This commit renames all internal OS functions defined under sched/task so that they begin with the prefix. For example, nxtask_exit() vs. task_exit().

Squashed commit of the following:

    Trivial, cosmetic
    sched/, arch/, and include:  Rename task_vforkstart() as nxtask_vforkstart()
    sched/, arch/, and include:  Rename task_vforkabort() as nxtask_vforkabort()
    sched/, arch/, and include:  Rename task_vforksetup() as nxtask_vfork_setup()
    sched/:  Rename notify_cancellation() as nxnotify_cancellation()
    sched/:  Rename task_recover() to nxtask_recover()
    sched/task, sched/pthread/, Documentation/:  Rename task_argsetup() and task_terminate() to nxtask_argsetup() and nxtask_terminate(), respectively.
    sched/task:  Rename task_schedsetup() to nxtask_schedsetup()
    sched/ (plus some binfmt/, include/, and arch/):  Rename task_start() and task_starthook() to nxtask_start() and nxtask_starthook().
    arch/ and sched/:  Rename task_exit() and task_exithook() to nxtask_exit() and nxtask_exithook(), respectively.
    sched/task:  Rename all internal, static, functions to begin with the nx prefix.

Documentation/NuttxUserGuide.html

@@ -479,7 +479,7 @@ int task_delete(pid_t pid);
   Its  stack and TCB will be deallocated.
   This function is the companion to <code>task_create()</code>.
   This is the version of the function exposed to the user;
-  it is simply a wrapper around the internal, <code>task_terminate()</code> function.
+  it is simply a wrapper around the internal, <code>nxtask_terminate()</code> function.
 </p>
 <p>
   The logic in this function only deletes non-running tasks.

arch/arm/src/arm/vfork.S

@@ -71,8 +71,8 @@
  *
  *   1) User code calls vfork().  vfork() collects context information and
  *      transfers control up up_vfork().
- *   2) up_vfork()and calls task_vforksetup().
+ *   2) up_vfork()and calls nxtask_vforksetup().
- *   3) task_vforksetup() allocates and configures the child task's TCB.  This
+ *   3) nxtask_vforksetup() allocates and configures the child task's TCB.  This
  *      consists of:
  *      - Allocation of the child task's TCB.
  *      - Initialization of file descriptors and streams
@@ -83,8 +83,8 @@
  *      - Allocate and initialize the stack
  *      - Initialize special values in any CPU registers that were not
  *        already configured by up_initial_state()
- *   5) up_vfork() then calls task_vforkstart()
+ *   5) up_vfork() then calls nxtask_vforkstart()
- *   6) task_vforkstart() then executes the child thread.
+ *   6) nxtask_vforkstart() then executes the child thread.
  *
  * Input Parameters:
  *   None

arch/arm/src/armv6-m/vfork.S

@@ -72,8 +72,8 @@
  *
  *   1) User code calls vfork().  vfork() collects context information and
  *      transfers control up up_vfork().
- *   2) up_vfork()and calls task_vforksetup().
+ *   2) up_vfork()and calls nxtask_vforksetup().
- *   3) task_vforksetup() allocates and configures the child task's TCB.  This
+ *   3) nxtask_vforksetup() allocates and configures the child task's TCB.  This
  *      consists of:
  *      - Allocation of the child task's TCB.
  *      - Initialization of file descriptors and streams
@@ -84,8 +84,8 @@
  *      - Allocate and initialize the stack
  *      - Initialize special values in any CPU registers that were not
  *        already configured by up_initial_state()
- *   5) up_vfork() then calls task_vforkstart()
+ *   5) up_vfork() then calls nxtask_vforkstart()
- *   6) task_vforkstart() then executes the child thread.
+ *   6) nxtask_vforkstart() then executes the child thread.
  *
  * Input Parameters:
  *   None

arch/arm/src/armv7-a/arm_initialstate.c

@@ -101,7 +101,7 @@ void up_initial_state(struct tcb_s *tcb)
   /* Set supervisor-mode and disable FIQs, regardless of how NuttX is
    * configured and of what kind of thread is being started.  That is
    * because all threads, even user-mode threads will start in kernel
-   * trampoline at task_start() or pthread_start().  The thread's
+   * trampoline at nxtask_start() or pthread_start().  The thread's
    * privileges will be dropped before transitioning to user code.
    */
 

arch/arm/src/armv7-a/arm_vfork.S

@@ -73,8 +73,8 @@
  *
  *   1) User code calls vfork().  vfork() collects context information and
  *      transfers control up up_vfork().
- *   2) up_vfork()and calls task_vforksetup().
+ *   2) up_vfork()and calls nxtask_vforksetup().
- *   3) task_vforksetup() allocates and configures the child task's TCB.
+ *   3) nxtask_vforksetup() allocates and configures the child task's TCB.
  *      This consists of:
  *      - Allocation of the child task's TCB.
  *      - Initialization of file descriptors and streams
@@ -85,8 +85,8 @@
  *      - Allocate and initialize the stack
  *      - Initialize special values in any CPU registers that were not
  *        already configured by up_initial_state()
- *   5) up_vfork() then calls task_vforkstart()
+ *   5) up_vfork() then calls nxtask_vforkstart()
- *   6) task_vforkstart() then executes the child thread.
+ *   6) nxtask_vforkstart() then executes the child thread.
  *
  * Input Parameters:
  *   None

arch/arm/src/armv7-m/gnu/vfork.S

@@ -73,8 +73,8 @@
  *
  *   1) User code calls vfork().  vfork() collects context information and
  *      transfers control up up_vfork().
- *   2) up_vfork()and calls task_vforksetup().
+ *   2) up_vfork()and calls nxtask_vforksetup().
- *   3) task_vforksetup() allocates and configures the child task's TCB.  This
+ *   3) nxtask_vforksetup() allocates and configures the child task's TCB.  This
  *      consists of:
  *      - Allocation of the child task's TCB.
  *      - Initialization of file descriptors and streams
@@ -85,8 +85,8 @@
  *      - Allocate and initialize the stack
  *      - Initialize special values in any CPU registers that were not
  *        already configured by up_initial_state()
- *   5) up_vfork() then calls task_vforkstart()
+ *   5) up_vfork() then calls nxtask_vforkstart()
- *   6) task_vforkstart() then executes the child thread.
+ *   6) nxtask_vforkstart() then executes the child thread.
  *
  * Input Parameters:
  *   None

arch/arm/src/armv7-m/iar/vfork.S

@@ -74,8 +74,8 @@
  *
  *   1) User code calls vfork().  vfork() collects context information and
  *      transfers control up up_vfork().
- *   2) up_vfork()and calls task_vforksetup().
+ *   2) up_vfork()and calls nxtask_vforksetup().
- *   3) task_vforksetup() allocates and configures the child task's TCB.  This
+ *   3) nxtask_vforksetup() allocates and configures the child task's TCB.  This
  *      consists of:
  *      - Allocation of the child task's TCB.
  *      - Initialization of file descriptors and streams
@@ -86,8 +86,8 @@
  *      - Allocate and initialize the stack
  *      - Initialize special values in any CPU registers that were not
  *        already configured by up_initial_state()
- *   5) up_vfork() then calls task_vforkstart()
+ *   5) up_vfork() then calls nxtask_vforkstart()
- *   6) task_vforkstart() then executes the child thread.
+ *   6) nxtask_vforkstart() then executes the child thread.
  *
  * Input Parameters:
  *   None

arch/arm/src/armv7-r/arm_initialstate.c

@@ -113,7 +113,7 @@ void up_initial_state(struct tcb_s *tcb)
   /* Set supervisor-mode and disable FIQs, regardless of how NuttX is
    * configured and of what kind of thread is being started.  That is
    * because all threads, even user-mode threads will start in kernel
-   * trampoline at task_start() or pthread_start().  The thread's
+   * trampoline at nxtask_start() or pthread_start().  The thread's
    * privileges will be dropped before transitioning to user code.
    */
 

arch/arm/src/armv7-r/arm_vfork.S

@@ -73,8 +73,8 @@
  *
  *   1) User code calls vfork().  vfork() collects context information and
  *      transfers control up up_vfork().
- *   2) up_vfork()and calls task_vforksetup().
+ *   2) up_vfork()and calls nxtask_vforksetup().
- *   3) task_vforksetup() allocates and configures the child task's TCB.
+ *   3) nxtask_vforksetup() allocates and configures the child task's TCB.
  *      This consists of:
  *      - Allocation of the child task's TCB.
  *      - Initialization of file descriptors and streams
@@ -85,8 +85,8 @@
  *      - Allocate and initialize the stack
  *      - Initialize special values in any CPU registers that were not
  *        already configured by up_initial_state()
- *   5) up_vfork() then calls task_vforkstart()
+ *   5) up_vfork() then calls nxtask_vforkstart()
- *   6) task_vforkstart() then executes the child thread.
+ *   6) nxtask_vforkstart() then executes the child thread.
  *
  * Input Parameters:
  *   None

arch/arm/src/common/up_exit.c

@@ -167,7 +167,7 @@ void _exit(int status)
 
   /* Destroy the task at the head of the ready to run list. */
 
-  (void)task_exit();
+  (void)nxtask_exit();
 
   /* Now, perform the context switch to the new ready-to-run task at the
    * head of the list.

arch/arm/src/common/up_vfork.c

@@ -81,8 +81,8 @@
  *
  *   1) User code calls vfork().  vfork() collects context information and
  *      transfers control up up_vfork().
- *   2) up_vfork()and calls task_vforksetup().
+ *   2) up_vfork()and calls nxtask_vforksetup().
- *   3) task_vforksetup() allocates and configures the child task's TCB.  This
+ *   3) nxtask_vforksetup() allocates and configures the child task's TCB.  This
  *      consists of:
  *      - Allocation of the child task's TCB.
  *      - Initialization of file descriptors and streams
@@ -93,10 +93,10 @@
  *      - Allocate and initialize the stack
  *      - Initialize special values in any CPU registers that were not
  *        already configured by up_initial_state()
- *   5) up_vfork() then calls task_vforkstart()
+ *   5) up_vfork() then calls nxtask_vforkstart()
- *   6) task_vforkstart() then executes the child thread.
+ *   6) nxtask_vforkstart() then executes the child thread.
  *
- * task_vforkabort() may be called if an error occurs between steps 3 and 6.
+ * nxtask_vforkabort() may be called if an error occurs between steps 3 and 6.
  *
  * Input Parameters:
  *   context - Caller context information saved by vfork()
@@ -131,10 +131,10 @@ pid_t up_vfork(const struct vfork_s *context)
 
   /* Allocate and initialize a TCB for the child task. */
 
-  child = task_vforksetup((start_t)(context->lr & ~1), &argsize);
+  child = nxtask_vforksetup((start_t)(context->lr & ~1), &argsize);
   if (!child)
     {
-      serr("ERROR: task_vforksetup failed\n");
+      serr("ERROR: nxtask_vforksetup failed\n");
       return (pid_t)ERROR;
     }
 
@@ -154,7 +154,7 @@ pid_t up_vfork(const struct vfork_s *context)
   if (ret != OK)
     {
       serr("ERROR: up_create_stack failed: %d\n", ret);
-      task_vforkabort(child, -ret);
+      nxtask_vforkabort(child, -ret);
       return (pid_t)ERROR;
     }
 
@@ -266,9 +266,9 @@ pid_t up_vfork(const struct vfork_s *context)
     }
 #endif
 
-  /* And, finally, start the child task.  On a failure, task_vforkstart()
+  /* And, finally, start the child task.  On a failure, nxtask_vforkstart()
-   * will discard the TCB by calling task_vforkabort().
+   * will discard the TCB by calling nxtask_vforkabort().
    */
 
-  return task_vforkstart(child);
+  return nxtask_vforkstart(child);
 }

arch/avr/src/common/up_exit.c

@@ -166,7 +166,7 @@ void _exit(int status)
 
   /* Destroy the task at the head of the ready to run list. */
 
-  (void)task_exit();
+  (void)nxtask_exit();
 
   /* Now, perform the context switch to the new ready-to-run task at the
    * head of the list.

arch/hc/src/common/up_exit.c

@@ -166,7 +166,7 @@ void _exit(int status)
 
   /* Destroy the task at the head of the ready to run list. */
 
-  (void)task_exit();
+  (void)nxtask_exit();
 
   /* Now, perform the context switch to the new ready-to-run task at the
    * head of the list.

arch/mips/src/common/up_exit.c

@@ -168,7 +168,7 @@ void _exit(int status)
 
   /* Destroy the task at the head of the ready to run list. */
 
-  (void)task_exit();
+  (void)nxtask_exit();
 
   /* Now, perform the context switch to the new ready-to-run task at the
    * head of the list.

arch/mips/src/mips32/up_vfork.c

@@ -83,8 +83,8 @@
  *
  *   1) User code calls vfork().  vfork() collects context information and
  *      transfers control up up_vfork().
- *   2) up_vfork()and calls task_vforksetup().
+ *   2) up_vfork()and calls nxtask_vforksetup().
- *   3) task_vforksetup() allocates and configures the child task's TCB.  This
+ *   3) nxtask_vforksetup() allocates and configures the child task's TCB.  This
  *      consists of:
  *      - Allocation of the child task's TCB.
  *      - Initialization of file descriptors and streams
@@ -95,10 +95,10 @@
  *      - Allocate and initialize the stack
  *      - Initialize special values in any CPU registers that were not
  *        already configured by up_initial_state()
- *   5) up_vfork() then calls task_vforkstart()
+ *   5) up_vfork() then calls nxtask_vforkstart()
- *   6) task_vforkstart() then executes the child thread.
+ *   6) nxtask_vforkstart() then executes the child thread.
  *
- * task_vforkabort() may be called if an error occurs between steps 3 and 6.
+ * nxtask_vforkabort() may be called if an error occurs between steps 3 and 6.
  *
  * Input Parameters:
  *   context - Caller context information saved by vfork()
@@ -151,10 +151,10 @@ pid_t up_vfork(const struct vfork_s *context)
 
   /* Allocate and initialize a TCB for the child task. */
 
-  child = task_vforksetup((start_t)context->ra, &argsize);
+  child = nxtask_vforksetup((start_t)context->ra, &argsize);
   if (!child)
     {
-      sinfo("task_vforksetup failed\n");
+      sinfo("nxtask_vforksetup failed\n");
       return (pid_t)ERROR;
     }
 
@@ -174,7 +174,7 @@ pid_t up_vfork(const struct vfork_s *context)
   if (ret != OK)
     {
       serr("ERROR: up_create_stack failed: %d\n", ret);
-      task_vforkabort(child, -ret);
+      nxtask_vforkabort(child, -ret);
       return (pid_t)ERROR;
     }
 
@@ -254,9 +254,9 @@ pid_t up_vfork(const struct vfork_s *context)
   child->cmn.xcp.regs[REG_GP]  = newsp;        /* Global pointer */
 #endif
 
-  /* And, finally, start the child task.  On a failure, task_vforkstart()
+  /* And, finally, start the child task.  On a failure, nxtask_vforkstart()
-   * will discard the TCB by calling task_vforkabort().
+   * will discard the TCB by calling nxtask_vforkabort().
    */
 
-  return task_vforkstart(child);
+  return nxtask_vforkstart(child);
 }

arch/mips/src/mips32/vfork.S

@@ -71,8 +71,8 @@
  *
  *   1) User code calls vfork().  vfork() collects context information and
  *      transfers control up up_vfork().
- *   2) up_vfork()and calls task_vforksetup().
+ *   2) up_vfork()and calls nxtask_vforksetup().
- *   3) task_vforksetup() allocates and configures the child task's TCB.  This
+ *   3) nxtask_vforksetup() allocates and configures the child task's TCB.  This
  *      consists of:
  *      - Allocation of the child task's TCB.
  *      - Initialization of file descriptors and streams
@@ -83,8 +83,8 @@
  *      - Allocate and initialize the stack
  *      - Initialize special values in any CPU registers that were not
  *        already configured by up_initial_state()
- *   5) up_vfork() then calls task_vforkstart()
+ *   5) up_vfork() then calls nxtask_vforkstart()
- *   6) task_vforkstart() then executes the child thread.
+ *   6) nxtask_vforkstart() then executes the child thread.
  *
  * Input Parameters:
  *   None

arch/misoc/src/lm32/lm32_exit.c

@@ -161,7 +161,7 @@ void _exit(int status)
 
   /* Destroy the task at the head of the ready to run list. */
 
-  (void)task_exit();
+  (void)nxtask_exit();
 
   /* Now, perform the context switch to the new ready-to-run task at the
    * head of the list.

arch/or1k/src/common/up_exit.c

@@ -166,7 +166,7 @@ void _exit(int status)
 
   /* Destroy the task at the head of the ready to run list. */
 
-  (void)task_exit();
+  (void)nxtask_exit();
 
   /* Now, perform the context switch to the new ready-to-run task at the
    * head of the list.

arch/renesas/src/common/up_exit.c

@@ -166,7 +166,7 @@ void _exit(int status)
 
   /* Destroy the task at the head of the ready to run list. */
 
-  (void)task_exit();
+  (void)nxtask_exit();
 
   /* Now, perform the context switch to the new ready-to-run task at the
    * head of the list.

arch/risc-v/src/common/up_exit.c

@@ -168,7 +168,7 @@ void _exit(int status)
 
   /* Destroy the task at the head of the ready to run list. */
 
-  (void)task_exit();
+  (void)nxtask_exit();
 
   /* Now, perform the context switch to the new ready-to-run task at the
    * head of the list.

arch/risc-v/src/rv32im/up_vfork.c

@@ -83,8 +83,8 @@
  *
  *   1) User code calls vfork().  vfork() collects context information and
  *      transfers control up up_vfork().
- *   2) up_vfork()and calls task_vforksetup().
+ *   2) up_vfork()and calls nxtask_vforksetup().
- *   3) task_vforksetup() allocates and configures the child task's TCB.  This
+ *   3) nxtask_vforksetup() allocates and configures the child task's TCB.  This
  *      consists of:
  *      - Allocation of the child task's TCB.
  *      - Initialization of file descriptors and streams
@@ -95,10 +95,10 @@
  *      - Allocate and initialize the stack
  *      - Initialize special values in any CPU registers that were not
  *        already configured by up_initial_state()
- *   5) up_vfork() then calls task_vforkstart()
+ *   5) up_vfork() then calls nxtask_vforkstart()
- *   6) task_vforkstart() then executes the child thread.
+ *   6) nxtask_vforkstart() then executes the child thread.
  *
- * task_vforkabort() may be called if an error occurs between steps 3 and 6.
+ * nxtask_vforkabort() may be called if an error occurs between steps 3 and 6.
  *
  * Input Parameters:
  *   context - Caller context information saved by vfork()
@@ -155,10 +155,10 @@ pid_t up_vfork(const struct vfork_s *context)
 
   /* Allocate and initialize a TCB for the child task. */
 
-  child = task_vforksetup((start_t)context->ra, &argsize);
+  child = nxtask_vforksetup((start_t)context->ra, &argsize);
   if (!child)
     {
-      sinfo("task_vforksetup failed\n");
+      sinfo("nxtask_vforksetup failed\n");
       return (pid_t)ERROR;
     }
 
@@ -178,7 +178,7 @@ pid_t up_vfork(const struct vfork_s *context)
   if (ret != OK)
     {
       serr("ERROR: up_create_stack failed: %d\n", ret);
-      task_vforkabort(child, -ret);
+      nxtask_vforkabort(child, -ret);
       return (pid_t)ERROR;
     }
 
@@ -258,11 +258,11 @@ pid_t up_vfork(const struct vfork_s *context)
   child->cmn.xcp.regs[REG_GP]  = newsp;        /* Global pointer */
 #endif
 
-  /* And, finally, start the child task.  On a failure, task_vforkstart()
+  /* And, finally, start the child task.  On a failure, nxtask_vforkstart()
-   * will discard the TCB by calling task_vforkabort().
+   * will discard the TCB by calling nxtask_vforkabort().
    */
 
-  return task_vforkstart(child);
+  return nxtask_vforkstart(child);
 }
 
 #endif /* CONFIG_ARCH_HAVE_VFORK */

arch/sim/src/up_exit.c

@@ -75,7 +75,7 @@ void _exit(int status)
 
   /* Destroy the task at the head of the ready to run list. */
 
-  (void)task_exit();
+  (void)nxtask_exit();
 
   /* Now, perform the context switch to the new ready-to-run task at the
    * head of the list.

arch/x86/src/common/up_exit.c

@@ -166,7 +166,7 @@ void _exit(int status)
 
   /* Destroy the task at the head of the ready to run list. */
 
-  (void)task_exit();
+  (void)nxtask_exit();
 
   /* Now, perform the context switch to the new ready-to-run task at the
    * head of the list.

arch/xtensa/src/common/xtensa_exit.c

@@ -173,7 +173,7 @@ void _exit(int status)
 
   /* Destroy the task at the head of the ready to run list. */
 
-  (void)task_exit();
+  (void)nxtask_exit();
 
   /* Now, perform the context switch to the new ready-to-run task at the
    * head of the list.

arch/z16/src/common/up_exit.c

@@ -166,7 +166,7 @@ void _exit(int status)
 
   /* Destroy the task at the head of the ready to run list. */
 
-  (void)task_exit();
+  (void)nxtask_exit();
 
   /* Now, perform the context switch to the new ready-to-run task at the
    * head of the list.

arch/z80/src/common/up_exit.c

@@ -168,7 +168,7 @@ void _exit(int status)
 
   /* Destroy the task at the head of the ready to run list. */
 
-  (void)task_exit();
+  (void)nxtask_exit();
 
   /* Now, perform the context switch to the new ready-to-run task at the
    * head of the list.

binfmt/binfmt_execmodule.c

@@ -257,7 +257,7 @@ int exec_module(FAR const struct binary_s *binp)
 
   if (binp->nctors > 0)
     {
-      task_starthook(tcb, exec_ctors, (FAR void *)binp);
+      nxtask_starthook(tcb, exec_ctors, (FAR void *)binp);
     }
 #endif
 

configs/sabre-6quad/README.txt

@@ -128,7 +128,7 @@ Status
   until sched_resume_scheduler() runs.  These commits were made:
 
     commit 50ab5d638a37b539775d1e60085f182bf26be57f
-      sched/task:  It is not appropriate for logic in task_exit() to call
+      sched/task:  It is not appropriate for logic in nxtask_exit() to call
       the new version of this_task().  sched/irq:  Remove redundant fetch
       of CPU index; configs/sabre-6quad: update README.
 

include/nuttx/sched.h

@@ -875,7 +875,7 @@ FAR struct socketlist *sched_getsockets(void);
 #endif /* CONFIG_NSOCKET_DESCRIPTORS */
 
 /********************************************************************************
- * Name: task_starthook
+ * Name: nxtask_starthook
  *
  * Description:
  *   Configure a start hook... a function that will be called on the thread
@@ -894,7 +894,7 @@ FAR struct socketlist *sched_getsockets(void);
  ********************************************************************************/
 
 #ifdef CONFIG_SCHED_STARTHOOK
-void task_starthook(FAR struct task_tcb_s *tcb, starthook_t starthook,
+void nxtask_starthook(FAR struct task_tcb_s *tcb, starthook_t starthook,
                       FAR void *arg);
 #endif
 
@@ -903,8 +903,8 @@ void task_starthook(FAR struct task_tcb_s *tcb, starthook_t starthook,
  *
  * 1) User code calls vfork().  vfork() is provided in architecture-specific
  *    code.
- * 2) vfork()and calls task_vforksetup().
+ * 2) vfork()and calls nxtask_vforksetup().
- * 3) task_vforksetup() allocates and configures the child task's TCB.  This
+ * 3) nxtask_vforksetup() allocates and configures the child task's TCB.  This
  *    consists of:
  *    - Allocation of the child task's TCB.
  *    - Initialization of file descriptors and streams
@@ -915,16 +915,16 @@ void task_starthook(FAR struct task_tcb_s *tcb, starthook_t starthook,
  *    - Allocate and initialize the stack
  *    - Initialize special values in any CPU registers that were not
  *      already configured by up_initial_state()
- * 5) vfork() then calls task_vforkstart()
+ * 5) vfork() then calls nxtask_vforkstart()
- * 6) task_vforkstart() then executes the child thread.
+ * 6) nxtask_vforkstart() then executes the child thread.
  *
- * task_vforkabort() may be called if an error occurs between steps 3 and 6.
+ * nxtask_vforkabort() may be called if an error occurs between steps 3 and 6.
  *
  ********************************************************************************/
 
-FAR struct task_tcb_s *task_vforksetup(start_t retaddr, size_t *argsize);
+FAR struct task_tcb_s *nxtask_vforksetup(start_t retaddr, size_t *argsize);
-pid_t task_vforkstart(FAR struct task_tcb_s *child);
+pid_t nxtask_vforkstart(FAR struct task_tcb_s *child);
-void task_vforkabort(FAR struct task_tcb_s *child, int errcode);
+void nxtask_vforkabort(FAR struct task_tcb_s *child, int errcode);
 
 /****************************************************************************
  * Name: group_exitinfo

include/nuttx/userspace.h

@@ -113,24 +113,24 @@ struct userspace_s
 
   /* Task/thread startup routines */
 
-  void (*task_startup)(main_t entrypt, int argc, FAR char *argv[])
+  CODE void (*task_startup)(main_t entrypt, int argc, FAR char *argv[])
     noreturn_function;
 #ifndef CONFIG_DISABLE_PTHREAD
-  void (*pthread_startup)(pthread_startroutine_t entrypt,
+  CODE void (*pthread_startup)(pthread_startroutine_t entrypt,
     pthread_addr_t arg);
 #endif
 
   /* Signal handler trampoline */
 
 #ifndef CONFIG_DISABLE_SIGNALS
-  void (*signal_handler)(_sa_sigaction_t sighand, int signo,
+  CODE void (*signal_handler)(_sa_sigaction_t sighand, int signo,
     FAR siginfo_t *info, FAR void *ucontext);
 #endif
 
   /* User-space work queue support */
 
 #ifdef CONFIG_LIB_USRWORK
-  int (*work_usrstart)(void);
+  CODE int (*work_usrstart)(void);
 #endif
 };
 

sched/Kconfig

@@ -1212,8 +1212,8 @@ config SCHED_STARTHOOK
 	bool "Enable startup hook"
 	default n
 	---help---
-		Enable a non-standard, internal OS API call task_starthook().
+		Enable a non-standard, internal OS API call nxtask_starthook().
-		task_starthook() registers a function that will be called on task
+		nxtask_starthook() registers a function that will be called on task
 		startup before that actual task entry point is called.  The
 		starthook is useful, for example, for setting up automatic
 		configuration of C++ constructors.

sched/init/os_smpstart.c

@@ -84,7 +84,7 @@ static const char g_idlename[] = "CPUn Idle"
  *   This is the common start-up logic for the IDLE task for CPUs 1 through
  *   (CONFIG_SMP_NCPUS-1).  Having a start-up function such as this for the
  *   IDLE is not really an architectural necessity.  It is used only for
- *   symmetry with now other threads are started (see task_start() and
+ *   symmetry with now other threads are started (see nxtask_start() and
  *   pthread_start()).
  *
  * Input Parameters:

sched/mqueue/mq_recover.c

@@ -72,7 +72,7 @@
 void nxmq_recover(FAR struct tcb_s *tcb)
 {
   /* If were were waiting for a timed message queue event, then the
-   * timer was canceled and deleted in task_recover() before this
+   * timer was canceled and deleted in nxtask_recover() before this
    * function was called.
    */
 

sched/pthread/pthread_cancel.c

@@ -124,7 +124,7 @@ int pthread_cancel(pthread_t thread)
 
       if (tcb->cmn.cpcount > 0)
         {
-          notify_cancellation(&tcb->cmn);
+          nxnotify_cancellation(&tcb->cmn);
         }
 
       sched_unlock();
@@ -168,7 +168,7 @@ int pthread_cancel(pthread_t thread)
   pthread_mutex_inconsistent(tcb);
 #endif
 
-  /* Then let task_terminate do the real work */
+  /* Then let nxtask_terminate do the real work */
 
-  return task_terminate((pid_t)thread, false);
+  return nxtask_terminate((pid_t)thread, false);
 }

sched/pthread/pthread_create.c

@@ -94,7 +94,7 @@ static const char g_pthreadname[] = "<pthread>";
  *   This functions sets up parameters in the Task Control Block (TCB) in
  *   preparation for starting a new thread.
  *
- *   pthread_argsetup() is called from task_init() and task_start() to create
+ *   pthread_argsetup() is called from task_init() and nxtask_start() to create
  *   a new task (with arguments cloned via strdup) or pthread_create() which
  *   has one argument passed by value (distinguished by the pthread boolean
  *   argument).

sched/pthread/pthread_exit.c

@@ -137,7 +137,7 @@ void pthread_exit(FAR void *exit_value)
    * (2) so that we can flush buffered I/O (which may required suspending).
    */
 
-  task_exithook(tcb, EXIT_SUCCESS, false);
+  nxtask_exithook(tcb, EXIT_SUCCESS, false);
 
   /* Then just exit, retaining all file descriptors and without
    * calling atexit() functions.

sched/semaphore/sem_recover.c

@@ -53,7 +53,7 @@
  * Name: nxsem_recover
  *
  * Description:
- *   This function is called from task_recover() when a task is deleted via
+ *   This function is called from nxtask_recover() when a task is deleted via
  *   task_delete() or via pthread_cancel().  It current only checks on the
  *   case where a task is waiting for semaphore at the time that is was
  *   killed.

sched/signal/sig_default.c

@@ -527,7 +527,7 @@ bool nxsig_iscatchable(int signo)
  * Name: nxsig_default_initialize
  *
  * Description:
- *   Set all signals to their default action.  This is called from task_start
+ *   Set all signals to their default action.  This is called from nxtask_start
  *   to configure the newly started task.
  *
  * Input Parameters:

sched/task/exit.c

@@ -92,7 +92,7 @@ void exit(int status)
    * so that we can flush buffered I/O (both of which may required suspending).
    */
 
-  task_exithook(tcb, status, false);
+  nxtask_exithook(tcb, status, false);
 
   /* Then "really" exit.  Only the lower 8 bits of the exit status are used. */
 

sched/task/task.h

@@ -67,23 +67,23 @@ struct tcb_s; /* Forward reference */
 
 /* Task start-up */
 
-void task_start(void);
+void nxtask_start(void);
-int  task_schedsetup(FAR struct task_tcb_s *tcb, int priority,
+int  nxtask_schedsetup(FAR struct task_tcb_s *tcb, int priority,
        start_t start, main_t main, uint8_t ttype);
-int  task_argsetup(FAR struct task_tcb_s *tcb, FAR const char *name,
+int  nxtask_argsetup(FAR struct task_tcb_s *tcb, FAR const char *name,
        FAR char * const argv[]);
 
 /* Task exit */
 
-int  task_exit(void);
+int  nxtask_exit(void);
-int  task_terminate(pid_t pid, bool nonblocking);
+int  nxtask_terminate(pid_t pid, bool nonblocking);
-void task_exithook(FAR struct tcb_s *tcb, int status, bool nonblocking);
+void nxtask_exithook(FAR struct tcb_s *tcb, int status, bool nonblocking);
-void task_recover(FAR struct tcb_s *tcb);
+void nxtask_recover(FAR struct tcb_s *tcb);
 
 /* Cancellation points */
 
 #ifdef CONFIG_CANCELLATION_POINTS
-void notify_cancellation(FAR struct tcb_s *tcb);
+void nxnotify_cancellation(FAR struct tcb_s *tcb);
 #endif
 
 #endif /* __SCHED_TASK_TASK_H */

sched/task/task_activate.c

@@ -54,7 +54,7 @@
  * Name: task_activate
  *
  * Description:
- *   This function activates tasks initialized by task_schedsetup(). Without
+ *   This function activates tasks initialized by nxtask_schedsetup(). Without
  *   activation, a task is ineligible for execution by the scheduler.
  *
  * Input Parameters:

sched/task/task_cancelpt.c

@@ -315,7 +315,7 @@ bool check_cancellation_point(void)
 }
 
 /****************************************************************************
- * Name: notify_cancellation
+ * Name: nxnotify_cancellation
  *
  * Description:
  *   Called by task_delete() or pthread_cancel() if the cancellation occurs
@@ -327,7 +327,7 @@ bool check_cancellation_point(void)
  *
  ****************************************************************************/
 
-void notify_cancellation(FAR struct tcb_s *tcb)
+void nxnotify_cancellation(FAR struct tcb_s *tcb)
 {
   irqstate_t flags;
 

sched/task/task_create.c

@@ -1,8 +1,8 @@
 /****************************************************************************
  * sched/task/task_create.c
  *
- *   Copyright (C) 2007-2010, 2013-2014, 2016, 2018 Gregory Nutt. All rights
+ *   Copyright (C) 2007-2010, 2013-2014, 2016, 2018-2019 Gregory Nutt. All
- *     reserved.
+ *     rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -58,7 +58,7 @@
  ****************************************************************************/
 
 /****************************************************************************
- * Name: thread_create
+ * Name: nxthread_create
  *
  * Description:
  *   This function creates and activates a new thread of the specified type
@@ -83,8 +83,8 @@
  *
  ****************************************************************************/
 
-static int thread_create(FAR const char *name, uint8_t ttype, int priority,
+static int nxthread_create(FAR const char *name, uint8_t ttype,
-                         int stack_size, main_t entry,
+                           int priority, int stack_size, main_t entry,
                            FAR char * const argv[])
 {
   FAR struct task_tcb_s *tcb;
@@ -140,7 +140,7 @@ static int thread_create(FAR const char *name, uint8_t ttype, int priority,
 
   /* Initialize the task control block */
 
-  ret = task_schedsetup(tcb, priority, task_start, entry, ttype);
+  ret = nxtask_schedsetup(tcb, priority, nxtask_start, entry, ttype);
   if (ret < OK)
     {
       goto errout_with_tcb;
@@ -148,7 +148,7 @@ static int thread_create(FAR const char *name, uint8_t ttype, int priority,
 
   /* Setup to pass parameters to the new task */
 
-  (void)task_argsetup(tcb, name, argv);
+  (void)nxtask_argsetup(tcb, name, argv);
 
 #ifdef HAVE_TASK_GROUP
   /* Now we have enough in place that we can join the group */
@@ -172,7 +172,7 @@ static int thread_create(FAR const char *name, uint8_t ttype, int priority,
       ret = -get_errno();
       DEBUGASSERT(ret < 0);
 
-      /* The TCB was added to the active task list by task_schedsetup() */
+      /* The TCB was added to the active task list by nxtask_schedsetup() */
 
       dq_rem((FAR dq_entry_t *)tcb, (FAR dq_queue_t *)&g_inactivetasks);
       goto errout_with_tcb;
@@ -230,7 +230,7 @@ errout_with_tcb:
 int nxtask_create(FAR const char *name, int priority,
                   int stack_size, main_t entry, FAR char * const argv[])
 {
-  return thread_create(name, TCB_FLAG_TTYPE_TASK, priority, stack_size,
+  return nxthread_create(name, TCB_FLAG_TTYPE_TASK, priority, stack_size,
                          entry, argv);
 }
 
@@ -308,6 +308,6 @@ int task_create(FAR const char *name, int priority,
 int kthread_create(FAR const char *name, int priority,
                    int stack_size, main_t entry, FAR char *const argv[])
 {
-  return thread_create(name, TCB_FLAG_TTYPE_KERNEL, priority, stack_size,
+  return nxthread_create(name, TCB_FLAG_TTYPE_KERNEL, priority, stack_size,
                          entry, argv);
 }

sched/task/task_delete.c

@@ -59,7 +59,7 @@
  *   This function causes a specified task to cease to exist.  Its stack and
  *   TCB will be deallocated.  This function is the companion to
  *   task_create().  This is the version of the function exposed to the
- *   user; it is simply a wrapper around the internal, task_terminate
+ *   user; it is simply a wrapper around the internal, nxtask_terminate
  *   function.
  *
  *   The logic in this function only deletes non-running tasks.  If the
@@ -175,7 +175,7 @@ int task_delete(pid_t pid)
 
       if (dtcb->cpcount > 0)
         {
-          notify_cancellation(dtcb);
+          nxnotify_cancellation(dtcb);
         }
 
       sched_unlock();
@@ -196,10 +196,10 @@ int task_delete(pid_t pid)
     }
 
   /* Otherwise, perform the asynchronous cancellation, letting
-   * task_terminate() do all of the heavy lifting.
+   * nxtask_terminate() do all of the heavy lifting.
    */
 
-  ret = task_terminate(pid, false);
+  ret = nxtask_terminate(pid, false);
   if (ret < 0)
     {
       errcode = -ret;

sched/task/task_exit.c

@@ -54,7 +54,7 @@
  ****************************************************************************/
 
 /****************************************************************************
- * Name: task_exit
+ * Name: nxtask_exit
  *
  * Description:
  *   This is a part of the logic used to implement _exit().  The full
@@ -81,7 +81,7 @@
  *
  ****************************************************************************/
 
-int task_exit(void)
+int nxtask_exit(void)
 {
   FAR struct tcb_s *dtcb;
   FAR struct tcb_s *rtcb;
@@ -149,13 +149,13 @@ int task_exit(void)
   rtcb->task_state = TSTATE_TASK_READYTORUN;
 
   /* Move the TCB to the specified blocked task list and delete it.  Calling
-   * task_terminate with non-blocking true will suppress atexit() and on-exit()
+   * nxtask_terminate with non-blocking true will suppress atexit() and on-exit()
    * calls and will cause buffered I/O to fail to be flushed.  The former
    * is required _exit() behavior; the latter is optional _exit() behavior.
    */
 
   sched_addblocked(dtcb, TSTATE_TASK_INACTIVE);
-  ret = task_terminate(dtcb->pid, true);
+  ret = nxtask_terminate(dtcb->pid, true);
   rtcb->task_state = TSTATE_TASK_RUNNING;
 
   /* Decrement the lockcount on rctb. */

sched/task/task_exithook.c

@@ -1,7 +1,8 @@
 /****************************************************************************
  * sched/task/task_exithook.c
  *
- *   Copyright (C) 2011-2013, 2015. 2018 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2011-2013, 2015. 2018-2019 Gregory Nutt. All rights
+ *     reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -58,7 +59,7 @@
  ****************************************************************************/
 
 /****************************************************************************
- * Name: task_atexit
+ * Name: nxtask_atexit
  *
  * Description:
  *   Call any registered atexit function(s)
@@ -66,7 +67,7 @@
  ****************************************************************************/
 
 #if defined(CONFIG_SCHED_ATEXIT) && !defined(CONFIG_SCHED_ONEXIT)
-static inline void task_atexit(FAR struct tcb_s *tcb)
+static inline void nxtask_atexit(FAR struct tcb_s *tcb)
 {
   FAR struct task_group_s *group = tcb->group;
 
@@ -128,11 +129,11 @@ static inline void task_atexit(FAR struct tcb_s *tcb)
     }
 }
 #else
-#  define task_atexit(tcb)
+#  define nxtask_atexit(tcb)
 #endif
 
 /****************************************************************************
- * Name: task_onexit
+ * Name: nxtask_onexit
  *
  * Description:
  *   Call any registered on_exit function(s)
@@ -140,7 +141,7 @@ static inline void task_atexit(FAR struct tcb_s *tcb)
  ****************************************************************************/
 
 #ifdef CONFIG_SCHED_ONEXIT
-static inline void task_onexit(FAR struct tcb_s *tcb, int status)
+static inline void nxtask_onexit(FAR struct tcb_s *tcb, int status)
 {
   FAR struct task_group_s *group = tcb->group;
 
@@ -202,11 +203,11 @@ static inline void task_onexit(FAR struct tcb_s *tcb, int status)
     }
 }
 #else
-#  define task_onexit(tcb,status)
+#  define nxtask_onexit(tcb,status)
 #endif
 
 /****************************************************************************
- * Name: task_exitstatus
+ * Name: nxtask_exitstatus
  *
  * Description:
  *   Report exit status when main task of a task group exits
@@ -214,7 +215,8 @@ static inline void task_onexit(FAR struct tcb_s *tcb, int status)
  ****************************************************************************/
 
 #ifdef CONFIG_SCHED_CHILD_STATUS
-static inline void task_exitstatus(FAR struct task_group_s *group, int status)
+static inline void nxtask_exitstatus(FAR struct task_group_s *group,
+                                     int status)
 {
   FAR struct child_status_s *child;
 
@@ -245,12 +247,12 @@ static inline void task_exitstatus(FAR struct task_group_s *group, int status)
 }
 #else
 
-#  define task_exitstatus(group,status)
+#  define nxtask_exitstatus(group,status)
 
 #endif /* CONFIG_SCHED_CHILD_STATUS */
 
 /****************************************************************************
- * Name: task_groupexit
+ * Name: nxtask_groupexit
  *
  * Description:
  *   Mark that the final thread of a child task group as exited.
@@ -258,7 +260,7 @@ static inline void task_exitstatus(FAR struct task_group_s *group, int status)
  ****************************************************************************/
 
 #ifdef CONFIG_SCHED_CHILD_STATUS
-static inline void task_groupexit(FAR struct task_group_s *group)
+static inline void nxtask_groupexit(FAR struct task_group_s *group)
 {
   FAR struct child_status_s *child;
 
@@ -282,12 +284,12 @@ static inline void task_groupexit(FAR struct task_group_s *group)
 
 #else
 
-#  define task_groupexit(group)
+#  define nxtask_groupexit(group)
 
 #endif /* CONFIG_SCHED_CHILD_STATUS */
 
 /****************************************************************************
- * Name: task_sigchild
+ * Name: nxtask_sigchild
  *
  * Description:
  *   Send the SIGCHILD signal to the parent thread
@@ -296,7 +298,8 @@ static inline void task_groupexit(FAR struct task_group_s *group)
 
 #if defined(CONFIG_SCHED_HAVE_PARENT) && !defined(CONFIG_DISABLE_SIGNALS)
 #ifdef HAVE_GROUP_MEMBERS
-static inline void task_sigchild(gid_t pgid, FAR struct tcb_s *ctcb, int status)
+static inline void nxtask_sigchild(gid_t pgid, FAR struct tcb_s *ctcb,
+                                   int status)
 {
   FAR struct task_group_s *chgrp = ctcb->group;
   FAR struct task_group_s *pgrp;
@@ -329,7 +332,7 @@ static inline void task_sigchild(gid_t pgid, FAR struct tcb_s *ctcb, int status)
   if ((ctcb->flags & TCB_FLAG_TTYPE_MASK) != TCB_FLAG_TTYPE_PTHREAD)
 #endif
     {
-      task_exitstatus(pgrp, status);
+      nxtask_exitstatus(pgrp, status);
     }
 
   /* But only the final exiting thread in a task group, whatever it is,
@@ -340,7 +343,7 @@ static inline void task_sigchild(gid_t pgid, FAR struct tcb_s *ctcb, int status)
     {
       /* Mark that all of the threads in the task group have exited */
 
-      task_groupexit(pgrp);
+      nxtask_groupexit(pgrp);
 
       /* Create the siginfo structure.  We don't actually know the cause.
        * That is a bug. Let's just say that the child task just exited
@@ -366,7 +369,7 @@ static inline void task_sigchild(gid_t pgid, FAR struct tcb_s *ctcb, int status)
 
 #else /* HAVE_GROUP_MEMBERS */
 
-static inline void task_sigchild(FAR struct tcb_s *ptcb,
+static inline void nxtask_sigchild(FAR struct tcb_s *ptcb,
                                    FAR struct tcb_s *ctcb, int status)
 {
   siginfo_t info;
@@ -383,7 +386,7 @@ static inline void task_sigchild(FAR struct tcb_s *ptcb,
 #ifdef CONFIG_SCHED_CHILD_STATUS
       /* Save the exit status now of the main thread */
 
-      task_exitstatus(ptcb->group, status);
+      nxtask_exitstatus(ptcb->group, status);
 
 #else /* CONFIG_SCHED_CHILD_STATUS */
       /* Exit status is not retained.  Just decrement the number of
@@ -422,12 +425,12 @@ static inline void task_sigchild(FAR struct tcb_s *ptcb,
 #endif /* HAVE_GROUP_MEMBERS */
 #else /* CONFIG_SCHED_HAVE_PARENT && !CONFIG_DISABLE_SIGNALS */
 
-#  define task_sigchild(x,ctcb,status)
+#  define nxtask_sigchild(x,ctcb,status)
 
 #endif /* CONFIG_SCHED_HAVE_PARENT && !CONFIG_DISABLE_SIGNALS */
 
 /****************************************************************************
- * Name: task_signalparent
+ * Name: nxtask_signalparent
  *
  * Description:
  *   Send the SIGCHILD signal to the parent task group
@@ -435,7 +438,7 @@ static inline void task_sigchild(FAR struct tcb_s *ptcb,
  ****************************************************************************/
 
 #ifdef CONFIG_SCHED_HAVE_PARENT
-static inline void task_signalparent(FAR struct tcb_s *ctcb, int status)
+static inline void nxtask_signalparent(FAR struct tcb_s *ctcb, int status)
 {
 #ifdef HAVE_GROUP_MEMBERS
   DEBUGASSERT(ctcb && ctcb->group);
@@ -446,7 +449,7 @@ static inline void task_signalparent(FAR struct tcb_s *ctcb, int status)
 
   /* Send SIGCHLD to all members of the parent's task group */
 
-  task_sigchild(ctcb->group->tg_pgid, ctcb, status);
+  nxtask_sigchild(ctcb->group->tg_pgid, ctcb, status);
   sched_unlock();
 #else
   FAR struct tcb_s *ptcb;
@@ -456,7 +459,7 @@ static inline void task_signalparent(FAR struct tcb_s *ctcb, int status)
   sched_lock();
 
   /* Get the TCB of the receiving, parent task.  We do this early to
-   * handle multiple calls to task_signalparent.  ctcb->group->tg_ppid is
+   * handle multiple calls to nxtask_signalparent.  ctcb->group->tg_ppid is
    * set to an invalid value below and the following call will fail if we
    * are called again.
    */
@@ -472,7 +475,7 @@ static inline void task_signalparent(FAR struct tcb_s *ctcb, int status)
 
   /* Send SIGCHLD to all members of the parent's task group */
 
-  task_sigchild(ptcb, ctcb, status);
+  nxtask_sigchild(ptcb, ctcb, status);
 
   /* Forget who our parent was */
 
@@ -481,11 +484,11 @@ static inline void task_signalparent(FAR struct tcb_s *ctcb, int status)
 #endif
 }
 #else
-#  define task_signalparent(ctcb,status)
+#  define nxtask_signalparent(ctcb,status)
 #endif
 
 /****************************************************************************
- * Name: task_exitwakeup
+ * Name: nxtask_exitwakeup
  *
  * Description:
  *   Wakeup any tasks waiting for this task to exit
@@ -493,7 +496,7 @@ static inline void task_signalparent(FAR struct tcb_s *ctcb, int status)
  ****************************************************************************/
 
 #if defined(CONFIG_SCHED_WAITPID) && !defined(CONFIG_SCHED_HAVE_PARENT)
-static inline void task_exitwakeup(FAR struct tcb_s *tcb, int status)
+static inline void nxtask_exitwakeup(FAR struct tcb_s *tcb, int status)
 {
   FAR struct task_group_s *group = tcb->group;
 
@@ -549,11 +552,11 @@ static inline void task_exitwakeup(FAR struct tcb_s *tcb, int status)
     }
 }
 #else
-#  define task_exitwakeup(tcb, status)
+#  define nxtask_exitwakeup(tcb, status)
 #endif
 
 /****************************************************************************
- * Name: task_flushstreams
+ * Name: nxtask_flushstreams
  *
  * Description:
  *   Flush all streams when the final thread of a group exits.
@@ -561,7 +564,7 @@ static inline void task_exitwakeup(FAR struct tcb_s *tcb, int status)
  ****************************************************************************/
 
 #if CONFIG_NFILE_STREAMS > 0
-static inline void task_flushstreams(FAR struct tcb_s *tcb)
+static inline void nxtask_flushstreams(FAR struct tcb_s *tcb)
 {
   FAR struct task_group_s *group = tcb->group;
 
@@ -578,7 +581,7 @@ static inline void task_flushstreams(FAR struct tcb_s *tcb)
     }
 }
 #else
-#  define task_flushstreams(tcb)
+#  define nxtask_flushstreams(tcb)
 #endif
 
 /****************************************************************************
@@ -586,7 +589,7 @@ static inline void task_flushstreams(FAR struct tcb_s *tcb)
  ****************************************************************************/
 
 /****************************************************************************
- * Name: task_exithook
+ * Name: nxtask_exithook
  *
  * Description:
  *   This function implements some of the internal logic of exit() and
@@ -601,20 +604,20 @@ static inline void task_flushstreams(FAR struct tcb_s *tcb)
  *   to-run list.  The following logic is safe because we will not be
  *   returning from the exit() call.
  *
- *   When called from task_terminate() we are operating on a different thread;
+ *   When called from nxtask_terminate() we are operating on a different
- *   on the thread that called task_delete().  In this case, task_delete
+ *   thread; on the thread that called task_delete().  In this case,
- *   will have already removed the tcb from the ready-to-run list to prevent
+ *   task_delete will have already removed the tcb from the ready-to-run
- *   any further action on this task.
+ *   list to prevent any further action on this task.
  *
- *   nonblocking will be set true only when we are called from task_terminate()
+ *   nonblocking will be set true only when we are called from
- *   via _exit().  In that case, we must be careful to do nothing that can
+ *   nxtask_terminate() via _exit().  In that case, we must be careful to do
- *   cause the cause the thread to block.
+ *   nothing that can cause the cause the thread to block.
  *
  ****************************************************************************/
 
-void task_exithook(FAR struct tcb_s *tcb, int status, bool nonblocking)
+void nxtask_exithook(FAR struct tcb_s *tcb, int status, bool nonblocking)
 {
-  /* Under certain conditions, task_exithook() can be called multiple times.
+  /* Under certain conditions, nxtask_exithook() can be called multiple times.
    * A bit in the TCB was set the first time this function was called.  If
    * that bit is set, then just exit doing nothing more..
    */
@@ -653,11 +656,11 @@ void task_exithook(FAR struct tcb_s *tcb, int status, bool nonblocking)
 
   if (!nonblocking)
     {
-      task_atexit(tcb);
+      nxtask_atexit(tcb);
 
       /* Call any registered on_exit function(s) */
 
-      task_onexit(tcb, status);
+      nxtask_onexit(tcb, status);
     }
 #endif
 
@@ -665,15 +668,15 @@ void task_exithook(FAR struct tcb_s *tcb, int status, bool nonblocking)
    * state.  Make some feeble effort to recover the state.
    */
 
-  task_recover(tcb);
+  nxtask_recover(tcb);
 
   /* Send the SIGCHILD signal to the parent task group */
 
-  task_signalparent(tcb, status);
+  nxtask_signalparent(tcb, status);
 
   /* Wakeup any tasks waiting for this task to exit */
 
-  task_exitwakeup(tcb, status);
+  nxtask_exitwakeup(tcb, status);
 
   /* If this is the last thread in the group, then flush all streams (File
    * descriptors will be closed when the TCB is deallocated).
@@ -688,7 +691,7 @@ void task_exithook(FAR struct tcb_s *tcb, int status, bool nonblocking)
 
   if (!nonblocking)
     {
-      task_flushstreams(tcb);
+      nxtask_flushstreams(tcb);
     }
 
 #ifdef HAVE_TASK_GROUP

sched/task/task_init.c

@@ -80,7 +80,7 @@
  *
  * Returned Value:
  *   OK on success; ERROR on failure with errno set appropriately.  (See
- *   task_schedsetup() for possible failure conditions).  On failure, the
+ *   nxtask_schedsetup() for possible failure conditions).  On failure, the
  *   caller is responsible for freeing the stack memory and for calling
  *   sched_releasetcb() to free the TCB (which could be in most any state).
  *
@@ -129,7 +129,7 @@ int task_init(FAR struct tcb_s *tcb, const char *name, int priority,
 
   /* Initialize the task control block */
 
-  ret = task_schedsetup(ttcb, priority, task_start, entry,
+  ret = nxtask_schedsetup(ttcb, priority, nxtask_start, entry,
                           TCB_FLAG_TTYPE_TASK);
   if (ret < OK)
     {
@@ -139,7 +139,7 @@ int task_init(FAR struct tcb_s *tcb, const char *name, int priority,
 
   /* Setup to pass parameters to the new task */
 
-  (void)task_argsetup(ttcb, name, argv);
+  (void)nxtask_argsetup(ttcb, name, argv);
 
   /* Now we have enough in place that we can join the group */
 

sched/task/task_posixspawn.c

@@ -1,7 +1,7 @@
 /****************************************************************************
  * sched/task/task_posixspawn.c
  *
- *   Copyright (C) 2013, 2018 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2013, 2018-2019 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -58,7 +58,7 @@
  ****************************************************************************/
 
 /****************************************************************************
- * Name: posix_spawn_exec
+ * Name: nxposix_spawn_exec
  *
  * Description:
  *   Execute the task from the file system.
@@ -96,7 +96,7 @@
  *
  ****************************************************************************/
 
-static int posix_spawn_exec(FAR pid_t *pidp, FAR const char *path,
+static int nxposix_spawn_exec(FAR pid_t *pidp, FAR const char *path,
                               FAR const posix_spawnattr_t *attr,
                               FAR char * const argv[])
 {
@@ -153,18 +153,18 @@ errout:
 }
 
 /****************************************************************************
- * Name: posix_spawn_proxy
+ * Name: nxposix_spawn_proxy
  *
  * Description:
  *   Perform file_actions, then execute the task from the file system.
  *
  *   Do we really need this proxy task?  Isn't that wasteful?
  *
- *   Q: Why not use a starthook so that there is callout from task_start()
+ *   Q: Why not use a starthook so that there is callout from nxtask_start()
  *      to perform these operations after the file is loaded from
  *      the file system?
- *   A: That existing task_starthook() implementation cannot be used in
+ *   A: That existing nxtask_starthook() implementation cannot be used in
- *      this context; any of task_starthook() will also conflict with
+ *      this context; any of nxtask_starthook() will also conflict with
  *      binfmt's use of the start hook to call C++ static initializers.
  *      task_restart() would also be an issue.
  *
@@ -176,7 +176,7 @@ errout:
  *
  ****************************************************************************/
 
-static int posix_spawn_proxy(int argc, FAR char *argv[])
+static int nxposix_spawn_proxy(int argc, FAR char *argv[])
 {
   int ret;
 
@@ -200,7 +200,7 @@ static int posix_spawn_proxy(int argc, FAR char *argv[])
     {
       /* Start the task */
 
-      ret = posix_spawn_exec(g_spawn_parms.pid, g_spawn_parms.u.posix.path,
+      ret = nxposix_spawn_exec(g_spawn_parms.pid, g_spawn_parms.u.posix.path,
                                g_spawn_parms.attr, g_spawn_parms.argv);
 
 #ifdef CONFIG_SCHED_HAVE_PARENT
@@ -363,7 +363,7 @@ int posix_spawn(FAR pid_t *pid, FAR const char *path,
   if (file_actions ==  NULL || *file_actions == NULL)
 #endif
     {
-      return posix_spawn_exec(pid, path, attr, argv);
+      return nxposix_spawn_exec(pid, path, attr, argv);
     }
 
   /* Otherwise, we will have to go through an intermediary/proxy task in order
@@ -401,9 +401,9 @@ int posix_spawn(FAR pid_t *pid, FAR const char *path,
     }
 
   /* Disable pre-emption so that the proxy does not run until waitpid
-   * is called.  This is probably unnecessary since the posix_spawn_proxy has
+   * is called.  This is probably unnecessary since the nxposix_spawn_proxy
-   * the same priority as this thread; it should be schedule behind this
+   * has the same priority as this thread; it should be schedule behind
-   * task in the ready-to-run list.
+   * this task in the ready-to-run list.
    */
 
 #ifdef CONFIG_SCHED_WAITPID
@@ -414,14 +414,14 @@ int posix_spawn(FAR pid_t *pid, FAR const char *path,
    * task.
    */
 
-  proxy = kthread_create("posix_spawn_proxy", param.sched_priority,
+  proxy = kthread_create("nxposix_spawn_proxy", param.sched_priority,
                          CONFIG_POSIX_SPAWN_PROXY_STACKSIZE,
-                         (main_t)posix_spawn_proxy,
+                         (main_t)nxposix_spawn_proxy,
                          (FAR char * const *)NULL);
   if (proxy < 0)
     {
       ret = -proxy;
-      serr("ERROR: Failed to start posix_spawn_proxy: %d\n", ret);
+      serr("ERROR: Failed to start nxposix_spawn_proxy: %d\n", ret);
       goto errout_with_lock;
     }
 

sched/task/task_recover.c

@@ -56,7 +56,7 @@
  ****************************************************************************/
 
 /****************************************************************************
- * Name: task_recover
+ * Name: nxtask_recover
  *
  * Description:
  *   This function is called when a task is deleted via task_delete() or
@@ -74,7 +74,7 @@
  *
  ****************************************************************************/
 
-void task_recover(FAR struct tcb_s *tcb)
+void nxtask_recover(FAR struct tcb_s *tcb)
 {
   /* The task is being deleted.  Cancel in pending timeout events. */
 

sched/task/task_restart.c

@@ -137,7 +137,7 @@ int task_restart(pid_t pid)
 
   /* Try to recover from any bad states */
 
-  task_recover((FAR struct tcb_s *)tcb);
+  nxtask_recover((FAR struct tcb_s *)tcb);
 
   /* Kill any children of this thread */
 
@@ -219,7 +219,7 @@ int task_restart(pid_t pid)
   ret = task_activate((FAR struct tcb_s *)tcb);
   if (ret != OK)
     {
-      (void)task_terminate(pid, true);
+      (void)nxtask_terminate(pid, true);
       errcode = -ret;
       goto errout_with_lock;
     }