--- a/c/mmap/Makefile	Sun May 11 03:52:24 2014 +0900
+++ b/c/mmap/Makefile	Sun May 11 18:14:02 2014 +0900
@@ -8,3 +8,6 @@
 	rm -f $(TARGET)
 	rm -r $(TARGET).dSYM
 	rm -f *~ \#*
+
+test:
+	./mmap -file main.cc

--- a/c/mmap/main.cc	Sun May 11 03:52:24 2014 +0900
+++ b/c/mmap/main.cc	Sun May 11 18:14:02 2014 +0900
@@ -1,52 +1,23 @@
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <unistd.h>
 #include <fcntl.h>
-#include <string.h>
-#include <stdbool.h>
 #include <sys/stat.h>
-#include <sys/time.h>
 #include <sys/types.h>
-#include "read.h"
-
-static double st_time;
-static double ed_time;
+#include <sys/mman.h>
 
-/*
- * -b : bulk read 一括read
- * -d : divide read 分割read (default)
- */
-const char *usr_help_str = "Usage : ./read_lseek [-file filename] [-b -d]";
-const int ONE_TASK_READ_SIZE = 4096 * 1;
-bool bulk_flag = true;
-bool divide_flag = false;
 
-void result_printf(int,char *);
-void divide_read(int,char*,read_t);
-void bulk_read(int,char*,read_t);
-
-static double
-get_time(){
-    struct timeval tv;
-    gettimeofday(&tv,NULL);
-    return tv.tv_sec + (double)tv.tv_usec*1e-6;
-}
+const char *usr_help_str = "Usage : ./mmap [-file filename]";
 
 int main(int argc, char *argv[]){
 
     struct stat sb;
-    read_t r;
 
     char *filename = 0;
     for (int i = 1; argv[i]; ++i) {
         if (strcmp(argv[i], "-file") == 0){
-            filename = argv[i+1];
-        }else if(strcmp(argv[i], "-b") == 0){
-            bulk_flag = true;
-            divide_flag = false;
-        }else if(strcmp(argv[i], "-d") == 0){
-            bulk_flag = false;
-            divide_flag = true;
+            filename = argv[i+1]; i++;
         }
     }
 
@@ -55,8 +26,6 @@
         exit(1);
     }
 
-    st_time = get_time();
-
     int fd = -1;
     if ((fd=open(filename,O_RDONLY,0666))==0){
         fprintf(stderr,"can't open %s\n",filename);
@@ -66,54 +35,13 @@
         fprintf(stderr,"can't open %s\n",filename);
     }
 
-    r.text_size = sb.st_size;
-    char *text = (char *)malloc(sizeof(char)*r.text_size);
-
-    r.one_task_read_size = ONE_TASK_READ_SIZE;
-
-    r.task_num = r.text_size / r.one_task_read_size;
-    r.task_num += ((r.text_size % r.one_task_read_size) != 0);
+    int text_size = sb.st_size;
+    char *text = (char *)mmap(0, text_size, PROT_READ, MAP_PRIVATE, fd, 0);
 
-    if(bulk_flag == true){
-        bulk_read(fd,text,r);
-    }else if(divide_flag == true){
-        divide_read(fd,text,r);
-    }
+    printf("%s\n",text);
 
-    free(text);
+    munmap(text, text_size);
     close(fd);
 
-    ed_time = get_time();
-    printf("Time: %0.6f\n",ed_time-st_time);
-
     return 0;
 }
-
-/* lseekで読む場所を指定してあげないといけないと思ったが、
- * readで読み込むだけでも読み込む場所が変わってくれるらしい。
- */
-void divide_read(int _fd,char* _text,read_t _r){
-    for(int i = 0; i < _r.task_num; i++){
-        //lseek(_fd, i * _r.one_task_read_size,SEEK_SET);
-        read(_fd,_text,_r.one_task_read_size);
-        result_printf(i,_text);
-    }
-    puts("divide read");
-    printf("text size    :%lu\n",_r.text_size);
-    printf("one task size:%d\n",_r.one_task_read_size);
-    printf("task num     :%d\n",_r.task_num);
-}
-
-void bulk_read(int _fd,char* _text,read_t _r){
-    int i = 0;
-    read(_fd,_text,_r.text_size);
-    result_printf(i,_text);
-    puts("bulk read");
-    printf("text size    :%lu\n",_r.text_size);
-}
-
-void result_printf(int _i,char *_text){
-    //printf("-------%d--------\n",_i + 1);
-    printf("[task No. %d]%s\n",_i,_text);
-    //printf("-----------------\n\n");
-}