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/*
* Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies)
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#if OS(SYMBIAN)
#include "RegisterFileAllocatorSymbian.h"
namespace WTF {
/** Efficiently allocates memory pools of size poolSize.
* Primarily designed for JSC RegisterFile's needs.
* Not thread-safe.
*/
RegisterFileAllocator::RegisterFileAllocator(TUint32 reservationSize, TUint32 poolSize) :
m_reserved(reservationSize), m_poolSize(poolSize)
{
// Get system's page size value.
SYMBIAN_PAGESIZE(m_pageSize);
// We only accept multiples of system page size for both initial reservation
// and the alignment/pool size
m_reserved = SYMBIAN_ROUNDUPTOMULTIPLE(m_reserved, m_pageSize);
__ASSERT_ALWAYS(SYMBIAN_ROUNDUPTOMULTIPLE(m_poolSize, m_pageSize),
User::Panic(_L("RegisterFileAllocator1"), KErrArgument));
// Open a Symbian RChunk, and reserve requested virtual address range
// Any thread in this process can operate this RChunk due to EOwnerProcess access rights.
TInt ret = m_chunk.CreateDisconnectedLocal(0 , 0, (TInt)m_reserved , EOwnerProcess);
if (ret != KErrNone)
User::Panic(_L("RegisterFileAllocator2"), ret);
m_buffer = (void*)m_chunk.Base();
m_resEnd = (void*)(m_chunk.Base() + m_chunk.MaxSize());
m_comEnd = m_buffer;
}
RegisterFileAllocator::~RegisterFileAllocator()
{
// release everything!
m_chunk.Decommit(0, m_chunk.MaxSize());
m_chunk.Close();
}
void* RegisterFileAllocator::buffer() const
{
return m_buffer;
}
void RegisterFileAllocator::grow(void* newEnd)
{
// trying to commit more memory than reserved!
if (newEnd > m_resEnd)
return;
if (newEnd > m_comEnd) {
TInt nBytes = (TInt)(newEnd) - (TInt)(m_comEnd);
nBytes = SYMBIAN_ROUNDUPTOMULTIPLE(nBytes, m_poolSize);
TInt offset = (TInt)m_comEnd - (TInt)m_buffer;
// The reserved size is not guaranteed to be a multiple of the pool size.
TInt maxBytes = (TInt)m_resEnd - (TInt)m_comEnd;
if (nBytes > maxBytes)
nBytes = maxBytes;
TInt ret = m_chunk.Commit(offset, nBytes);
if (ret == KErrNone)
m_comEnd = (void*)(m_chunk.Base() + m_chunk.Size());
else
CRASH();
}
}
void RegisterFileAllocator::shrink(void* newEnd)
{
if (newEnd < m_comEnd) {
TInt nBytes = (TInt)newEnd - (TInt)m_comEnd;
if (nBytes >= m_poolSize) {
TInt offset = SYMBIAN_ROUNDUPTOMULTIPLE((TUint)newEnd, m_poolSize) - (TInt)m_buffer;
nBytes = (TInt)m_comEnd - offset - (TInt)m_buffer;
if (nBytes > 0) {
TInt ret = m_chunk.Decommit(offset, nBytes);
if (ret == KErrNone)
m_comEnd = (void*)(m_chunk.Base() + m_chunk.Size());
}
}
}
}
} // end of namespace
#endif // SYMBIAN
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