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// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package runtime
import "unsafe"
//#define MAXALIGN 8
type waitq struct {
first *sudog
last *sudog
}
type hchan struct {
qcount uint // total data in the q
dataqsiz uint // size of the circular q
buf *byte
elemsize uint16
closed uint32
elemtype *_type // element type
sendx uint // send index
recvx uint // receive index
recvq waitq // list of recv waiters
sendq waitq // list of send waiters
lock mutex
}
// Buffer follows Hchan immediately in memory.
// chanbuf(c, i) is pointer to the i'th slot in the buffer.
// #define chanbuf(c, i) ((byte*)((c)->buf)+(uintptr)(c)->elemsize*(i))
const (
// scase.kind
_CaseRecv = iota
_CaseSend
_CaseDefault
)
// Known to compiler.
// Changes here must also be made in src/cmd/gc/select.c's selecttype.
type scase struct {
elem unsafe.Pointer // data element
_chan *hchan // chan
pc uintptr // return pc
kind uint16
so uint16 // vararg of selected bool
receivedp *bool // pointer to received bool (recv2)
releasetime int64
}
// Known to compiler.
// Changes here must also be made in src/cmd/gc/select.c's selecttype.
type _select struct {
tcase uint16 // total count of scase[]
ncase uint16 // currently filled scase[]
pollorder *uint16 // case poll order
lockorder **hchan // channel lock order
scase [1]scase // one per case (in order of appearance)
}
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