volatile and thread safety

Hi,

Is the following thread safe??

class Sample
{
private:
volatile int number;
public:
Sample():number(0) {}

void read()
{
++number;
// do nothing
--number;
}
};

I would like to know if the function read() were executed by multiple
threads simultaniously, would function be thread safe?

I mean would the ++ and -- operation be tomic?

ar********@gmail.com wrote:

>Hi,

Is the following thread safe??

class Sample
{
private:
volatile int number;
public:
Sample():number(0) {}

void read()
{
++number;
// do nothing
--number;
}
};

I would like to know if the function read() were executed by multiple
threads simultaniously, would function be thread safe?

NO.

>I mean would the ++ and -- operation be tomic?

NO.

Try comp.programming.threads.

threads simultaniously, would function be thread safe?

I mean would the ++ and -- operation be tomic?