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-rw-r--r--nsprpub/pr/tests/lockfile.c255
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diff --git a/nsprpub/pr/tests/lockfile.c b/nsprpub/pr/tests/lockfile.c
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+/* -*- 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 */
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