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Diffstat (limited to 'nuttx/sched/spawn_internal.h')
-rw-r--r-- | nuttx/sched/spawn_internal.h | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/nuttx/sched/spawn_internal.h b/nuttx/sched/spawn_internal.h new file mode 100644 index 000000000..6520f3947 --- /dev/null +++ b/nuttx/sched/spawn_internal.h @@ -0,0 +1,158 @@ +/**************************************************************************** + * 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 + ****************************************************************************/ + +/**************************************************************************** + * 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 */ |