The Tor Browser: comparison nsprpub/pr/tests/lockfile.c

--1:000000000000
+:db6c761c6f2e
+/* -*- 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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comparison: nsprpub/pr/tests/lockfile.c

nsprpub/pr/tests/lockfile.c