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Diffstat (limited to 'nsprpub/pr/tests/lockfile.c')
| -rw-r--r-- | nsprpub/pr/tests/lockfile.c | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/nsprpub/pr/tests/lockfile.c b/nsprpub/pr/tests/lockfile.c new file mode 100644 index 0000000000..9c2de8c8f3 --- /dev/null +++ b/nsprpub/pr/tests/lockfile.c @@ -0,0 +1,229 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +/* +** File: lockfile.c +** Purpose: test basic locking functions +** Just because this times stuff, don't think its a perforamnce +** test!!! +** +** Modification History: +** 19-May-97 AGarcia- Converted the test to accomodate the debug_mode flag. +** The debug mode will print all of the printfs associated with this test. +** The regress mode will be the default mode. Since the regress tool limits +** the output to a one line status:PASS or FAIL,all of the printf statements +** have been handled with an if (debug_mode) statement. +** 04-June-97 AGarcia removed the Test_Result function. Regress tool has been updated to +** recognize the return code from tha main program. +***********************************************************************/ +/*********************************************************************** +** Includes +***********************************************************************/ +/* Used to get the command line option */ +#include "plgetopt.h" + +#include "prcmon.h" +#include "prerror.h" +#include "prinit.h" +#include "prinrval.h" +#include "prlock.h" +#include "prlog.h" +#include "prmon.h" +#include "prthread.h" +#include "prtypes.h" + +#include "private/pprio.h" + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +PRIntn failed_already=0; +PRIntn debug_mode; + +const static PRIntervalTime contention_interval = 50; + +typedef struct LockContentious_s { + PRLock *ml; + PRInt32 loops; + PRIntervalTime overhead; + PRIntervalTime interval; +} LockContentious_t; + +#define LOCKFILE "prlock.fil" + + + +static PRIntervalTime NonContentiousLock(PRInt32 loops) +{ + PRFileDesc *_lockfile; + while (loops-- > 0) + { + _lockfile = PR_Open(LOCKFILE, PR_CREATE_FILE|PR_RDWR, 0666); + if (!_lockfile) { + if (debug_mode) printf( + "could not create lockfile: %d [%d]\n", + PR_GetError(), PR_GetOSError()); + return PR_INTERVAL_NO_TIMEOUT; + } + PR_LockFile(_lockfile); + PR_UnlockFile(_lockfile); + PR_Close(_lockfile); + } + return 0; +} /* NonContentiousLock */ + +static void PR_CALLBACK LockContender(void *arg) +{ + LockContentious_t *contention = (LockContentious_t*)arg; + PRFileDesc *_lockfile; + while (contention->loops-- > 0) + { + _lockfile = PR_Open(LOCKFILE, PR_CREATE_FILE|PR_RDWR, 0666); + if (!_lockfile) { + if (debug_mode) printf( + "could not create lockfile: %d [%d]\n", + PR_GetError(), PR_GetOSError()); + break; + } + PR_LockFile(_lockfile); + PR_Sleep(contention->interval); + PR_UnlockFile(_lockfile); + PR_Close(_lockfile); + } + +} /* LockContender */ + +/* +** Win16 requires things passed to Threads not be on the stack +*/ +static LockContentious_t contention; + +static PRIntervalTime ContentiousLock(PRInt32 loops) +{ + PRStatus status; + PRThread *thread = NULL; + PRIntervalTime overhead, timein = PR_IntervalNow(); + + contention.loops = loops; + contention.overhead = 0; + contention.ml = PR_NewLock(); + contention.interval = contention_interval; + thread = PR_CreateThread( + PR_USER_THREAD, LockContender, &contention, + PR_PRIORITY_LOW, PR_LOCAL_THREAD, PR_JOINABLE_THREAD, 0); + PR_ASSERT(thread != NULL); + + overhead = PR_IntervalNow() - timein; + + while (contention.loops > 0) + { + PR_Lock(contention.ml); + contention.overhead += contention.interval; + PR_Sleep(contention.interval); + PR_Unlock(contention.ml); + } + + timein = PR_IntervalNow(); + status = PR_JoinThread(thread); + PR_DestroyLock(contention.ml); + overhead += (PR_IntervalNow() - timein); + return overhead + contention.overhead; +} /* ContentiousLock */ + +static PRIntervalTime Test( + const char* msg, PRIntervalTime (*test)(PRInt32 loops), + PRInt32 loops, PRIntervalTime overhead) +{ + /* + * overhead - overhead not measured by the test. + * duration - wall clock time it took to perform test. + * predicted - extra time test says should not be counted + * + * Time accountable to the test is duration - overhead - predicted + * All times are Intervals and accumulated for all iterations. + */ + PRFloat64 elapsed; + PRIntervalTime accountable, duration; + PRUintn spaces = strlen(msg); + PRIntervalTime timeout, timein = PR_IntervalNow(); + PRIntervalTime predicted = test(loops); + timeout = PR_IntervalNow(); + duration = timeout - timein; + accountable = duration - predicted; + accountable -= overhead; + elapsed = (PRFloat64)PR_IntervalToMicroseconds(accountable); + if (debug_mode) printf("%s:", msg); + while (spaces++ < 50) if (debug_mode) printf(" "); + if ((PRInt32)accountable < 0) { + if (debug_mode) printf("*****.** usecs/iteration\n"); + } else { + if (debug_mode) printf("%8.2f usecs/iteration\n", elapsed/loops); + } + return duration; +} /* Test */ + +int main(int argc, char **argv) +{ + PRIntervalTime duration; + PRUint32 cpu, cpus = 2; + PRInt32 loops = 100; + + + /* The command line argument: -d is used to determine if the test is being run + in debug mode. The regress tool requires only one line output:PASS or FAIL. + All of the printfs associated with this test has been handled with a if (debug_mode) + test. + Usage: test_name -d + */ + PLOptStatus os; + PLOptState *opt = PL_CreateOptState(argc, argv, "d:"); + while (PL_OPT_EOL != (os = PL_GetNextOpt(opt))) + { + if (PL_OPT_BAD == os) continue; + switch (opt->option) + { + case 'd': /* debug mode */ + debug_mode = 1; + break; + default: + break; + } + } + PL_DestroyOptState(opt); + + /* main test */ + + PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 0); + PR_STDIO_INIT(); + + if (argc > 1) loops = atoi(argv[1]); + if (loops == 0) loops = 100; + if (debug_mode) printf("Lock: Using %d loops\n", loops); + + cpus = (argc < 3) ? 2 : atoi(argv[2]); + if (cpus == 0) cpus = 2; + if (debug_mode) printf("Lock: Using %d cpu(s)\n", cpus); + + + for (cpu = 1; cpu <= cpus; ++cpu) + { + if (debug_mode) printf("\nLockFile: Using %d CPU(s)\n", cpu); + PR_SetConcurrency(cpu); + + duration = Test("LockFile non-contentious locking/unlocking", NonContentiousLock, loops, 0); + (void)Test("LockFile contentious locking/unlocking", ContentiousLock, loops, duration); + } + + PR_Delete(LOCKFILE); /* try to get rid of evidence */ + + if (debug_mode) printf("%s: test %s\n", "Lock(mutex) test", ((failed_already) ? "failed" : "passed")); + if(failed_already) + return 1; + else + return 0; +} /* main */ + +/* testlock.c */ |