Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 252 insertions, 0 deletions

diff --git a/nsprpub/pr/tests/switch.c b/nsprpub/pr/tests/switch.c
new file mode 100644
index 0000000000..43db7888fb
--- /dev/null
+++ b/nsprpub/pr/tests/switch.c
@@ -0,0 +1,252 @@
+/* -*- 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:            switch.c
+** Description:     trying to time context switches
+*/
+
+#include "prinit.h"
+#include "prcvar.h"
+#include "prmem.h"
+#include "prinrval.h"
+#include "prlock.h"
+#include "prlog.h"
+#include "prthread.h"
+#include "prprf.h"
+
+#include "plerror.h"
+#include "plgetopt.h"
+
+#include "private/pprio.h"
+
+#include <stdlib.h>
+
+#define INNER_LOOPS 100
+#define DEFAULT_LOOPS 100
+#define DEFAULT_THREADS 10
+
+static PRFileDesc *debug_out = NULL;
+static PRBool debug_mode = PR_FALSE, verbosity = PR_FALSE, failed = PR_FALSE;
+
+typedef struct Shared
+{
+    PRLock *ml;
+    PRCondVar *cv;
+    PRBool twiddle;
+    PRThread *thread;
+    struct Shared *next;
+} Shared;
+
+static void Help(void)
+{
+    debug_out = PR_STDOUT;
+
+    PR_fprintf(
+        debug_out, "Usage: >./switch [-c n] [-t n] [-d] [-v] [-G] [-C n]\n");
+    PR_fprintf(
+        debug_out, "-c n\tloops at thread level (default: %d)\n", DEFAULT_LOOPS);
+    PR_fprintf(
+        debug_out, "-t n\tnumber of threads (default: %d)\n", DEFAULT_THREADS);
+    PR_fprintf(debug_out, "-d\tturn on debugging output (default: FALSE)\n");
+    PR_fprintf(debug_out, "-v\tturn on verbose output (default: FALSE)\n");
+    PR_fprintf(debug_out, "-G\tglobal threads only (default: FALSE)\n");
+    PR_fprintf(debug_out, "-C n\tconcurrency setting (default: 1)\n");
+}  /* Help */
+
+static void PR_CALLBACK Notified(void *arg)
+{
+    Shared *shared = (Shared*)arg;
+    PRStatus status = PR_SUCCESS;
+    while (PR_SUCCESS == status)
+    {
+        PR_Lock(shared->ml);
+        while (shared->twiddle && (PR_SUCCESS == status)) {
+            status = PR_WaitCondVar(shared->cv, PR_INTERVAL_NO_TIMEOUT);
+        }
+        if (verbosity) {
+            PR_fprintf(debug_out, "+");
+        }
+        shared->twiddle = PR_TRUE;
+        shared->next->twiddle = PR_FALSE;
+        PR_NotifyCondVar(shared->next->cv);
+        PR_Unlock(shared->ml);
+    }
+}  /* Notified */
+
+static Shared home;
+PRIntn PR_CALLBACK Switch(PRIntn argc, char **argv)
+{
+    PLOptStatus os;
+    PRStatus status;
+    PRBool help = PR_FALSE;
+    PRUintn concurrency = 1;
+    Shared *shared, *link;
+    PRIntervalTime timein, timeout;
+    PRThreadScope thread_scope = PR_LOCAL_THREAD;
+    PRUintn thread_count, inner_count, loop_count, average;
+    PRUintn thread_limit = DEFAULT_THREADS, loop_limit = DEFAULT_LOOPS;
+    PLOptState *opt = PL_CreateOptState(argc, argv, "hdvc:t:C:G");
+    while (PL_OPT_EOL != (os = PL_GetNextOpt(opt)))
+    {
+        if (PL_OPT_BAD == os) {
+            continue;
+        }
+        switch (opt->option)
+        {
+            case 'v':  /* verbose mode */
+                verbosity = PR_TRUE;
+            case 'd':  /* debug mode */
+                debug_mode = PR_TRUE;
+                break;
+            case 'c':  /* loop counter */
+                loop_limit = atoi(opt->value);
+                break;
+            case 't':  /* thread limit */
+                thread_limit = atoi(opt->value);
+                break;
+            case 'C':  /* Concurrency limit */
+                concurrency = atoi(opt->value);
+                break;
+            case 'G':  /* global threads only */
+                thread_scope = PR_GLOBAL_THREAD;
+                break;
+            case 'h':  /* help message */
+                Help();
+                help = PR_TRUE;
+                break;
+            default:
+                break;
+        }
+    }
+    PL_DestroyOptState(opt);
+
+    if (help) {
+        return -1;
+    }
+
+    if (PR_TRUE == debug_mode)
+    {
+        debug_out = PR_STDOUT;
+        PR_fprintf(debug_out, "Test parameters\n");
+        PR_fprintf(debug_out, "\tThreads involved: %d\n", thread_limit);
+        PR_fprintf(debug_out, "\tIteration limit: %d\n", loop_limit);
+        PR_fprintf(debug_out, "\tConcurrency: %d\n", concurrency);
+        PR_fprintf(
+            debug_out, "\tThread type: %s\n",
+            (PR_GLOBAL_THREAD == thread_scope) ? "GLOBAL" : "LOCAL");
+    }
+
+    PR_SetConcurrency(concurrency);
+
+    link = &home;
+    home.ml = PR_NewLock();
+    home.cv = PR_NewCondVar(home.ml);
+    home.twiddle = PR_FALSE;
+    home.next = NULL;
+
+    timeout = 0;
+
+    for (thread_count = 1; thread_count <= thread_limit; ++thread_count)
+    {
+        shared = PR_NEWZAP(Shared);
+
+        shared->ml = home.ml;
+        shared->cv = PR_NewCondVar(home.ml);
+        shared->twiddle = PR_TRUE;
+        shared->next = link;
+        link = shared;
+
+        shared->thread = PR_CreateThread(
+                             PR_USER_THREAD, Notified, shared,
+                             PR_PRIORITY_HIGH, thread_scope,
+                             PR_JOINABLE_THREAD, 0);
+        PR_ASSERT(shared->thread != NULL);
+        if (NULL == shared->thread) {
+            failed = PR_TRUE;
+        }
+    }
+
+    for (loop_count = 1; loop_count <= loop_limit; ++loop_count)
+    {
+        timein = PR_IntervalNow();
+        for (inner_count = 0; inner_count < INNER_LOOPS; ++inner_count)
+        {
+            PR_Lock(home.ml);
+            home.twiddle = PR_TRUE;
+            shared->twiddle = PR_FALSE;
+            PR_NotifyCondVar(shared->cv);
+            while (home.twiddle)
+            {
+                status = PR_WaitCondVar(home.cv, PR_INTERVAL_NO_TIMEOUT);
+                if (PR_FAILURE == status) {
+                    failed = PR_TRUE;
+                }
+            }
+            PR_Unlock(home.ml);
+        }
+        timeout += (PR_IntervalNow() - timein);
+    }
+
+    if (debug_mode)
+    {
+        average = PR_IntervalToMicroseconds(timeout)
+                  / (INNER_LOOPS * loop_limit * thread_count);
+        PR_fprintf(
+            debug_out, "Average switch times %d usecs for %d threads\n",
+            average, thread_limit);
+    }
+
+    link = shared;
+    for (thread_count = 1; thread_count <= thread_limit; ++thread_count)
+    {
+        if (&home == link) {
+            break;
+        }
+        status = PR_Interrupt(link->thread);
+        if (PR_SUCCESS != status)
+        {
+            failed = PR_TRUE;
+            if (debug_mode) {
+                PL_FPrintError(debug_out, "Failed to interrupt");
+            }
+        }
+        link = link->next;
+    }
+
+    for (thread_count = 1; thread_count <= thread_limit; ++thread_count)
+    {
+        link = shared->next;
+        status = PR_JoinThread(shared->thread);
+        if (PR_SUCCESS != status)
+        {
+            failed = PR_TRUE;
+            if (debug_mode) {
+                PL_FPrintError(debug_out, "Failed to join");
+            }
+        }
+        PR_DestroyCondVar(shared->cv);
+        PR_DELETE(shared);
+        if (&home == link) {
+            break;
+        }
+        shared = link;
+    }
+    PR_DestroyCondVar(home.cv);
+    PR_DestroyLock(home.ml);
+
+    PR_fprintf(PR_STDOUT, ((failed) ? "FAILED\n" : "PASSED\n"));
+    return ((failed) ? 1 : 0);
+}  /* Switch */
+
+int main(int argc, char **argv)
+{
+    PRIntn result;
+    PR_STDIO_INIT();
+    result = PR_Initialize(Switch, argc, argv, 0);
+    return result;
+}  /* main */
+
+/* switch.c */