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MSYNC
Section: Linux Programmer's Manual (2)Updated: 12 April 1996
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msync - ¥Õ¥¡¥¤¥ë¤ò¥á¥â¥ê¡¦¥Þ¥Ã¥×¤ÈƱ´ü¤µ¤»¤ë½ñ¼°
#include <unistd.h>#include <sys/mman.h>
#ifdef _POSIX_MAPPED_FILES
#ifdef _POSIX_SYNCHRONIZED_IO
int msync(const void *start, size_t length, int flags);
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msync ¤Ï mmap(2) ¤ò»ÈÍѤ·¤Æ¥á¥â¥ê¤Ë¥Þ¥Ã¥×¤µ¤ì¤¿¥Õ¥¡¥¤¥ë¤Î¥á¥â¥ê¾å¤Î¥³¥Ô¡¼¤Ë¤Ê¤µ¤ì¤¿Êѹ¹¤ò ¥Ç¥£¥¹¥¯¤Ø¤ÈÈ¿±Ç¤µ¤»¤ë¡£ ¤³¤Î¥³¡¼¥ë¤ò»ÈÍѤ·¤Ê¤«¤Ã¤¿¾ì¹ç¡¢ munmap(2) ¤¬¸Æ¤Ó½Ð¤µ¤ì¤ë¤Þ¤Ç¤ÏÊѹ¹¤¬½ñ¤½Ð¤µ¤ì¤ë¤«¤É¤¦¤«¤ÏÊݾڤµ¤ì¤Ê¤¤¡£ ¤è¤êÀµ³Î¤Ë¤Ï¡¢ start ¤«¤é»Ï¤Þ¤êŤµ length ¤Î¥á¥â¥êÎΰè¤ËÂбþ¤¹¤ë¥Õ¥¡¥¤¥ëÉôʬ¤¬¹¹¿·¤µ¤ì¤ë¡£ flags °ú¤¿ô¤Ë¤Ï MS_ASYNC, MS_SYNC, MS_INVALIDATE ¥Ó¥Ã¥È¤¬ÀßÄê¤Ç¤¤ë¡£ MS_ASYNC ¤È MS_SYNC ¤òƱ»þ¤Ë¤ÏÀßÄꤷ¤Æ¤Ï¤Ê¤é¤Ê¤¤¡£ MS_ASYNC ¤Ï¹¹¿·¤òͽÄê¤ËÁȤ߹þ¤ß¥³¡¼¥ë¤«¤é¤¹¤°¤ËÌá¤ë¡£ MS_SYNC ¤Ï¹¹¿·¤¬´°Î»¤¹¤ë¤Þ¤ÇÂԤĤ³¤È¤òÍ׵᤹¤ë¡£ MS_INVALIDATE ¤ÏƱ¤¸¥Õ¥¡¥¤¥ë¤Ø¤Î¾¤Î¥Þ¥Ã¥Ô¥ó¥°¤ò̵¸ú¤Ë¤¹¤ë¤³¤È¤òÍ׵᤹¤ë¡£ (º£¡¢½ñ¤¹þ¤ó¤À¿·Á¯¤ÊÃͤǹ¹¿·¤¹¤ë¤³¤È¤¬¤Ç¤¤ë¤è¤¦¤Ë¡£)ÊÖ¤êÃÍ
À®¸ù¤·¤¿¾ì¹ç¤¬¥¼¥í¤¬ÊÖ¤µ¤ì¤ë¡£¥¨¥é¡¼¤Î¾ì¹ç¤Ï -1 ¤¬ÊÖ¤µ¤ì¡¢ errno ¤¬Å¬ÀÚ¤ËÀßÄꤵ¤ì¤ë¡£¥¨¥é¡¼
- EINVAL
- start ¤¬ PAGESIZE ¤ÎÇÜ¿ô¤Ë¤Ê¤Ã¤Æ¤¤¤Ê¤¤¤«¡¢MS_ASYNC | MS_INVALIDATE | MS_SYNC °Ê³°¤Î¥Ó¥Ã¥È¤¬ flags ¤ËÀßÄꤵ¤ì¤¿¡£
- EFAULT
-
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POSIX.1b (°ÊÁ°¤Î POSIX.4)´ØÏ¢¹àÌÜ
mmap(2), B.O. Gallmeister, POSIX.4, O'Reilly, pp. 128-129 and 389-391.