Method malloc

tests/DCPS/ZeroCopyRead/main.cpp:77–80

    int num_frees()  { return num_frees_;};

    virtual void *malloc (size_t nbytes) {
        num_allocs_++;
        return ACE_OS::malloc(nbytes);
    };
    virtual void free (void *ptr) {
        num_frees_++;
        ACE_OS::free(ptr);