Revision: 20979
Author: [email protected]
Date: Fri Apr 25 12:59:07 2014 UTC
Log: Reland r20960: "HashTable::EnsureCapacity() handlified."
[email protected]
Review URL: https://codereview.chromium.org/256743002
http://code.google.com/p/v8/source/detail?r=20979
Modified:
/branches/bleeding_edge/src/objects.cc
/branches/bleeding_edge/src/objects.h
=======================================
--- /branches/bleeding_edge/src/objects.cc Fri Apr 25 11:00:37 2014 UTC
+++ /branches/bleeding_edge/src/objects.cc Fri Apr 25 12:59:07 2014 UTC
@@ -14673,7 +14673,9 @@
template<typename Derived, typename Shape, typename Key>
-void HashTable<Derived, Shape, Key>::Rehash(Derived* new_table, Key key) {
+void HashTable<Derived, Shape, Key>::Rehash(
+ Handle<Derived> new_table,
+ Key key) {
ASSERT(NumberOfElements() < new_table->Capacity());
DisallowHeapAllocation no_gc;
@@ -14775,49 +14777,35 @@
template<typename Derived, typename Shape, typename Key>
-MaybeObject* HashTable<Derived, Shape, Key>::EnsureCapacity(
+Handle<Derived> HashTable<Derived, Shape, Key>::EnsureCapacity(
+ Handle<Derived> table,
int n,
Key key,
PretenureFlag pretenure) {
- int capacity = Capacity();
- int nof = NumberOfElements() + n;
- int nod = NumberOfDeletedElements();
+ Isolate* isolate = table->GetIsolate();
+ int capacity = table->Capacity();
+ int nof = table->NumberOfElements() + n;
+ int nod = table->NumberOfDeletedElements();
// Return if:
// 50% is still free after adding n elements and
// at most 50% of the free elements are deleted elements.
if (nod <= (capacity - nof) >> 1) {
int needed_free = nof >> 1;
- if (nof + needed_free <= capacity) return this;
+ if (nof + needed_free <= capacity) return table;
}
const int kMinCapacityForPretenure = 256;
bool should_pretenure = pretenure == TENURED ||
- ((capacity > kMinCapacityForPretenure)
&& !GetHeap()->InNewSpace(this));
- Object* obj;
- { MaybeObject* maybe_obj =
- Allocate(GetHeap(),
- nof * 2,
- USE_DEFAULT_MINIMUM_CAPACITY,
- should_pretenure ? TENURED : NOT_TENURED);
- if (!maybe_obj->ToObject(&obj)) return maybe_obj;
- }
-
- Rehash(Derived::cast(obj), key);
- return Derived::cast(obj);
-}
-
+ ((capacity > kMinCapacityForPretenure) &&
+ !isolate->heap()->InNewSpace(*table));
+ Handle<Derived> new_table = HashTable::New(
+ isolate,
+ nof * 2,
+ USE_DEFAULT_MINIMUM_CAPACITY,
+ should_pretenure ? TENURED : NOT_TENURED);
-template<typename Derived, typename Shape, typename Key>
-Handle<Derived> HashTable<Derived, Shape, Key>::EnsureCapacity(
- Handle<Derived> table,
- int n,
- Key key,
- PretenureFlag pretenure) {
- Isolate* isolate = table->GetIsolate();
- CALL_HEAP_FUNCTION(
- isolate,
- static_cast<HashTable*>(*table)->EnsureCapacity(n, key, pretenure),
- Derived);
+ table->Rehash(new_table, key);
+ return new_table;
}
@@ -14842,13 +14830,13 @@
bool pretenure =
(at_least_room_for > kMinCapacityForPretenure) &&
!isolate->heap()->InNewSpace(*table);
- Handle<Derived> new_table = New(
+ Handle<Derived> new_table = HashTable::New(
isolate,
at_least_room_for,
USE_DEFAULT_MINIMUM_CAPACITY,
pretenure ? TENURED : NOT_TENURED);
- table->Rehash(*new_table, key);
+ table->Rehash(new_table, key);
return new_table;
}
=======================================
--- /branches/bleeding_edge/src/objects.h Fri Apr 25 11:00:37 2014 UTC
+++ /branches/bleeding_edge/src/objects.h Fri Apr 25 12:59:07 2014 UTC
@@ -3722,7 +3722,7 @@
PretenureFlag pretenure = NOT_TENURED);
// Returns a new HashTable object.
- static Handle<Derived> New(
+ MUST_USE_RESULT static Handle<Derived> New(
Isolate* isolate,
int at_least_space_for,
MinimumCapacity capacity_option = USE_DEFAULT_MINIMUM_CAPACITY,
@@ -3829,6 +3829,17 @@
return (last + number) & (size - 1);
}
+ // Attempt to shrink hash table after removal of key.
+ static Handle<Derived> Shrink(Handle<Derived> table, Key key);
+
+ // Ensure enough space for n additional elements.
+ MUST_USE_RESULT static Handle<Derived> EnsureCapacity(
+ Handle<Derived> table,
+ int n,
+ Key key,
+ PretenureFlag pretenure = NOT_TENURED);
+
+ private:
// Returns _expected_ if one of entries given by the first _probe_
probes is
// equal to _expected_. Otherwise, returns the entry given by the probe
// number _probe_.
@@ -3837,21 +3848,7 @@
void Swap(uint32_t entry1, uint32_t entry2, WriteBarrierMode mode);
// Rehashes this hash-table into the new table.
- void Rehash(Derived* new_table, Key key);
-
- // Attempt to shrink hash table after removal of key.
- static Handle<Derived> Shrink(Handle<Derived> table, Key key);
-
- // Ensure enough space for n additional elements.
- MUST_USE_RESULT MaybeObject* EnsureCapacity(
- int n,
- Key key,
- PretenureFlag pretenure = NOT_TENURED);
- static Handle<Derived> EnsureCapacity(
- Handle<Derived> table,
- int n,
- Key key,
- PretenureFlag pretenure = NOT_TENURED);
+ void Rehash(Handle<Derived> new_table, Key key);
};
--
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