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mod_dbd.h
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/* 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. */ /** * @file mod_dbd.h * @brief Database Access Extension Module for Apache * * Overview of what this is and does: * http://www.apache.org/~niq/dbd.html * or * http://apache.webthing.com/database/ * * @defgroup MOD_DBD mod_dbd * @ingroup APACHE_MODS * @{ */ #ifndef DBD_H #define DBD_H /* Create a set of DBD_DECLARE(type), DBD_DECLARE_NONSTD(type) and * DBD_DECLARE_DATA with appropriate export and import tags for the platform */ #if !defined(WIN32) #define DBD_DECLARE(type) type #define DBD_DECLARE_NONSTD(type) type #define DBD_DECLARE_DATA #elif defined(DBD_DECLARE_STATIC) #define DBD_DECLARE(type) type __stdcall #define DBD_DECLARE_NONSTD(type) type #define DBD_DECLARE_DATA #elif defined(DBD_DECLARE_EXPORT) #define DBD_DECLARE(type) __declspec(dllexport) type __stdcall #define DBD_DECLARE_NONSTD(type) __declspec(dllexport) type #define DBD_DECLARE_DATA __declspec(dllexport) #else #define DBD_DECLARE(type) __declspec(dllimport) type __stdcall #define DBD_DECLARE_NONSTD(type) __declspec(dllimport) type #define DBD_DECLARE_DATA __declspec(dllimport) #endif #include <httpd.h> #include <apr_optional.h> #include <apr_hash.h> #include <apr_hooks.h> typedef struct { server_rec *server; const char *name; const char *params; int persist; #if APR_HAS_THREADS int nmin; int nkeep; int nmax; int exptime; int set; #endif apr_hash_t *queries; apr_array_header_t *init_queries; } dbd_cfg_t; typedef struct { apr_dbd_t *handle; const apr_dbd_driver_t *driver; apr_hash_t *prepared; apr_pool_t *pool; } ap_dbd_t; /* Export functions to access the database */ /* acquire a connection that MUST be explicitly closed. * Returns NULL on error */ DBD_DECLARE_NONSTD(ap_dbd_t*) ap_dbd_open(apr_pool_t*, server_rec*); /* release a connection acquired with ap_dbd_open */ DBD_DECLARE_NONSTD(void) ap_dbd_close(server_rec*, ap_dbd_t*); /* acquire a connection that will have the lifetime of a request * and MUST NOT be explicitly closed. Return NULL on error. * This is the preferred function for most applications. */ DBD_DECLARE_NONSTD(ap_dbd_t*) ap_dbd_acquire(request_rec*); /* acquire a connection that will have the lifetime of a connection * and MUST NOT be explicitly closed. Return NULL on error. * This is the preferred function for most applications. */ DBD_DECLARE_NONSTD(ap_dbd_t*) ap_dbd_cacquire(conn_rec*); /* Prepare a statement for use by a client module during * the server startup/configuration phase. Can't be called * after the server has created its children (use apr_dbd_*). */ DBD_DECLARE_NONSTD(void) ap_dbd_prepare(server_rec*, const char*, const char*); /* Also export them as optional functions for modules that prefer it */ APR_DECLARE_OPTIONAL_FN(ap_dbd_t*, ap_dbd_open, (apr_pool_t*, server_rec*)); APR_DECLARE_OPTIONAL_FN(void, ap_dbd_close, (server_rec*, ap_dbd_t*)); APR_DECLARE_OPTIONAL_FN(ap_dbd_t*, ap_dbd_acquire, (request_rec*)); APR_DECLARE_OPTIONAL_FN(ap_dbd_t*, ap_dbd_cacquire, (conn_rec*)); APR_DECLARE_OPTIONAL_FN(void, ap_dbd_prepare, (server_rec*, const char*, const char*)); APR_DECLARE_EXTERNAL_HOOK(dbd, DBD, apr_status_t, post_connect, (apr_pool_t *, dbd_cfg_t *, ap_dbd_t *)) #endif /** @} */