFULL       /* BLOCKED      - Waiting for a MQ to become not full. */
 #endif
 };
 typedef enum tstate_e tstate_t;