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Diffstat (limited to 'nuttx/sched/pthread_cancel.c')
-rw-r--r-- | nuttx/sched/pthread_cancel.c | 148 |
1 files changed, 0 insertions, 148 deletions
diff --git a/nuttx/sched/pthread_cancel.c b/nuttx/sched/pthread_cancel.c deleted file mode 100644 index 5e34eeaba..000000000 --- a/nuttx/sched/pthread_cancel.c +++ /dev/null @@ -1,148 +0,0 @@ -/************************************************************************** - * sched/pthread_cancel.c - * - * Copyright (C) 2007, 2009 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 <sys/types.h> -#include <unistd.h> -#include <pthread.h> -#include <errno.h> - -#include "os_internal.h" -#include "pthread_internal.h" - -/************************************************************************** - * Private Definitions - **************************************************************************/ - -/************************************************************************** - * Private Types - **************************************************************************/ - -/************************************************************************** - * Private Function Prototypes - **************************************************************************/ - -/************************************************************************** - * Global Variables - **************************************************************************/ - -/************************************************************************** - * Private Variables - **************************************************************************/ - -/************************************************************************** - * Private Functions - **************************************************************************/ - -/************************************************************************** - * Public Functions - **************************************************************************/ - -int pthread_cancel(pthread_t thread) -{ - _TCB *tcb; - - /* First, make sure that the handle references a valid thread */ - - if (!thread) - { - /* pid == 0 is the IDLE task. Callers cannot cancel the - * IDLE task. - */ - - return ESRCH; - } - - tcb = sched_gettcb((pid_t)thread); - if (!tcb) - { - /* The pid does not correspond to any known thread */ - - return ESRCH; - } - - /* Check to see if this thread has the non-cancelable bit set in its - * flags. Suppress context changes for a bit so that the flags are stable. - * (the flags should not change in interrupt handling. - */ - - sched_lock(); - if ((tcb->flags & TCB_FLAG_NONCANCELABLE) != 0) - { - /* Then we cannot cancel the thread now. Here is how this is - * supposed to work: - * - * "When cancelability is disabled, all cancels are held pending - * in the target thread until the thread changes the cancelability. - * When cancelability is deferred, all cancels are held pending in - * the target thread until the thread changes the cancelability, calls - * a function which is a cancellation point or calls pthread_testcancel(), - * thus creating a cancellation point. When cancelability is asynchronous, - * all cancels are acted upon immediately, interrupting the thread with its - * processing." - */ - - tcb->flags |= TCB_FLAG_CANCEL_PENDING; - sched_unlock(); - return OK; - } - - sched_unlock(); - - /* Check to see if the ID refers to ourselves.. this would be the - * same as pthread_exit(PTHREAD_CANCELED). - */ - - if (tcb == (_TCB*)g_readytorun.head) - { - pthread_exit(PTHREAD_CANCELED); - } - - /* Complete pending join operations */ - - (void)pthread_completejoin((pid_t)thread, PTHREAD_CANCELED); - - /* Then let pthread_delete do the real work */ - - task_delete((pid_t)thread); - return OK; -} - - |