1251881Speter/* 2251881Speter * blncache.c: DAV baseline information cache. 3251881Speter * 4251881Speter * ==================================================================== 5251881Speter * Licensed to the Apache Software Foundation (ASF) under one 6251881Speter * or more contributor license agreements. See the NOTICE file 7251881Speter * distributed with this work for additional information 8251881Speter * regarding copyright ownership. The ASF licenses this file 9251881Speter * to you under the Apache License, Version 2.0 (the 10251881Speter * "License"); you may not use this file except in compliance 11251881Speter * with the License. You may obtain a copy of the License at 12251881Speter * 13251881Speter * http://www.apache.org/licenses/LICENSE-2.0 14251881Speter * 15251881Speter * Unless required by applicable law or agreed to in writing, 16251881Speter * software distributed under the License is distributed on an 17251881Speter * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 18251881Speter * KIND, either express or implied. See the License for the 19251881Speter * specific language governing permissions and limitations 20251881Speter * under the License. 21251881Speter * ==================================================================== 22251881Speter */ 23251881Speter 24251881Speter#include <apr_pools.h> 25251881Speter 26251881Speter#include "svn_hash.h" 27251881Speter#include "svn_dirent_uri.h" 28251881Speter#include "svn_types.h" 29251881Speter#include "svn_pools.h" 30251881Speter 31251881Speter#include "blncache.h" 32251881Speter 33251881Speter/* Baseline information cache object. */ 34251881Spetertypedef struct baseline_info_t 35251881Speter{ 36251881Speter const char *bc_url; /* baseline collection URL. */ 37251881Speter svn_revnum_t revision; /* revision associated with the baseline. */ 38251881Speter 39251881Speter} baseline_info_t; 40251881Speter 41251881Speter/* Module-private structure used to hold the caches. */ 42251881Speterstruct svn_ra_serf__blncache_t 43251881Speter{ 44251881Speter /* A hash mapping 'svn_revnum_t *' baseline revisions to 'const 45251881Speter * char *' baseline collection URLs. 46251881Speter */ 47251881Speter apr_hash_t *revnum_to_bc; 48251881Speter 49251881Speter /* A hash mapping 'const char *' baseline URLs to 'baseline_info_t *' 50251881Speter * structures. (Allocated from the same pool as 'revnum_to_bc'.) 51251881Speter */ 52251881Speter apr_hash_t *baseline_info; 53251881Speter}; 54251881Speter 55251881Speter 56251881Speter 57251881Speter/* Return a pointer to an 'baseline_info_t' structure allocated from 58251881Speter * POOL and populated with BC_URL (which is duped into POOL) and 59251881Speter * REVISION. 60251881Speter */ 61251881Speterstatic baseline_info_t * 62251881Speterbaseline_info_make(const char *bc_url, 63251881Speter svn_revnum_t revision, 64251881Speter apr_pool_t *pool) 65251881Speter{ 66251881Speter baseline_info_t *result = apr_palloc(pool, sizeof(*result)); 67251881Speter 68251881Speter result->bc_url = apr_pstrdup(pool, bc_url); 69251881Speter result->revision = revision; 70251881Speter 71251881Speter return result; 72251881Speter} 73251881Speter 74251881Speter/* Set in HASH the value VAL for the KEY (whose key length is KLEN). 75251881Speter * KEY will be duped into HASH's pool. 76251881Speter */ 77251881Speterstatic void 78251881Speterhash_set_copy(apr_hash_t *hash, 79251881Speter const void *key, 80251881Speter apr_ssize_t klen, 81251881Speter const void *val) 82251881Speter{ 83251881Speter if (klen == APR_HASH_KEY_STRING) 84251881Speter klen = strlen(key); 85251881Speter apr_hash_set(hash, apr_pmemdup(apr_hash_pool_get(hash), key, klen), 86251881Speter klen, val); 87251881Speter} 88251881Speter 89251881Speter 90251881Spetersvn_error_t * 91251881Spetersvn_ra_serf__blncache_create(svn_ra_serf__blncache_t **blncache_p, 92251881Speter apr_pool_t *pool) 93251881Speter{ 94251881Speter svn_ra_serf__blncache_t *blncache = apr_pcalloc(pool, sizeof(*blncache)); 95251881Speter apr_pool_t *cache_pool; 96251881Speter 97251881Speter /* Create subpool for cached data. It will be cleared if we reach maximum 98251881Speter * cache size.*/ 99251881Speter cache_pool = svn_pool_create(pool); 100251881Speter blncache->revnum_to_bc = apr_hash_make(cache_pool); 101251881Speter blncache->baseline_info = apr_hash_make(cache_pool); 102251881Speter 103251881Speter *blncache_p = blncache; 104251881Speter 105251881Speter return SVN_NO_ERROR; 106251881Speter} 107251881Speter 108251881Speter#define MAX_CACHE_SIZE 1000 109251881Speter 110251881Spetersvn_error_t * 111251881Spetersvn_ra_serf__blncache_set(svn_ra_serf__blncache_t *blncache, 112251881Speter const char *baseline_url, 113251881Speter svn_revnum_t revision, 114251881Speter const char *bc_url, 115251881Speter apr_pool_t *pool) 116251881Speter{ 117251881Speter if (bc_url && SVN_IS_VALID_REVNUM(revision)) 118251881Speter { 119251881Speter apr_pool_t *cache_pool = apr_hash_pool_get(blncache->revnum_to_bc); 120251881Speter 121251881Speter /* If the caches are too big, delete and recreate 'em and move along. */ 122251881Speter if (MAX_CACHE_SIZE < (apr_hash_count(blncache->baseline_info) 123251881Speter + apr_hash_count(blncache->revnum_to_bc))) 124251881Speter { 125251881Speter svn_pool_clear(cache_pool); 126251881Speter blncache->revnum_to_bc = apr_hash_make(cache_pool); 127251881Speter blncache->baseline_info = apr_hash_make(cache_pool); 128251881Speter } 129251881Speter 130251881Speter hash_set_copy(blncache->revnum_to_bc, &revision, sizeof(revision), 131251881Speter apr_pstrdup(cache_pool, bc_url)); 132251881Speter 133251881Speter if (baseline_url) 134251881Speter { 135251881Speter hash_set_copy(blncache->baseline_info, baseline_url, 136251881Speter APR_HASH_KEY_STRING, 137251881Speter baseline_info_make(bc_url, revision, cache_pool)); 138251881Speter } 139251881Speter } 140251881Speter 141251881Speter return SVN_NO_ERROR; 142251881Speter} 143251881Speter 144251881Speter#undef MAX_CACHE_SIZE 145251881Speter 146251881Spetersvn_error_t * 147251881Spetersvn_ra_serf__blncache_get_bc_url(const char **bc_url_p, 148251881Speter svn_ra_serf__blncache_t *blncache, 149251881Speter svn_revnum_t revnum, 150251881Speter apr_pool_t *pool) 151251881Speter{ 152251881Speter const char *value = apr_hash_get(blncache->revnum_to_bc, 153251881Speter &revnum, sizeof(revnum)); 154251881Speter *bc_url_p = value ? apr_pstrdup(pool, value) : NULL; 155251881Speter return SVN_NO_ERROR; 156251881Speter} 157251881Speter 158251881Spetersvn_error_t * 159251881Spetersvn_ra_serf__blncache_get_baseline_info(const char **bc_url_p, 160251881Speter svn_revnum_t *revision_p, 161251881Speter svn_ra_serf__blncache_t *blncache, 162251881Speter const char *baseline_url, 163251881Speter apr_pool_t *pool) 164251881Speter{ 165251881Speter baseline_info_t *info = svn_hash_gets(blncache->baseline_info, baseline_url); 166251881Speter if (info) 167251881Speter { 168251881Speter *bc_url_p = apr_pstrdup(pool, info->bc_url); 169251881Speter *revision_p = info->revision; 170251881Speter } 171251881Speter else 172251881Speter { 173251881Speter *bc_url_p = NULL; 174251881Speter *revision_p = SVN_INVALID_REVNUM; 175251881Speter } 176251881Speter 177251881Speter return SVN_NO_ERROR; 178251881Speter} 179251881Speter 180