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new file to encapsulate posix_memalign() hackery

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git-svn-id: svn://localhost/ardour2/branches/3.0@4998 d708f5d6-7413-0410-9779-e7cbd77b26cf
This commit is contained in:
Paul Davis 2009-04-23 17:43:39 +00:00
parent 7c4bfd9b24
commit 0a22716b74
2 changed files with 43 additions and 0 deletions
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35
libs/pbd/malign.cc Normal file
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#include <cstring>
#include <cerrno>
#include "pbd/malign.h"
#include "pbd/error.h"
#include "i18n.h"
using namespace PBD;
#ifdef __x86_64__
static const int CPU_CACHE_ALIGN = 64;
#else
static const int CPU_CACHE_ALIGN = 16; /* arguably 32 on most arches, but it matters less */
#endif
int cache_aligned_malloc (void** memptr, size_t size)
{
#ifdef NO_POSIX_MEMALIGN
if (((*memptr) = malloc (size)) == 0) {
fatal << string_compose (_("Memory allocation error: malloc (%1 * %2) failed (%3)"),
CPU_CACHE_ALIGN, size, strerror (errno)) << endmsg;
return errno;
} else {
return 0;
}
#else
if (posix_memalign (memptr, CPU_CACHE_ALIGN, size)) {
fatal << string_compose (_("Memory allocation error: posix_memalign (%1 * %2) failed (%3)"),
CPU_CACHE_ALIGN, size, strerror (errno)) << endmsg;
}
return 0;
#endif
}

8
libs/pbd/pbd/malign.h Normal file
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#ifndef __pbd_malign_h__
#define __pbd_malign_h__
#include <stdlib.h>
int cache_aligned_malloc (void** memptr, size_t size);
#endif /* __pbd_malign_h__ */