C++ (Cpp) posix_cpu_timers_init_groupの例

コード例 #1

static int copy_signal(unsigned long clone_flags, struct task_struct *tsk)
{
    struct signal_struct *sig;

    if (clone_flags & CLONE_THREAD)
        return 0;

    sig = kmem_cache_alloc(signal_cachep, GFP_KERNEL);
    tsk->signal = sig;
    if (!sig)
        return -ENOMEM;

    atomic_set(&sig->sigcnt, 1);
    atomic_set(&sig->count, 1);
    atomic_set(&sig->live, 1);
    init_waitqueue_head(&sig->wait_chldexit);
    sig->flags = 0;
    if (clone_flags & CLONE_NEWPID)
        sig->flags |= SIGNAL_UNKILLABLE;
    sig->group_exit_code = 0;
    sig->group_exit_task = NULL;
    sig->group_stop_count = 0;
    sig->curr_target = tsk;
    init_sigpending(&sig->shared_pending);
    INIT_LIST_HEAD(&sig->posix_timers);

    hrtimer_init(&sig->real_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
    sig->it_real_incr.tv64 = 0;
    sig->real_timer.function = it_real_fn;

    sig->leader = 0;	/* session leadership doesn't inherit */
    sig->tty_old_pgrp = NULL;
    sig->tty = NULL;

    sig->utime = sig->stime = sig->cutime = sig->cstime = cputime_zero;
    sig->gtime = cputime_zero;
    sig->cgtime = cputime_zero;
    sig->nvcsw = sig->nivcsw = sig->cnvcsw = sig->cnivcsw = 0;
    sig->min_flt = sig->maj_flt = sig->cmin_flt = sig->cmaj_flt = 0;
    sig->inblock = sig->oublock = sig->cinblock = sig->coublock = 0;
    sig->maxrss = sig->cmaxrss = 0;
    task_io_accounting_init(&sig->ioac);
    sig->sum_sched_runtime = 0;
    taskstats_tgid_init(sig);

    task_lock(current->group_leader);
    memcpy(sig->rlim, current->signal->rlim, sizeof sig->rlim);
    task_unlock(current->group_leader);

    posix_cpu_timers_init_group(sig);

    acct_init_pacct(&sig->pacct);

    tty_audit_fork(sig);
    sched_autogroup_fork(sig);

    sig->oom_adj = current->signal->oom_adj;

    return 0;
}

コード例 #2

ファイル: fork.c プロジェクト: itsmerajit/kernel_otus

static int copy_signal(unsigned long clone_flags, struct task_struct *tsk)
{
	struct signal_struct *sig;

	if (clone_flags & CLONE_THREAD)
		return 0;

	sig = kmem_cache_zalloc(signal_cachep, GFP_KERNEL);
	tsk->signal = sig;
	if (!sig)
		return -ENOMEM;

	sig->nr_threads = 1;
	atomic_set(&sig->live, 1);
	atomic_set(&sig->sigcnt, 1);

	/* list_add(thread_node, thread_head) without INIT_LIST_HEAD() */
	sig->thread_head = (struct list_head)LIST_HEAD_INIT(tsk->thread_node);
	tsk->thread_node = (struct list_head)LIST_HEAD_INIT(sig->thread_head);

	init_waitqueue_head(&sig->wait_chldexit);
	if (clone_flags & CLONE_NEWPID)
		sig->flags |= SIGNAL_UNKILLABLE;
	sig->curr_target = tsk;
	init_sigpending(&sig->shared_pending);
	INIT_LIST_HEAD(&sig->posix_timers);

	hrtimer_init(&sig->real_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
	sig->real_timer.function = it_real_fn;

	task_lock(current->group_leader);
	memcpy(sig->rlim, current->signal->rlim, sizeof sig->rlim);
	task_unlock(current->group_leader);

	posix_cpu_timers_init_group(sig);

	tty_audit_fork(sig);
	sched_autogroup_fork(sig);

#ifdef CONFIG_CGROUPS
	init_rwsem(&sig->group_rwsem);
#endif

	sig->oom_adj = current->signal->oom_adj;
	sig->oom_score_adj = current->signal->oom_score_adj;
	sig->oom_score_adj_min = current->signal->oom_score_adj_min;

#ifdef CONFIG_ANDROID_LMK_ADJ_RBTREE
	RB_CLEAR_NODE(&sig->adj_node);
#endif
	sig->has_child_subreaper = current->signal->has_child_subreaper ||
				   current->signal->is_child_subreaper;

	mutex_init(&sig->cred_guard_mutex);

	return 0;
}

コード例 #3

static int copy_signal(unsigned long clone_flags, struct task_struct *tsk)
{
	struct signal_struct *sig;

	if (clone_flags & CLONE_THREAD)
		return 0;

	sig = kmem_cache_zalloc(signal_cachep, GFP_KERNEL);
	tsk->signal = sig;
	if (!sig)
		return -ENOMEM;

	sig->nr_threads = 1;
	atomic_set(&sig->live, 1);
	atomic_set(&sig->sigcnt, 1);
	init_waitqueue_head(&sig->wait_chldexit);
	if (clone_flags & CLONE_NEWPID)
		sig->flags |= SIGNAL_UNKILLABLE;
	sig->curr_target = tsk;
	init_sigpending(&sig->shared_pending);
	INIT_LIST_HEAD(&sig->posix_timers);

	hrtimer_init(&sig->real_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
	sig->real_timer.function = it_real_fn;

	task_lock(current->group_leader);
	memcpy(sig->rlim, current->signal->rlim, sizeof sig->rlim);
	task_unlock(current->group_leader);

	posix_cpu_timers_init_group(sig);

	tty_audit_fork(sig);
	sched_autogroup_fork(sig);

#ifdef CONFIG_CGROUPS
	init_rwsem(&sig->threadgroup_fork_lock);
#endif
#ifdef CONFIG_CPUSETS
	seqcount_init(&tsk->mems_allowed_seq);
#endif

	sig->oom_adj = current->signal->oom_adj;
	sig->oom_score_adj = current->signal->oom_score_adj;
	sig->oom_score_adj_min = current->signal->oom_score_adj_min;

	mutex_init(&sig->cred_guard_mutex);

	return 0;
}

コード例 #4

ファイル: fork.c プロジェクト: KaZoom/buildroot-linux-kernel-m3

static int copy_signal(unsigned long clone_flags, struct task_struct *tsk)
{
	struct signal_struct *sig;

	if (clone_flags & CLONE_THREAD)
		return 0;

	sig = kmem_cache_zalloc(signal_cachep, GFP_KERNEL);
	tsk->signal = sig;
	if (!sig)
		return -ENOMEM;

	atomic_set(&sig->count, 1);
	atomic_set(&sig->live, 1);
	init_waitqueue_head(&sig->wait_chldexit);
	if (clone_flags & CLONE_NEWPID)
		sig->flags |= SIGNAL_UNKILLABLE;
	sig->curr_target = tsk;
	init_sigpending(&sig->shared_pending);
	INIT_LIST_HEAD(&sig->posix_timers);

	hrtimer_init(&sig->real_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
	sig->real_timer.function = it_real_fn;

	task_lock(current->group_leader);
	memcpy(sig->rlim, current->signal->rlim, sizeof sig->rlim);
	task_unlock(current->group_leader);

	posix_cpu_timers_init_group(sig);

	tty_audit_fork(sig);

	sig->oom_adj = current->signal->oom_adj;

	return 0;
}