| Updated: April 19, 2023 |
Unlock the address space of a process
#include <sys/mman.h>
int munlock(const void * addr,
size_t len);
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The munlock() function unlocks the whole pages containing any part of the address space of the process starting at address addr and continuing for len bytes, regardless of how many times mlock() has been called by the process for any of the pages in the specified range. The addr must be a multiple of PAGESIZE, which depends on the target platform.
If any of the pages in the range specified to a call to munlock() are also mapped into the address spaces of other processes, any locks established on those pages by another process are unaffected by the call of this process to munlock(). If any of the pages in the range specified by a call to munlock() are also mapped into other portions of the address space of the calling process outside the range specified, any locks established on those pages via the other mappings are also unaffected by this call.
| Safety: | |
|---|---|
| Cancellation point | No |
| Interrupt handler | No |
| Signal handler | Yes |
| Thread | Yes |