summaryrefslogtreecommitdiffstats
path: root/lib/isc/unix/meminfo.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/isc/unix/meminfo.c')
-rw-r--r--lib/isc/unix/meminfo.c50
1 files changed, 50 insertions, 0 deletions
diff --git a/lib/isc/unix/meminfo.c b/lib/isc/unix/meminfo.c
new file mode 100644
index 0000000..612ccea
--- /dev/null
+++ b/lib/isc/unix/meminfo.c
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * SPDX-License-Identifier: MPL-2.0
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, you can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+#include <inttypes.h>
+#include <unistd.h>
+
+#include <isc/meminfo.h>
+#if defined(HAVE_SYS_SYSCTL_H) && !defined(__linux__)
+#include <sys/sysctl.h>
+#endif /* if defined(HAVE_SYS_SYSCTL_H) && !defined(__linux__) */
+
+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 /* if defined(HW_MEMSIZE) */
+ uint64_t size = 0;
+ size_t len = sizeof(size);
+ if (sysctl(mib, 2, &size, &len, NULL, 0) == 0) {
+ return (size);
+ }
+#endif /* if defined(CTL_HW) && (defined(HW_PHYSMEM64) || defined(HW_MEMSIZE)) \
+ * */
+#if defined(_SC_PHYS_PAGES) && defined(_SC_PAGESIZE)
+ long pages = sysconf(_SC_PHYS_PAGES);
+ long pagesize = sysconf(_SC_PAGESIZE);
+
+ if (pages == -1 || pagesize == -1) {
+ return (0);
+ }
+
+ return ((size_t)pages * pagesize);
+#endif /* if defined(_SC_PHYS_PAGES) && defined(_SC_PAGESIZE) */
+ return (0);
+}