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
my_alloc(const void * context,size_t size)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
my_free(const void * context,void * mem)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
my_realloc(const void * context,void * mem,size_t size)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
main(int argc,const char * argv[])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