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Diffstat (limited to 'src/script/qscriptgc_p.h')
| -rw-r--r-- | src/script/qscriptgc_p.h | 321 |
1 files changed, 0 insertions, 321 deletions
diff --git a/src/script/qscriptgc_p.h b/src/script/qscriptgc_p.h deleted file mode 100644 index a1bf8c5..0000000 --- a/src/script/qscriptgc_p.h +++ /dev/null @@ -1,321 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). -** Contact: Nokia Corporation (qt-info@nokia.com) -** -** This file is part of the QtScript module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** No Commercial Usage -** This file contains pre-release code and may not be distributed. -** You may use this file in accordance with the terms and conditions -** contained in the either Technology Preview License Agreement or the -** Beta Release License Agreement. -** -** GNU Lesser General Public License Usage -** Alternatively, this file may be used under the terms of the GNU Lesser -** General Public License version 2.1 as published by the Free Software -** Foundation and appearing in the file LICENSE.LGPL included in the -** packaging of this file. Please review the following information to -** ensure the GNU Lesser General Public License version 2.1 requirements -** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. -** -** In addition, as a special exception, Nokia gives you certain -** additional rights. These rights are described in the Nokia Qt LGPL -** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this -** package. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU -** General Public License version 3.0 as published by the Free Software -** Foundation and appearing in the file LICENSE.GPL included in the -** packaging of this file. Please review the following information to -** ensure the GNU General Public License version 3.0 requirements will be -** met: http://www.gnu.org/copyleft/gpl.html. -** -** If you are unsure which license is appropriate for your use, please -** contact the sales department at http://qt.nokia.com/contact. -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#ifndef QSCRIPTGC_P_H -#define QSCRIPTGC_P_H - -// -// W A R N I N G -// ------------- -// -// This file is not part of the Qt API. It exists purely as an -// implementation detail. This header file may change from version to -// version without notice, or even be removed. -// -// We mean it. -// - -#if defined(Q_OS_VXWORKS) && defined(m_free) -# undef m_free -#endif - -#include <QtCore/qglobal.h> - -#ifndef QT_NO_SCRIPT - -#include <QtCore/QtDebug> -#include <new> - -#include "qscriptmemorypool_p.h" - -QT_BEGIN_NAMESPACE - -namespace QScript { - -class GCBlock -{ -public: - GCBlock *next; - - union { - int generation; - uint flags; - }; - -public: - inline GCBlock(GCBlock *n): - next(n), flags(0) {} - - inline void *data() - { return reinterpret_cast<char *>(this) + sizeof(GCBlock); } - - inline static GCBlock *get(void *ptr) - { - char *where = reinterpret_cast<char *>(ptr); - return reinterpret_cast<GCBlock *>(where - sizeof(GCBlock)); - } -}; - -template <typename _Tp> -class GCAlloc -{ -private: - int m_new_allocated_blocks; - int m_free_blocks; - int m_new_allocated_extra_bytes; - GCBlock *m_head; - GCBlock *m_current; - GCBlock *m_free; - bool m_blocked_gc; - bool m_force_gc; - bool m_sweeping; - MemoryPool pool; - _Tp trivial; - -public: - enum { MaxNumberOfBlocks = 1 << 14 }; - enum { MaxNumberOfExtraBytes = 0x800000 }; - -public: - inline GCAlloc(): - m_new_allocated_blocks(0), - m_free_blocks(0), - m_new_allocated_extra_bytes(0), - m_head(0), - m_current(0), - m_free(0), - m_blocked_gc(false), - m_force_gc(false), - m_sweeping(false) { - trivial.reset(); - } - - inline ~GCAlloc() { - } - - inline void destruct() { - m_sweeping = true; - GCBlock *blk = m_free; - - if (! blk) { - blk = m_head; - m_head = 0; - } - - while (blk) { - GCBlock *was = blk; - blk = blk->next; - - Q_ASSERT(was->data()); - _Tp *data = reinterpret_cast<_Tp*>(was->data()); - data->~_Tp(); - blk->~GCBlock(); - - if (! blk && m_head) { - blk = m_head; - m_head = 0; - } - } - m_sweeping = false; - } - - inline int newAllocatedBlocks() const { return m_new_allocated_blocks; } - inline int freeBlocks() const { return m_free_blocks; } - - inline _Tp *operator()(int generation) - { - GCBlock *previous = m_current; - void *where = 0; - - if (! m_free) { - Q_ASSERT (m_free_blocks == 0); - where = pool.allocate(sizeof(GCBlock) + sizeof(_Tp)); - ++m_new_allocated_blocks; - (void) new (reinterpret_cast<char*>(where) + sizeof(GCBlock)) _Tp(); - } else { - --m_free_blocks; - where = m_free; - m_free = m_free->next; - - if (! m_free) - m_force_gc = true; - } - - m_current = new (where) GCBlock(0); - - if (! previous) { - Q_ASSERT(! m_head); - m_head = m_current; - } else { - previous->next = m_current; - } - m_current->generation = generation; - - return reinterpret_cast<_Tp*> (m_current->data()); - } - - inline bool blocked() const - { - return m_blocked_gc; - } - - inline bool sweeping() const - { - return m_sweeping; - } - - inline bool blockGC(bool block) - { - bool was = m_blocked_gc; - m_blocked_gc = block; - return was; - } - - inline void requestGC() - { - m_force_gc = true; - } - - inline void adjustBytesAllocated(int bytes) - { m_new_allocated_extra_bytes += bytes; } - - inline bool poll() - { - if (m_blocked_gc || ! m_head) - return false; - - else if (m_force_gc) { - m_force_gc = false; - return true; - } - - else if (m_free && ! m_free->next) - return true; - - return (m_new_allocated_blocks >= MaxNumberOfBlocks) - || ((m_new_allocated_extra_bytes >= MaxNumberOfExtraBytes) - && (m_new_allocated_blocks > 0)); - } - - inline int generation(_Tp *ptr) const - { return GCBlock::get(ptr)->generation; } - - inline GCBlock *head() const - { return m_head; } - - void sweep(int generation) - { - m_sweeping = true; - GCBlock *blk = m_head; - m_current = 0; - - m_new_allocated_blocks = 0; - m_new_allocated_extra_bytes = 0; - - while (blk != 0) { - if (blk->generation != generation) { - if (m_current) - m_current->next = blk->next; - - GCBlock *tmp = blk; - blk = blk->next; // advance the pointer - - tmp->next = m_free; // prepend the node to the free list... - m_free = tmp; - ++m_free_blocks; - - if (m_free == m_head) - m_head = blk; - - _Tp *data = reinterpret_cast<_Tp *>(tmp->data()); - data->finalize(); - tmp->~GCBlock(); - } else { - m_current = blk; - blk = blk->next; - } - } - - if (! m_current) - m_head = m_current; - m_sweeping = false; - } - - class const_iterator - { - public: - typedef _Tp value_type; - typedef const _Tp *pointer; - typedef const _Tp &reference; - inline const_iterator() : i(0) { } - inline const_iterator(GCBlock *block) : i(block) { } - inline const_iterator(const const_iterator &o) - { i = reinterpret_cast<const const_iterator &>(o).i; } - - inline const _Tp *data() const { return reinterpret_cast<_Tp*>(i->data()); } - inline const _Tp &value() const { return *reinterpret_cast<_Tp*>(i->data()); } - inline const _Tp &operator*() const { return *reinterpret_cast<_Tp*>(i->data()); } - inline const _Tp *operator->() const { return reinterpret_cast<_Tp*>(i->data()); } - inline bool operator==(const const_iterator &o) const { return i == o.i; } - inline bool operator!=(const const_iterator &o) const { return i != o.i; } - - inline const_iterator &operator++() { - i = i->next; - return *this; - } - private: - GCBlock *i; - }; - friend class const_iterator; - - inline const_iterator constBegin() const { return const_iterator(m_head); } - inline const_iterator constEnd() const { return const_iterator(0); } - -private: - Q_DISABLE_COPY(GCAlloc) -}; - -} // namespace QScript - -QT_END_NAMESPACE - -#endif // QT_NO_SCRIPT -#endif // QSCRIPT_GC_H |