#136: Start working on database persistence

vendor/modernc.org/libc/libc64.go

@@ -0,0 +1,23 @@
+// Copyright 2020 The Libc Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build amd64 arm64 s390x
+
+package libc // import "modernc.org/libc"
+
+type (
+	// RawMem represents the biggest byte array the runtime can handle
+	RawMem [1<<50 - 1]byte
+
+	// 48-5*8 = 8 bytes left to pad
+	stackHeaderPadding struct {
+		a uintptr
+	}
+)
+
+type bits []int
+
+func newBits(n int) (r bits)  { return make(bits, (n+63)>>6) }
+func (b bits) has(n int) bool { return b != nil && b[n>>6]&(1<<uint(n&63)) != 0 }
+func (b bits) set(n int)      { b[n>>6] |= 1 << uint(n&63) }