Re: APR pools, mutexes and thread safe allocations

[Jim Jagielski]

Please READ apr_pools.c... Search for '->mutex'

> On Feb 20, 2017, at 10:58 AM, Yann Ylavic <ylavic....@gmail.com> wrote:
> 
> On Mon, Feb 20, 2017 at 4:43 PM, Jim Jagielski <j...@apache.org> wrote:
>> You are confusing pool mutexes with allocator mutexes...
> 
> I'm not sure to understand, there is no pool mutex per se currently,
> the mutex (if any) used by the pool is its allocator's.
> 
> So as Brane says, if one sets a mutex to the allocator of a pool
> because (s)he wants pool_create/destroy() to be thread-safe, it does
> not necessarily wants the same for palloc() and friends (e.g. the pool
> is used by a single thread).
> 
> I think we should not (re)use the allocator mutex if we want the pool
> allocations to be thread-safe, but precisely have a separate pool
> mutex.