libs/pbd/malign.cc

   1 #include <cstring>
   2 #include <cerrno>
   3
   4 #include "pbd/malign.h"
   5 #include "pbd/error.h"
   6
   7 #include "i18n.h"
   8
   9 using namespace PBD;
  10
  11 #ifdef __x86_64__
  12 static const int CPU_CACHE_ALIGN = 64;
  13 #else
  14 static const int CPU_CACHE_ALIGN = 16; /* arguably 32 on most arches, but it matters less */
  15 #endif
  16
  17 int cache_aligned_malloc (void** memptr, size_t size)
  18 {
  19 #ifdef NO_POSIX_MEMALIGN
  20         if (((*memptr) = malloc (size)) == 0) {
  21                 fatal << string_compose (_("Memory allocation error: malloc (%1 * %2) failed (%3)"),
  22                                          CPU_CACHE_ALIGN, size, strerror (errno)) << endmsg;
  23                 return errno;
  24         } else {
  25                 return 0;
  26         }
  27 #else
  28         if (posix_memalign (memptr, CPU_CACHE_ALIGN, size)) {
  29                 fatal << string_compose (_("Memory allocation error: posix_memalign (%1 * %2) failed (%3)"),
  30                                          CPU_CACHE_ALIGN, size, strerror (errno)) << endmsg;
  31         }
  32
  33         return 0;
  34 #endif
  35 }