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gecko-dev
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gecko-dev/xpcom/tests/TestBuffers.cpp

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C++
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#include "nsIBuffer.h"
#include "nsIThread.h"
#include "nsIBaseStream.h"
#include "nsIComponentManager.h"
#include "nsIServiceManager.h"
#include "nsAutoLock.h"
#include "nsIPageManager.h"
#include "nsCRT.h"
#include "prprf.h"
#include "prmem.h"
#include "prinrval.h"
#include <stdio.h>
PRBool gVerbose = PR_FALSE;
class Reader : public nsIRunnable {
public:
NS_DECL_ISUPPORTS
NS_IMETHOD Run() {
nsresult rv;
nsAutoCMonitor mon(this);
char buf[100];
PRUint32 readCnt;
const char* readBuf;
rv = mReadBuffer->GetReadSegment(0, &readBuf, &readCnt);
if (NS_FAILED(rv)) return rv;
while (!(mDone && readCnt == 0)) {
rv = mReadBuffer->Read(buf, 99, &readCnt);
if (NS_FAILED(rv)) {
printf("read failed\n");
return rv;
}
if (readCnt == 0) {
if (mDone)
break;
mon.Notify(); // wake up writer
mon.Wait(); // wait for more
rv = mReadBuffer->GetReadSegment(0, &readBuf, &readCnt);
if (NS_FAILED(rv)) return rv;
}
else {
if (gVerbose) {
buf[readCnt] = 0;
printf(buf);
}
mBytesRead += readCnt;
}
}
if (gVerbose)
printf("reader done\n");
return rv;
}
Reader(nsIBuffer* readBuffer)
: mReadBuffer(readBuffer), mBytesRead(0), mDone(PR_FALSE) {
NS_INIT_REFCNT();
NS_ADDREF(mReadBuffer);
}
virtual ~Reader() {
NS_RELEASE(mReadBuffer);
if (gVerbose)
printf("bytes read = %d\n", mBytesRead);
}
void SetEOF() {
mDone = PR_TRUE;
}
PRUint32 GetBytesRead() { return mBytesRead; }
protected:
nsIBuffer* mReadBuffer;
PRUint32 mBytesRead;
PRBool mDone;
};
NS_IMPL_ISUPPORTS(Reader, nsIRunnable::GetIID());
////////////////////////////////////////////////////////////////////////////////
#define ITERATIONS 20000
nsresult
WriteMessages(nsIBuffer* buffer)
{
nsresult rv;
nsIThread* thread;
Reader* reader = new Reader(buffer);
NS_ADDREF(reader);
rv = NS_NewThread(&thread, reader);
if (NS_FAILED(rv)) {
printf("failed to create thread\n");
return rv;
}
char* mem = nsnull;
char* buf = nsnull;
PRUint32 total = 0;
PRUint32 cnt = 0;
PRUint32 bufLen = 0;
PRIntervalTime start = PR_IntervalNow();
for (PRUint32 i = 0; i < ITERATIONS;) {
if (bufLen == 0) {
PR_FREEIF(mem);
mem = PR_smprintf("%d. My hovercraft is full of eels.\n", i);
buf = mem;
NS_ASSERTION(buf, "out of memory");
bufLen = nsCRT::strlen(buf);
i++;
}
rv = buffer->Write(buf, bufLen, &cnt);
if (NS_FAILED(rv)) {
printf("failed to write %d\n", i);
return rv;
}
if (cnt == 0) {
nsAutoCMonitor mon(reader);
mon.Notify(); // wake up reader
mon.Wait(); // and wait for reader to read all
}
else {
total += cnt;
buf += cnt;
bufLen -= cnt;
}
}
PR_FREEIF(mem);
{
reader->SetEOF();
nsAutoCMonitor mon(reader);
mon.Notify(); // wake up reader
}
if (NS_FAILED(rv)) return rv;
rv = thread->Join();
PRIntervalTime end = PR_IntervalNow();
if (NS_FAILED(rv)) return rv;
printf("writer done: %d bytes %d ms\n", total,
PR_IntervalToMilliseconds(end - start));
NS_ASSERTION(reader->GetBytesRead() == total, "didn't read everything");
NS_RELEASE(reader);
NS_RELEASE(thread);
NS_RELEASE(buffer);
return NS_OK;
}
////////////////////////////////////////////////////////////////////////////////
nsresult
TestMallocBuffers(PRUint32 growByPages, PRUint32 pageCount)
{
nsresult rv;
nsIBuffer* buffer;
printf("Malloc Buffer Test: %d pages, grow by %d pages\n",
pageCount, growByPages);
rv = NS_NewBuffer(&buffer,
NS_PAGEMGR_PAGE_SIZE * growByPages,
NS_PAGEMGR_PAGE_SIZE * pageCount,
nsnull);
if (NS_FAILED(rv)) {
printf("failed to create buffer\n");
return rv;
}
rv = WriteMessages(buffer);
return rv;
}
nsresult
TestPageBuffers(PRUint32 growByPages, PRUint32 pageCount)
{
nsresult rv;
nsIBuffer* buffer;
printf("Page Buffer Test: %d pages, grow by %d pages\n",
pageCount, growByPages);
rv = NS_NewPageBuffer(&buffer,
NS_PAGEMGR_PAGE_SIZE * growByPages,
NS_PAGEMGR_PAGE_SIZE * pageCount,
nsnull);
if (NS_FAILED(rv)) {
printf("failed to create buffer\n");
return rv;
}
rv = WriteMessages(buffer);
return rv;
}
////////////////////////////////////////////////////////////////////////////////
void
TestSearch(const char* delim, PRUint32 segDataSize)
{
nsresult rv;
nsIBuffer* buffer;
// need at least 2 segments to test boundary conditions:
PRUint32 bufDataSize = segDataSize * 2;
PRUint32 segSize = segDataSize + nsIBuffer::SEGMENT_OVERHEAD;
PRUint32 bufSize = segSize * 2;
rv = NS_NewBuffer(&buffer, segSize, bufSize, nsnull);
NS_ASSERTION(NS_SUCCEEDED(rv), "NewBuffer failed");
PRUint32 i, j, amt;
PRUint32 delimLen = nsCRT::strlen(delim);
for (i = 0; i < bufDataSize; i++) {
// first fill the buffer
for (j = 0; j < i; j++) {
rv = buffer->Write("-", 1, &amt);
NS_ASSERTION(NS_SUCCEEDED(rv) && amt == 1, "Write failed");
}
rv = buffer->Write(delim, delimLen, &amt);
NS_ASSERTION(NS_SUCCEEDED(rv), "Write failed");
if (i + amt < bufDataSize) {
for (j = i + amt; j < bufDataSize; j++) {
rv = buffer->Write("+", 1, &amt);
NS_ASSERTION(NS_SUCCEEDED(rv) && amt == 1, "Write failed");
}
}
// now search for the delimiter
PRBool found;
PRUint32 offset;
rv = buffer->Search(delim, PR_FALSE, &found, &offset);
NS_ASSERTION(NS_SUCCEEDED(rv), "Search failed");
// print the results
char* bufferContents = new char[bufDataSize + 1];
rv = buffer->Read(bufferContents, bufDataSize, &amt);
NS_ASSERTION(NS_SUCCEEDED(rv) && amt == bufDataSize, "Read failed");
bufferContents[bufDataSize] = '\0';
printf("Buffer: %s\nDelim: %s %s offset: %d\n", bufferContents,
delim, (found ? "found" : "not found"), offset);
}
}
////////////////////////////////////////////////////////////////////////////////
NS_METHOD
FailingReader(void* closure,
char* toRawSegment,
PRUint32 fromOffset,
PRUint32 count,
PRUint32 *readCount)
{
nsresult* rv = (nsresult*)closure;
*readCount = 0;
return *rv;
}
nsresult
TestWriteSegments(nsresult error)
{
nsresult rv;
nsIBuffer* buffer;
printf("WriteSegments Test: error %x\n", error);
rv = NS_NewBuffer(&buffer, 10, 10, nsnull);
if (NS_FAILED(rv)) {
printf("failed to create buffer\n");
return rv;
}
PRUint32 writeCount;
rv = buffer->WriteSegments(FailingReader, &error, 1, &writeCount);
NS_ASSERTION(rv == error, "WriteSegments failed");
NS_RELEASE(buffer);
return NS_OK;
}
////////////////////////////////////////////////////////////////////////////////
NS_METHOD
FailingWriter(void* closure,
const char* fromRawSegment,
PRUint32 toOffset,
PRUint32 count,
PRUint32 *writeCount)
{
nsresult* rv = (nsresult*)closure;
*writeCount = 0;
return *rv;
}
nsresult
TestReadSegments(nsresult error)
{
nsresult rv;
nsIBuffer* buffer;
printf("ReadSegments Test: error %x\n", error);
rv = NS_NewBuffer(&buffer, 10, 10, nsnull);
if (NS_FAILED(rv)) {
printf("failed to create buffer\n");
return rv;
}
PRUint32 writeCount;
rv = buffer->Write("x", 1, &writeCount);
NS_ASSERTION(NS_SUCCEEDED(rv) && writeCount == 1, "Write failed");
PRUint32 readCount;
rv = buffer->ReadSegments(FailingWriter, &error, 1, &readCount);
NS_ASSERTION(rv == error, "ReadSegments failed");
NS_RELEASE(buffer);
return NS_OK;
}
////////////////////////////////////////////////////////////////////////////////
int
main(int argc, char* argv[])
{
nsresult rv;
nsIServiceManager* servMgr;
if (argc >= 2 && nsCRT::strcmp(argv[1], "-verbose") == 0) {
gVerbose = PR_TRUE;
}
rv = NS_InitXPCOM(&servMgr);
if (NS_FAILED(rv)) return rv;
rv = TestWriteSegments(NS_OK);
NS_ASSERTION(NS_SUCCEEDED(rv), "TestWriteSegments failed");
rv = TestWriteSegments(NS_ERROR_FAILURE);
NS_ASSERTION(NS_SUCCEEDED(rv), "TestWriteSegments failed");
rv = TestWriteSegments(NS_BASE_STREAM_EOF);
NS_ASSERTION(NS_SUCCEEDED(rv), "TestWriteSegments failed");
rv = TestWriteSegments(NS_BASE_STREAM_WOULD_BLOCK);
NS_ASSERTION(NS_SUCCEEDED(rv), "TestWriteSegments failed");
rv = TestReadSegments(NS_OK);
NS_ASSERTION(NS_SUCCEEDED(rv), "TestReadSegments failed");
rv = TestReadSegments(NS_ERROR_FAILURE);
NS_ASSERTION(NS_SUCCEEDED(rv), "TestReadSegments failed");
// rv = TestReadSegments(NS_BASE_STREAM_EOF);
// NS_ASSERTION(NS_SUCCEEDED(rv), "TestReadSegments failed");
rv = TestReadSegments(NS_BASE_STREAM_WOULD_BLOCK);
NS_ASSERTION(NS_SUCCEEDED(rv), "TestReadSegments failed");
rv = TestMallocBuffers(1, 1);
NS_ASSERTION(NS_SUCCEEDED(rv), "TestMallocBuffers failed");
rv = TestPageBuffers(1, 1);
NS_ASSERTION(NS_SUCCEEDED(rv), "TestPageBuffers failed");
rv = TestMallocBuffers(1, 10);
NS_ASSERTION(NS_SUCCEEDED(rv), "TestMallocBuffers failed");
rv = TestPageBuffers(1, 10);
NS_ASSERTION(NS_SUCCEEDED(rv), "TestPageBuffers failed");
rv = TestMallocBuffers(5, 10);
NS_ASSERTION(NS_SUCCEEDED(rv), "TestMallocBuffers failed");
rv = TestPageBuffers(5, 10);
NS_ASSERTION(NS_SUCCEEDED(rv), "TestPageBuffers failed");
TestSearch("foo", 8);
TestSearch("bar", 6);
TestSearch("baz", 2);
return 0;
}
////////////////////////////////////////////////////////////////////////////////
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