meminfo.c revision b39bbe3c950a524f2d683f660fe243307da04d66
/*
* Copyright (C) 2015 Internet Systems Consortium, Inc. ("ISC")
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include <config.h>
#include <isc/meminfo.h>
#include <unistd.h>
#include <sys/sysctl.h>
isc_uint64_t
isc_meminfo_totalphys(void) {
#if defined(CTL_HW) && (defined(HW_PHYSMEM64) || defined(HW_MEMSIZE))
int mib[2];
mib[0] = CTL_HW;
#if defined(HW_MEMSIZE)
mib[1] = HW_MEMSIZE;
#elif defined(HW_PHYSMEM64)
mib[1] = HW_PHYSMEM64;
#endif
isc_uint64_t size = 0;
size_t len = sizeof(size);
if (sysctl(mib, 2, &size, &len, NULL, 0) == 0)
return (size);
#endif
#if defined(_SC_PHYS_PAGES) && defined(_SC_PAGESIZE)
return ((size_t) (sysconf(_SC_PHYS_PAGES) * sysconf(_SC_PAGESIZE)));
#endif
return (0);
}