Re: Thread safety

Wed, 06 Jun 2007 20:57:19 -0000
On Jun 6, 8:25 pm, Gianni Mariani <> wrote: wrote:

Are the following thread safe:

Assuming you're using either GCC, VC++ or the Intel compiler...

1. Assuming Object is any simple object
Object* fn()
   Object *p = new Object();
   return p;

Safe if you use the supplied new operator.

2. is return by value thread safe?

Safe if the copy constructor is thread safe.

3. int *p = new int
is this thread safe?

Safe assuming that p is not used before it is initialized.

Thanks for the reply... i just have 2 quick question:

1. You said that if i use the default new operator then using
Object *p = new Object();
is thread safe right...

but if i have a condition like:
Object1* p1 = new Object1();
else if(thread2)
Object2* p1 = new Object2();

and if both thread1 and thread2 are active at the same time and
running the above code then will new still be thread safe?

2. Is the following thread safe:
void fn()
  static Object o;
assuming multiple threds are active

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