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/****************************************************************************
* sched/spawn_internal.h
*
* 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.
*
****************************************************************************/
#ifndef __SCHED_SPAWN_INERNAL_H
#define __SCHED_SPAWN_INERNAL_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <spawn.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#ifndef CONFIG_POSIX_SPAWN_PROXY_STACKSIZE
# define CONFIG_POSIX_SPAWN_PROXY_STACKSIZE 1024
#endif
/****************************************************************************
* Public Type Definitions
****************************************************************************/
struct spawn_parms_s
{
/* Common parameters */
int result;
FAR pid_t *pid;
FAR const posix_spawn_file_actions_t *file_actions;
FAR const posix_spawnattr_t *attr;
FAR char * const *argv;
/* Parameters that differ for posix_spawn[p] and task_spawn */
union
{
struct
{
FAR const char *path;
} posix;
struct
{
FAR const char *name;
main_t entry;
} task;
} u;
};
/****************************************************************************
* Public Data
****************************************************************************/
extern sem_t g_spawn_parmsem;
#ifndef CONFIG_SCHED_WAITPID
extern sem_t g_spawn_execsem;
#endif
extern struct spawn_parms_s g_spawn_parms;
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/****************************************************************************
* Name: spawn_semtake and spawn_semgive
*
* Description:
* Give and take semaphores
*
* Input Parameters:
*
* sem - The semaphore to act on.
*
* Returned Value:
* None
*
****************************************************************************/
void spawn_semtake(FAR sem_t *sem);
#define spawn_semgive(sem) sem_post(sem)
/****************************************************************************
* Name: spawn_execattrs
*
* Description:
* Set attributes of the new child task after it has been spawned.
*
* Input Parameters:
*
* pid - The pid of the new task.
* attr - The attributes to use
*
* Returned Value:
* Errors are not reported by this function. This is because errors
* cannot occur, but ratther that the new task has already been started
* so there is no graceful way to handle errors detected in this context
* (unless we delete the new task and recover).
*
* Assumptions:
* That task has been started but has not yet executed because pre-
* emption is disabled.
*
****************************************************************************/
int spawn_execattrs(pid_t pid, FAR const posix_spawnattr_t *attr);
/****************************************************************************
* Name: spawn_proxyattrs
*
* Description:
* Set attributes of the proxy task before it has started the new child
* task.
*
* Input Parameters:
*
* pid - The pid of the new task.
* attr - The attributes to use
* file_actions - The attributes to use
*
* Returned Value:
* 0 (OK) on successed; A negated errno value is returned on failure.
*
****************************************************************************/
int spawn_proxyattrs(FAR const posix_spawnattr_t *attr,
FAR const posix_spawn_file_actions_t *file_actions);
#endif /* __SCHED_SPAWN_INERNAL_H */
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