IOS gets current device available memory and current app occupied memory

// Get header files for current device available memory and occupied memory

#import <sys/sysctl.h>

#import <mach/mach.h>

//   get current device available memory ( units: mb )

-(double) availablememory

{

&NBSP;  vm_statistics_data_t vmstats;

&NBSP;  mach_msg_type_number_t infocount =  host_vm_info_count

&NBSP;  kernreturn =  host_statistics ( mach_host _self (), 

                                               host_vm_info ,  

                                                (host_info_t ) &vmstats, 

&infocount);

   if   (Kernreturn!= kern_success ) {

return nsnotfound;

}

  

   return   (free_count )/ 1024.0 )/  1024.0 ;

}

// Gets the memory occupied by the current task inmegabytes (MB)

-(double) usedmemory

{

task_basic_info_data_t taskinfo;

&NBSP;  mach_msg_type_number_t infocount =  task_basic_info_count ;

   task_info (

                                         

                                          (

&infocount);

if (Kernreturn! = kern_success

) {

return nsnotfound;

}

  

   return  taskinfo. 1024.0  /  1024.0 ;

}