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Using Pools in Apache: Processing a Request

All the request processing hooks take the form

int my_func(request_rec* r) {
  /* implement the request processing hook here */

This puts the request pool r->pool at your disposal. As discussed above, the request pool is appropriate for the vast majority of operations involved in processing a request. That's what you pass to Apache and APR functions that need a pool argument, as well as your own.

The process pool is available as r->server->process->pool for operations that need to allocate long-lived resources; for example, cacheing a resource that should be computed once and subsequently re-used in other requests. The connection pool is r->connection->pool.