forked from mirrors/gecko-dev
938 lines
23 KiB
C++
938 lines
23 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "CacheLog.h"
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#include "CacheFileChunk.h"
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#include "CacheFile.h"
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#include "nsThreadUtils.h"
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#include "mozilla/IntegerPrintfMacros.h"
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namespace mozilla {
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namespace net {
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#define kMinBufSize 512
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CacheFileChunkBuffer::CacheFileChunkBuffer(CacheFileChunk *aChunk)
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: mChunk(aChunk)
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, mBuf(nullptr)
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, mBufSize(0)
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, mDataSize(0)
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, mReadHandlesCount(0)
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, mWriteHandleExists(false)
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{
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}
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CacheFileChunkBuffer::~CacheFileChunkBuffer()
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{
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if (mBuf) {
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CacheFileUtils::FreeBuffer(mBuf);
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mBuf = nullptr;
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mChunk->BuffersAllocationChanged(mBufSize, 0);
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mBufSize = 0;
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}
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}
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void
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CacheFileChunkBuffer::CopyFrom(CacheFileChunkBuffer *aOther)
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{
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MOZ_RELEASE_ASSERT(mBufSize >= aOther->mDataSize);
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mDataSize = aOther->mDataSize;
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memcpy(mBuf, aOther->mBuf, mDataSize);
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}
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nsresult
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CacheFileChunkBuffer::FillInvalidRanges(CacheFileChunkBuffer *aOther,
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CacheFileUtils::ValidityMap *aMap)
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{
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nsresult rv;
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rv = EnsureBufSize(aOther->mDataSize);
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if (NS_FAILED(rv)) {
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return rv;
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}
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uint32_t invalidOffset = 0;
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uint32_t invalidLength;
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for (uint32_t i = 0; i < aMap->Length(); ++i) {
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uint32_t validOffset = (*aMap)[i].Offset();
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uint32_t validLength = (*aMap)[i].Len();
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MOZ_RELEASE_ASSERT(invalidOffset <= validOffset);
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invalidLength = validOffset - invalidOffset;
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if (invalidLength > 0) {
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MOZ_RELEASE_ASSERT(invalidOffset + invalidLength <= aOther->mDataSize);
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memcpy(mBuf + invalidOffset, aOther->mBuf + invalidOffset, invalidLength);
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}
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invalidOffset = validOffset + validLength;
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}
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if (invalidOffset < aOther->mDataSize) {
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invalidLength = aOther->mDataSize - invalidOffset;
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memcpy(mBuf + invalidOffset, aOther->mBuf + invalidOffset, invalidLength);
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}
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return NS_OK;
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}
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MOZ_MUST_USE nsresult
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CacheFileChunkBuffer::EnsureBufSize(uint32_t aBufSize)
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{
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AssertOwnsLock();
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if (mBufSize >= aBufSize) {
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return NS_OK;
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}
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// find smallest power of 2 greater than or equal to aBufSize
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aBufSize--;
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aBufSize |= aBufSize >> 1;
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aBufSize |= aBufSize >> 2;
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aBufSize |= aBufSize >> 4;
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aBufSize |= aBufSize >> 8;
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aBufSize |= aBufSize >> 16;
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aBufSize++;
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const uint32_t minBufSize = kMinBufSize;
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const uint32_t maxBufSize = kChunkSize;
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aBufSize = clamped(aBufSize, minBufSize, maxBufSize);
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if (!mChunk->CanAllocate(aBufSize - mBufSize)) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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char *newBuf = static_cast<char *>(realloc(mBuf, aBufSize));
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if (!newBuf) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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mChunk->BuffersAllocationChanged(mBufSize, aBufSize);
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mBuf = newBuf;
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mBufSize = aBufSize;
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return NS_OK;
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}
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void
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CacheFileChunkBuffer::SetDataSize(uint32_t aDataSize)
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{
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MOZ_RELEASE_ASSERT(
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// EnsureBufSize must be called before SetDataSize, so the new data size
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// is guaranteed to be smaller than or equal to mBufSize.
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aDataSize <= mBufSize ||
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// The only exception is an optimization when we read the data from the
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// disk. The data is read to a separate buffer and CacheFileChunk::mBuf is
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// empty (see CacheFileChunk::Read). We need to set mBuf::mDataSize
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// accordingly so that DataSize() methods return correct value, but we don't
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// want to allocate the buffer since it wouldn't be used in most cases.
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(mBufSize == 0 && mChunk->mState == CacheFileChunk::READING));
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mDataSize = aDataSize;
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}
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void
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CacheFileChunkBuffer::AssertOwnsLock() const
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{
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mChunk->AssertOwnsLock();
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}
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void
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CacheFileChunkBuffer::RemoveReadHandle()
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{
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AssertOwnsLock();
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MOZ_RELEASE_ASSERT(mReadHandlesCount);
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MOZ_RELEASE_ASSERT(!mWriteHandleExists);
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mReadHandlesCount--;
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if (mReadHandlesCount == 0 && mChunk->mBuf != this) {
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DebugOnly<bool> removed = mChunk->mOldBufs.RemoveElement(this);
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MOZ_ASSERT(removed);
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}
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}
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void
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CacheFileChunkBuffer::RemoveWriteHandle()
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{
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AssertOwnsLock();
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MOZ_RELEASE_ASSERT(mReadHandlesCount == 0);
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MOZ_RELEASE_ASSERT(mWriteHandleExists);
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mWriteHandleExists = false;
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}
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size_t
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CacheFileChunkBuffer::SizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf) const
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{
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size_t n = mallocSizeOf(this);
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if (mBuf) {
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n += mallocSizeOf(mBuf);
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}
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return n;
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}
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uint32_t
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CacheFileChunkHandle::DataSize()
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{
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MOZ_ASSERT(mBuf, "Unexpected call on dummy handle");
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mBuf->AssertOwnsLock();
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return mBuf->mDataSize;
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}
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uint32_t
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CacheFileChunkHandle::Offset()
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{
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MOZ_ASSERT(mBuf, "Unexpected call on dummy handle");
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mBuf->AssertOwnsLock();
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return mBuf->mChunk->Index() * kChunkSize;
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}
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CacheFileChunkReadHandle::CacheFileChunkReadHandle(CacheFileChunkBuffer *aBuf)
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{
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mBuf = aBuf;
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mBuf->mReadHandlesCount++;
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}
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CacheFileChunkReadHandle::~CacheFileChunkReadHandle()
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{
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mBuf->RemoveReadHandle();
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}
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const char *
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CacheFileChunkReadHandle::Buf()
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{
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return mBuf->mBuf;
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}
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CacheFileChunkWriteHandle::CacheFileChunkWriteHandle(CacheFileChunkBuffer *aBuf)
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{
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mBuf = aBuf;
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if (mBuf) {
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MOZ_ASSERT(!mBuf->mWriteHandleExists);
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mBuf->mWriteHandleExists = true;
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}
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}
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CacheFileChunkWriteHandle::~CacheFileChunkWriteHandle()
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{
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if (mBuf) {
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mBuf->RemoveWriteHandle();
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}
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}
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char *
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CacheFileChunkWriteHandle::Buf()
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{
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return mBuf ? mBuf->mBuf : nullptr;
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}
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void
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CacheFileChunkWriteHandle::UpdateDataSize(uint32_t aOffset, uint32_t aLen)
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{
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MOZ_ASSERT(mBuf, "Write performed on dummy handle?");
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MOZ_ASSERT(aOffset <= mBuf->mDataSize);
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MOZ_ASSERT(aOffset + aLen <= mBuf->mBufSize);
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if (aOffset + aLen > mBuf->mDataSize) {
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mBuf->mDataSize = aOffset + aLen;
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}
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mBuf->mChunk->UpdateDataSize(aOffset, aLen);
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}
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class NotifyUpdateListenerEvent : public Runnable {
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public:
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NotifyUpdateListenerEvent(CacheFileChunkListener* aCallback,
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CacheFileChunk* aChunk)
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: Runnable("net::NotifyUpdateListenerEvent")
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, mCallback(aCallback)
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, mChunk(aChunk)
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{
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LOG(("NotifyUpdateListenerEvent::NotifyUpdateListenerEvent() [this=%p]",
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this));
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}
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protected:
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~NotifyUpdateListenerEvent()
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{
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LOG(("NotifyUpdateListenerEvent::~NotifyUpdateListenerEvent() [this=%p]",
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this));
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}
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public:
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NS_IMETHOD Run() override
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{
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LOG(("NotifyUpdateListenerEvent::Run() [this=%p]", this));
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mCallback->OnChunkUpdated(mChunk);
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return NS_OK;
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}
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protected:
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nsCOMPtr<CacheFileChunkListener> mCallback;
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RefPtr<CacheFileChunk> mChunk;
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};
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bool
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CacheFileChunk::DispatchRelease()
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{
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if (NS_IsMainThread()) {
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return false;
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}
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NS_DispatchToMainThread(NewNonOwningRunnableMethod(
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"net::CacheFileChunk::Release", this, &CacheFileChunk::Release));
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return true;
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}
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NS_IMPL_ADDREF(CacheFileChunk)
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NS_IMETHODIMP_(MozExternalRefCountType)
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CacheFileChunk::Release()
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{
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nsrefcnt count = mRefCnt - 1;
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if (DispatchRelease()) {
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// Redispatched to the main thread.
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return count;
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}
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NS_PRECONDITION(0 != mRefCnt, "dup release");
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count = --mRefCnt;
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NS_LOG_RELEASE(this, count, "CacheFileChunk");
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if (0 == count) {
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mRefCnt = 1;
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delete (this);
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return 0;
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}
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// We can safely access this chunk after decreasing mRefCnt since we re-post
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// all calls to Release() happening off the main thread to the main thread.
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// I.e. no other Release() that would delete the object could be run before
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// we call CacheFile::DeactivateChunk().
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//
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// NOTE: we don't grab the CacheFile's lock, so the chunk might be addrefed
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// on another thread before CacheFile::DeactivateChunk() grabs the lock on
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// this thread. To make sure we won't deactivate chunk that was just returned
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// to a new consumer we check mRefCnt once again in
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// CacheFile::DeactivateChunk() after we grab the lock.
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if (mActiveChunk && count == 1) {
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mFile->DeactivateChunk(this);
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}
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return count;
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}
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NS_INTERFACE_MAP_BEGIN(CacheFileChunk)
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NS_INTERFACE_MAP_ENTRY(mozilla::net::CacheFileIOListener)
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_END_THREADSAFE
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CacheFileChunk::CacheFileChunk(CacheFile *aFile, uint32_t aIndex,
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bool aInitByWriter)
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: CacheMemoryConsumer(aFile->mOpenAsMemoryOnly ? MEMORY_ONLY : DONT_REPORT)
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, mIndex(aIndex)
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, mState(INITIAL)
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, mStatus(NS_OK)
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, mActiveChunk(false)
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, mIsDirty(false)
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, mDiscardedChunk(false)
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, mBuffersSize(0)
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, mLimitAllocation(!aFile->mOpenAsMemoryOnly && aInitByWriter)
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, mIsPriority(aFile->mPriority)
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, mExpectedHash(0)
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, mFile(aFile)
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{
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LOG(("CacheFileChunk::CacheFileChunk() [this=%p, index=%u, initByWriter=%d]",
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this, aIndex, aInitByWriter));
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mBuf = new CacheFileChunkBuffer(this);
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}
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CacheFileChunk::~CacheFileChunk()
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{
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LOG(("CacheFileChunk::~CacheFileChunk() [this=%p]", this));
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}
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void
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CacheFileChunk::AssertOwnsLock() const
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{
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mFile->AssertOwnsLock();
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}
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void
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CacheFileChunk::InitNew()
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{
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AssertOwnsLock();
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LOG(("CacheFileChunk::InitNew() [this=%p]", this));
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MOZ_ASSERT(mState == INITIAL);
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MOZ_ASSERT(NS_SUCCEEDED(mStatus));
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MOZ_ASSERT(!mBuf->Buf());
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MOZ_ASSERT(!mWritingStateHandle);
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MOZ_ASSERT(!mReadingStateBuf);
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MOZ_ASSERT(!mIsDirty);
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mBuf = new CacheFileChunkBuffer(this);
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mState = READY;
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}
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nsresult
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CacheFileChunk::Read(CacheFileHandle *aHandle, uint32_t aLen,
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CacheHash::Hash16_t aHash,
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CacheFileChunkListener *aCallback)
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{
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AssertOwnsLock();
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LOG(("CacheFileChunk::Read() [this=%p, handle=%p, len=%d, listener=%p]",
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this, aHandle, aLen, aCallback));
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MOZ_ASSERT(mState == INITIAL);
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MOZ_ASSERT(NS_SUCCEEDED(mStatus));
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MOZ_ASSERT(!mBuf->Buf());
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MOZ_ASSERT(!mWritingStateHandle);
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MOZ_ASSERT(!mReadingStateBuf);
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MOZ_ASSERT(aLen);
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nsresult rv;
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mState = READING;
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RefPtr<CacheFileChunkBuffer> tmpBuf = new CacheFileChunkBuffer(this);
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rv = tmpBuf->EnsureBufSize(aLen);
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if (NS_FAILED(rv)) {
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SetError(rv);
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return mStatus;
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}
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tmpBuf->SetDataSize(aLen);
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rv = CacheFileIOManager::Read(aHandle, mIndex * kChunkSize,
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tmpBuf->Buf(), aLen,
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this);
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if (NS_WARN_IF(NS_FAILED(rv))) {
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rv = mIndex ? NS_ERROR_FILE_CORRUPTED : NS_ERROR_FILE_NOT_FOUND;
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SetError(rv);
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} else {
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mReadingStateBuf.swap(tmpBuf);
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mListener = aCallback;
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// mBuf contains no data but we set datasize to size of the data that will
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// be read from the disk. No handle is allowed to access the non-existent
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// data until reading finishes, but data can be appended or overwritten.
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// These pieces are tracked in mValidityMap and will be merged with the data
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// read from disk in OnDataRead().
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mBuf->SetDataSize(aLen);
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mExpectedHash = aHash;
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}
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return rv;
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}
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nsresult
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CacheFileChunk::Write(CacheFileHandle *aHandle,
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CacheFileChunkListener *aCallback)
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{
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AssertOwnsLock();
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LOG(("CacheFileChunk::Write() [this=%p, handle=%p, listener=%p]",
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this, aHandle, aCallback));
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MOZ_ASSERT(mState == READY);
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MOZ_ASSERT(NS_SUCCEEDED(mStatus));
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MOZ_ASSERT(!mWritingStateHandle);
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MOZ_ASSERT(mBuf->DataSize()); // Don't write chunk when it is empty
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MOZ_ASSERT(mBuf->ReadHandlesCount() == 0);
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MOZ_ASSERT(!mBuf->WriteHandleExists());
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nsresult rv;
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mState = WRITING;
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mWritingStateHandle = new CacheFileChunkReadHandle(mBuf);
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rv = CacheFileIOManager::Write(aHandle, mIndex * kChunkSize,
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mWritingStateHandle->Buf(),
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mWritingStateHandle->DataSize(),
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false, false, this);
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if (NS_WARN_IF(NS_FAILED(rv))) {
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mWritingStateHandle = nullptr;
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SetError(rv);
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} else {
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mListener = aCallback;
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mIsDirty = false;
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}
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return rv;
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}
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void
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CacheFileChunk::WaitForUpdate(CacheFileChunkListener *aCallback)
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{
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AssertOwnsLock();
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LOG(("CacheFileChunk::WaitForUpdate() [this=%p, listener=%p]",
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this, aCallback));
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MOZ_ASSERT(mFile->mOutput);
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MOZ_ASSERT(IsReady());
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#ifdef DEBUG
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for (uint32_t i = 0 ; i < mUpdateListeners.Length() ; i++) {
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MOZ_ASSERT(mUpdateListeners[i]->mCallback != aCallback);
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}
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#endif
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ChunkListenerItem *item = new ChunkListenerItem();
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item->mTarget = CacheFileIOManager::IOTarget();
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if (!item->mTarget) {
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LOG(("CacheFileChunk::WaitForUpdate() - Cannot get Cache I/O thread! Using "
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"main thread for callback."));
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item->mTarget = GetMainThreadEventTarget();
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}
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item->mCallback = aCallback;
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MOZ_ASSERT(item->mTarget);
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item->mCallback = aCallback;
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mUpdateListeners.AppendElement(item);
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}
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nsresult
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CacheFileChunk::CancelWait(CacheFileChunkListener *aCallback)
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{
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AssertOwnsLock();
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LOG(("CacheFileChunk::CancelWait() [this=%p, listener=%p]", this, aCallback));
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MOZ_ASSERT(IsReady());
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uint32_t i;
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for (i = 0 ; i < mUpdateListeners.Length() ; i++) {
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ChunkListenerItem *item = mUpdateListeners[i];
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if (item->mCallback == aCallback) {
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mUpdateListeners.RemoveElementAt(i);
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delete item;
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break;
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}
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}
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|
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#ifdef DEBUG
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for ( ; i < mUpdateListeners.Length() ; i++) {
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MOZ_ASSERT(mUpdateListeners[i]->mCallback != aCallback);
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}
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#endif
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return NS_OK;
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}
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nsresult
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CacheFileChunk::NotifyUpdateListeners()
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{
|
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AssertOwnsLock();
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LOG(("CacheFileChunk::NotifyUpdateListeners() [this=%p]", this));
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|
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MOZ_ASSERT(IsReady());
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|
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nsresult rv, rv2;
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|
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rv = NS_OK;
|
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for (uint32_t i = 0 ; i < mUpdateListeners.Length() ; i++) {
|
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ChunkListenerItem *item = mUpdateListeners[i];
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|
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LOG(("CacheFileChunk::NotifyUpdateListeners() - Notifying listener %p "
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"[this=%p]", item->mCallback.get(), this));
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|
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RefPtr<NotifyUpdateListenerEvent> ev;
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ev = new NotifyUpdateListenerEvent(item->mCallback, this);
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rv2 = item->mTarget->Dispatch(ev, NS_DISPATCH_NORMAL);
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if (NS_FAILED(rv2) && NS_SUCCEEDED(rv))
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rv = rv2;
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delete item;
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}
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mUpdateListeners.Clear();
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|
|
return rv;
|
|
}
|
|
|
|
uint32_t
|
|
CacheFileChunk::Index() const
|
|
{
|
|
return mIndex;
|
|
}
|
|
|
|
CacheHash::Hash16_t
|
|
CacheFileChunk::Hash() const
|
|
{
|
|
MOZ_ASSERT(IsReady());
|
|
|
|
return CacheHash::Hash16(mBuf->Buf(), mBuf->DataSize());
|
|
}
|
|
|
|
uint32_t
|
|
CacheFileChunk::DataSize() const
|
|
{
|
|
return mBuf->DataSize();
|
|
}
|
|
|
|
void
|
|
CacheFileChunk::UpdateDataSize(uint32_t aOffset, uint32_t aLen)
|
|
{
|
|
AssertOwnsLock();
|
|
|
|
// UpdateDataSize() is called only when we've written some data to the chunk
|
|
// and we never write data anymore once some error occurs.
|
|
MOZ_ASSERT(NS_SUCCEEDED(mStatus));
|
|
|
|
LOG(("CacheFileChunk::UpdateDataSize() [this=%p, offset=%d, len=%d]",
|
|
this, aOffset, aLen));
|
|
|
|
mIsDirty = true;
|
|
|
|
int64_t fileSize = static_cast<int64_t>(kChunkSize) * mIndex + aOffset + aLen;
|
|
bool notify = false;
|
|
|
|
if (fileSize > mFile->mDataSize) {
|
|
mFile->mDataSize = fileSize;
|
|
notify = true;
|
|
}
|
|
|
|
if (mState == READY || mState == WRITING) {
|
|
MOZ_ASSERT(mValidityMap.Length() == 0);
|
|
|
|
if (notify) {
|
|
NotifyUpdateListeners();
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
// We're still waiting for data from the disk. This chunk cannot be used by
|
|
// input stream, so there must be no update listener. We also need to keep
|
|
// track of where the data is written so that we can correctly merge the new
|
|
// data with the old one.
|
|
|
|
MOZ_ASSERT(mUpdateListeners.Length() == 0);
|
|
MOZ_ASSERT(mState == READING);
|
|
|
|
mValidityMap.AddPair(aOffset, aLen);
|
|
mValidityMap.Log();
|
|
}
|
|
|
|
nsresult
|
|
CacheFileChunk::Truncate(uint32_t aOffset)
|
|
{
|
|
MOZ_RELEASE_ASSERT(mState == READY || mState == WRITING || mState == READING);
|
|
|
|
if (mState == READING) {
|
|
mIsDirty = true;
|
|
}
|
|
|
|
mBuf->SetDataSize(aOffset);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
CacheFileChunk::OnFileOpened(CacheFileHandle *aHandle, nsresult aResult)
|
|
{
|
|
MOZ_CRASH("CacheFileChunk::OnFileOpened should not be called!");
|
|
return NS_ERROR_UNEXPECTED;
|
|
}
|
|
|
|
nsresult
|
|
CacheFileChunk::OnDataWritten(CacheFileHandle *aHandle, const char *aBuf,
|
|
nsresult aResult)
|
|
{
|
|
LOG(("CacheFileChunk::OnDataWritten() [this=%p, handle=%p, result=0x%08" PRIx32 "]",
|
|
this, aHandle, static_cast<uint32_t>(aResult)));
|
|
|
|
nsCOMPtr<CacheFileChunkListener> listener;
|
|
|
|
{
|
|
CacheFileAutoLock lock(mFile);
|
|
|
|
MOZ_ASSERT(mState == WRITING);
|
|
MOZ_ASSERT(mListener);
|
|
|
|
mWritingStateHandle = nullptr;
|
|
|
|
if (NS_WARN_IF(NS_FAILED(aResult))) {
|
|
SetError(aResult);
|
|
}
|
|
|
|
mState = READY;
|
|
mListener.swap(listener);
|
|
}
|
|
|
|
listener->OnChunkWritten(aResult, this);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
CacheFileChunk::OnDataRead(CacheFileHandle *aHandle, char *aBuf,
|
|
nsresult aResult)
|
|
{
|
|
LOG(("CacheFileChunk::OnDataRead() [this=%p, handle=%p, result=0x%08" PRIx32 "]",
|
|
this, aHandle, static_cast<uint32_t>(aResult)));
|
|
|
|
nsCOMPtr<CacheFileChunkListener> listener;
|
|
|
|
{
|
|
CacheFileAutoLock lock(mFile);
|
|
|
|
MOZ_ASSERT(mState == READING);
|
|
MOZ_ASSERT(mListener);
|
|
MOZ_ASSERT(mReadingStateBuf);
|
|
MOZ_RELEASE_ASSERT(mBuf->ReadHandlesCount() == 0);
|
|
MOZ_RELEASE_ASSERT(!mBuf->WriteHandleExists());
|
|
|
|
RefPtr<CacheFileChunkBuffer> tmpBuf;
|
|
tmpBuf.swap(mReadingStateBuf);
|
|
|
|
if (NS_SUCCEEDED(aResult)) {
|
|
CacheHash::Hash16_t hash = CacheHash::Hash16(tmpBuf->Buf(),
|
|
tmpBuf->DataSize());
|
|
if (hash != mExpectedHash) {
|
|
LOG(("CacheFileChunk::OnDataRead() - Hash mismatch! Hash of the data is"
|
|
" %hx, hash in metadata is %hx. [this=%p, idx=%d]",
|
|
hash, mExpectedHash, this, mIndex));
|
|
aResult = NS_ERROR_FILE_CORRUPTED;
|
|
} else {
|
|
if (mBuf->DataSize() < tmpBuf->DataSize()) {
|
|
// Truncate() was called while the data was being read.
|
|
tmpBuf->SetDataSize(mBuf->DataSize());
|
|
}
|
|
|
|
if (!mBuf->Buf()) {
|
|
// Just swap the buffers if mBuf is still empty
|
|
mBuf.swap(tmpBuf);
|
|
} else {
|
|
LOG(("CacheFileChunk::OnDataRead() - Merging buffers. [this=%p]",
|
|
this));
|
|
|
|
mValidityMap.Log();
|
|
aResult = mBuf->FillInvalidRanges(tmpBuf, &mValidityMap);
|
|
mValidityMap.Clear();
|
|
}
|
|
}
|
|
}
|
|
|
|
if (NS_FAILED(aResult)) {
|
|
aResult = mIndex ? NS_ERROR_FILE_CORRUPTED : NS_ERROR_FILE_NOT_FOUND;
|
|
SetError(aResult);
|
|
mBuf->SetDataSize(0);
|
|
}
|
|
|
|
mState = READY;
|
|
mListener.swap(listener);
|
|
}
|
|
|
|
listener->OnChunkRead(aResult, this);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
CacheFileChunk::OnFileDoomed(CacheFileHandle *aHandle, nsresult aResult)
|
|
{
|
|
MOZ_CRASH("CacheFileChunk::OnFileDoomed should not be called!");
|
|
return NS_ERROR_UNEXPECTED;
|
|
}
|
|
|
|
nsresult
|
|
CacheFileChunk::OnEOFSet(CacheFileHandle *aHandle, nsresult aResult)
|
|
{
|
|
MOZ_CRASH("CacheFileChunk::OnEOFSet should not be called!");
|
|
return NS_ERROR_UNEXPECTED;
|
|
}
|
|
|
|
nsresult
|
|
CacheFileChunk::OnFileRenamed(CacheFileHandle *aHandle, nsresult aResult)
|
|
{
|
|
MOZ_CRASH("CacheFileChunk::OnFileRenamed should not be called!");
|
|
return NS_ERROR_UNEXPECTED;
|
|
}
|
|
|
|
bool
|
|
CacheFileChunk::IsKilled()
|
|
{
|
|
return mFile->IsKilled();
|
|
}
|
|
|
|
bool
|
|
CacheFileChunk::IsReady() const
|
|
{
|
|
return (NS_SUCCEEDED(mStatus) && (mState == READY || mState == WRITING));
|
|
}
|
|
|
|
bool
|
|
CacheFileChunk::IsDirty() const
|
|
{
|
|
AssertOwnsLock();
|
|
|
|
return mIsDirty;
|
|
}
|
|
|
|
nsresult
|
|
CacheFileChunk::GetStatus()
|
|
{
|
|
AssertOwnsLock();
|
|
|
|
return mStatus;
|
|
}
|
|
|
|
void
|
|
CacheFileChunk::SetError(nsresult aStatus)
|
|
{
|
|
LOG(("CacheFileChunk::SetError() [this=%p, status=0x%08" PRIx32 "]",
|
|
this, static_cast<uint32_t>(aStatus)));
|
|
|
|
MOZ_ASSERT(NS_FAILED(aStatus));
|
|
|
|
if (NS_FAILED(mStatus)) {
|
|
// Remember only the first error code.
|
|
return;
|
|
}
|
|
|
|
mStatus = aStatus;
|
|
}
|
|
|
|
CacheFileChunkReadHandle
|
|
CacheFileChunk::GetReadHandle()
|
|
{
|
|
LOG(("CacheFileChunk::GetReadHandle() [this=%p]", this));
|
|
|
|
AssertOwnsLock();
|
|
|
|
MOZ_RELEASE_ASSERT(mState == READY || mState == WRITING);
|
|
// We don't release the lock when writing the data and CacheFileOutputStream
|
|
// doesn't get the read handle, so there cannot be a write handle when read
|
|
// handle is obtained.
|
|
MOZ_RELEASE_ASSERT(!mBuf->WriteHandleExists());
|
|
|
|
return CacheFileChunkReadHandle(mBuf);
|
|
}
|
|
|
|
CacheFileChunkWriteHandle
|
|
CacheFileChunk::GetWriteHandle(uint32_t aEnsuredBufSize)
|
|
{
|
|
LOG(("CacheFileChunk::GetWriteHandle() [this=%p, ensuredBufSize=%u]",
|
|
this, aEnsuredBufSize));
|
|
|
|
AssertOwnsLock();
|
|
|
|
if (NS_FAILED(mStatus)) {
|
|
return CacheFileChunkWriteHandle(nullptr); // dummy handle
|
|
}
|
|
|
|
nsresult rv;
|
|
|
|
// We don't support multiple write handles
|
|
MOZ_RELEASE_ASSERT(!mBuf->WriteHandleExists());
|
|
|
|
if (mBuf->ReadHandlesCount()) {
|
|
LOG(("CacheFileChunk::GetWriteHandle() - cloning buffer because of existing"
|
|
" read handle"));
|
|
|
|
MOZ_RELEASE_ASSERT(mState != READING);
|
|
RefPtr<CacheFileChunkBuffer> newBuf = new CacheFileChunkBuffer(this);
|
|
rv = newBuf->EnsureBufSize(std::max(aEnsuredBufSize, mBuf->DataSize()));
|
|
if (NS_SUCCEEDED(rv)) {
|
|
newBuf->CopyFrom(mBuf);
|
|
mOldBufs.AppendElement(mBuf);
|
|
mBuf = newBuf;
|
|
}
|
|
} else {
|
|
rv = mBuf->EnsureBufSize(aEnsuredBufSize);
|
|
}
|
|
|
|
if (NS_FAILED(rv)) {
|
|
SetError(NS_ERROR_OUT_OF_MEMORY);
|
|
return CacheFileChunkWriteHandle(nullptr); // dummy handle
|
|
}
|
|
|
|
return CacheFileChunkWriteHandle(mBuf);
|
|
}
|
|
|
|
// Memory reporting
|
|
|
|
size_t
|
|
CacheFileChunk::SizeOfExcludingThis(mozilla::MallocSizeOf mallocSizeOf) const
|
|
{
|
|
size_t n = mBuf->SizeOfIncludingThis(mallocSizeOf);
|
|
|
|
if (mReadingStateBuf) {
|
|
n += mReadingStateBuf->SizeOfIncludingThis(mallocSizeOf);
|
|
}
|
|
|
|
for (uint32_t i = 0; i < mOldBufs.Length(); ++i) {
|
|
n += mOldBufs[i]->SizeOfIncludingThis(mallocSizeOf);
|
|
}
|
|
|
|
n += mValidityMap.SizeOfExcludingThis(mallocSizeOf);
|
|
|
|
return n;
|
|
}
|
|
|
|
size_t
|
|
CacheFileChunk::SizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf) const
|
|
{
|
|
return mallocSizeOf(this) + SizeOfExcludingThis(mallocSizeOf);
|
|
}
|
|
|
|
bool
|
|
CacheFileChunk::CanAllocate(uint32_t aSize) const
|
|
{
|
|
if (!mLimitAllocation) {
|
|
return true;
|
|
}
|
|
|
|
LOG(("CacheFileChunk::CanAllocate() [this=%p, size=%u]", this, aSize));
|
|
|
|
uint32_t limit = CacheObserver::MaxDiskChunksMemoryUsage(mIsPriority);
|
|
if (limit == 0) {
|
|
return true;
|
|
}
|
|
|
|
uint32_t usage = ChunksMemoryUsage();
|
|
if (usage + aSize > limit) {
|
|
LOG(("CacheFileChunk::CanAllocate() - Returning false. [this=%p]", this));
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void
|
|
CacheFileChunk::BuffersAllocationChanged(uint32_t aFreed, uint32_t aAllocated)
|
|
{
|
|
uint32_t oldBuffersSize = mBuffersSize;
|
|
mBuffersSize += aAllocated;
|
|
mBuffersSize -= aFreed;
|
|
|
|
DoMemoryReport(sizeof(CacheFileChunk) + mBuffersSize);
|
|
|
|
if (!mLimitAllocation) {
|
|
return;
|
|
}
|
|
|
|
ChunksMemoryUsage() -= oldBuffersSize;
|
|
ChunksMemoryUsage() += mBuffersSize;
|
|
LOG(("CacheFileChunk::BuffersAllocationChanged() - %s chunks usage %u "
|
|
"[this=%p]", mIsPriority ? "Priority" : "Normal",
|
|
static_cast<uint32_t>(ChunksMemoryUsage()), this));
|
|
}
|
|
|
|
mozilla::Atomic<uint32_t, ReleaseAcquire>& CacheFileChunk::ChunksMemoryUsage() const
|
|
{
|
|
static mozilla::Atomic<uint32_t, ReleaseAcquire> chunksMemoryUsage(0);
|
|
static mozilla::Atomic<uint32_t, ReleaseAcquire> prioChunksMemoryUsage(0);
|
|
return mIsPriority ? prioChunksMemoryUsage : chunksMemoryUsage;
|
|
}
|
|
|
|
} // namespace net
|
|
} // namespace mozilla
|