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Diffstat (limited to 'nuttx/sched/task_getgroup.c')
-rw-r--r-- | nuttx/sched/task_getgroup.c | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/nuttx/sched/task_getgroup.c b/nuttx/sched/task_getgroup.c new file mode 100644 index 000000000..fc5bd166e --- /dev/null +++ b/nuttx/sched/task_getgroup.c @@ -0,0 +1,105 @@ +/***************************************************************************** + * sched/task_getgroup.c + * + * Copyright (C) 2013 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" +#include "group_internal.h" + +#ifdef HAVE_TASK_GROUP + +/***************************************************************************** + * Pre-processor Definitions + *****************************************************************************/ + +/***************************************************************************** + * Private Types + *****************************************************************************/ + +/***************************************************************************** + * Private Data + *****************************************************************************/ + +/***************************************************************************** + * Public Data + *****************************************************************************/ + +/***************************************************************************** + * Private Functions + *****************************************************************************/ + +/***************************************************************************** + * Public Functions + *****************************************************************************/ + +/***************************************************************************** + * Name: task_getgroup + * + * Description: + * Given a task ID, return the group structure of this task. + * + * Parameters: + * pid - The task ID to use in the lookup. + * + * Return Value: + * On success, a pointer to the group task structure is returned. This + * function can fail only if there is no group that corresponds to the + * groupd ID. + * + * Assumptions: + * Called during when signally tasks in a safe context. No special + * precautions should be required here. However, extra care is taken when + * accessing the global g_grouphead list. + * + *****************************************************************************/ + +FAR struct task_group_s *task_getgroup(pid_t pid) +{ + FAR _TCB *tcb = sched_gettcb(pid); + if (tcb) + { + return tcb->group; + } + + return NULL; +} + +#endif /* HAVE_TASK_GROUP */ |