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
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
|
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
* Data structures used by the process scheduler
*/
#ifndef TINSEL_SCHED_H // prevent multiple includes
#define TINSEL_SCHED_H
#include "tinsel/dw.h" // new data types
#include "tinsel/coroutine.h"
#include "tinsel/events.h"
#include "tinsel/tinsel.h"
namespace Tinsel {
// the size of process specific info
#define PARAM_SIZE 32
// the maximum number of processes
#define NUM_PROCESS (TinselV2 ? 70 : 64)
#define MAX_PROCESSES 70
typedef void (*CORO_ADDR)(CoroContext &, const void *);
/** process structure */
struct PROCESS {
PROCESS *pNext; ///< pointer to next process in active or free list
PROCESS *pPrevious; ///< pointer to previous process in active or free list
CoroContext state; ///< the state of the coroutine
CORO_ADDR coroAddr; ///< the entry point of the coroutine
int sleepTime; ///< number of scheduler cycles to sleep
int pid; ///< process ID
char param[PARAM_SIZE]; ///< process specific info
};
typedef PROCESS *PPROCESS;
struct INT_CONTEXT;
/**
* Create and manage "processes" (really coroutines).
*/
class Scheduler {
public:
/** Pointer to a function of the form "void function(PPROCESS)" */
typedef void (*VFPTRPP)(PROCESS *);
private:
/** list of all processes */
PROCESS *processList;
/** active process list - also saves scheduler state */
PROCESS *active;
/** pointer to free process list */
PROCESS *pFreeProcesses;
/** the currently active process */
PROCESS *pCurrent;
#ifdef DEBUG
// diagnostic process counters
int numProcs;
int maxProcs;
void CheckStack();
#endif
/**
* Called from killProcess() to enable other resources
* a process may be allocated to be released.
*/
VFPTRPP pRCfunction;
public:
Scheduler();
~Scheduler();
void reset();
#ifdef DEBUG
void printStats();
#endif
void schedule();
void rescheduleAll();
void reschedule(PPROCESS pReSchedProc = NULL);
void giveWay(PPROCESS pReSchedProc = NULL);
PROCESS *createProcess(int pid, CORO_ADDR coroAddr, const void *pParam, int sizeParam);
void killProcess(PROCESS *pKillProc);
PROCESS *getCurrentProcess();
int getCurrentPID() const;
int killMatchingProcess(int pidKill, int pidMask = -1);
void setResourceCallback(VFPTRPP pFunc);
};
extern Scheduler *g_scheduler; // FIXME: Temporary global var, to be used until everything has been OOifyied
//----------------- FUNCTION PROTOTYPES --------------------
void SceneProcesses(uint32 numProcess, SCNHANDLE hProcess);
void CallSceneProcess(uint32 procID);
void KillSceneProcess(uint32 procID);
void SceneProcessEvent(CORO_PARAM, uint32 procID, TINSEL_EVENT event, bool bWait,
int myEscape, bool *result = NULL);
void RestoreSceneProcess(INT_CONTEXT *pic);
void GlobalProcesses(uint32 numProcess, byte *pProcess);
void xCallGlobalProcess(uint32 procID);
void xKillGlobalProcess(uint32 procID);
bool GlobalProcessEvent(CORO_PARAM, uint32 procID, TINSEL_EVENT event, bool bWait, int myEscape);
void RestoreGlobalProcess(INT_CONTEXT *pic);
void KillGlobalProcesses();
void FreeGlobalProcesses();
} // End of namespace Tinsel
#endif // TINSEL_SCHED_H
|
