343 lines
9.6 KiB
C
343 lines
9.6 KiB
C
/****************************************************************************
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* sched/task/task_spawnparms.c
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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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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <fcntl.h>
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#include <spawn.h>
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#include <debug.h>
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#include <nuttx/semaphore.h>
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#include <nuttx/signal.h>
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#include <nuttx/spawn.h>
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#include <nuttx/fs/fs.h>
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#include "task/spawn.h"
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#include "task/task.h"
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/****************************************************************************
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* Public Data
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****************************************************************************/
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sem_t g_spawn_parmsem = SEM_INITIALIZER(1);
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#ifndef CONFIG_SCHED_WAITPID
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sem_t g_spawn_execsem = SEM_INITIALIZER(0);
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#endif
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struct spawn_parms_s g_spawn_parms;
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: nxspawn_close, nxspawn_dup2, and nxspawn_open
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*
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* Description:
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* Implement individual file actions
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*
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* Input Parameters:
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* action - describes the action to be performed
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*
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* Returned Value:
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* posix_spawn() and posix_spawnp() will return zero on success.
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* Otherwise, an error number will be returned as the function return
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* value to indicate the error.
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*
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****************************************************************************/
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static inline int nxspawn_close(FAR struct spawn_close_file_action_s *action)
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{
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/* The return value from nx_close() is ignored */
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sinfo("Closing fd=%d\n", action->fd);
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nx_close(action->fd);
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return OK;
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}
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static inline int nxspawn_dup2(FAR struct spawn_dup2_file_action_s *action)
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{
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int ret;
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/* Perform the dup */
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sinfo("Dup'ing %d->%d\n", action->fd1, action->fd2);
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ret = nx_dup2(action->fd1, action->fd2);
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if (ret < 0)
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{
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serr("ERROR: dup2 failed: %d\n", ret);
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return ret;
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}
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return OK;
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}
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static inline int nxspawn_open(FAR struct spawn_open_file_action_s *action)
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{
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int fd;
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int ret = OK;
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/* Open the file */
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sinfo("Open'ing path=%s oflags=%04x mode=%04x\n",
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action->path, action->oflags, action->mode);
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fd = nx_open(action->path, action->oflags, action->mode);
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if (fd < 0)
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{
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ret = fd;
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serr("ERROR: open failed: %d\n", ret);
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}
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/* Does the return file descriptor happen to match the required file
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* descriptor number?
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*/
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else if (fd != action->fd)
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{
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/* No.. dup2 to get the correct file number */
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sinfo("Dup'ing %d->%d\n", fd, action->fd);
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ret = nx_dup2(fd, action->fd);
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if (ret < 0)
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{
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serr("ERROR: dup2 failed: %d\n", ret);
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}
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sinfo("Closing fd=%d\n", fd);
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nx_close(fd);
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}
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return ret;
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}
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/****************************************************************************
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* Public Functions
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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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* See nxsem_wait_uninterruptible
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*
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****************************************************************************/
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int spawn_semtake(FAR sem_t *sem)
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{
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return nxsem_wait_uninterruptible(sem);
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}
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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 not because errors
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* cannot occur, but rather 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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struct sched_param param;
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int ret;
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DEBUGASSERT(attr);
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/* Now set the attributes. Note that we ignore all of the return values
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* here because we have already successfully started the task. If we
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* return an error value, then we would also have to stop the task.
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*/
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/* If we are only setting the priority, then call sched_setparm()
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* to set the priority of the of the new task.
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*/
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if ((attr->flags & POSIX_SPAWN_SETSCHEDPARAM) != 0)
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{
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#ifdef CONFIG_SCHED_SPORADIC
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/* Get the current sporadic scheduling parameters. Those will not be
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* modified.
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*/
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ret = nxsched_get_param(pid, ¶m);
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if (ret < 0)
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{
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return ret;
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}
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#endif
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/* Get the priority from the attributes */
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param.sched_priority = attr->priority;
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/* If we are setting *both* the priority and the scheduler,
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* then we will call nxsched_set_scheduler() below.
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*/
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if ((attr->flags & POSIX_SPAWN_SETSCHEDULER) == 0)
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{
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sinfo("Setting priority=%d for pid=%d\n",
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param.sched_priority, pid);
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ret = nxsched_set_param(pid, ¶m);
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if (ret < 0)
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{
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return ret;
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}
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}
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}
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/* If we are only changing the scheduling policy, then reset
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* the priority to the default value (the same as this thread) in
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* preparation for the nxsched_set_scheduler() call below.
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*/
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else if ((attr->flags & POSIX_SPAWN_SETSCHEDULER) != 0)
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{
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ret = nxsched_get_param(0, ¶m);
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if (ret < 0)
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{
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return ret;
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}
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}
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/* Are we setting the scheduling policy? If so, use the priority
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* setting determined above.
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*/
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if ((attr->flags & POSIX_SPAWN_SETSCHEDULER) != 0)
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{
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sinfo("Setting policy=%d priority=%d for pid=%d\n",
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attr->policy, param.sched_priority, pid);
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#ifdef CONFIG_SCHED_SPORADIC
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/* But take the sporadic scheduler parameters from the attributes */
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param.sched_ss_low_priority = (int)attr->low_priority;
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param.sched_ss_max_repl = (int)attr->max_repl;
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param.sched_ss_repl_period.tv_sec = attr->repl_period.tv_sec;
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param.sched_ss_repl_period.tv_nsec = attr->repl_period.tv_nsec;
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param.sched_ss_init_budget.tv_sec = attr->budget.tv_sec;
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param.sched_ss_init_budget.tv_nsec = attr->budget.tv_nsec;
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#endif
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nxsched_set_scheduler(pid, attr->policy, ¶m);
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}
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return OK;
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}
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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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{
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FAR struct spawn_general_file_action_s *entry;
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int ret = OK;
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/* Check if we need to change the signal mask */
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if (attr != NULL && (attr->flags & POSIX_SPAWN_SETSIGMASK) != 0)
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{
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nxsig_procmask(SIG_SETMASK, &attr->sigmask, NULL);
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}
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/* Were we also requested to perform file actions? */
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if (file_actions != NULL)
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{
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/* Yes.. Execute each file action */
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for (entry = (FAR struct spawn_general_file_action_s *)file_actions;
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entry && ret == OK;
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entry = entry->flink)
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{
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switch (entry->action)
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{
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case SPAWN_FILE_ACTION_CLOSE:
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ret = nxspawn_close((FAR struct spawn_close_file_action_s *)
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entry);
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break;
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case SPAWN_FILE_ACTION_DUP2:
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ret = nxspawn_dup2((FAR struct spawn_dup2_file_action_s *)
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entry);
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break;
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case SPAWN_FILE_ACTION_OPEN:
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ret = nxspawn_open((FAR struct spawn_open_file_action_s *)
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entry);
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break;
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case SPAWN_FILE_ACTION_NONE:
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default:
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serr("ERROR: Unknown action: %d\n", entry->action);
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ret = EINVAL;
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break;
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}
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}
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}
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return ret;
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}
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