使用 C 在 Linux 中共享内存
Share Memory in Linux using C
即使当前有其他进程打开共享内存，使用shm_unlink是否安全？
例如：
进程 B shm_open，然后是进程 A shm_unlink。流程 B 可以吗？
是的，如果另一个进程已打开，调用 shm_unlink 是安全的。根据 shm_unlink 的手册页：
The operation of shm_unlink() is analogous to unlink(2): it removes a
shared memory object name, and, once all processes have unmapped the
object, de-allocates and destroys the contents of the associated
memory region. After a successful shm_unlink(), attempts to shm_open()
an object with the same name will fail (unless O_CREAT was specified,
in which case a new, distinct object is created).
即使当前有其他进程打开共享内存，使用shm_unlink是否安全？
例如：
进程 B shm_open，然后是进程 A shm_unlink。流程 B 可以吗？
是的，如果另一个进程已打开，调用 shm_unlink 是安全的。根据 shm_unlink 的手册页：
The operation of shm_unlink() is analogous to unlink(2): it removes a shared memory object name, and, once all processes have unmapped the object, de-allocates and destroys the contents of the associated memory region. After a successful shm_unlink(), attempts to shm_open() an object with the same name will fail (unless O_CREAT was specified, in which case a new, distinct object is created).