Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       5             :  * This Source Code Form is subject to the terms of the Mozilla Public
       6             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8             :  *
       9             :  * This file incorporates work covered by the following license notice:
      10             :  *
      11             :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12             :  *   contributor license agreements. See the NOTICE file distributed
      13             :  *   with this work for additional information regarding copyright
      14             :  *   ownership. The ASF licenses this file to you under the Apache
      15             :  *   License, Version 2.0 (the "License"); you may not use this file
      16             :  *   except in compliance with the License. You may obtain a copy of
      17             :  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
      18             :  */
      19             : 
      20             : /* make Python.h go first as a hack to work around _POSIX_C_SOURCE redefinition
      21             :    warnings: */
      22             : #include "Python.h"
      23             : 
      24             : #include "sal/config.h"
      25             : 
      26             : #include <stdlib.h>
      27             : #include <string.h>
      28             : 
      29             : #if defined LINUX && !defined __USE_GNU
      30             : #define __USE_GNU
      31             : #endif
      32             : #include <dlfcn.h>
      33             : 
      34             : #include "rtl/string.h"
      35             : 
      36             : /* A wrapper around libpyuno.so, making sure the latter is loaded RTLD_GLOBAL
      37             :    so that C++ exception handling works with old GCC versions (that determine
      38             :    RTTI identity by comparing string addresses rather than string content).
      39             : */
      40             : 
      41           4 : static void * load(void * address, char const * symbol) {
      42             :     Dl_info dl_info;
      43             :     char * slash;
      44             :     size_t len;
      45             :     char * libname;
      46             :     void * h;
      47             :     void * func;
      48           4 :     if (dladdr(address, &dl_info) == 0) {
      49           0 :         abort();
      50             :     }
      51           4 :     slash = strrchr(dl_info.dli_fname, '/');
      52           4 :     if (slash == NULL) {
      53           0 :         abort();
      54             :     }
      55           4 :     len = slash - dl_info.dli_fname + 1;
      56           4 :     libname = malloc(
      57             :         len + RTL_CONSTASCII_LENGTH(SAL_DLLPREFIX "pyuno" SAL_DLLEXTENSION)
      58             :         + 1);
      59           4 :     if (libname == 0) {
      60           0 :         abort();
      61             :     }
      62           4 :     strncpy(libname, dl_info.dli_fname, len);
      63           4 :     strcpy(libname + len, SAL_DLLPREFIX "pyuno" SAL_DLLEXTENSION);
      64           4 :     h = dlopen(libname, RTLD_LAZY | RTLD_GLOBAL);
      65           4 :     free(libname);
      66           4 :     if (h == NULL) {
      67           0 :         fprintf(stderr, "failed to load pyuno: '%s'\n", dlerror());
      68           0 :         abort();
      69             :     }
      70           4 :     func = dlsym(h, symbol);
      71           4 :     if (func == NULL) {
      72           0 :         dlclose(h);
      73           0 :         abort();
      74             :     }
      75           4 :     return func;
      76             : }
      77             : 
      78             : #if PY_MAJOR_VERSION >= 3
      79             : 
      80           4 : SAL_DLLPUBLIC_EXPORT PyObject * PyInit_pyuno(void) {
      81           4 :     return
      82           4 :         ((PyObject * (*)(void)) load((void *) &PyInit_pyuno, "PyInit_pyuno"))();
      83             : }
      84             : 
      85             : #else
      86             : 
      87             : SAL_DLLPUBLIC_EXPORT void initpyuno(void) {
      88             :     ((void (*)(void)) load((void *) &initpyuno, "initpyuno"))();
      89             : }
      90             : 
      91             : #endif
      92             : 
      93             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */