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//! This module roughly corresponds to `mach/mach_vm.defs`.

use boolean::{boolean_t};
use kern_return::{kern_return_t};
use memory_object_types::{memory_object_offset_t, memory_object_size_t};
use message::{mach_msg_type_number_t};
use port::{mach_port_t};
use mach_types::{mem_entry_name_port_t, vm_task_entry_t};
use vm_attributes::{vm_machine_attribute_t, vm_machine_attribute_val_t};
use vm_behavior::{vm_behavior_t};
use vm_inherit::{vm_inherit_t};
use vm_prot::{vm_prot_t};
use vm_purgable::{vm_purgable_t};
use vm_region::*;
use vm_sync::{vm_sync_t};
use vm_types::*;

extern "C" {
    pub fn mach_vm_allocate(target: vm_task_entry_t,
                            address: *mut mach_vm_address_t,
                            size: mach_vm_size_t,
                            flags: ::libc::c_int) -> kern_return_t;

    pub fn mach_vm_deallocate(target: vm_task_entry_t,
                              address: mach_vm_address_t,
                              size: mach_vm_size_t) -> kern_return_t;

    pub fn mach_vm_protect(target_task: vm_task_entry_t,
                           address: mach_vm_address_t,
                           size: mach_vm_size_t,
                           set_maximum: boolean_t,
                           new_protection: vm_prot_t) -> kern_return_t;

    pub fn mach_vm_inherit(target_task: vm_task_entry_t,
                           address: mach_vm_address_t,
                           size: mach_vm_size_t,
                           new_inheritance: vm_inherit_t) -> kern_return_t;

    pub fn mach_vm_read(target_task: vm_task_entry_t,
                        address: mach_vm_address_t,
                        size: mach_vm_size_t,
                        data: *mut vm_offset_t,
                        dataCnt: *mut mach_msg_type_number_t) -> kern_return_t;

    pub fn mach_vm_read_list(target_task: vm_task_entry_t,
                             data_list: mach_vm_read_entry_t,
                             count: natural_t) -> kern_return_t;

    pub fn mach_vm_write(target_task: vm_map_t,
                         address: mach_vm_address_t,
                         data: vm_offset_t,
                         dataCnt: mach_msg_type_number_t) -> kern_return_t;

    pub fn mach_vm_copy(target_task: vm_task_entry_t,
                        source_address: mach_vm_address_t,
                        size: mach_vm_size_t,
                        dest_address: mach_vm_address_t) -> kern_return_t;

    pub fn mach_vm_read_overwrite(target_task: vm_task_entry_t,
                                  address: mach_vm_address_t,
                                  size: mach_vm_size_t,
                                  data: mach_vm_address_t,
                                  outsize: *mut mach_vm_size_t) -> kern_return_t;

    pub fn mach_vm_msync(target_task: vm_task_entry_t,
                         address: mach_vm_address_t,
                         size: mach_vm_size_t,
                         sync_flags: vm_sync_t) -> kern_return_t;

    pub fn mach_vm_behavior_set(target_task: vm_task_entry_t,
                                address: mach_vm_address_t,
                                size: mach_vm_size_t,
                                new_behavior: vm_behavior_t) -> kern_return_t;

    pub fn mach_vm_map(target_task: vm_task_entry_t,
                       inout: *mut mach_vm_address_t,
                       size: mach_vm_size_t,
                       mask: mach_vm_offset_t,
                       flags: ::libc::c_int,
                       object: mem_entry_name_port_t,
                       offset: memory_object_offset_t,
                       copy: boolean_t,
                       cur_protection: vm_prot_t,
                       max_protection: vm_prot_t,
                       inheritance: vm_inherit_t) -> kern_return_t;

    pub fn mach_vm_machine_attribute(target_task: vm_task_entry_t,
                                     address: mach_vm_address_t,
                                     size: mach_vm_size_t,
                                     attribute: vm_machine_attribute_t,
                                     value: *mut vm_machine_attribute_val_t) -> kern_return_t;

    pub fn mach_vm_remap(target_task: vm_task_entry_t,
                         target_address: *mut mach_vm_address_t,
                         size: mach_vm_size_t,
                         mask: mach_vm_offset_t,
                         flags: ::libc::c_int,
                         src_task: vm_task_entry_t,
                         src_address: mach_vm_address_t,
                         copy: boolean_t,
                         cur_protection: *mut vm_prot_t,
                         out: *mut vm_prot_t,
                         inheritance: vm_inherit_t) -> kern_return_t;

    pub fn mach_vm_page_query(target_map: vm_map_t,
                              offset: mach_vm_offset_t,
                              disposition: *mut integer_t,
                              ref_count: *mut integer_t) -> kern_return_t;

    pub fn mach_vm_region_recurse(target_task: vm_task_entry_t,
                                  address: *mut mach_vm_address_t,
                                  size: *mut mach_vm_size_t,
                                  nesting_depth: *mut natural_t,
                                  info: vm_region_recurse_info_t,
                                  infoCnt: *mut mach_msg_type_number_t) -> kern_return_t;

    pub fn mach_vm_region(target_task: vm_task_entry_t,
                          address: *mut mach_vm_address_t,
                          size: *mut mach_vm_size_t,
                          flavor: vm_region_flavor_t,
                          info: vm_region_info_t,
                          infoCnt: *mut mach_msg_type_number_t,
                          object_name: *mut mach_port_t) -> kern_return_t;

    pub fn mach_make_memory_entry(target_task: vm_map_t,
                                  size: *mut vm_size_t,
                                  offset: vm_offset_t,
                                  permission: vm_prot_t,
                                  object_handle: *mut mem_entry_name_port_t,
                                  parent_handle: mem_entry_name_port_t) -> kern_return_t;

    pub fn mach_make_memory_entry_64(target_task: vm_map_t,
                                     size: *mut memory_object_size_t,
                                     offset: memory_object_offset_t,
                                     permission: vm_prot_t,
                                     object_handle: *mut mach_port_t,
                                     parent_entry: mem_entry_name_port_t) -> kern_return_t;

    pub fn mach_vm_purgable_control(target_task: vm_task_entry_t,
                                    address: mach_vm_address_t,
                                    control: vm_purgable_t,
                                    state: *mut ::libc::c_int) -> kern_return_t;

    pub fn mach_vm_page_info(target_task: vm_task_entry_t,
                             address: mach_vm_address_t,
                             flavor: vm_page_info_flavor_t,
                             info: vm_page_info_t,
                             infoCnt: *mut mach_msg_type_number_t) -> kern_return_t;
}

#[cfg(test)]
mod tests {
    use core::mem;
    use vm_types::*;
    use vm_region::*;
    use kern_return::*;
    use traps::*;
    use vm_statistics::*;
    use vm_prot::*;
    use vm::*;

    #[test]
    fn mach_vm_allocate_sanity() {
        unsafe {
            let size = 0x100;
            let task = mach_task_self();

            let mut address: mach_vm_address_t = 0;
            assert_eq!(mach_vm_allocate(task, &mut address, size, VM_FLAGS_ANYWHERE), KERN_SUCCESS);
            assert_eq!(mach_vm_deallocate(task, address, size), KERN_SUCCESS);
        }
    }

    #[test]
    fn mach_vm_region_sanity() {
        unsafe {
            let mut size = 0x10;
            let mut object_name = 0;
            let mut address = mach_vm_region_sanity as mach_vm_address_t;
            let mut info: vm_region_basic_info_64 = mem::zeroed();
            let mut info_size = vm_region_basic_info_64::count();

            let result = mach_vm_region(mach_task_self(),
                                        &mut address,
                                        &mut size,
                                        VM_REGION_BASIC_INFO_64,
                                        (&mut info as *mut _) as vm_region_info_t,
                                        &mut info_size,
                                        &mut object_name);
            assert_eq!(result, KERN_SUCCESS);
            assert_eq!(info.protection, VM_PROT_READ | VM_PROT_EXECUTE);
        }
    }
}