Webすることの利点は何ですか: shm_openはmmap従った? 通常のファイルを作成してから、そのfdをmmap渡してみませんか? 私はshm_openの利点を見ることができません - これらは単なる参照です、そうではありませんか?. 私は家族全員の男を読みました。 私には、「秘密」が盗聴行為にあると思われ ... WebEach open() of a file creates a new open file description; thus, there may be multiple open file descriptions corresponding to a file inode. On Linux, one can use the kcmp(2) KCMP_FILE operation to test whether two file descriptors (in the same process or in two different processes) refer to the same open file description.
c - Why use shm_open? - Stack Overflow
http://www.yosbits.com/opensonar/rest/man/freebsd/man/ja/man2/shm_open.2.html http://www.yosbits.com/opensonar/rest/man/freebsd/man/ja/man2/shm_open.2.html duth ptde
How to use shared memory with Linux in C - Stack Overflow
Web33. If you open and mmap () a regular file, data will end up in that file. If you just need to share a memory region, without the need to persist the data, which incurs extra I/O overhead, use shm_open (). Such a memory region would also allow you to store other kinds of objects such as mutexes or semaphores, which you can't store in a mmap ... Web14 Jan 2024 · The name of the shared memory object that you want to open. (QNX Neutrino 7.0 or later) As a QNX Neutrino extension, you can specify this as SHM_ANON if you want to create an anonymous shared memory object. For more information, see below. oflag A combination of the following bits (defined in ): O_RDONLY — open for read … Web1 Mar 2015 · shm_open belongs to the POSIX shared memory API; shmat belongs to the older SysV shared memory API. POSIX shm uses file descriptors. SysV shm uses … duth phyed eclass