Re: Avoiding the anonymous variable declaration RAII error...
Sohail Somani wrote:
On Tue, 11 Mar 2008 12:42:33 -0600, Eric J. Holtman wrote:
[snip]
However, it's a massive race condition just waiting to happen if you
forget the "lk", and just write:
void
process_threaded_data ()
{
Locker (m_mutex);
[snip]
Is there some way to design class Locker so that writing the second
piece of code comes up as an error?
[snip]
You can try writing a macro:
// don't know the actual syntax for creating the variable based on line
// number
#define WITH_MUTEX(mtx) Locker lck ## __LINE__ (mtx);
And then you use it like this:
void
process_threaded_data()
{
WITH_MUTEX(mtx)
{
...
}
}
That's the only thing I can think of :-)
Another possiblity is:
#define BEGIN_CRIT_SEC(mtx) do { Locker lk##__LINE__(mtx);
#define END_CRIT_SEC } while(false)
That way you explicitly show your critical sections.
--
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