1 files changed, 16 insertions, 0 deletions
diff --git a/libc-bottom-half/headers/public/__macro_PAGESIZE.h b/libc-bottom-half/headers/public/__macro_PAGESIZE.h
new file mode 100644
index 0000000..d892220
--- /dev/null
+++ b/libc-bottom-half/headers/public/__macro_PAGESIZE.h
@@ -0,0 +1,16 @@
+#ifndef __wasilibc___macro_PAGESIZE_h
+#define __wasilibc___macro_PAGESIZE_h
+
+/*
+ * The page size in WebAssembly is fixed at 64 KiB. If this ever changes,
+ * it's expected that applications will need to opt in, so we can change
+ * this.
+ *
+ * If this ever needs to be a value outside the range of an `int`, the
+ * `getpagesize` function which returns this value will need special
+ * consideration. POSIX has deprecated `getpagesize` in favor of
+ * `sysconf(_SC_PAGESIZE)` which does not have this problem.
+ */
+#define PAGESIZE (0x10000)
+
+#endif