blob: c34ff1533ded6c7c02abb328a780f9fdcfb6ed38 (
plain)
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
|
// 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.
#define MAXALIGN 8
typedef struct WaitQ WaitQ;
typedef struct Select Select;
typedef struct Scase Scase;
struct WaitQ
{
SudoG* first;
SudoG* last;
};
struct Hchan
{
uintgo qcount; // total data in the q
uintgo dataqsiz; // size of the circular q
byte* buf;
uint16 elemsize;
uint32 closed;
Type* elemtype; // element type
uintgo sendx; // send index
uintgo recvx; // receive index
WaitQ recvq; // list of recv waiters
WaitQ sendq; // list of send waiters
Mutex lock;
};
// 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))
enum
{
debug = 0,
// Scase.kind
CaseRecv,
CaseSend,
CaseDefault,
};
// Known to compiler.
// Changes here must also be made in src/cmd/gc/select.c's selecttype.
struct Scase
{
void* elem; // data element
Hchan* chan; // chan
uintptr pc; // return pc
uint16 kind;
uint16 so; // vararg of selected bool
bool* receivedp; // pointer to received bool (recv2)
int64 releasetime;
};
// Known to compiler.
// Changes here must also be made in src/cmd/gc/select.c's selecttype.
struct Select
{
uint16 tcase; // total count of scase[]
uint16 ncase; // currently filled scase[]
uint16* pollorder; // case poll order
Hchan** lockorder; // channel lock order
Scase scase[1]; // one per case (in order of appearance)
};
|
