Initial QSfera import

Server/vendor/github.com/ceph/go-ceph/internal/cutil/aliases.go

@@ -0,0 +1,66 @@
+package cutil
+
+/*
+#include <stdlib.h>
+#include <string.h>
+typedef void* voidptr;
+*/
+import "C"
+
+import (
+	"math"
+	"unsafe"
+)
+
+const (
+	// MaxIdx is the maximum index on 32 bit systems
+	MaxIdx = math.MaxInt32 // 2GB, max int32 value, should be safe
+
+	// PtrSize is the size of a pointer
+	PtrSize = C.sizeof_voidptr
+
+	// SizeTSize is the size of C.size_t
+	SizeTSize = C.sizeof_size_t
+)
+
+// Compile-time assertion ensuring that Go's `int` is at least as large as C's.
+const _ = unsafe.Sizeof(int(0)) - C.sizeof_int
+
+// SizeT wraps size_t from C.
+type SizeT C.size_t
+
+// This section contains a bunch of types that are basically just
+// unsafe.Pointer but have specific types to help "self document" what the
+// underlying pointer is really meant to represent.
+
+// CPtr is an unsafe.Pointer to C allocated memory
+type CPtr unsafe.Pointer
+
+// CharPtrPtr is an unsafe pointer wrapping C's `char**`.
+type CharPtrPtr unsafe.Pointer
+
+// CharPtr is an unsafe pointer wrapping C's `char*`.
+type CharPtr unsafe.Pointer
+
+// SizeTPtr is an unsafe pointer wrapping C's `size_t*`.
+type SizeTPtr unsafe.Pointer
+
+// FreeFunc is a wrapper around calls to, or act like, C's free function.
+type FreeFunc func(unsafe.Pointer)
+
+// Malloc is C.malloc
+func Malloc(s SizeT) CPtr { return CPtr(C.malloc(C.size_t(s))) }
+
+// Free is C.free
+func Free(p CPtr) { C.free(unsafe.Pointer(p)) }
+
+// CString is C.CString
+func CString(s string) CharPtr { return CharPtr((C.CString(s))) }
+
+// CBytes is C.CBytes
+func CBytes(b []byte) CPtr { return CPtr(C.CBytes(b)) }
+
+// Memcpy is C.memcpy
+func Memcpy(dst, src CPtr, n SizeT) {
+	C.memcpy(unsafe.Pointer(dst), unsafe.Pointer(src), C.size_t(n))
+}