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Diffstat (limited to 'nuttx/sched/task_deletecurrent.c')
-rw-r--r-- | nuttx/sched/task_deletecurrent.c | 152 |
1 files changed, 0 insertions, 152 deletions
diff --git a/nuttx/sched/task_deletecurrent.c b/nuttx/sched/task_deletecurrent.c deleted file mode 100644 index e1e06acf6..000000000 --- a/nuttx/sched/task_deletecurrent.c +++ /dev/null @@ -1,152 +0,0 @@ -/**************************************************************************** - * sched/task_deletecurrent.c - * - * Copyright (C) 2008-2009, 2012 Gregory Nutt. All rights reserved. - * Author: Gregory Nutt <gnutt@nuttx.org> - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * 3. Neither the name NuttX nor the names of its contributors may be - * used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS - * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE - * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, - * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS - * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED - * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN - * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - * - ****************************************************************************/ - -/**************************************************************************** - * Included Files - ****************************************************************************/ - -#include <nuttx/config.h> - -#include <sched.h> -#include "os_internal.h" -#ifndef CONFIG_DISABLE_SIGNALS -# include "sig_internal.h" -#endif - -/**************************************************************************** - * Definitions - ****************************************************************************/ - -/**************************************************************************** - * Private Type Declarations - ****************************************************************************/ - -/**************************************************************************** - * Global Variables - ****************************************************************************/ - -/**************************************************************************** - * Private Variables - ****************************************************************************/ - -/**************************************************************************** - * Private Function Prototypes - ****************************************************************************/ - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: task_delete - * - * Description: - * This function causes the currently running task (i.e., the task at the - * head of the ready-to-run list) to cease to exist. This is a part of - * the logic used to implement _exit(). The full implementation of _exit() - * is architecture-dependent. This function should never be called from - * normal user code, but only from the architecture-specific implementation - * of exit. - * - * Inputs: - * None - * - * Return Value: - * OK on success; or ERROR on failure - * - * Assumeptions: - * Interrupts are disabled. - * - ****************************************************************************/ - -int task_deletecurrent(void) -{ - FAR _TCB *dtcb = (FAR _TCB*)g_readytorun.head; - FAR _TCB *rtcb; - - /* Remove the TCB of the current task from the ready-to-run list. A context - * switch will definitely be necessary -- that must be done by the - * architecture-specific logic. - * - * sched_removereadytorun will mark the task at the head of the ready-to-run - * with state == TSTATE_TASK_RUNNING - */ - - (void)sched_removereadytorun(dtcb); - rtcb = (FAR _TCB*)g_readytorun.head; - - /* We are now in a bad state -- the head of the ready to run task list - * does not correspond to the thread that is running. Disabling pre- - * emption on this TCB and marking the new ready-to-run task as not - * running (see, for example, get_errno_ptr()). - * - * We disable pre-emption here by directly incrementing the lockcount - * (vs. calling sched_lock()). - */ - - rtcb->lockcount++; - rtcb->task_state = TSTATE_TASK_READYTORUN; - - /* Move the TCB to the specified blocked task list and delete it */ - - sched_addblocked(dtcb, TSTATE_TASK_INACTIVE); - task_delete(dtcb->pid); - rtcb->task_state = TSTATE_TASK_RUNNING; - - /* If there are any pending tasks, then add them to the ready-to-run - * task list now - */ - - if (g_pendingtasks.head) - { - (void)sched_mergepending(); - } - - /* We can't use sched_unlock() to decrement the lock count because the - * sched_mergepending() call above might have changed the task at the - * head of the ready-to-run list. Furthermore, we should not need to - * perform the unlock action anyway because we know that the pending - * task list is empty. So all we really need to do is to decrement - * the lockcount on rctb. - */ - - rtcb->lockcount--; - return OK; -} - |