/* Allocate aligned memory (heap) starting on page boundary */
static unsigned char *
my_memalign(int length, unsigned char ** wrkBuffp, const struct opts_t * op)
{
size_t psz;
unsigned char * res;
#if defined(HAVE_SYSCONF) && defined(_SC_PAGESIZE)
psz = sysconf(_SC_PAGESIZE); /* POSIX.1 (was getpagesize()) */
#elif defined(SG_LIB_WIN32)
psz = win_pagesize();
#else
psz = 4096; /* give up, pick likely figure */
#endif
#ifdef HAVE_POSIX_MEMALIGN
{
int err;
void * wp = NULL;
err = posix_memalign(&wp, psz, length);
if (err || (NULL == wp)) {
pr2serr("posix_memalign: error [%d], out of memory?\n", err);
return NULL;
}
memset(wp, 0, length);
if (wrkBuffp)
*wrkBuffp = (unsigned char *)wp;
res = (unsigned char *)wp;
if (op->verbose > 3)
pr2serr("%s: posix, len=%d, wrkBuffp=%p, psz=%d, rp=%p\n",
__func__, length, (void *)*wrkBuffp, (int)psz,
(void *)res);
return res;
}
#else
{
unsigned char * wrkBuff;
wrkBuff = (unsigned char*)calloc(length + psz, 1);
if (NULL == wrkBuff) {
if (wrkBuffp)
*wrkBuffp = NULL;
return NULL;
} else if (wrkBuffp)
*wrkBuffp = wrkBuff;
res = (unsigned char *)(((uintptr_t)wrkBuff + psz - 1) &
(~(psz - 1)));
if (op->verbose > 3)
pr2serr("%s: hack, len=%d, wrkBuffp=%p, psz=%d, rp=%p\n",
__func__, length, (void *)*wrkBuffp, (int)psz,
(void *)res);
return res;
}
#endif
}
/* Allocate aligned memory (heap) starting on page boundary */
static unsigned char *
my_memalign(int length, unsigned char ** wrkBuffp)
{
size_t psz;
#if defined(HAVE_SYSCONF) && defined(_SC_PAGESIZE)
psz = sysconf(_SC_PAGESIZE); /* POSIX.1 (was getpagesize()) */
#elif defined(SG_LIB_WIN32)
psz = win_pagesize();
#else
psz = 4096; /* give up, pick likely figure */
#endif
#ifdef HAVE_POSIX_MEMALIGN
{
int err;
void * wp = NULL;
err = posix_memalign(&wp, psz, length);
if (err || (NULL == wp)) {
fprintf(stderr, "posix_memalign: error [%d], out of memory?\n",
err);
return NULL;
}
memset(wp, 0, length);
if (wrkBuffp)
*wrkBuffp = (unsigned char *)wp;
return (unsigned char *)wp;
}
#else
{
unsigned char * wrkBuff;
wrkBuff = (unsigned char*)calloc(length + psz, 1);
if (NULL == wrkBuff) {
if (wrkBuffp)
*wrkBuffp = NULL;
return NULL;
} else if (wrkBuffp)
*wrkBuffp = wrkBuff;
return (unsigned char *)(((uintptr_t)wrkBuff + psz - 1) &
(~(psz - 1)));
}
#endif
}
