go_libinit.go RawHistoryFolder

1// SPDX-License-Identifier: Apache-2.0
2// SPDX-FileCopyrightText: 2022 The Ebitengine Authors
3
4//go:build darwin || linux
5
6package fakecgo
7
8import (
9	"syscall"
10	"unsafe"
11)
12
13//go:nosplit
14func x_cgo_notify_runtime_init_done() {
15	// we don't support being called as a library
16}
17
18// _cgo_try_pthread_create retries pthread_create if it fails with
19// EAGAIN.
20//
21//go:nosplit
22//go:norace
23func _cgo_try_pthread_create(thread *pthread_t, attr *pthread_attr_t, pfn unsafe.Pointer, arg *ThreadStart) int {
24	var ts syscall.Timespec
25	// tries needs to be the same type as syscall.Timespec.Nsec
26	// but the fields are int32 on 32bit and int64 on 64bit.
27	// tries is assigned to syscall.Timespec.Nsec in order to match its type.
28	var tries = ts.Nsec
29	var err int
30
31	for tries = 0; tries < 20; tries++ {
32		err = int(pthread_create(thread, attr, pfn, unsafe.Pointer(arg)))
33		if err == 0 {
34			pthread_detach(*thread)
35			return 0
36		}
37		if err != int(syscall.EAGAIN) {
38			return err
39		}
40		ts.Sec = 0
41		ts.Nsec = (tries + 1) * 1000 * 1000 // Milliseconds.
42		nanosleep(&ts, nil)
43	}
44	return int(syscall.EAGAIN)
45}