icuSources/common/uinit.cpp

   1 // © 2016 and later: Unicode, Inc. and others.
   2 // License & terms of use: http://www.unicode.org/copyright.html
   3 /*
   4 ******************************************************************************
   5 * Copyright (C) 2001-2015, International Business Machines
   6 *                Corporation and others. All Rights Reserved.
   7 ******************************************************************************
   8 *   file name:  uinit.cpp
   9 *   encoding:   UTF-8
  10 *   tab size:   8 (not used)
  11 *   indentation:4
  12 *
  13 *   created on: 2001July05
  14 *   created by: George Rhoten
  15 */
  16
  17 #include "unicode/utypes.h"
  18 #include "unicode/icuplug.h"
  19 #include "unicode/uclean.h"
  20 #include "cmemory.h"
  21 #include "icuplugimp.h"
  22 #include "ucln_cmn.h"
  23 #include "ucnv_io.h"
  24 #include "umutex.h"
  25 #include "utracimp.h"
  26
  27 U_NAMESPACE_BEGIN
  28
  29 static UInitOnce gICUInitOnce = U_INITONCE_INITIALIZER;
  30
  31 static UBool U_CALLCONV uinit_cleanup() {
  32     gICUInitOnce.reset();
  33     return TRUE;
  34 }
  35
  36 static void U_CALLCONV
  37 initData(UErrorCode &status)
  38 {
  39 #if UCONFIG_ENABLE_PLUGINS
  40     /* initialize plugins */
  41     uplug_init(&status);
  42 #endif
  43
  44 #if !UCONFIG_NO_CONVERSION
  45     /*
  46      * 2005-may-02
  47      *
  48      * ICU4C 3.4 (jitterbug 4497) hardcodes the data for Unicode character
  49      * properties for APIs that want to be fast.
  50      * Therefore, we need not load them here nor check for errors.
  51      * Instead, we load the converter alias table to see if any ICU data
  52      * is available.
  53      * Users should really open the service objects they need and check
  54      * for errors there, to make sure that the actual items they need are
  55      * available.
  56      */
  57     ucnv_io_countKnownConverters(&status);
  58 #endif
  59     ucln_common_registerCleanup(UCLN_COMMON_UINIT, uinit_cleanup);
  60 }
  61
  62 U_NAMESPACE_END
  63
  64 U_NAMESPACE_USE
  65
  66 /*
  67  * ICU Initialization Function. Need not be called.
  68  */
  69 U_CAPI void U_EXPORT2
  70 u_init(UErrorCode *status) {
  71     UTRACE_ENTRY_OC(UTRACE_U_INIT);
  72     umtx_initOnce(gICUInitOnce, &initData, *status);
  73     UTRACE_EXIT_STATUS(*status);
  74 }