static int posix_spawn_exec(FAR pid_t *pidp, FAR const char *path,
FAR const posix_spawnattr_t *attr,
FAR char * const argv[])
{
FAR const struct symtab_s *symtab;
int nsymbols;
int pid;
int ret = OK;
DEBUGASSERT(path);
/* Get the current symbol table selection */
exec_getsymtab(&symtab, &nsymbols);
/* Disable pre-emption so that we can modify the task parameters after
* we start the new task; the new task will not actually begin execution
* until we re-enable pre-emption.
*/
sched_lock();
/* Start the task */
pid = exec(path, (FAR char * const *)argv, symtab, nsymbols);
if (pid < 0)
{
ret = get_errno();
sdbg("ERROR: exec failed: %d\n", ret);
goto errout;
}
/* Return the task ID to the caller */
if (pid)
{
*pidp = pid;
}
/* Now set the attributes. Note that we ignore all of the return values
* here because we have already successfully started the task. If we
* return an error value, then we would also have to stop the task.
*/
if (attr)
{
(void)spawn_execattrs(pid, attr);
}
/* Re-enable pre-emption and return */
errout:
sched_unlock();
return ret;
}
static int task_spawn_exec(FAR pid_t *pidp, FAR const char *name,
main_t entry, FAR const posix_spawnattr_t *attr,
FAR char * const *argv)
{
size_t stacksize;
int priority;
int pid;
int ret = OK;
/* Disable pre-emption so that we can modify the task parameters after
* we start the new task; the new task will not actually begin execution
* until we re-enable pre-emption.
*/
sched_lock();
/* Use the default task priority and stack size if no attributes are provided */
if (attr)
{
priority = attr->priority;
stacksize = attr->stacksize;
}
else
{
struct sched_param param;
/* Set the default priority to the same priority as this task */
ret = sched_getparam(0, ¶m);
if (ret < 0)
{
goto errout;
}
priority = param.sched_priority;
stacksize = CONFIG_TASK_SPAWN_DEFAULT_STACKSIZE;
}
/* Start the task */
pid = task_create(name, priority, stacksize, entry, argv);
if (pid < 0)
{
ret = get_errno();
serr("ERROR: task_create failed: %d\n", ret);
goto errout;
}
/* Return the task ID to the caller */
if (pid)
{
*pidp = pid;
}
/* Now set the attributes. Note that we ignore all of the return values
* here because we have already successfully started the task. If we
* return an error value, then we would also have to stop the task.
*/
if (attr)
{
(void)spawn_execattrs(pid, attr);
}
/* Re-enable pre-emption and return */
errout:
sched_unlock();
return ret;
}