mirror of
https://github.com/dart-lang/sdk
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99127744c6
Remove deprecated Isolate-based BitVector constructor. R=asiva@google.com Review URL: https://codereview.chromium.org//868913002 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@43136 260f80e4-7a28-3924-810f-c04153c831b5
383 lines
12 KiB
C++
383 lines
12 KiB
C++
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#ifndef VM_HANDLES_IMPL_H_
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#define VM_HANDLES_IMPL_H_
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#include "vm/heap.h"
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#include "vm/thread.h"
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#include "vm/visitor.h"
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namespace dart {
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DECLARE_DEBUG_FLAG(bool, trace_handles);
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template <int kHandleSizeInWords, int kHandlesPerChunk, int kOffsetOfRawPtr>
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void Handles<kHandleSizeInWords,
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kHandlesPerChunk,
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kOffsetOfRawPtr>::VisitObjectPointers(
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ObjectPointerVisitor* visitor) {
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// Visit all zone handles.
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HandlesBlock* block = zone_blocks_;
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while (block != NULL) {
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block->VisitObjectPointers(visitor);
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block = block->next_block();
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}
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// Visit all scoped handles.
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VisitScopedHandles(visitor);
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}
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template <int kHandleSizeInWords, int kHandlesPerChunk, int kOffsetOfRawPtr>
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void Handles<kHandleSizeInWords,
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kHandlesPerChunk,
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kOffsetOfRawPtr>::VisitScopedHandles(
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ObjectPointerVisitor* visitor) {
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HandlesBlock* block = &first_scoped_block_;
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do {
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block->VisitObjectPointers(visitor);
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if (block == scoped_blocks_) {
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return;
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}
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block = block->next_block();
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} while (block != NULL);
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UNREACHABLE();
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}
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template <int kHandleSizeInWords, int kHandlesPerChunk, int kOffsetOfRawPtr>
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void Handles<kHandleSizeInWords,
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kHandlesPerChunk,
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kOffsetOfRawPtr>::Visit(HandleVisitor* visitor) {
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// Visit all zone handles.
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HandlesBlock* block = zone_blocks_;
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while (block != NULL) {
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block->Visit(visitor);
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block = block->next_block();
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}
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// Visit all scoped handles.
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block = &first_scoped_block_;
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do {
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block->Visit(visitor);
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block = block->next_block();
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} while (block != NULL);
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}
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template <int kHandleSizeInWords, int kHandlesPerChunk, int kOffsetOfRawPtr>
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void Handles<kHandleSizeInWords,
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kHandlesPerChunk,
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kOffsetOfRawPtr>::Reset() {
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// Delete all the extra zone handle blocks allocated and reinit the first
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// zone block.
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if (zone_blocks_ != NULL) {
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DeleteHandleBlocks(zone_blocks_->next_block());
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zone_blocks_->ReInit();
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}
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// Delete all the extra scoped handle blocks allocated and reinit the first
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// scoped block.
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DeleteHandleBlocks(first_scoped_block_.next_block());
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first_scoped_block_.ReInit();
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scoped_blocks_ = &first_scoped_block_;
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}
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// Figure out the current handle scope using the current Zone and
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// allocate a handle in that scope. The function assumes that a
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// current handle scope exists. It asserts for this appropriately.
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template <int kHandleSizeInWords, int kHandlesPerChunk, int kOffsetOfRawPtr>
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uword Handles<kHandleSizeInWords,
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kHandlesPerChunk,
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kOffsetOfRawPtr>::AllocateHandle(Zone* zone) {
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#if defined(DEBUG)
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Thread* thread = Thread::Current();
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ASSERT(thread->zone() == zone);
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Isolate* isolate = thread->isolate();
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ASSERT(isolate != NULL);
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ASSERT(isolate->top_handle_scope() != NULL);
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ASSERT(isolate->no_handle_scope_depth() == 0);
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#endif // DEBUG
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Handles* handles = zone->handles();
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ASSERT(handles != NULL);
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return handles->AllocateScopedHandle();
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}
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// The function assumes that 'zone' is the current zone and asserts for
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// this appropriately.
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template <int kHandleSizeInWords, int kHandlesPerChunk, int kOffsetOfRawPtr>
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uword Handles<kHandleSizeInWords,
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kHandlesPerChunk,
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kOffsetOfRawPtr>::AllocateZoneHandle(Zone* zone) {
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#if defined(DEBUG)
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Thread* thread = Thread::Current();
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ASSERT(thread->zone() == zone);
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Isolate* isolate = thread->isolate();
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ASSERT(isolate != NULL);
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ASSERT(isolate->no_handle_scope_depth() == 0);
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#endif // DEBUG
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Handles* handles = zone->handles();
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ASSERT(handles != NULL);
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uword address = handles->AllocateHandleInZone();
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return address;
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}
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// Figure out the current zone using the current Isolate and
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// check if the specified handle has been allocated in this zone.
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template <int kHandleSizeInWords, int kHandlesPerChunk, int kOffsetOfRawPtr>
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bool Handles<kHandleSizeInWords,
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kHandlesPerChunk,
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kOffsetOfRawPtr>::IsZoneHandle(uword handle) {
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// TODO(5411412): Accessing the current isolate is a performance problem,
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// consider passing it down as a parameter.
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Isolate* isolate = Isolate::Current();
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ASSERT(isolate != NULL);
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ASSERT(isolate->current_zone() != NULL);
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Handles* handles = isolate->current_zone()->handles();
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ASSERT(handles != NULL);
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return handles->IsValidZoneHandle(handle);
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}
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template <int kHandleSizeInWords, int kHandlesPerChunk, int kOffsetOfRawPtr>
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void Handles<kHandleSizeInWords,
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kHandlesPerChunk,
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kOffsetOfRawPtr>::DeleteAll() {
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// Delete all the zone allocated handle blocks.
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// GCTrace does not need to trace this call to DeleteHandleBlocks,
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// since the individual zone deletions will be caught
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// by instrumentation in the BaseZone destructor.
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DeleteHandleBlocks(zone_blocks_);
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zone_blocks_ = NULL;
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// Delete all the scoped handle blocks.
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scoped_blocks_ = first_scoped_block_.next_block();
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DeleteHandleBlocks(scoped_blocks_);
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first_scoped_block_.ReInit();
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scoped_blocks_ = &first_scoped_block_;
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}
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template <int kHandleSizeInWords, int kHandlesPerChunk, int kOffsetOfRawPtr>
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void Handles<kHandleSizeInWords,
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kHandlesPerChunk,
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kOffsetOfRawPtr>::DeleteHandleBlocks(
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HandlesBlock* blocks) {
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while (blocks != NULL) {
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HandlesBlock* block = blocks;
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blocks = blocks->next_block();
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delete block;
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}
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}
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template <int kHandleSizeInWords, int kHandlesPerChunk, int kOffsetOfRawPtr>
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void Handles<kHandleSizeInWords,
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kHandlesPerChunk,
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kOffsetOfRawPtr>::SetupNextScopeBlock() {
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#if defined(DEBUG)
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if (FLAG_trace_handles) {
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OS::PrintErr("*** Handle Counts for (0x%" Px "):Zone = %d,Scoped = %d\n",
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reinterpret_cast<intptr_t>(this),
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CountZoneHandles(), CountScopedHandles());
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}
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#endif
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if (scoped_blocks_->next_block() == NULL) {
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scoped_blocks_->set_next_block(new HandlesBlock(NULL));
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}
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scoped_blocks_ = scoped_blocks_->next_block();
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scoped_blocks_->set_next_handle_slot(0);
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#if defined(DEBUG)
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scoped_blocks_->ZapFreeHandles();
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#endif
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}
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// Validation of the handle involves iterating through all the
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// handle blocks to check if the handle is valid, please
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// use this only in ASSERT code for verification purposes.
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template <int kHandleSizeInWords, int kHandlesPerChunk, int kOffsetOfRawPtr>
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bool Handles<kHandleSizeInWords,
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kHandlesPerChunk,
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kOffsetOfRawPtr>::IsValidScopedHandle(uword handle) const {
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const HandlesBlock* iterator = &first_scoped_block_;
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while (iterator != NULL) {
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if (iterator->IsValidHandle(handle)) {
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return true;
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}
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iterator = iterator->next_block();
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}
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return false;
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}
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template <int kHandleSizeInWords, int kHandlesPerChunk, int kOffsetOfRawPtr>
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bool Handles<kHandleSizeInWords,
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kHandlesPerChunk,
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kOffsetOfRawPtr>::IsValidZoneHandle(uword handle) const {
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const HandlesBlock* iterator = zone_blocks_;
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while (iterator != NULL) {
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if (iterator->IsValidHandle(handle)) {
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return true;
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}
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iterator = iterator->next_block();
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}
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return false;
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}
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template <int kHandleSizeInWords, int kHandlesPerChunk, int kOffsetOfRawPtr>
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void Handles<kHandleSizeInWords,
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kHandlesPerChunk,
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kOffsetOfRawPtr>::SetupNextZoneBlock() {
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#if defined(DEBUG)
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if (FLAG_trace_handles) {
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OS::PrintErr("*** Handle Counts for (0x%" Px "):Zone = %d,Scoped = %d\n",
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reinterpret_cast<intptr_t>(this),
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CountZoneHandles(), CountScopedHandles());
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}
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#endif
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zone_blocks_ = new HandlesBlock(zone_blocks_);
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ASSERT(zone_blocks_ != NULL);
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}
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#if defined(DEBUG)
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template <int kHandleSizeInWords, int kHandlesPerChunk, int kOffsetOfRawPtr>
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void Handles<kHandleSizeInWords,
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kHandlesPerChunk,
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kOffsetOfRawPtr>::VerifyScopedHandleState() {
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HandlesBlock* block = &first_scoped_block_;
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const intptr_t end_index = (kHandleSizeInWords * kHandlesPerChunk);
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do {
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if (scoped_blocks_ == block && block->next_handle_slot() <= end_index) {
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return;
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}
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block = block->next_block();
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} while (block != NULL);
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ASSERT(false);
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}
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template <int kHandleSizeInWords, int kHandlesPerChunk, int kOffsetOfRawPtr>
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void Handles<kHandleSizeInWords,
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kHandlesPerChunk,
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kOffsetOfRawPtr>::ZapFreeScopedHandles() {
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HandlesBlock* block = scoped_blocks_;
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while (block != NULL) {
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block->ZapFreeHandles();
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block = block->next_block();
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}
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}
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#endif
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template <int kHandleSizeInWords, int kHandlesPerChunk, int kOffsetOfRawPtr>
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int Handles<kHandleSizeInWords,
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kHandlesPerChunk,
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kOffsetOfRawPtr>::CountScopedHandles() const {
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int count = 0;
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const HandlesBlock* block = &first_scoped_block_;
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do {
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count += block->HandleCount();
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if (block == scoped_blocks_) {
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return count;
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}
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block = block->next_block();
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} while (block != NULL);
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UNREACHABLE();
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return 0;
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}
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template <int kHandleSizeInWords, int kHandlesPerChunk, int kOffsetOfRawPtr>
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int Handles<kHandleSizeInWords,
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kHandlesPerChunk,
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kOffsetOfRawPtr>::CountZoneHandles() const {
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int count = 0;
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const HandlesBlock* block = zone_blocks_;
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while (block != NULL) {
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count += block->HandleCount();
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block = block->next_block();
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}
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return count;
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}
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template <int kHandleSizeInWords, int kHandlesPerChunk, int kOffsetOfRawPtr>
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Handles<kHandleSizeInWords,
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kHandlesPerChunk,
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kOffsetOfRawPtr>::HandlesBlock::~HandlesBlock() {
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#if defined(DEBUG)
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ReInit();
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#endif
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}
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template <int kHandleSizeInWords, int kHandlesPerChunk, int kOffsetOfRawPtr>
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void Handles<kHandleSizeInWords,
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kHandlesPerChunk,
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kOffsetOfRawPtr>::HandlesBlock::ReInit() {
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next_handle_slot_ = 0;
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next_block_ = NULL;
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#if defined(DEBUG)
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ZapFreeHandles();
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#endif
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}
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template <int kHandleSizeInWords, int kHandlesPerChunk, int kOffsetOfRawPtr>
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void Handles<kHandleSizeInWords,
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kHandlesPerChunk,
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kOffsetOfRawPtr>::HandlesBlock::VisitObjectPointers(
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ObjectPointerVisitor* visitor) {
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ASSERT(visitor != NULL);
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for (intptr_t i = 0; i < next_handle_slot_; i += kHandleSizeInWords) {
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visitor->VisitPointer(
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reinterpret_cast<RawObject**>(&data_[i + kOffsetOfRawPtr/kWordSize]));
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}
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}
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template <int kHandleSizeInWords, int kHandlesPerChunk, int kOffsetOfRawPtr>
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void Handles<kHandleSizeInWords,
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kHandlesPerChunk,
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kOffsetOfRawPtr>::HandlesBlock::Visit(HandleVisitor* visitor) {
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ASSERT(visitor != NULL);
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for (intptr_t i = 0; i < next_handle_slot_; i += kHandleSizeInWords) {
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visitor->VisitHandle(reinterpret_cast<uword>(&data_[i]));
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}
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}
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#if defined(DEBUG)
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template <int kHandleSizeInWords, int kHandlesPerChunk, int kOffsetOfRawPtr>
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void Handles<kHandleSizeInWords,
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kHandlesPerChunk,
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kOffsetOfRawPtr>::HandlesBlock::ZapFreeHandles() {
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// Reinitialize the handle area to some uninitialized value.
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for (intptr_t i = next_handle_slot_;
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i < (kHandleSizeInWords * kHandlesPerChunk);
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i++) {
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data_[i] = kZapUninitializedWord;
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}
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}
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#endif
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template <int kHandleSizeInWords, int kHandlesPerChunk, int kOffsetOfRawPtr>
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int Handles<kHandleSizeInWords,
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kHandlesPerChunk,
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kOffsetOfRawPtr>::HandlesBlock::HandleCount() const {
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return (next_handle_slot_ / kHandleSizeInWords);
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}
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} // namespace dart
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#endif // VM_HANDLES_IMPL_H_
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