FreeBSD Manual Pages
VM_MAP_LOCK(9) BSD Kernel Developer's Manual VM_MAP_LOCK(9) NAME vm_map_lock, vm_map_unlock, vm_map_lock_read, vm_map_unlock_read, vm_map_trylock, vm_map_trylock_read, vm_map_lock_upgrade, vm_map_lock_downgrade -- vm_map locking macros SYNOPSIS #include <sys/param.h> #include <vm/vm.h> #include <vm/vm_map.h> void vm_map_lock(vm_map_t map); void vm_map_unlock(vm_map_t map); void vm_map_lock_read(vm_map_t map); void vm_map_unlock_read(vm_map_t map); int vm_map_trylock(vm_map_t map); int vm_map_trylock_read(vm_map_t map); int vm_map_lock_upgrade(vm_map_t map); int vm_map_lock_downgrade(vm_map_t map); DESCRIPTION The vm_map_lock() macro obtains an exclusive lock on map. The vm_map_unlock() macro releases an exclusive lock on map. The vm_map_lock_read() macro obtains a read-lock on map. The vm_map_unlock_read() macro releases a read-lock on map. The vm_map_trylock() macro attempts to obtain an exclusive lock on map. It returns FALSE if the lock cannot be immediately acquired; otherwise return TRUE with the lock acquired. The vm_map_trylock_read() macro attempts to obtain a read-lock on map. It returns FALSE if the lock cannot be immediately acquired; otherwise return TRUE with the lock acquired. The vm_map_lock_upgrade() macro attempts to atomically upgrade a read- lock on map to an exclusive lock. The vm_map_lock_downgrade() macro attempts to downgrade an exclusive lock on map to a read-lock. IMPLEMENTATION NOTES Currently, all of the locking macros implement their locks as sleep locks. SEE ALSO vm_map(9) AUTHORS This manual page was written by Bruce M Simpson <bms@spc.org>. BSD July 19, 2003 BSD
NAME | SYNOPSIS | DESCRIPTION | IMPLEMENTATION NOTES | SEE ALSO | AUTHORS
Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=vm_map_lock&sektion=9&manpath=FreeBSD+13.0-RELEASE+and+Ports>