1/* Copyright (c) 2013-2015 Jeffrey Pfau
 2 *
 3 * This Source Code Form is subject to the terms of the Mozilla Public
 4 * License, v. 2.0. If a copy of the MPL was not distributed with this
 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 6#ifndef SIO_LOCKSTEP_H
 7#define SIO_LOCKSTEP_H
 8
 9#include "gba/sio.h"
10
11enum GBASIOLockstepPhase {
12	TRANSFER_IDLE = 0,
13	TRANSFER_STARTING,
14	TRANSFER_STARTED,
15	TRANSFER_FINISHING,
16	TRANSFER_FINISHED
17};
18
19struct GBASIOLockstep {
20	struct GBASIOLockstepNode* players[MAX_GBAS];
21	int attached;
22	int attachedMulti;
23	int attachedNormal;
24
25	uint16_t multiRecv[MAX_GBAS];
26	uint32_t normalRecv[MAX_GBAS];
27	enum GBASIOLockstepPhase transferActive;
28	int32_t transferCycles;
29
30	uint32_t masterWaiting;
31
32	void (*signal)(struct GBASIOLockstep*, int id);
33	void (*wait)(struct GBASIOLockstep*, int id);
34	void* context;
35#ifndef NDEBUG
36	int transferId;
37#endif
38};
39
40struct GBASIOLockstepNode {
41	struct GBASIODriver d;
42	struct GBASIOLockstep* p;
43
44	volatile int32_t nextEvent;
45	int32_t eventDiff;
46	bool normalSO;
47	int id;
48	enum GBASIOMode mode;
49	bool transferFinished;
50#ifndef NDEBUG
51	int transferId;
52	enum GBASIOLockstepPhase phase;
53#endif
54};
55
56void GBASIOLockstepInit(struct GBASIOLockstep*);
57void GBASIOLockstepDeinit(struct GBASIOLockstep*);
58
59void GBASIOLockstepNodeCreate(struct GBASIOLockstepNode*);
60
61bool GBASIOLockstepAttachNode(struct GBASIOLockstep*, struct GBASIOLockstepNode*);
62void GBASIOLockstepDetachNode(struct GBASIOLockstep*, struct GBASIOLockstepNode*);
63
64#endif