Adding upstream version 86.0.1.upstream/86.0.1upstream

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

1 files changed, 248 insertions, 0 deletions

diff --git a/nsprpub/pr/src/cplus/tests/switch.cpp b/nsprpub/pr/src/cplus/tests/switch.cpp
new file mode 100644
index 0000000000..00de8e3064
--- /dev/null
+++ b/nsprpub/pr/src/cplus/tests/switch.cpp
@@ -0,0 +1,248 @@
+/* -*- 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.cpp
+** Description:     trying to time context switches
+*/
+
+#include "rccv.h"
+#include "rcinrval.h"
+#include "rclock.h"
+#include "rcthread.h"
+
+#include <prio.h>
+#include <prlog.h>
+#include <prprf.h>
+#include <plerror.h>
+#include <plgetopt.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;
+
+class Home: public RCCondition
+{
+public:
+    virtual ~Home();
+    Home(Home *link, RCLock* ml);
+
+public:
+    Home *next;
+    RCLock* ml;
+    PRBool twiddle;
+};  /* Home */
+
+Home::~Home() { }
+
+Home::Home(Home *link, RCLock* lock): RCCondition(lock)
+{
+    ml = lock;
+    next = link;
+    twiddle = PR_FALSE;
+}  /* Home::Home */
+
+class Shared: public Home, public RCThread
+{
+public:
+    Shared(RCThread::Scope scope, Home* link, RCLock* ml);
+
+private:
+    ~Shared();
+    void RootFunction();
+};  /* Shared */
+
+Shared::Shared(RCThread::Scope scope, Home* link, RCLock* lock):
+    Home(link, lock), RCThread(scope, RCThread::joinable) { }
+
+Shared::~Shared() { }
+
+void Shared::RootFunction()
+{
+    PRStatus status = PR_SUCCESS;
+    while (PR_SUCCESS == status)
+    {
+        RCEnter entry(ml);
+        while (twiddle && (PR_SUCCESS == status)) {
+            status = Wait();
+        }
+        if (verbosity) {
+            PR_fprintf(debug_out, "+");
+        }
+        twiddle = PR_TRUE;
+        next->twiddle = PR_FALSE;
+        next->Notify();
+    }
+}  /* Shared::RootFunction */
+
+static void Help(void)
+{
+    debug_out = PR_STDOUT;
+
+    PR_fprintf(
+        debug_out, "Usage: >./switch [-d] [-c n] [-t n] [-T n] [-G]\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 n\tglobal threads only (default: FALSE)\n");
+    PR_fprintf(debug_out, "-C n\tconcurrency setting (default: 1)\n");
+}  /* Help */
+
+PRIntn main(PRIntn argc, char **argv)
+{
+    PLOptStatus os;
+    PRStatus status;
+    PRBool help = PR_FALSE;
+    PRUintn concurrency = 1;
+    RCThread::Scope thread_scope = RCThread::local;
+    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 = RCThread::global;
+                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");
+    }
+
+    /*
+    ** The interesting part starts here
+    */
+    RCLock lock;
+    Shared* shared;
+    Home home(NULL, &lock);
+    Home* link = &home;
+    RCInterval timein, timeout = 0;
+
+    /* Build up the string of objects */
+    for (thread_count = 1; thread_count <= thread_limit; ++thread_count)
+    {
+        shared = new Shared(thread_scope, link, &lock);
+        shared->Start();  /* make it run */
+        link = (Home*)shared;
+    }
+
+    /* Pass the message around the horn a few times */
+    for (loop_count = 1; loop_count <= loop_limit; ++loop_count)
+    {
+        timein.SetToNow();
+        for (inner_count = 0; inner_count < INNER_LOOPS; ++inner_count)
+        {
+            RCEnter entry(&lock);
+            home.twiddle = PR_TRUE;
+            shared->twiddle = PR_FALSE;
+            shared->Notify();
+            while (home.twiddle)
+            {
+                failed = (PR_FAILURE == home.Wait()) ? PR_TRUE : PR_FALSE;
+            }
+        }
+        timeout += (RCInterval(RCInterval::now) - timein);
+    }
+
+    /* Figure out how well we did */
+    if (debug_mode)
+    {
+        average = timeout.ToMicroseconds()
+                  / (INNER_LOOPS * loop_limit * thread_count);
+        PR_fprintf(
+            debug_out, "Average switch times %d usecs for %d threads\n",
+            average, thread_limit);
+    }
+
+    /* Start reclamation process */
+    link = shared;
+    for (thread_count = 1; thread_count <= thread_limit; ++thread_count)
+    {
+        if (&home == link) {
+            break;
+        }
+        status = ((Shared*)link)->Interrupt();
+        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 = shared->Join();
+        if (PR_SUCCESS != status)
+        {
+            failed = PR_TRUE;
+            if (debug_mode) {
+                PL_FPrintError(debug_out, "Failed to join");
+            }
+        }
+        if (&home == link) {
+            break;
+        }
+        shared = (Shared*)link;
+    }
+
+    PR_fprintf(PR_STDOUT, ((failed) ? "FAILED\n" : "PASSED\n"));
+
+    failed |= (PR_SUCCESS == RCPrimordialThread::Cleanup());
+
+    return ((failed) ? 1 : 0);
+}  /* main */
+
+/* switch.c */