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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, &loca
lStatus)); | |
| 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", elapse
d); | |
| 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 } | |
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