libs/pbd/malign.cc

   1 #include "libpbd-config.h"
   2
   3 #include <cstring>
   4 #include <cerrno>
   5
   6 #include "pbd/malign.h"
   7 #include "pbd/error.h"
   8
   9 #include "i18n.h"
  10
  11 using namespace PBD;
  12
  13 #ifdef __x86_64__
  14 static const int CPU_CACHE_ALIGN = 64;
  15 #else
  16 static const int CPU_CACHE_ALIGN = 16; /* arguably 32 on most arches, but it matters less */
  17 #endif
  18
  19 int cache_aligned_malloc (void** memptr, size_t size)
  20 {
  21 #ifdef NO_POSIX_MEMALIGN
  22         if (((*memptr) = malloc (size)) == 0) {
  23                 fatal << string_compose (_("Memory allocation error: malloc (%1 * %2) failed (%3)"),
  24                                          CPU_CACHE_ALIGN, size, strerror (errno)) << endmsg;
  25                 return errno;
  26         } else {
  27                 return 0;
  28         }
  29 #else
  30         if (posix_memalign (memptr, CPU_CACHE_ALIGN, size)) {
  31                 fatal << string_compose (_("Memory allocation error: posix_memalign (%1 * %2) failed (%3)"),
  32                                          CPU_CACHE_ALIGN, size, strerror (errno)) << endmsg;
  33         }
  34
  35         return 0;
  36 #endif
  37 }