Re: The cost of pthread-mutexes or corresponding...

[Richard Levitte - VMS Whacker]

From: Rich Salz <[EMAIL PROTECTED]>

rsalz> > structure itself.  I'd do a malloc(size_of_mutex() + sizeof(RSA)) and
rsalz> > return a pointer to the RSA part of that blob.  I haven't thought
rsalz> > through everything yet.
rsalz> 
rsalz> You can't do that; pthreads, for example, often implement the
rsalz> mutex as an opaque pointers.

Yup, and that pointer will then take 4 or 8 bytes, and that's the size
that wold be allocated.

Of course, the mutex itself still creates heap fragmentation, but I
see no way of getting away from that (of course, that gives food to
those who want to minimise the amount of locks).

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