线程安全 [英] Thread safety
问题描述
以下线程是否安全:
1.假设对象是任何简单对象
对象* fn()
{
对象* p =新对象();
返回p;
}
2.按值返回线程安全吗?
3. int * p = new int
这个线程安全吗?
谢谢
2007-06-06 15:29, ar ******** @ gmail.com 写道:
以下是线程安全:
这不是这个组的问题,因为C ++没有定义
线程,你应该在一个问题中提出这样的问题您的平台组/
线程库。
1.假设对象是任何简单对象
对象* fn()
{
对象* p =新对象();
返回p;
}
如果分配器是线程安全的那么是。
2.是按值线程安全返回的吗?
堆栈上的所有内容本质上都应该是线程安全的。
3. int * p = new int
这个线程安全吗?
见1.
-
Erik Wikstr?m
6月6日上午8:29,arun.da ... @ gmail.com写道:
以下是线程安全:
1.假设对象是任何简单对象
对象* fn()
{
对象* p = new Object();
返回p;
}
关于此(1)我没有看到这种伤害,即使我也不知道这样做,
>
2.按价值线程返回安全?
3. int * p = new int
这个,我认为它没有意义。
这个线程安全吗?
谢谢
6月6日晚上8:29,arun.da ... @ gmail.com写道:
以下线程是否安全:
1.假设对象是任何简单对象
对象* fn()
{
对象* p =新对象();
返回p;
}
2.返回者值线程安全吗?
3. int * p = new int
这个线程安全吗?
谢谢
每个线程都有自己的堆栈和寄存器帧。因此,所有
都不能访问全局分配的对象是安全的。在你的代码中,就像
一样,只有第三种情况看起来像是在全球空间中(再次,
它在你的帖子中)。
Are the following thread safe:
1. Assuming Object is any simple object
Object* fn()
{
Object *p = new Object();
return p;
}
2. is return by value thread safe?
3. int *p = new int
is this thread safe?
Thanks
解决方案On 2007-06-06 15:29, ar********@gmail.com wrote:Are the following thread safe:This is not a question for this group, since C++ does not define
threads, you should ask such questions in a group for your platform/
threading library.
1. Assuming Object is any simple object
Object* fn()
{
Object *p = new Object();
return p;
}If the allocator is thread-safe then yes.
2. is return by value thread safe?Everything on the stack should be thread-safe by nature.
3. int *p = new int
is this thread safe?See 1.
--
Erik Wikstr?m
On Jun 6, 8:29 am, arun.da...@gmail.com wrote:Are the following thread safe:
1. Assuming Object is any simple object
Object* fn()
{
Object *p = new Object();
return p;
}about this(1)i dont see the harm, even doe i woldnt do it so,
>
2. is return by value thread safe?
3. int *p = new intand this, i thinck it''s meaningless.
is this thread safe?
Thanks
On Jun 6, 8:29 pm, arun.da...@gmail.com wrote:Are the following thread safe:
1. Assuming Object is any simple object
Object* fn()
{
Object *p = new Object();
return p;
}
2. is return by value thread safe?
3. int *p = new int
is this thread safe?
ThanksEach thread has it`s own stack and register frame. So everything that
does not access globally allocated objects is safe. In your code, as
it is, only the third case looks like its in a global space (again, as
it is in your post).
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