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