add: added projectsHEADmain

1 files changed, 10 insertions, 0 deletions

diff --git a/malloc/page_begin/page_begin.c b/malloc/page_begin/page_begin.c
new file mode 100644
index 0000000..ebb1842
--- /dev/null
+++ b/malloc/page_begin/page_begin.c
@@ -0,0 +1,10 @@
+#include "page_begin.h"
+
+void *page_begin(void *ptr, size_t page_size)
+{
+    char *a = ptr;
+    char *p = NULL;
+    size_t test = a - p;
+    void *res = (void *)(test & ~(page_size - 1));
+    return res;
+}