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VM_MAP_LOCK(9) 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_downgradevm_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 () macro obtains an exclusive lock on map.

The () macro releases an exclusive lock on map.

The () macro obtains a read-lock on map.

The () macro releases a read-lock on map.

The () 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 () 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 () macro attempts to atomically upgrade a read-lock on map to an exclusive lock.

The () 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>.

July 19, 2003 Debian