Re: Thread Function and access

"Peter Schmitt" wrote:


You need critical section only if more than one thread
access the same data. Then, in order to peresrve integrity
of the data, you guard it with critical section object, so
only one thread at a time can acquire an access.

Suppose you have class X with its method `Run' running as
thread:

struct X
{
    string m_str;
    CRITICAL_SECTION m_cs;

    unsigned Run();

    ...
};

Then, if there are several threads based on `Run' method,
you will need to protect `m_str':

unsigned X::Run()
{
    EnterCriticalSection(&m_cs);

    // do something with m_str
    m_str = ...

    LeaveCriticalSection(&m_cs);

    return 0;
}

In the example above only one thtread can access `m_str'
member at a time.

Alex