// 需要导入#import
mach_port_t host_port;
mach_msg_type_number_t host_size;
vm_size_tpagesize;
host_port =mach_host_self();
host_size =sizeof(vm_statistics_data_t) /sizeof(integer_t);
host_page_size(host_port,&pagesize);
vm_statistics_data_t vm_stat;
if(host_statistics(host_port, HOST_VM_INFO, (host_info_t)&vm_stat, &host_size) !=KERN_SUCCESS) {
NSLog(@"Failed to fetch vm statistics");
}
/* Stats in bytes */
natural_t mem_used = (vm_stat.active_count +
vm_stat.inactive_count+
vm_stat.wire_count)*pagesize;
natural_t mem_free = vm_stat.free_count * pagesize;
natural_tmem_total =mem_used+mem_free;
NSLog(@"已用: %u 可用: %u 总共: %u", mem_used, mem_free, mem_total);
