Check in the pristine copy of ICU 4.6...

icu46/source/test/threadtest/stringtest.cpp

+//
+//********************************************************************
+//   Copyright (C) 2002, International Business Machines
+//   Corporation and others.  All Rights Reserved.
+//********************************************************************
+//
+// File stringtest.cpp
+//
+
+#include "threadtest.h"
+#include "unicode/unistr.h"
+#include "stdio.h"
+
+class StringThreadTest: public AbstractThreadTest {
+public:
+                    StringThreadTest();
+    virtual        ~StringThreadTest();
+    virtual void    check();
+    virtual void    runOnce();
+            void    makeStringCopies(int recursionCount);
+
+private:
+    UnicodeString   *fCleanStrings;
+    UnicodeString   *fSourceStrings;
+};
+
+StringThreadTest::StringThreadTest() {
+    // cleanStrings and sourceStrings are separately initialized to the same values.
+    // cleanStrings are never touched after in any remotely unsafe way.
+    // sourceStrings are copied during the test, which will run their buffer's reference
+    //    counts all over the place.
+    fCleanStrings     = new UnicodeString[5];
+    fSourceStrings    = new UnicodeString[5];
+
+    fCleanStrings[0]  = "When sorrows come, they come not single spies, but in batallions.";
+    fSourceStrings[0] = "When sorrows come, they come not single spies, but in batallions.";
+    fCleanStrings[1]  = "Away, you scullion! You rampallion! You fustilarion! I'll tickle your catastrophe!";
+    fSourceStrings[1] = "Away, you scullion! You rampallion! You fustilarion! I'll tickle your catastrophe!"; 
+    fCleanStrings[2]  = "hot";
+    fSourceStrings[2] = "hot"; 
+    fCleanStrings[3]  = "";
+    fSourceStrings[3] = ""; 
+    fCleanStrings[4]  = "Tomorrow, and tomorrow, and tomorrow,\n"
+                        "Creeps in this petty pace from day to day\n"
+                        "To the last syllable of recorded time;\n"
+                        "And all our yesterdays have lighted fools \n"
+                        "The way to dusty death. Out, out brief candle!\n"
+                        "Life's but a walking shadow, a poor player\n"
+                        "That struts and frets his hour upon the stage\n"
+                        "And then is heard no more. It is a tale\n"
+                        "Told by and idiot, full of sound and fury,\n"
+                        "Signifying nothing.\n";
+    fSourceStrings[4] = "Tomorrow, and tomorrow, and tomorrow,\n"
+                        "Creeps in this petty pace from day to day\n"
+                        "To the last syllable of recorded time;\n"
+                        "And all our yesterdays have lighted fools \n"
+                        "The way to dusty death. Out, out brief candle!\n"
+                        "Life's but a walking shadow, a poor player\n"
+                        "That struts and frets his hour upon the stage\n"
+                        "And then is heard no more. It is a tale\n"
+                        "Told by and idiot, full of sound and fury,\n"
+                        "Signifying nothing.\n";
+};
+
+
+StringThreadTest::~StringThreadTest() {
+    delete [] fCleanStrings;
+    delete [] fSourceStrings;
+}
+
+
+void   StringThreadTest::runOnce() {
+    makeStringCopies(25);
+}
+
+void   StringThreadTest::makeStringCopies(int recursionCount) {
+    UnicodeString firstGeneration[5];
+    UnicodeString secondGeneration[5];
+    UnicodeString thirdGeneration[5];
+    UnicodeString fourthGeneration[5];
+
+    // Make four generations of copies of the source strings, in slightly variant ways.
+    //
+    int i;
+    for (i=0; i<5; i++) {
+         firstGeneration[i]   = fSourceStrings[i];
+         secondGeneration[i]  = firstGeneration[i];
+         thirdGeneration[i]   = UnicodeString(secondGeneration[i]);
+ //        fourthGeneration[i]  = UnicodeString("Lay on, MacDuff, And damn'd be him that first cries, \"Hold, enough!\"");
+         fourthGeneration[i]  = UnicodeString();
+         fourthGeneration[i]  = thirdGeneration[i];
+    }
+
+
+    // Recurse to make even more copies of the strings/
+    //
+    if (recursionCount > 0) {
+        makeStringCopies(recursionCount-1);
+    }
+
+
+    // Verify that all four generations are equal.
+    for (i=0; i<5; i++) {
+        if (firstGeneration[i] !=  fSourceStrings[i]   ||
+            firstGeneration[i] !=  secondGeneration[i] ||
+            firstGeneration[i] !=  thirdGeneration[i]  ||
+            firstGeneration[i] !=  fourthGeneration[i])
+        {
+            fprintf(stderr, "Error, strings don't compare equal.\n");
+        }
+    }
+
+};
+  
+
+void   StringThreadTest::check() {
+    //
+    //  Check that the reference counts on the buffers for all of the source strings
+    //     are one.   The ref counts will have run way up while the test threads
+    //     make numerous copies of the strings, but at the top of the loop all
+    //     of the copies should be gone.
+    //
+    int i;
+
+    for (i=0; i<5; i++) {
+        if (fSourceStrings[i].fFlags & UnicodeString::kRefCounted) {
+            const UChar *buf = fSourceStrings[i].getBuffer();
+            uint32_t refCount = fSourceStrings[i].refCount();
+            if (refCount != 1) {
+                fprintf(stderr, "\nFailure.  SourceString Ref Count was %d, should be 1.\n", refCount);
+            }
+        }
+    }
+};
+  
+
+//
+//  Factory functoin for StringThreadTest.
+//     C function lets ThreadTest create StringTests without needing StringThreadTest header.
+// 
+AbstractThreadTest  *createStringTest() {
+    return new StringThreadTest();
+};