57 lines
1.3 KiB
Go
57 lines
1.3 KiB
Go
/*
|
|
* Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
package sync
|
|
|
|
// llgo:skipall
|
|
import (
|
|
"unsafe"
|
|
|
|
"github.com/goplus/llgo/c"
|
|
"github.com/goplus/llgo/c/pthread"
|
|
"github.com/goplus/llgo/c/pthread/sync"
|
|
)
|
|
|
|
const (
|
|
LLGoPackage = "link"
|
|
)
|
|
|
|
// -----------------------------------------------------------------------------
|
|
|
|
var onceParam pthread.Key
|
|
|
|
func init() {
|
|
onceParam.Create(nil)
|
|
}
|
|
|
|
type Once sync.Once
|
|
|
|
func (o *Once) Do(f func()) {
|
|
ptr := c.Malloc(unsafe.Sizeof(f))
|
|
*(*func())(ptr) = f
|
|
onceParam.Set(ptr)
|
|
if *(*c.Long)(unsafe.Pointer(o)) == 0 { // try init
|
|
*(*sync.Once)(o) = sync.OnceInit
|
|
}
|
|
(*sync.Once)(o).Do(func() {
|
|
ptr := onceParam.Get()
|
|
(*(*func())(ptr))()
|
|
c.Free(ptr)
|
|
})
|
|
}
|
|
|
|
// -----------------------------------------------------------------------------
|