icuSources/common/uinit.c

   1 /*
   2 ******************************************************************************
   3 *                                                                            *
   4 * Copyright (C) 2001-2011, International Business Machines                   *
   5 *                Corporation and others. All Rights Reserved.                *
   6 *                                                                            *
   7 ******************************************************************************
   8 *   file name:  uinit.c
   9 *   encoding:   US-ASCII
  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.h"
  23 #include "ucnv_io.h"
  24 #include "umutex.h"
  25 #include "utracimp.h"
  26
  27 /*
  28  * ICU Initialization Function. Need not be called.
  29  */
  30 U_CAPI void U_EXPORT2
  31 u_init(UErrorCode *status) {
  32     UTRACE_ENTRY_OC(UTRACE_U_INIT);
  33     /* initialize plugins */
  34     uplug_init(status);
  35
  36     umtx_lock(&gICUInitMutex);
  37     if (gICUInitialized || U_FAILURE(*status)) {
  38         umtx_unlock(&gICUInitMutex);
  39         UTRACE_EXIT_STATUS(*status);
  40         return;
  41     }
  42
  43     /*
  44      * 2005-may-02
  45      *
  46      * ICU4C 3.4 (jitterbug 4497) hardcodes the data for Unicode character
  47      * properties for APIs that want to be fast.
  48      * Therefore, we need not load them here nor check for errors.
  49      * Instead, we load the converter alias table to see if any ICU data
  50      * is available.
  51      * Users should really open the service objects they need and check
  52      * for errors there, to make sure that the actual items they need are
  53      * available.
  54      */
  55 #if !UCONFIG_NO_CONVERSION
  56     ucnv_io_countKnownConverters(status);
  57 #endif
  58
  59     gICUInitialized = TRUE;    /* TODO:  don't set if U_FAILURE? */
  60     umtx_unlock(&gICUInitMutex);
  61     UTRACE_EXIT_STATUS(*status);
  62 }