[PATCH 03/12] util: Introduce l_util_pagesize

[Denis Kenzior <denkenz@gmail.com>]

---
 ell/ell.sym |  1 +
 ell/util.c  | 12 ++++++++++++
 ell/util.h  |  2 ++
 3 files changed, 15 insertions(+)

diff --git a/ell/ell.sym b/ell/ell.sym
index 9fcc3aad9a2f..bc0c6e10ebca 100644
--- a/ell/ell.sym
+++ b/ell/ell.sym
@@ -23,6 +23,7 @@ global:
 	l_util_hexdumpv;
 	l_util_debug;
 	l_util_get_debugfs_path;
+	l_util_pagesize;
 	l_memeq;
 	l_secure_memeq;
 	l_safe_atox8;
diff --git a/ell/util.c b/ell/util.c
index 549e253eefc0..45ec6c8110bc 100644
--- a/ell/util.c
+++ b/ell/util.c
@@ -15,6 +15,7 @@
 #include <limits.h>
 #include <stdint.h>
 #include <errno.h>
+#include <unistd.h>
 
 #include "utf8.h"
 #include "util.h"
@@ -812,3 +813,14 @@ LIB_EXPORT int l_safe_atox32(const char *s, uint32_t *out_x)
 
 	return safe_atou(s, 16, out_x);
 }
+
+LIB_EXPORT size_t l_util_pagesize(void)
+{
+	static size_t page_size = 0;
+
+	if (likely(page_size > 0))
+		return page_size;
+
+	page_size = sysconf(_SC_PAGESIZE);
+	return page_size;
+}
diff --git a/ell/util.h b/ell/util.h
index f4fc4d1143e3..c56f182292fa 100644
--- a/ell/util.h
+++ b/ell/util.h
@@ -515,6 +515,8 @@ int l_safe_atox32(const char *s, uint32_t *out_u);
 int l_safe_atox16(const char *s, uint16_t *out_u);
 int l_safe_atox8(const char *s, uint8_t *out_u);
 
+size_t l_util_pagesize(void);
+
 #ifdef __cplusplus
 }
 #endif
-- 
2.45.2