1// SPDX-License-Identifier: Apache-2.0
2// SPDX-FileCopyrightText: 2022 The Ebitengine Authors
3
4package purego
5
6import (
7 "syscall"
8 _ "unsafe" // only for go:linkname
9
10 "golang.org/x/sys/windows"
11)
12
13var syscall15XABI0 uintptr
14
15type syscall15Args struct {
16 fn, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15 uintptr
17 f1, f2, f3, f4, f5, f6, f7, f8 uintptr
18 r1, r2, err uintptr
19 arm64_r8 uintptr
20}
21
22func syscall_syscall15X(fn, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15 uintptr) (r1, r2, err uintptr) {
23 r1, r2, errno := syscall.Syscall15(fn, 15, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15)
24 return r1, r2, uintptr(errno)
25}
26
27// NewCallback converts a Go function to a function pointer conforming to the stdcall calling convention.
28// This is useful when interoperating with Windows code requiring callbacks. The argument is expected to be a
29// function with one uintptr-sized result. The function must not have arguments with size larger than the
30// size of uintptr. Only a limited number of callbacks may be created in a single Go process, and any memory
31// allocated for these callbacks is never released. Between NewCallback and NewCallbackCDecl, at least 1024
32// callbacks can always be created. Although this function is similiar to the darwin version it may act
33// differently.
34func NewCallback(fn interface{}) uintptr {
35 return syscall.NewCallback(fn)
36}
37
38//go:linkname openLibrary openLibrary
39func openLibrary(name string) (uintptr, error) {
40 handle, err := windows.LoadLibrary(name)
41 return uintptr(handle), err
42}
43
44func loadSymbol(handle uintptr, name string) (uintptr, error) {
45 return windows.GetProcAddress(windows.Handle(handle), name)
46}