e9bea2a182
TinyHashMap used hash_t(key) to generate hashcode. This would not work for 64-bit pointers as hash_t is declared as an uint32_t. Replaced the hash_t(key) call to more generic android::hash_type(key). This function is a template function declared in TypeHelpers.h and has a version available for all data types including pointers. Change-Id: I612cf18b49ca7c30b63f9d6938df68fed7d80d08 Signed-off-by: Ashok Bhat <ashok.bhat@arm.com>
71 lines
1.9 KiB
C++
71 lines
1.9 KiB
C++
/*
|
|
* Copyright (C) 2013 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#ifndef ANDROID_HWUI_TINYHASHMAP_H
|
|
#define ANDROID_HWUI_TINYHASHMAP_H
|
|
|
|
#include <utils/BasicHashtable.h>
|
|
|
|
namespace android {
|
|
namespace uirenderer {
|
|
|
|
/**
|
|
* A very simple hash map that doesn't allow duplicate keys, overwriting the older entry.
|
|
*/
|
|
template <typename TKey, typename TValue>
|
|
class TinyHashMap {
|
|
public:
|
|
typedef key_value_pair_t<TKey, TValue> TEntry;
|
|
|
|
/**
|
|
* Puts an entry in the hash, removing any existing entry with the same key
|
|
*/
|
|
void put(TKey key, TValue value) {
|
|
hash_t hash = android::hash_type(key);
|
|
|
|
ssize_t index = mTable.find(-1, hash, key);
|
|
if (index != -1) {
|
|
mTable.removeAt(index);
|
|
}
|
|
|
|
TEntry initEntry(key, value);
|
|
mTable.add(hash, initEntry);
|
|
}
|
|
|
|
/**
|
|
* Return true if key is in the map, in which case stores the value in the output ref
|
|
*/
|
|
bool get(TKey key, TValue& outValue) {
|
|
hash_t hash = android::hash_type(key);
|
|
ssize_t index = mTable.find(-1, hash, key);
|
|
if (index == -1) {
|
|
return false;
|
|
}
|
|
outValue = mTable.entryAt(index).value;
|
|
return true;
|
|
}
|
|
|
|
void clear() { mTable.clear(); }
|
|
|
|
private:
|
|
BasicHashtable<TKey, TEntry> mTable;
|
|
};
|
|
|
|
}; // namespace uirenderer
|
|
}; // namespace android
|
|
|
|
#endif // ANDROID_HWUI_TINYHASHMAP_H
|