// Copyright 2011 the V8 project authors. All rights reserved. // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: // // * Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // * 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. // * Neither the name of Google Inc. 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT // OWNER OR 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. #ifndef V8_ZONE_INL_H_ #define V8_ZONE_INL_H_ #include "isolate.h" #include "zone.h" #include "v8-counters.h" namespace v8 { namespace internal { AssertNoZoneAllocation::AssertNoZoneAllocation() : prev_(Isolate::Current()->zone_allow_allocation()) { Isolate::Current()->set_zone_allow_allocation(false); } AssertNoZoneAllocation::~AssertNoZoneAllocation() { Isolate::Current()->set_zone_allow_allocation(prev_); } inline void* Zone::New(int size) { ASSERT(Isolate::Current()->zone_allow_allocation()); ASSERT(ZoneScope::nesting() > 0); // Round up the requested size to fit the alignment. size = RoundUp(size, kAlignment); // Check if the requested size is available without expanding. Address result = position_; if ((position_ += size) > limit_) result = NewExpand(size); // Check that the result has the proper alignment and return it. ASSERT(IsAddressAligned(result, kAlignment, 0)); allocation_size_ += size; return reinterpret_cast<void*>(result); } template <typename T> T* Zone::NewArray(int length) { return static_cast<T*>(New(length * sizeof(T))); } bool Zone::excess_allocation() { return segment_bytes_allocated_ > zone_excess_limit_; } void Zone::adjust_segment_bytes_allocated(int delta) { segment_bytes_allocated_ += delta; isolate_->counters()->zone_segment_bytes()->Set(segment_bytes_allocated_); } template <typename Config> ZoneSplayTree<Config>::~ZoneSplayTree() { // Reset the root to avoid unneeded iteration over all tree nodes // in the destructor. For a zone-allocated tree, nodes will be // freed by the Zone. SplayTree<Config, ZoneListAllocationPolicy>::ResetRoot(); } // TODO(isolates): for performance reasons, this should be replaced with a new // operator that takes the zone in which the object should be // allocated. void* ZoneObject::operator new(size_t size) { return ZONE->New(static_cast<int>(size)); } void* ZoneObject::operator new(size_t size, Zone* zone) { return zone->New(static_cast<int>(size)); } inline void* ZoneListAllocationPolicy::New(int size) { return ZONE->New(size); } template <typename T> void* ZoneList<T>::operator new(size_t size) { return ZONE->New(static_cast<int>(size)); } template <typename T> void* ZoneList<T>::operator new(size_t size, Zone* zone) { return zone->New(static_cast<int>(size)); } ZoneScope::ZoneScope(Isolate* isolate, ZoneScopeMode mode) : isolate_(isolate), mode_(mode) { isolate_->zone()->scope_nesting_++; } bool ZoneScope::ShouldDeleteOnExit() { return isolate_->zone()->scope_nesting_ == 1 && mode_ == DELETE_ON_EXIT; } int ZoneScope::nesting() { return Isolate::Current()->zone()->scope_nesting_; } } } // namespace v8::internal #endif // V8_ZONE_INL_H_