148 lines
4.5 KiB
C
148 lines
4.5 KiB
C
/****************************************************************************
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* sched/task/spawn.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __SCHED_TASK_SPAWN_H
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#define __SCHED_TASK_SPAWN_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <spawn.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#ifndef CONFIG_POSIX_SPAWN_PROXY_STACKSIZE
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# define CONFIG_POSIX_SPAWN_PROXY_STACKSIZE 1024
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#endif
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/****************************************************************************
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* Public Type Definitions
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****************************************************************************/
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struct spawn_parms_s
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{
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/* Common parameters */
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int result;
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FAR pid_t *pid;
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FAR const posix_spawn_file_actions_t *file_actions;
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FAR const posix_spawnattr_t *attr;
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FAR char * const *argv;
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/* Parameters that differ for posix_spawn[p] and task_spawn */
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union
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{
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struct
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{
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FAR const char *path;
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} posix;
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struct
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{
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FAR const char *name;
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main_t entry;
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} task;
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} u;
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};
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/****************************************************************************
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* Public Data
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****************************************************************************/
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extern sem_t g_spawn_parmsem;
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#ifndef CONFIG_SCHED_WAITPID
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extern sem_t g_spawn_execsem;
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#endif
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extern struct spawn_parms_s g_spawn_parms;
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: spawn_semtake and spawn_semgive
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*
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* Description:
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* Give and take semaphores
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*
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* Input Parameters:
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*
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* sem - The semaphore to act on.
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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int spawn_semtake(FAR sem_t *sem);
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#define spawn_semgive(sem) nxsem_post(sem)
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/****************************************************************************
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* Name: spawn_execattrs
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*
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* Description:
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* Set attributes of the new child task after it has been spawned.
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*
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* Input Parameters:
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*
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* pid - The pid of the new task.
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* attr - The attributes to use
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*
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* Returned Value:
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* Errors are not reported by this function. This is because errors
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* cannot occur, but ratther that the new task has already been started
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* so there is no graceful way to handle errors detected in this context
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* (unless we delete the new task and recover).
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*
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* Assumptions:
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* That task has been started but has not yet executed because pre-
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* emption is disabled.
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*
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****************************************************************************/
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int spawn_execattrs(pid_t pid, FAR const posix_spawnattr_t *attr);
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/****************************************************************************
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* Name: spawn_proxyattrs
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*
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* Description:
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* Set attributes of the proxy task before it has started the new child
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* task.
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*
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* Input Parameters:
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*
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* pid - The pid of the new task.
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* attr - The attributes to use
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* file_actions - The attributes to use
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*
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* Returned Value:
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* 0 (OK) on success; A negated errno value is returned on failure.
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*
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****************************************************************************/
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int spawn_proxyattrs(FAR const posix_spawnattr_t *attr,
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FAR const posix_spawn_file_actions_t *file_actions);
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#endif /* __SCHED_TASK_SPAWN_H */
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