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// OSSP-03.cpp: определяет точку входа для консольного приложения.
//
 
#include "stdafx.h"
#include <stdlib.h>
#include <time.h>
#include <process.h>
#include <windows.h>
 
const unsigned int S = 500 * 1024 * 1024/sizeof (int);
struct param{
    char* name; int num; int count;
};
void create_file(char*);
unsigned int _stdcall search_number(void*);
int _tmain(int argc, _TCHAR* argv[])
{
    unsigned int sr[5];
    HANDLE handle[5];
    struct param par1 = { "demo01.bin", 5, 0 };
    struct param par2 = { "demo02.bin", 121, 0 };
    struct param par3 = { "demo03.bin", 157, 0 };
    struct param par4 = { "demo04.bin", 213, 0 };
    struct param par5 = { "demo05.bin", 307, 0 };
    srand((unsigned int)time(NULL));
    /*create_file("demo01.bin");
    create_file("demo02.bin");
    create_file("demo03.bin");
    create_file("demo04.bin");
    create_file("demo05.bin");*/
    //search_number(&par1);
    handle[0] = (HANDLE)_beginthreadex(NULL, 0, search_number, &par1, 0, &sr[0]);
    handle[1] = (HANDLE)_beginthreadex(NULL, 0, search_number, &par2, 0, &sr[1]);
    handle[2] = (HANDLE)_beginthreadex(NULL, 0, search_number, &par3, 0, &sr[2]);
    handle[3] = (HANDLE)_beginthreadex(NULL, 0, search_number, &par4, 0, &sr[3]);
    handle[4] = (HANDLE)_beginthreadex(NULL, 0, search_number, &par5, 0, &sr[4]);
    WaitForMultipleObjects(5, handle, TRUE, INFINITE);
    printf("%d\n", par1.count);
    printf("%d\n", par2.count);
    printf("%d\n", par3.count);
    printf("%d\n", par4.count);
    printf("%d\n", par5.count);
    
    return 0;
}
 
void create_file(char* name)
{
    FILE *f;
    errno_t err;
    int number;
    err = fopen_s(&f, name, "wb");
    for (unsigned int i = 0; i < S; i++)
    {
        number = rand();
        fwrite(&number, sizeof(int), 1, f);
        if (i % 10000 == 0)
            printf("%f\n", i*1.0 / S);
    }
    fclose(f);
}
 
unsigned int _stdcall search_number(void* p)
{
    DWORD t = GetTickCount();
    FILE *f;
    int number, i = 0, *mas;
    size_t N;
    errno_t err;
    mas = (int*)calloc(25600, sizeof(int));
    struct param* pr = (struct param*)p;
    err = fopen_s(&f,pr-> name, "rb");
    if (err == 0)
    {
        printf("filename %s\n", pr->name);
        do
        {
            N = fread(mas, sizeof(int), 25600, f);
            //printf("N= %d filename %s\n", N, pr->name);
            for (int j = 0; j < N; j++)
            {
                if (mas[j] == pr->num)
                    pr->count++;
            }
            //if (++i % 10000 == 0)
            //  printf("%f\n", i*1.0 / S);
 
        } while (N);
    }
 
    printf("N= %d filename %s\n", N, pr->name);
    free(mas);
    fclose(f);
    printf("time= %d filename %s\n", GetTickCount() - t, pr->name);
    return 0;
}