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      1 /*
      2 *******************************************************************************
      3 *
      4 *    2016 and later: Unicode, Inc. and others.
      5 *   License & terms of use: http://www.unicode.org/copyright.html#License
      6 *
      7 *******************************************************************************
      8 *******************************************************************************
      9 *
     10 *   Copyright (C) 2009, International Business Machines
     11 *   Corporation and others.  All Rights Reserved.
     12 *
     13 *******************************************************************************
     14 *   file name:  ucnvavailperf.cpp
     15 *   encoding:   UTF-8
     16 *   tab size:   8 (not used)
     17 *   indentation:4
     18 *
     19 *   created on: 2009apr06
     20 *   created by: Markus W. Scherer
     21 *
     22 *   Test performance (time & memory) of ucnv_countAvailable(),
     23 *   for a before-and-after comparison of
     24 *   ticket 6441: make ucnv_countAvailable() not fully load converters
     25 *
     26 *   Run with one optional command-line argument:
     27 *   You can specify the path to the ICU data directory.
     28 *
     29 *   I built the common (icuuc) library with the following modification,
     30 *   switching between old (pre-ticket-6441) behavior of actually
     31 *   trying to load all converters and new behavior of just doing enough
     32 *   to test availability.
     33 *
     34 *   Code in the ucnv_bld.c haveAvailableConverterList() function:
     35 #if 0
     36             // old pre-ticket-6441 behavior
     37             ucnv_close(ucnv_createConverter(&tempConverter, converterName, &localStatus));
     38             if (U_SUCCESS(localStatus)) {
     39 #else
     40             // new behavior
     41             if (ucnv_canCreateConverter(converterName, &localStatus)) {
     42 #endif
     43 */
     44 
     45 #include <malloc.h>
     46 #include <stdio.h>
     47 #include "unicode/utypes.h"
     48 #include "unicode/putil.h"
     49 #include "unicode/uclean.h"
     50 #include "unicode/ucnv.h"
     51 #include "unicode/utimer.h"
     52 
     53 static size_t icuMemUsage = 0;
     54 
     55 U_CDECL_BEGIN
     56 
     57 void *U_CALLCONV
     58 my_alloc(const void *context, size_t size) {
     59     size_t *p = (size_t *)malloc(size + sizeof(size_t));
     60     if (p != NULL) {
     61         icuMemUsage += size;
     62         *p = size;
     63         return p + 1;
     64     } else {
     65         return NULL;
     66     }
     67 }
     68 
     69 void U_CALLCONV
     70 my_free(const void *context, void *mem) {
     71     if (mem != NULL) {
     72         const size_t *p = (const size_t *)mem - 1;
     73         icuMemUsage -= *p;
     74         free((void *)p);
     75     }
     76 }
     77 
     78 // Not used in the common library.
     79 void *U_CALLCONV
     80 my_realloc(const void *context, void *mem, size_t size) {
     81     my_free(context, mem);
     82     return NULL;
     83 }
     84 
     85 U_CDECL_END
     86 
     87 int main(int argc, const char *argv[]) {
     88     UErrorCode errorCode = U_ZERO_ERROR;
     89 
     90     // Hook in our own memory allocation functions so that we can measure
     91     // the memory usage.
     92     u_setMemoryFunctions(NULL, my_alloc, my_realloc, my_free, &errorCode);
     93     if(U_FAILURE(errorCode)) {
     94         fprintf(stderr,
     95                 "u_setMemoryFunctions() failed - %s\n",
     96                 u_errorName(errorCode));
     97         return errorCode;
     98     }
     99 
    100     if (argc > 1) {
    101         printf("u_setDataDirectory(%s)\n", argv[1]);
    102         u_setDataDirectory(argv[1]);
    103     }
    104 
    105     // Preload a purely algorithmic converter via an alias,
    106     // to make sure that relevant data can be loaded and to set up
    107     // caches and such that are needed even if none of the data-driven
    108     // converters needs to be loaded.
    109     ucnv_close(ucnv_open("ibm-1208", &errorCode));
    110     if(U_FAILURE(errorCode)) {
    111         fprintf(stderr,
    112                 "unable to open UTF-8 converter via an alias - %s\n",
    113                 u_errorName(errorCode));
    114         return errorCode;
    115     }
    116 
    117     printf("memory usage after ucnv_open(ibm-1208): %lu\n", (long)icuMemUsage);
    118 
    119     UTimer start_time;
    120     utimer_getTime(&start_time);
    121     // Measure the time to find out the list of actually available converters.
    122     int32_t count = ucnv_countAvailable();
    123     double elapsed = utimer_getElapsedSeconds(&start_time);
    124     printf("ucnv_countAvailable() reports that %d converters are available.\n", count);
    125     printf("ucnv_countAvailable() took %g seconds to figure this out.\n", elapsed);
    126     printf("memory usage after ucnv_countAvailable(): %lu\n", (long)icuMemUsage);
    127 
    128     ucnv_flushCache();
    129     printf("memory usage after ucnv_flushCache(): %lu\n", (long)icuMemUsage);
    130 
    131     u_cleanup();
    132     printf("memory usage after u_cleanup(): %lu\n", (long)icuMemUsage);
    133 
    134     return 0;
    135 }
    136