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
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
|
/* -------------------------------------------
Copyright ZKA Technologies.
------------------------------------------- */
#ifndef _INC_PROCESS_SCHEDULER_HXX_
#define _INC_PROCESS_SCHEDULER_HXX_
#include <ArchKit/ArchKit.hxx>
#include <KernelKit/LockDelegate.hxx>
#include <KernelKit/User.hxx>
#include <KernelKit/ProcessHeap.hxx>
#include <NewKit/MutableArray.hxx>
#define kSchedMinMicroTime (AffinityKind::kStandard)
#define kSchedInvalidPID (-1)
#define kSchedProcessLimitPerTeam (16U)
////////////////////////////////////////////////////
// LAST REV: Mon Feb 12 13:52:01 CET 2024
////////////////////////////////////////////////////
namespace Kernel
{
//! @brief Forward declarations.
struct PROCESS_HEADER_BLOCK;
class PEFSharedObjectInterface;
class ProcessTeam;
class ProcessScheduler;
class ProcessHelper;
//! @brief Process identifier.
typedef Int64 ProcessID;
//! @brief Process name length.
inline constexpr SizeT kProcessLen = 256U;
//! @brief Process status enum.
enum class ProcessStatus : Int32
{
kStarting,
kRunning,
kKilled,
kFrozen,
kDead
};
//! @brief Affinity is the amount of nano-seconds this process is going
//! to run.
enum class AffinityKind : Int32
{
kInvalid = 300,
kVeryHigh = 250,
kHigh = 200,
kStandard = 150,
kLowUsage = 100,
kVeryLowUsage = 50,
};
// operator overloading.
inline bool operator<(AffinityKind lhs, AffinityKind rhs)
{
Int32 lhs_int = static_cast<Int>(lhs);
Int32 rhs_int = static_cast<Int>(rhs);
return lhs_int < rhs_int;
}
inline bool operator>(AffinityKind lhs, AffinityKind rhs)
{
Int32 lhs_int = static_cast<Int>(lhs);
Int32 rhs_int = static_cast<Int>(rhs);
return lhs_int > rhs_int;
}
inline bool operator<=(AffinityKind lhs, AffinityKind rhs)
{
Int32 lhs_int = static_cast<Int>(lhs);
Int32 rhs_int = static_cast<Int>(rhs);
return lhs_int <= rhs_int;
}
inline bool operator>=(AffinityKind lhs, AffinityKind rhs)
{
Int32 lhs_int = static_cast<Int>(lhs);
Int32 rhs_int = static_cast<Int>(rhs);
return lhs_int >= rhs_int;
}
// end of operator overloading.
enum ProcessSubsystemEnum
{
eProcessSubsystemSecurity,
eProcessSubsystemNative,
eProcessSubsystemInvalid,
eProcessSubsystemCount,
};
using ProcessSubsystem = ProcessSubsystemEnum;
using ProcessTime = UInt64;
using PID = Int64;
// for permission manager, tells where we run the code.
enum class ProcessLevelRing : Int32
{
kRingStdUser = 1,
kRingSuperUser = 2,
kRingGuestUser = 5,
kRingCount = 5,
};
// Helper types.
using ImagePtr = VoidPtr;
using HeapPtrKind = VoidPtr;
/// @name PROCESS_HEADER_BLOCK
/// @brief Process Header Block (PHB).
/// Holds information about the running process/thread.
struct PROCESS_HEADER_BLOCK final
{
public:
explicit PROCESS_HEADER_BLOCK(VoidPtr startImage = nullptr)
: Image(startImage)
{
}
~PROCESS_HEADER_BLOCK() = default;
ZKA_COPY_DEFAULT(PROCESS_HEADER_BLOCK)
public:
void SetEntrypoint(UIntPtr& imageStart) noexcept;
const Int32& GetExitCode() noexcept;
public:
Char Name[kProcessLen] = {"PROCESS #0 (TEAM 0)"};
ProcessSubsystem SubSystem{ProcessSubsystem::eProcessSubsystemInvalid};
User* AssignedOwner{nullptr};
HAL::StackFramePtr StackFrame{nullptr};
AffinityKind Affinity{AffinityKind::kStandard};
ProcessStatus Status{ProcessStatus::kDead};
// Memory, images pointers.
HeapPtrKind HeapCursor{nullptr};
ImagePtr Image{nullptr};
HeapPtrKind HeapPtr{nullptr};
// shared library handle, reserved for kSharedObjectKind types of executables only.
PEFSharedObjectInterface* DLLPtr{nullptr};
PROCESS_HEADER_BLOCK* Parent{nullptr};
// Memory usage.
SizeT UsedMemory{0};
SizeT FreeMemory{0};
SizeT SizeMemory{gib_cast(4)};
enum
{
kAppKind = 1,
kSharedObjectKind = 2,
kKindCount,
};
ProcessTime PTime{0};
PID ProcessId{kSchedInvalidPID};
Int32 Kind{kAppKind};
public:
//! @brief boolean operator, check status.
operator bool()
{
return Status != ProcessStatus::kDead;
}
///! @brief Crashes the app, exits with code ~0.
Void Crash();
///! @brief Exits the app.
Void Exit(const Int32& exit_code = 0);
///! @brief TLS allocate.
///! @param sz size of new ptr.
VoidPtr New(const SizeT& sz);
///! @brief TLS free.
///! @param ptr the pointer to free.
///! @param sz the size of it.
Boolean Delete(VoidPtr ptr, const SizeT& sz);
///! @brief Wakes up threads.
Void Wake(const bool wakeup = false);
// PROCESS_HEADER_BLOCK getters.
public:
///! @brief Get the process's name
///! @example 'C Runtime Library'
const Char* GetProcessName() noexcept;
//! @brief return local error code of process.
//! @return Int32 local error code.
Int32& GetLocalCode() noexcept;
const User* GetOwner() noexcept;
const ProcessStatus& GetStatus() noexcept;
const AffinityKind& GetAffinity() noexcept;
private:
Int32 fLastExitCode{0};
Int32 fLocalCode{0};
friend ProcessScheduler;
friend ProcessHelper;
};
/// \brief Processs Team (contains multiple processes inside it.)
/// Equivalent to a process batch
class ProcessTeam final
{
public:
explicit ProcessTeam() = default;
~ProcessTeam() = default;
ZKA_COPY_DEFAULT(ProcessTeam);
MutableArray<Ref<PROCESS_HEADER_BLOCK>>& AsArray();
Ref<PROCESS_HEADER_BLOCK>& AsRef();
UInt64& Id() noexcept;
public:
MutableArray<Ref<PROCESS_HEADER_BLOCK>> mProcessList;
Ref<PROCESS_HEADER_BLOCK> mCurrentProcess;
UInt64 mTeamId{0};
};
using ProcessHeaderRef = PROCESS_HEADER_BLOCK*;
/// @brief PROCESS_HEADER_BLOCK manager class.
/// The main class which you call to schedule an app.
class ProcessScheduler final
{
explicit ProcessScheduler() = default;
public:
~ProcessScheduler() = default;
ZKA_COPY_DEFAULT(ProcessScheduler)
operator bool();
bool operator!();
public:
ProcessTeam& CurrentTeam();
public:
SizeT Add(Ref<PROCESS_HEADER_BLOCK>& processRef);
Bool Remove(SizeT processSlot);
public:
Ref<PROCESS_HEADER_BLOCK>& TheCurrent();
SizeT Run() noexcept;
public:
STATIC Ref<ProcessScheduler>& The();
private:
ProcessTeam mTeam;
};
/*
* Just a helper class, which contains some utilities for the scheduler.
*/
class ProcessHelper final
{
public:
STATIC bool Switch(HAL::StackFrame* newStack, const PID& newPid);
STATIC bool CanBeScheduled(Ref<PROCESS_HEADER_BLOCK>& process);
STATIC PID& TheCurrentPID();
STATIC SizeT StartScheduling();
};
const Int32& sched_get_exit_code(void) noexcept;
} // namespace Kernel
#include <KernelKit/ThreadLocalStorage.hxx>
////////////////////////////////////////////////////
// END
////////////////////////////////////////////////////
#endif /* ifndef _INC_PROCESS_SCHEDULER_HXX_ */
|
