xbmc/platform/darwin/MemUtils.cpp

   1 /*
   2  *  Copyright (C) 2005-2018 Team Kodi
   3  *  This file is part of Kodi - https://kodi.tv
   4  *
   5  *  SPDX-License-Identifier: GPL-2.0-or-later
   6  *  See LICENSES/README.md for more information.
   7  */
   8
   9 #include "utils/MemUtils.h"
  10
  11 #include <array>
  12 #include <cstdlib>
  13 #include <cstring>
  14 #include <stdio.h>
  15
  16 #include <mach/mach.h>
  17 #include <sys/sysctl.h>
  18 #include <sys/types.h>
  19 #include <unistd.h>
  20
  21 namespace KODI
  22 {
  23 namespace MEMORY
  24 {
  25
  26 void* AlignedMalloc(size_t s, size_t alignTo)
  27 {
  28   void* p;
  29   posix_memalign(&p, alignTo, s);
  30
  31   return p;
  32 }
  33
  34 void AlignedFree(void* p)
  35 {
  36   free(p);
  37 }
  38
  39 void GetMemoryStatus(MemoryStatus* buffer)
  40 {
  41   if (!buffer)
  42     return;
  43
  44   uint64_t physmem;
  45   size_t len = sizeof physmem;
  46
  47 #if defined(__apple_build_version__) && __apple_build_version__ < 10000000
  48 #pragma clang diagnostic push
  49 #pragma clang diagnostic ignored "-Wmissing-braces"
  50 #endif
  51   std::array<int, 2> mib =
  52   {
  53     CTL_HW,
  54     HW_MEMSIZE,
  55   };
  56 #if defined(__apple_build_version__) && __apple_build_version__ < 10000000
  57 #pragma clang diagnostic pop
  58 #endif
  59
  60   // Total physical memory.
  61   if (sysctl(mib.data(), mib.size(), &physmem, &len, nullptr, 0) == 0 && len == sizeof(physmem))
  62     buffer->totalPhys = physmem;
  63
  64   // In use.
  65   mach_port_t stat_port = mach_host_self();
  66   vm_statistics_data_t vm_stat;
  67   mach_msg_type_number_t count = sizeof(vm_stat) / sizeof(natural_t);
  68   if (host_statistics(stat_port, HOST_VM_INFO, reinterpret_cast<host_info_t>(&vm_stat), &count) == 0)
  69   {
  70     // Find page size.
  71 #if defined(TARGET_DARWIN_IOS)
  72     // on ios with 64bit ARM CPU the page size is wrongly given as 16K
  73     // when using the sysctl approach. We can use the host_page_size
  74     // function instead which will give the proper 4k pagesize
  75     // on both 32 and 64 bit ARM CPUs
  76     vm_size_t pageSize;
  77     host_page_size(stat_port, &pageSize);
  78 #else
  79     int pageSize;
  80     mib[0] = CTL_HW;
  81     mib[1] = HW_PAGESIZE;
  82     len = sizeof(int);
  83     if (sysctl(mib.data(), mib.size(), &pageSize, &len, nullptr, 0) == 0)
  84 #endif
  85     {
  86       uint64_t used = (vm_stat.active_count + vm_stat.inactive_count + vm_stat.wire_count) * pageSize;
  87       buffer->availPhys = buffer->totalPhys - used;
  88     }
  89   }
  90 }
  91
  92 }
  93 }