src/init_globals.c

   1 /* This file is part of the YAZ toolkit.
   2  * Copyright (C) Index Data
   3  * See the file LICENSE for details.
   4  */
   5
   6 /**
   7  * \file init_globals.c
   8  * \brief Initialize global things
   9  */
  10
  11 #if HAVE_CONFIG_H
  12 #include <config.h>
  13 #endif
  14
  15 #include <yaz/log.h>
  16
  17 #if YAZ_POSIX_THREADS
  18 #include <pthread.h>
  19 #endif
  20 #include <errno.h>
  21
  22 #if HAVE_GNUTLS_H
  23 #include <gnutls/gnutls.h>
  24 #endif
  25
  26 #if HAVE_GCRYPT_H
  27 #include <gcrypt.h>
  28 #endif
  29
  30 #if YAZ_HAVE_XML2
  31 #include <libxml/parser.h>
  32 #endif
  33
  34 #if YAZ_HAVE_XSLT
  35 #include <libxslt/xslt.h>
  36 #endif
  37
  38 #if YAZ_HAVE_EXSLT
  39 #include <libexslt/exslt.h>
  40 #endif
  41
  42 static int yaz_init_flag = 0;
  43 #if YAZ_POSIX_THREADS
  44 static pthread_mutex_t yaz_init_mutex = PTHREAD_MUTEX_INITIALIZER;
  45 #endif
  46
  47 extern void yaz_log_init_globals(void);
  48 extern void yaz_log_deinit_globals(void);
  49
  50 #if HAVE_GCRYPT_H
  51 GCRY_THREAD_OPTION_PTHREAD_IMPL;
  52 #endif
  53
  54 void yaz_init_globals(void)
  55 {
  56     if (yaz_init_flag)
  57         return;
  58 #if YAZ_POSIX_THREADS
  59     pthread_mutex_lock(&yaz_init_mutex);
  60 #endif
  61     if (!yaz_init_flag)
  62     {
  63         yaz_log_init_globals();
  64 #if HAVE_GCRYPT_H
  65         /* POSIX threads locking. In case gnutls_global_init do not override */
  66         gcry_control(GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread);
  67 #endif
  68 #if HAVE_GNUTLS_H
  69         gnutls_global_init();
  70 #endif
  71 #if HAVE_GCRYPT_H
  72         /* most likely, GnuTLS has already initialized libgcrypt */
  73         if (gcry_control(GCRYCTL_ANY_INITIALIZATION_P) == 0)
  74         {
  75             gcry_control(GCRYCTL_INITIALIZATION_FINISHED, NULL, 0);
  76         }
  77 #endif
  78 #if YAZ_HAVE_XML2
  79         xmlInitParser();
  80 #endif
  81 #if YAZ_HAVE_XSLT
  82         xsltInit();
  83 #endif
  84 #if YAZ_HAVE_EXSLT
  85         exsltRegisterAll();
  86 #endif
  87         yaz_init_flag = 1; /* must be last, before unlocking */
  88     }
  89 #if YAZ_POSIX_THREADS
  90     pthread_mutex_unlock(&yaz_init_mutex);
  91 #endif
  92 }
  93
  94 void yaz_deinit_globals(void)
  95 {
  96     if (!yaz_init_flag)
  97         return;
  98 #if YAZ_POSIX_THREADS
  99     pthread_mutex_lock(&yaz_init_mutex);
 100 #endif
 101     if (yaz_init_flag)
 102     {
 103         yaz_log_deinit_globals();
 104 #if HAVE_GNUTLS_H
 105         gnutls_global_deinit();
 106 #endif
 107 #if YAZ_HAVE_XSLT
 108         xsltCleanupGlobals();
 109 #endif
 110 #if YAZ_HAVE_XML2
 111         xmlCleanupParser();
 112 #endif
 113         yaz_init_flag = 0;
 114     }
 115 #if YAZ_POSIX_THREADS
 116     pthread_mutex_unlock(&yaz_init_mutex);
 117 #endif
 118 }
 119
 120 /*
 121  * Local variables:
 122  * c-basic-offset: 4
 123  * c-file-style: "Stroustrup"
 124  * indent-tabs-mode: nil
 125  * End:
 126  * vim: shiftwidth=4 tabstop=8 expandtab
 127  */
 128