| /* |
| * root_pools.c : Implement svn_root_pools__* API |
| * |
| * ==================================================================== |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * ==================================================================== |
| */ |
| |
| #include "svn_pools.h" |
| |
| #include "private/svn_subr_private.h" |
| #include "private/svn_mutex.h" |
| |
| struct svn_root_pools__t |
| { |
| /* unused pools. |
| * Use MUTEX to serialize access to this collection. |
| */ |
| apr_array_header_t *unused_pools; |
| |
| /* Mutex to serialize access to UNUSED_POOLS */ |
| svn_mutex__t *mutex; |
| |
| }; |
| |
| svn_error_t * |
| svn_root_pools__create(svn_root_pools__t **pools) |
| { |
| /* the collection of root pools must be managed independently from |
| any other pool */ |
| apr_pool_t *pool |
| = apr_allocator_owner_get(svn_pool_create_allocator(FALSE)); |
| |
| /* construct result object */ |
| svn_root_pools__t *result = apr_pcalloc(pool, sizeof(*result)); |
| SVN_ERR(svn_mutex__init(&result->mutex, TRUE, pool)); |
| result->unused_pools = apr_array_make(pool, 16, sizeof(apr_pool_t *)); |
| |
| /* done */ |
| *pools = result; |
| |
| return SVN_NO_ERROR; |
| } |
| |
| /* Return a currently unused connection pool in *POOL. If no such pool |
| * exists, create a new root pool and return that in *POOL. |
| */ |
| static svn_error_t * |
| acquire_pool_internal(apr_pool_t **pool, |
| svn_root_pools__t *pools) |
| { |
| SVN_ERR(svn_mutex__lock(pools->mutex)); |
| *pool = pools->unused_pools->nelts |
| ? *(apr_pool_t **)apr_array_pop(pools->unused_pools) |
| : apr_allocator_owner_get(svn_pool_create_allocator(FALSE)); |
| SVN_ERR(svn_mutex__unlock(pools->mutex, SVN_NO_ERROR)); |
| |
| return SVN_NO_ERROR; |
| } |
| |
| apr_pool_t * |
| svn_root_pools__acquire_pool(svn_root_pools__t *pools) |
| { |
| apr_pool_t *pool; |
| svn_error_t *err = acquire_pool_internal(&pool, pools); |
| if (err) |
| { |
| /* Mutex failure?! Well, try to continue with unrecycled data. */ |
| svn_error_clear(err); |
| pool = apr_allocator_owner_get(svn_pool_create_allocator(FALSE)); |
| } |
| |
| return pool; |
| } |
| |
| void |
| svn_root_pools__release_pool(apr_pool_t *pool, |
| svn_root_pools__t *pools) |
| { |
| svn_error_t *err; |
| |
| svn_pool_clear(pool); |
| |
| err = svn_mutex__lock(pools->mutex); |
| if (err) |
| { |
| svn_error_clear(err); |
| svn_pool_destroy(pool); |
| } |
| else |
| { |
| APR_ARRAY_PUSH(pools->unused_pools, apr_pool_t *) = pool; |
| svn_error_clear(svn_mutex__unlock(pools->mutex, SVN_NO_ERROR)); |
| } |
| } |