55 lines
1.6 KiB
C++
55 lines
1.6 KiB
C++
// ------------------------
|
|
// Windows specific example
|
|
// curtesy of @kanonka
|
|
// ------------------------
|
|
#include <windows.h>
|
|
#include "parallel_hashmap/phmap.h"
|
|
#include <cstring>
|
|
#include <vector>
|
|
#include <ppl.h>
|
|
|
|
class srwlock {
|
|
SRWLOCK _lock;
|
|
|
|
public:
|
|
srwlock() { InitializeSRWLock(&_lock); }
|
|
void lock() { AcquireSRWLockExclusive(&_lock); }
|
|
void unlock() { ReleaseSRWLockExclusive(&_lock); }
|
|
};
|
|
|
|
using Map = phmap::parallel_flat_hash_map<std::string, int, phmap::priv::hash_default_hash<std::string>,
|
|
phmap::priv::hash_default_eq<std::string>,
|
|
std::allocator<std::pair<const std::string, int>>, 8, srwlock>;
|
|
|
|
class Dict
|
|
{
|
|
Map m_stringsMap;
|
|
|
|
public:
|
|
int addParallel(std::string&& str, volatile long* curIdx)
|
|
{
|
|
int newIndex = -1;
|
|
m_stringsMap.lazy_emplace_l(std::move(str),
|
|
[&](int& v) { newIndex = v; }, // called only when key was already present
|
|
[&](const Map::constructor& ctor) // construct value_type in place when key not present
|
|
{ newIndex = InterlockedIncrement(curIdx); ctor(std::move(str), newIndex); });
|
|
|
|
return newIndex;
|
|
}
|
|
};
|
|
|
|
int main()
|
|
{
|
|
size_t totalSize = 6000000;
|
|
std::vector<int> values(totalSize);
|
|
Dict dict;
|
|
volatile long index = 0;
|
|
concurrency::parallel_for(size_t(0), size_t(totalSize),
|
|
[&](size_t i) {
|
|
std::string s = "ab_uu_" + std::to_string(i % 1000000);
|
|
values[i] = dict.addParallel(std::move(s), &index);
|
|
});
|
|
|
|
return 0;
|
|
}
|