基於boost實現的共享內存版HashMap

基於boost實現的共享內存版HashMap

#include 
#include 
#include 
#include 
#include 

int main (int argc, char *argv[])
{
    typedef int KeyType;
    typedef float MappedType;
    typedef std::pair ValueType;
    typedef boost::interprocess::allocator ShmAlloc;
    typedef boost::unordered_map, std::equal_to, ShmAlloc> ShmHashMap;

    boost::interprocess::managed_shared_memory segment(boost::interprocess::open_or_create, "ContainerSharedMemory", 65536);
    ShmHashMap *hash_map1 = segment.find_or_construct("ShmHashMap1")(3, boost::hash(), std::equal_to(), segment.get_allocator());    
    ShmHashMap *hash_map2 = segment.find_or_construct("ShmHashMap2")(3, boost::hash(), std::equal_to(), segment.get_allocator());    

    for(int i = 0; i < 5; ++i) {
        ShmHashMap::iterator iter = hash_map1->find(i);
        if (iter != hash_map1->end()) {
            std::cout << "[ShmHashMap1]<" << i << ", " << iter->second << ">" << std::endl;
            iter->second += 1.0;
        }   
        hash_map1->insert(ValueType(i, (MappedType)i));
    }   
    for(int i = 0; i < 5; ++i) {
        ShmHashMap::iterator iter = hash_map2->find(i);
        if (iter != hash_map2->end()) {
            std::cout << "[ShmHashMap2]<" << i << ", " << iter->second << ">" << std::endl;
            iter->second += 2.0;
        }   
        hash_map2->insert(ValueType(i, (MappedType)i));
    }   

    return 0;
}