src/TortoiseMerge/svninclude/svn_dso.h

   1 /**
   2  * @copyright
   3  * ====================================================================
   4  *    Licensed to the Apache Software Foundation (ASF) under one
   5  *    or more contributor license agreements.  See the NOTICE file
   6  *    distributed with this work for additional information
   7  *    regarding copyright ownership.  The ASF licenses this file
   8  *    to you under the Apache License, Version 2.0 (the
   9  *    "License"); you may not use this file except in compliance
  10  *    with the License.  You may obtain a copy of the License at
  11  *
  12  *      http://www.apache.org/licenses/LICENSE-2.0
  13  *
  14  *    Unless required by applicable law or agreed to in writing,
  15  *    software distributed under the License is distributed on an
  16  *    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  17  *    KIND, either express or implied.  See the License for the
  18  *    specific language governing permissions and limitations
  19  *    under the License.
  20  * ====================================================================
  21  * @endcopyright
  22  *
  23  * @file svn_dso.h
  24  * @brief DSO loading routines
  25  */
  26
  27
  28 \f
  29 #ifndef SVN_DSO_H
  30 #define SVN_DSO_H
  31
  32 #include <apr_dso.h>
  33
  34 #include "svn_types.h"
  35
  36 #ifdef __cplusplus
  37 extern "C" {
  38 #endif /* __cplusplus */
  39
  40 /**
  41  * Initialize the DSO loading routines.
  42  *
  43  * @note This should be called prior to the creation of any pool that
  44  *       is passed to a function that comes from a DSO, otherwise you
  45  *       risk having the DSO unloaded before all pool cleanup callbacks
  46  *       that live in the DSO have been executed.  If it is not called
  47  *       prior to @c svn_dso_load being used for the first time there
  48  *       will be a best effort attempt made to initialize the subsystem,
  49  *       but it will not be entirely thread safe and it risks running
  50  *       into the previously mentioned problems with DSO unloading and
  51  *       pool cleanup callbacks.
  52  *
  53  * Returns svn_error_t object with corresponding apr_err returned by
  54  * underlying calls. In case of no error returns @c SVN_NO_ERROR.
  55  *
  56  * @since New in 1.6.
  57  */
  58 svn_error_t *
  59 svn_dso_initialize2(void);
  60
  61 /** The same as svn_dso_initialize2(), except that if there is an error this
  62  * calls abort() instead of returning the error.
  63  *
  64  * @deprecated Provided for backwards compatibility with the 1.5 API.
  65  *
  66  * @since New in 1.4.
  67  */
  68 SVN_DEPRECATED
  69 void
  70 svn_dso_initialize(void);
  71
  72
  73 #if APR_HAS_DSO
  74
  75 /**
  76  * Attempt to load @a libname, returning it in @a *dso.
  77  *
  78  * If @a libname cannot be loaded set @a *dso to NULL and return
  79  * @c SVN_NO_ERROR.
  80  *
  81  * @note Due to pool lifetime issues DSOs are all loaded into a global
  82  *       pool, so you must be certain that there is a bounded number of
  83  *       them that will ever be loaded by the system, otherwise you will
  84  *       leak memory.
  85  *
  86  * @since New in 1.4.
  87  */
  88 svn_error_t *
  89 svn_dso_load(apr_dso_handle_t **dso,
  90              const char *libname);
  91
  92 #endif /* APR_HAS_DSO */
  93
  94
  95 #ifdef __cplusplus
  96 }
  97 #endif /* __cplusplus */
  98
  99 #endif /* SVN_DSO_H */