зеркало из https://github.com/mozilla/pjs.git
271 строка
7.0 KiB
C++
271 строка
7.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Jeff Walden <jwalden+code@mit.edu>.
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* Portions created by the Initial Developer are Copyright (C) 2007
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "TestHarness.h"
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#include "nsIPipe.h"
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#include "nsIMemory.h"
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/** NS_NewPipe2 reimplemented, because it's not exported by XPCOM */
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nsresult TP_NewPipe2(nsIAsyncInputStream** input,
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nsIAsyncOutputStream** output,
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PRBool nonBlockingInput,
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PRBool nonBlockingOutput,
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PRUint32 segmentSize,
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PRUint32 segmentCount,
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nsIMemory* segmentAlloc)
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{
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nsCOMPtr<nsIPipe> pipe = do_CreateInstance("@mozilla.org/pipe;1");
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if (!pipe)
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return NS_ERROR_OUT_OF_MEMORY;
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nsresult rv = pipe->Init(nonBlockingInput,
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nonBlockingOutput,
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segmentSize,
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segmentCount,
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segmentAlloc);
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if (NS_FAILED(rv))
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return rv;
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pipe->GetInputStream(input);
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pipe->GetOutputStream(output);
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return NS_OK;
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}
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/**
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* Allocator can allocate exactly count * size bytes, stored at mMemory;
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* immediately after the end of this is a byte-map of 0/1 values indicating
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* which <size>-byte locations in mMemory are empty and which are filled.
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* Pretty stupid, but enough to test bug 394692.
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*/
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class BackwardsAllocator : public nsIMemory
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{
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public:
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BackwardsAllocator()
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: mMemory(0),
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mIndex(0xFFFFFFFF),
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mCount(0xFFFFFFFF),
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mSize(0)
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{ }
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~BackwardsAllocator()
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{
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delete [] mMemory;
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}
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nsresult Init(PRUint32 count, size_t size);
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NS_DECL_ISUPPORTS
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NS_DECL_NSIMEMORY
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private:
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PRUint32 previous(PRUint32 i)
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{
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if (i == 0)
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return mCount - 1;
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return i - 1;
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}
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private:
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PRUint8* mMemory;
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PRUint32 mIndex;
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PRUint32 mCount;
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size_t mSize;
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};
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NS_IMPL_ISUPPORTS1(BackwardsAllocator, nsIMemory)
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nsresult BackwardsAllocator::Init(PRUint32 count, size_t size)
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{
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if (mMemory)
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{
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fail("allocator already initialized!");
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return NS_ERROR_ALREADY_INITIALIZED;
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}
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mMemory = new PRUint8[count * size + count];
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if (!mMemory)
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{
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fail("failed to allocate mMemory!");
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return NS_ERROR_OUT_OF_MEMORY;
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}
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memset(mMemory, 0, count * size + count);
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mIndex = 0;
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mCount = count;
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mSize = size;
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return NS_OK;
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}
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NS_IMETHODIMP_(void*) BackwardsAllocator::Alloc(size_t size)
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{
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if (size != mSize)
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{
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NS_ERROR("umm, why would this be reached for this test?");
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return NULL;
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}
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PRUint32 index = mIndex;
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while ((index = previous(index)) != mIndex)
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{
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if (mMemory[mSize * mCount + index] == 1)
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continue;
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mMemory[mSize * mCount + index] = 1;
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mIndex = index;
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return &mMemory[mSize * index];
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}
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NS_ERROR("shouldn't reach here in this test");
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return NULL;
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}
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NS_IMETHODIMP_(void*) BackwardsAllocator::Realloc(void* ptr, size_t newSize)
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{
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NS_ERROR("shouldn't reach here in this test");
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return NULL;
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}
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NS_IMETHODIMP_(void) BackwardsAllocator::Free(void* ptr)
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{
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PRUint8* p = static_cast<PRUint8*>(ptr);
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if (p)
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mMemory[mCount * mSize + (p - mMemory) / mSize] = 0;
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}
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NS_IMETHODIMP BackwardsAllocator::HeapMinimize(PRBool immediate)
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{
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return NS_OK;
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}
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NS_IMETHODIMP BackwardsAllocator::IsLowMemory(PRBool* retval)
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{
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*retval = PR_FALSE;
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return NS_OK;
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}
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nsresult TestBackwardsAllocator()
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{
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const PRUint32 SEGMENT_COUNT = 10;
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const PRUint32 SEGMENT_SIZE = 10;
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nsRefPtr<BackwardsAllocator> allocator = new BackwardsAllocator();
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if (!allocator)
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{
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fail("Allocation of BackwardsAllocator failed!");
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return NS_ERROR_OUT_OF_MEMORY;
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}
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nsresult rv = allocator->Init(SEGMENT_COUNT, SEGMENT_SIZE);
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if (NS_FAILED(rv))
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return rv;
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nsCOMPtr<nsIAsyncInputStream> input;
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nsCOMPtr<nsIAsyncOutputStream> output;
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rv = TP_NewPipe2(getter_AddRefs(input),
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getter_AddRefs(output),
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PR_FALSE,
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PR_FALSE,
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SEGMENT_SIZE, SEGMENT_COUNT, allocator);
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if (NS_FAILED(rv))
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{
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fail("TP_NewPipe2 failed: %x", rv);
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return rv;
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}
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const PRUint32 BUFFER_LENGTH = 100;
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const char written[] =
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"0123456789"
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"1123456789"
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"2123456789"
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"3123456789"
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"4123456789"
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"5123456789"
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"6123456789"
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"7123456789"
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"8123456789"
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"9123456789"; // not just a memset, to ensure the allocator works correctly
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if (sizeof(written) < BUFFER_LENGTH)
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{
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fail("test error with string size");
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return NS_ERROR_FAILURE;
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}
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PRUint32 writeCount;
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rv = output->Write(written, BUFFER_LENGTH, &writeCount);
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if (NS_FAILED(rv) || writeCount != BUFFER_LENGTH)
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{
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fail("writing %d bytes (wrote %d bytes) to output failed: %x",
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BUFFER_LENGTH, writeCount, rv);
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return rv;
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}
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char read[BUFFER_LENGTH];
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PRUint32 readCount;
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rv = input->Read(read, BUFFER_LENGTH, &readCount);
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if (NS_FAILED(rv) || readCount != BUFFER_LENGTH)
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{
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fail("reading %d bytes (got %d bytes) from input failed: %x",
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BUFFER_LENGTH, readCount, rv);
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return rv;
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}
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if (0 != memcmp(written, read, BUFFER_LENGTH))
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{
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fail("didn't read the written data correctly!");
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return NS_ERROR_FAILURE;
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}
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passed("TestBackwardsAllocator");
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return NS_OK;
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}
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int main(int argc, char** argv)
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{
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ScopedXPCOM xpcom("nsPipe");
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if (xpcom.failed())
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return 1;
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int rv = 0;
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if (NS_FAILED(TestBackwardsAllocator()))
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rv = 1;
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return rv;
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}
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