68 lines
1.6 KiB
C++
68 lines
1.6 KiB
C++
/*
|
|
* Copyright (C) 2010 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.
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include "AmlMpAtomizer.h"
|
|
|
|
namespace aml_mp {
|
|
|
|
// static
|
|
AmlMpAtomizer AmlMpAtomizer::gAtomizer;
|
|
|
|
// static
|
|
const char *AmlMpAtomizer::Atomize(const char *name) {
|
|
return gAtomizer.atomize(name);
|
|
}
|
|
|
|
AmlMpAtomizer::AmlMpAtomizer() {
|
|
for (size_t i = 0; i < 128; ++i) {
|
|
mAtoms.push_back(std::list<std::string>());
|
|
}
|
|
}
|
|
|
|
const char *AmlMpAtomizer::atomize(const char *name) {
|
|
std::lock_guard<std::mutex> autoLock(mLock);
|
|
|
|
const size_t n = mAtoms.size();
|
|
size_t index = AmlMpAtomizer::Hash(name) % n;
|
|
std::list<std::string> &entry = mAtoms.at(index);
|
|
std::list<std::string>::iterator it = entry.begin();
|
|
while (it != entry.end()) {
|
|
if ((*it) == name) {
|
|
return (*it).c_str();
|
|
}
|
|
++it;
|
|
}
|
|
|
|
entry.push_back(std::string(name));
|
|
|
|
return (*--entry.end()).c_str();
|
|
}
|
|
|
|
// static
|
|
uint32_t AmlMpAtomizer::Hash(const char *s) {
|
|
uint32_t sum = 0;
|
|
while (*s != '\0') {
|
|
sum = (sum * 31) + *s;
|
|
++s;
|
|
}
|
|
|
|
return sum;
|
|
}
|
|
|
|
} // namespace android
|