table of contents
|VM_MAP_FINDSPACE(9)||Kernel Developer's Manual||VM_MAP_FINDSPACE(9)|
NAME¶vm_map_findspace — find a free region within a map
#include <vm/vm_map.h> int
vm_map_findspace(vm_map_t map, vm_offset_t start, vm_size_t length, vm_offset_t *addr);
DESCRIPTION¶The vm_map_findspace() function attempts to find a region with sufficient space in the map for an object of size length at the address addr.
IMPLEMENTATION NOTES¶It is the caller's responsibility to obtain a lock on the map using vm_map_lock(9) before calling this function. This routine may call pmap_growkernel(9) to grow the kernel's address space, if and only if the mapping is being made within the kernel address space, and if insufficient space remains in the kernel_map.
RETURN VALUES¶The vm_map_findspace() function returns the value 0 if successful, and *addr will contain the first virtual address in the found region; otherwise, the value 1 is returned.
SEE ALSO¶pmap_growkernel(9), vm_map(9), vm_map_entry_resize_free(9), vm_map_lock(9)
AUTHORS¶This manual page was written by Bruce M Simpson ⟨email@example.com⟩.
|July 19, 2003||Debian|