1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
// SPDX-License-Identifier: Apache-2.0
// SPDX-FileCopyrightText: 2022 The Ebitengine Authors
//go:build !cgo && (darwin || freebsd || linux)
package fakecgo
import (
"syscall"
"unsafe"
)
var (
pthread_g pthread_key_t
runtime_init_cond = PTHREAD_COND_INITIALIZER
runtime_init_mu = PTHREAD_MUTEX_INITIALIZER
runtime_init_done int
)
//go:nosplit
//go:norace
func x_cgo_notify_runtime_init_done() {
pthread_mutex_lock(&runtime_init_mu)
runtime_init_done = 1
pthread_cond_broadcast(&runtime_init_cond)
pthread_mutex_unlock(&runtime_init_mu)
}
// Store the g into a thread-specific value associated with the pthread key pthread_g.
// And pthread_key_destructor will dropm when the thread is exiting.
//
//go:norace
func x_cgo_bindm(g unsafe.Pointer) {
// We assume this will always succeed, otherwise, there might be extra M leaking,
// when a C thread exits after a cgo call.
// We only invoke this function once per thread in runtime.needAndBindM,
// and the next calls just reuse the bound m.
pthread_setspecific(pthread_g, g)
}
// _cgo_try_pthread_create retries pthread_create if it fails with
// EAGAIN.
//
//go:nosplit
//go:norace
func _cgo_try_pthread_create(thread *pthread_t, attr *pthread_attr_t, pfn unsafe.Pointer, arg *ThreadStart) int {
var ts syscall.Timespec
// tries needs to be the same type as syscall.Timespec.Nsec
// but the fields are int32 on 32bit and int64 on 64bit.
// tries is assigned to syscall.Timespec.Nsec in order to match its type.
tries := ts.Nsec
var err int
for tries = 0; tries < 20; tries++ {
// inlined this call because it ran out of stack when inlining was disabled
err = int(call5(pthread_createABI0, uintptr(unsafe.Pointer(thread)), uintptr(unsafe.Pointer(attr)), uintptr(pfn), uintptr(unsafe.Pointer(arg)), 0))
if err == 0 {
// inlined this call because it ran out of stack when inlining was disabled
call5(pthread_detachABI0, uintptr(*thread), 0, 0, 0, 0)
return 0
}
if err != int(syscall.EAGAIN) {
return err
}
ts.Sec = 0
ts.Nsec = (tries + 1) * 1000 * 1000 // Milliseconds.
// inlined this call because it ran out of stack when inlining was disabled
call5(nanosleepABI0, uintptr(unsafe.Pointer(&ts)), 0, 0, 0, 0)
}
return int(syscall.EAGAIN)
}
|
