当前位置: 首页>>代码示例>>C++>>正文

C++ prepare_to_copy函数代码示例

本文整理汇总了C++中prepare_to_copy函数的典型用法代码示例。如果您正苦于以下问题：C++ prepare_to_copy函数的具体用法？C++ prepare_to_copy怎么用？C++ prepare_to_copy使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。


在下文中一共展示了prepare_to_copy函数的6个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: prepare_to_copy

static struct task_struct *dup_task_struct(struct task_struct *orig)
{
	struct task_struct *tsk;
	struct thread_info *ti;

	prepare_to_copy(orig);

	tsk = alloc_task_struct();
	if (!tsk)
		return NULL;

	ti = alloc_thread_info(tsk);
	if (!ti) {
		free_task_struct(tsk);
		return NULL;
	}

	*ti = *orig->thread_info;
	*tsk = *orig;
	tsk->thread_info = ti;
	ti->task = tsk;

	/* One for us, one for whoever does the "release_task()" (usually parent) */
	atomic_set(&tsk->usage,2);
	return tsk;
}
开发者ID:Antonio-Zhou，项目名称:Linux-2.6.11，代码行数:26，代码来源:fork.c

示例2: prepare_to_copy

static struct task_struct *dup_task_struct(struct task_struct *orig)
{
	struct task_struct *tsk;
	struct thread_info *ti;

	prepare_to_copy(orig);

	tsk = alloc_task_struct();
	if (!tsk)
		return NULL;

	ti = alloc_thread_info(tsk);
	if (!ti) {
		free_task_struct(tsk);
		return NULL;
	}

	*tsk = *orig;
	tsk->thread_info = ti;
	setup_thread_stack(tsk, orig);

	/* One for us, one for whoever does the "release_task()" (usually parent) */
	atomic_set(&tsk->usage,2);
	atomic_set(&tsk->fs_excl, 0);
	tsk->btrace_seq = 0;
	tsk->splice_pipe = NULL;
	return tsk;
}
开发者ID:FatSunHYS，项目名称:OSCourseDesign，代码行数:28，代码来源:fork.c

示例3: tsk_fork_get_node

static struct task_struct *dup_task_struct(struct task_struct *orig)
{
	struct task_struct *tsk;
	struct thread_info *ti;
	unsigned long *stackend;
	int node = tsk_fork_get_node(orig);
	int err;

	prepare_to_copy(orig);

	tsk = alloc_task_struct_node(node);
	if (!tsk)
		return NULL;

	ti = alloc_thread_info_node(tsk, node);
	if (!ti) {
		free_task_struct(tsk);
		return NULL;
	}

	err = arch_dup_task_struct(tsk, orig);
	if (err)
		goto out;

	tsk->stack = ti;

	err = prop_local_init_single(&tsk->dirties);
	if (err)
		goto out;

	setup_thread_stack(tsk, orig);
	clear_user_return_notifier(tsk);
	clear_tsk_need_resched(tsk);
	stackend = end_of_stack(tsk);
	*stackend = STACK_END_MAGIC;	/* for overflow detection */

#ifdef CONFIG_CC_STACKPROTECTOR
	tsk->stack_canary = get_random_int();
#endif

	/*
	 * One for us, one for whoever does the "release_task()" (usually
	 * parent)
	 */
	atomic_set(&tsk->usage, 2);
#ifdef CONFIG_BLK_DEV_IO_TRACE
	tsk->btrace_seq = 0;
#endif
	tsk->splice_pipe = NULL;

	account_kernel_stack(ti, 1);

	return tsk;

out:
	free_thread_info(ti);
	free_task_struct(tsk);
	return NULL;
}
开发者ID:Ntemis，项目名称:LG_X3_P880_v20a，代码行数:59，代码来源:fork.c

示例4: tsk_fork_get_node

static struct task_struct *dup_task_struct(struct task_struct *orig)
{
	struct task_struct *tsk;
	struct thread_info *ti;
	unsigned long *stackend;
	int node = tsk_fork_get_node(orig);
	int err;

	prepare_to_copy(orig);

	tsk = alloc_task_struct_node(node);
	if (!tsk)
		return NULL;

	ti = alloc_thread_info_node(tsk, node);
	if (!ti) {
		free_task_struct(tsk);
		return NULL;
	}

	err = arch_dup_task_struct(tsk, orig);
	if (err)
		goto out;

	tsk->stack = ti;

	setup_thread_stack(tsk, orig);
	clear_user_return_notifier(tsk);
	clear_tsk_need_resched(tsk);
	stackend = end_of_stack(tsk);
	*stackend = STACK_END_MAGIC;	

#ifdef CONFIG_CC_STACKPROTECTOR
	tsk->stack_canary = get_random_int();
#endif

	atomic_set(&tsk->usage, 2);
#ifdef CONFIG_BLK_DEV_IO_TRACE
	tsk->btrace_seq = 0;
#endif
	tsk->splice_pipe = NULL;

	account_kernel_stack(ti, 1);

	return tsk;

out:
	free_thread_info(ti);
	free_task_struct(tsk);
	return NULL;
}
开发者ID:MiniBlu，项目名称:cm11_kernel_htc_msm8974a3ul，代码行数:51，代码来源:fork.c

示例5: prepare_to_copy

static struct task_struct *dup_task_struct(struct task_struct *orig)
{
	struct task_struct *tsk;
	struct thread_info *ti;

	prepare_to_copy(orig);

	/*
	 * 为新进程获取进程描述符
	 */
	tsk = alloc_task_struct();
	if (!tsk)
		return NULL;

	/*
	 * 获取一片空闲区域4k或者8k, 用来存放新进程的thread_info结构和内核栈
	 */
	ti = alloc_thread_info(tsk);
	if (!ti) {
		free_task_struct(tsk);
		return NULL;
	}

	/*
	 * 将current进程描述符的内容复制到tsk所指向的task_struct结构中
	 */
	*ti = *orig->thread_info;
	/*
	 * 把current进程的thread_info描述符的内容复制到ti中
	 */
	*tsk = *orig;
	/*
	 * 下面两行将新进程的task_struct与thread_info绑定
	 */
	tsk->thread_info = ti;
	ti->task = tsk;

	/* One for us, one for whoever does the "release_task()" (usually parent) */
	atomic_set(&tsk->usage,2);
	return tsk;
}
开发者ID:Pating，项目名称:linux-2.6.12-rc2，代码行数:41，代码来源:fork.c

示例6: tsk_fork_get_node

static struct task_struct *dup_task_struct(struct task_struct *orig)
{
	struct task_struct *tsk;
	struct thread_info *ti;
	unsigned long *stackend;
	int node = tsk_fork_get_node(orig);
	int err;

	prepare_to_copy(orig);

	tsk = alloc_task_struct_node(node);
	if (!tsk)
		return NULL;

	ti = alloc_thread_info_node(tsk, node);
	if (!ti) {
		free_task_struct(tsk);
		return NULL;
	}

	err = arch_dup_task_struct(tsk, orig);
	if (err)
		goto out;

	tsk->stack = ti;
#ifdef CONFIG_SECCOMP
	/*
	 * We must handle setting up seccomp filters once we're under
	 * the sighand lock in case orig has changed between now and
	 * then. Until then, filter must be NULL to avoid messing up
	 * the usage counts on the error path calling free_task.
	 */
	tsk->seccomp.filter = NULL;
#endif

	setup_thread_stack(tsk, orig);
	clear_user_return_notifier(tsk);
	clear_tsk_need_resched(tsk);
	stackend = end_of_stack(tsk);
	*stackend = STACK_END_MAGIC;	/* for overflow detection */

#ifdef CONFIG_CC_STACKPROTECTOR
	tsk->stack_canary = get_random_int();
#endif

	/*
	 * One for us, one for whoever does the "release_task()" (usually
	 * parent)
	 */
	atomic_set(&tsk->usage, 2);
#ifdef CONFIG_BLK_DEV_IO_TRACE
	tsk->btrace_seq = 0;
#endif
	tsk->splice_pipe = NULL;

	account_kernel_stack(ti, 1);

	return tsk;

out:
	free_thread_info(ti);
	free_task_struct(tsk);
	return NULL;
}
开发者ID:cm13-rhine，项目名称:android_kernel_sony_msm8974，代码行数:64，代码来源:fork.c


注：本文中的prepare_to_copy函数示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。