1 files changed, 21 insertions, 2 deletions
diff --git a/src/utils/mlock.cpp b/src/utils/mlock.cpp
index e4456658d..12947709d 100644
--- a/src/utils/mlock.cpp
+++ b/src/utils/mlock.cpp
@@ -5,20 +5,39 @@
 
 #include <botan/util.h>
 
+#if defined(BOTAN_TARGET_OS_HAS_POSIX_MLOCK)
+  #include <sys/types.h>
+  #include <sys/mman.h>
+#elif defined(BOTAN_TARGET_OS_HAS_WIN32_VIRTUAL_LOCK)
+  #include <windows.h>
+#endif
+
 namespace Botan {
 
 /*************************************************
 * Lock an area of memory into RAM                *
 *************************************************/
-void lock_mem(void*, u32bit)
+bool lock_mem(void* ptr, u32bit bytes)
    {
+#if defined(BOTAN_TARGET_OS_HAS_POSIX_MLOCK)
+   return (mlock(ptr, bytes) == 0);
+#elif defined(BOTAN_TARGET_OS_HAS_WIN32_VIRTUAL_LOCK)
+   return (VirtualLock(ptr, bytes) != 0);
+#else
+   return false;
+#endif
    }
 
 /*************************************************
 * Unlock a previously locked region of memory    *
 *************************************************/
-void unlock_mem(void*, u32bit)
+void unlock_mem(void* ptr, u32bit bytes)
    {
+#if defined(BOTAN_TARGET_OS_HAS_POSIX_MLOCK)
+   munlock(ptr, bytes);
+#elif defined(BOTAN_TARGET_OS_HAS_WIN32_VIRTUAL_LOCK)
+   VirtualUnlock(ptr, bytes);
+#endif
    }
 
 }