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comparison: nsprpub/pr/tests/cvar.c
nsprpub/pr/tests/cvar.c
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| 1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 /*********************************************************************** | |
| 7 ** 1996 - Netscape Communications Corporation | |
| 8 ** | |
| 9 ** Name: cvar.c | |
| 10 ** | |
| 11 ** Description: Tests Condition Variable Operations | |
| 12 ** | |
| 13 ** Modification History: | |
| 14 ** 13-May-97 AGarcia- Converted the test to accomodate the debug_mode flag. | |
| 15 ** The debug mode will print all of the printfs associated with this test. | |
| 16 ** The regress mode will be the default mode. Since the regress tool limits | |
| 17 ** the output to a one line status:PASS or FAIL,all of the printf statements | |
| 18 ** have been handled with an if (debug_mode) statement. | |
| 19 ** 04-June-97 AGarcia removed the Test_Result function. Regress tool has been updated to | |
| 20 ** recognize the return code from tha main program. | |
| 21 ** 12-June-97 Revert to return code 0 and 1. | |
| 22 ***********************************************************************/ | |
| 23 | |
| 24 /*********************************************************************** | |
| 25 ** Includes | |
| 26 ***********************************************************************/ | |
| 27 | |
| 28 #include "nspr.h" | |
| 29 | |
| 30 /* Used to get the command line option */ | |
| 31 #include "plgetopt.h" | |
| 32 | |
| 33 #include <stdio.h> | |
| 34 #include <stdlib.h> | |
| 35 #include <string.h> | |
| 36 | |
| 37 PRMonitor *mon; | |
| 38 #define DEFAULT_COUNT 1000 | |
| 39 PRInt32 count = 0; | |
| 40 PRIntn debug_mode; | |
| 41 | |
| 42 #define kQSIZE 1 | |
| 43 | |
| 44 typedef struct { | |
| 45 PRLock *bufLock; | |
| 46 int startIdx; | |
| 47 int numFull; | |
| 48 PRCondVar *notFull; | |
| 49 PRCondVar *notEmpty; | |
| 50 void *data[kQSIZE]; | |
| 51 } CircBuf; | |
| 52 | |
| 53 static PRBool failed = PR_FALSE; | |
| 54 | |
| 55 /* | |
| 56 ** NewCB creates and initializes a new circular buffer. | |
| 57 */ | |
| 58 static CircBuf* NewCB(void) | |
| 59 { | |
| 60 CircBuf *cbp; | |
| 61 | |
| 62 cbp = PR_NEW(CircBuf); | |
| 63 if (cbp == NULL) | |
| 64 return (NULL); | |
| 65 | |
| 66 cbp->bufLock = PR_NewLock(); | |
| 67 cbp->startIdx = 0; | |
| 68 cbp->numFull = 0; | |
| 69 cbp->notFull = PR_NewCondVar(cbp->bufLock); | |
| 70 cbp->notEmpty = PR_NewCondVar(cbp->bufLock); | |
| 71 | |
| 72 return (cbp); | |
| 73 } | |
| 74 | |
| 75 /* | |
| 76 ** DeleteCB frees a circular buffer. | |
| 77 */ | |
| 78 static void DeleteCB(CircBuf *cbp) | |
| 79 { | |
| 80 PR_DestroyLock(cbp->bufLock); | |
| 81 PR_DestroyCondVar(cbp->notFull); | |
| 82 PR_DestroyCondVar(cbp->notEmpty); | |
| 83 PR_DELETE(cbp); | |
| 84 } | |
| 85 | |
| 86 | |
| 87 /* | |
| 88 ** PutCBData puts new data on the queue. If the queue is full, it waits | |
| 89 ** until there is room. | |
| 90 */ | |
| 91 static void PutCBData(CircBuf *cbp, void *data) | |
| 92 { | |
| 93 PR_Lock(cbp->bufLock); | |
| 94 /* wait while the buffer is full */ | |
| 95 while (cbp->numFull == kQSIZE) | |
| 96 PR_WaitCondVar(cbp->notFull,PR_INTERVAL_NO_TIMEOUT); | |
| 97 cbp->data[(cbp->startIdx + cbp->numFull) % kQSIZE] = data; | |
| 98 cbp->numFull += 1; | |
| 99 | |
| 100 /* let a waiting reader know that there is data */ | |
| 101 PR_NotifyCondVar(cbp->notEmpty); | |
| 102 PR_Unlock(cbp->bufLock); | |
| 103 | |
| 104 } | |
| 105 | |
| 106 | |
| 107 /* | |
| 108 ** GetCBData gets the oldest data on the queue. If the queue is empty, it waits | |
| 109 ** until new data appears. | |
| 110 */ | |
| 111 static void* GetCBData(CircBuf *cbp) | |
| 112 { | |
| 113 void *data; | |
| 114 | |
| 115 PR_Lock(cbp->bufLock); | |
| 116 /* wait while the buffer is empty */ | |
| 117 while (cbp->numFull == 0) | |
| 118 PR_WaitCondVar(cbp->notEmpty,PR_INTERVAL_NO_TIMEOUT); | |
| 119 data = cbp->data[cbp->startIdx]; | |
| 120 cbp->startIdx =(cbp->startIdx + 1) % kQSIZE; | |
| 121 cbp->numFull -= 1; | |
| 122 | |
| 123 /* let a waiting writer know that there is room */ | |
| 124 PR_NotifyCondVar(cbp->notFull); | |
| 125 PR_Unlock(cbp->bufLock); | |
| 126 | |
| 127 return (data); | |
| 128 } | |
| 129 | |
| 130 | |
| 131 /************************************************************************/ | |
| 132 | |
| 133 static int alive; | |
| 134 | |
| 135 static void PR_CALLBACK CXReader(void *arg) | |
| 136 { | |
| 137 CircBuf *cbp = (CircBuf *)arg; | |
| 138 PRInt32 i, n; | |
| 139 void *data; | |
| 140 | |
| 141 n = count / 2; | |
| 142 for (i = 0; i < n; i++) { | |
| 143 data = GetCBData(cbp); | |
| 144 if ((int)data != i) | |
| 145 if (debug_mode) printf("data mismatch at for i = %d usec\n", i); | |
| 146 } | |
| 147 | |
| 148 PR_EnterMonitor(mon); | |
| 149 --alive; | |
| 150 PR_Notify(mon); | |
| 151 PR_ExitMonitor(mon); | |
| 152 } | |
| 153 | |
| 154 static void PR_CALLBACK CXWriter(void *arg) | |
| 155 { | |
| 156 CircBuf *cbp = (CircBuf *)arg; | |
| 157 PRInt32 i, n; | |
| 158 | |
| 159 n = count / 2; | |
| 160 for (i = 0; i < n; i++) | |
| 161 PutCBData(cbp, (void *)i); | |
| 162 | |
| 163 PR_EnterMonitor(mon); | |
| 164 --alive; | |
| 165 PR_Notify(mon); | |
| 166 PR_ExitMonitor(mon); | |
| 167 } | |
| 168 | |
| 169 static void CondWaitContextSwitch(PRThreadScope scope1, PRThreadScope scope2) | |
| 170 { | |
| 171 PRThread *t1, *t2; | |
| 172 CircBuf *cbp; | |
| 173 | |
| 174 PR_EnterMonitor(mon); | |
| 175 | |
| 176 alive = 2; | |
| 177 | |
| 178 cbp = NewCB(); | |
| 179 | |
| 180 t1 = PR_CreateThread(PR_USER_THREAD, | |
| 181 CXReader, cbp, | |
| 182 PR_PRIORITY_NORMAL, | |
| 183 scope1, | |
| 184 PR_UNJOINABLE_THREAD, | |
| 185 0); | |
| 186 PR_ASSERT(t1); | |
| 187 t2 = PR_CreateThread(PR_USER_THREAD, | |
| 188 CXWriter, cbp, | |
| 189 PR_PRIORITY_NORMAL, | |
| 190 scope2, | |
| 191 PR_UNJOINABLE_THREAD, | |
| 192 0); | |
| 193 PR_ASSERT(t2); | |
| 194 | |
| 195 /* Wait for both of the threads to exit */ | |
| 196 while (alive) { | |
| 197 PR_Wait(mon, PR_INTERVAL_NO_TIMEOUT); | |
| 198 } | |
| 199 | |
| 200 DeleteCB(cbp); | |
| 201 | |
| 202 PR_ExitMonitor(mon); | |
| 203 } | |
| 204 | |
| 205 static void CondWaitContextSwitchUU(void) | |
| 206 { | |
| 207 CondWaitContextSwitch(PR_LOCAL_THREAD, PR_LOCAL_THREAD); | |
| 208 } | |
| 209 | |
| 210 static void CondWaitContextSwitchUK(void) | |
| 211 { | |
| 212 CondWaitContextSwitch(PR_LOCAL_THREAD, PR_GLOBAL_THREAD); | |
| 213 } | |
| 214 | |
| 215 static void CondWaitContextSwitchKK(void) | |
| 216 { | |
| 217 CondWaitContextSwitch(PR_GLOBAL_THREAD, PR_GLOBAL_THREAD); | |
| 218 } | |
| 219 | |
| 220 /************************************************************************/ | |
| 221 | |
| 222 static void Measure(void (*func)(void), const char *msg) | |
| 223 { | |
| 224 PRIntervalTime start, stop; | |
| 225 double d; | |
| 226 | |
| 227 start = PR_IntervalNow(); | |
| 228 (*func)(); | |
| 229 stop = PR_IntervalNow(); | |
| 230 | |
| 231 d = (double)PR_IntervalToMicroseconds(stop - start); | |
| 232 | |
| 233 if (debug_mode) printf("%40s: %6.2f usec\n", msg, d / count); | |
| 234 | |
| 235 if (0 == d) failed = PR_TRUE; | |
| 236 } | |
| 237 | |
| 238 static PRIntn PR_CALLBACK RealMain(int argc, char **argv) | |
| 239 { | |
| 240 /* The command line argument: -d is used to determine if the test is being run | |
| 241 in debug mode. The regress tool requires only one line output:PASS or FAIL. | |
| 242 All of the printfs associated with this test has been handled with a if (debug_mode) | |
| 243 test. | |
| 244 Usage: test_name [-d] [-c n] | |
| 245 */ | |
| 246 PLOptStatus os; | |
| 247 PLOptState *opt = PL_CreateOptState(argc, argv, "dc:"); | |
| 248 while (PL_OPT_EOL != (os = PL_GetNextOpt(opt))) | |
| 249 { | |
| 250 if (PL_OPT_BAD == os) continue; | |
| 251 switch (opt->option) | |
| 252 { | |
| 253 case 'd': /* debug mode */ | |
| 254 debug_mode = 1; | |
| 255 break; | |
| 256 case 'c': /* loop count */ | |
| 257 count = atoi(opt->value); | |
| 258 break; | |
| 259 default: | |
| 260 break; | |
| 261 } | |
| 262 } | |
| 263 PL_DestroyOptState(opt); | |
| 264 | |
| 265 if (0 == count) count = DEFAULT_COUNT; | |
| 266 | |
| 267 mon = PR_NewMonitor(); | |
| 268 | |
| 269 Measure(CondWaitContextSwitchUU, "cond var wait context switch- user/user"); | |
| 270 Measure(CondWaitContextSwitchUK, "cond var wait context switch- user/kernel"); | |
| 271 Measure(CondWaitContextSwitchKK, "cond var wait context switch- kernel/kernel"); | |
| 272 | |
| 273 PR_DestroyMonitor(mon); | |
| 274 | |
| 275 if (debug_mode) printf("%s\n", (failed) ? "FAILED" : "PASSED"); | |
| 276 | |
| 277 if(failed) | |
| 278 return 1; | |
| 279 else | |
| 280 return 0; | |
| 281 } | |
| 282 | |
| 283 | |
| 284 int main(int argc, char *argv[]) | |
| 285 { | |
| 286 PRIntn rv; | |
| 287 | |
| 288 PR_STDIO_INIT(); | |
| 289 rv = PR_Initialize(RealMain, argc, argv, 0); | |
| 290 return rv; | |
| 291 } /* main */ |
