blob: 391e833c01fe29cc65c7342766972b8b03aa769d (
plain) (
blame)
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
|
// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include "common/common.h"
#include "core/core.h"
#include "core/hle/kernel/kernel.h"
#include "core/hle/kernel/thread.h"
#include "core/hle/kernel/timer.h"
namespace Kernel {
Handle g_main_thread = 0;
HandleTable g_handle_table;
u64 g_program_id = 0;
HandleTable::HandleTable() {
next_generation = 1;
Clear();
}
ResultVal<Handle> HandleTable::Create(Object* obj) {
_dbg_assert_(Kernel, obj != nullptr);
u16 slot = next_free_slot;
if (slot >= generations.size()) {
LOG_ERROR(Kernel, "Unable to allocate Handle, too many slots in use.");
return ERR_OUT_OF_HANDLES;
}
next_free_slot = generations[slot];
u16 generation = next_generation++;
// Overflow count so it fits in the 15 bits dedicated to the generation in the handle.
// CTR-OS doesn't use generation 0, so skip straight to 1.
if (next_generation >= (1 << 15)) next_generation = 1;
generations[slot] = generation;
intrusive_ptr_add_ref(obj);
objects[slot] = obj;
Handle handle = generation | (slot << 15);
obj->handle = handle;
return MakeResult<Handle>(handle);
}
ResultVal<Handle> HandleTable::Duplicate(Handle handle) {
Object* object = GetGeneric(handle);
if (object == nullptr) {
LOG_ERROR(Kernel, "Tried to duplicate invalid handle: %08X", handle);
return ERR_INVALID_HANDLE;
}
return Create(object);
}
ResultCode HandleTable::Close(Handle handle) {
if (!IsValid(handle))
return ERR_INVALID_HANDLE;
size_t slot = GetSlot(handle);
u16 generation = GetGeneration(handle);
intrusive_ptr_release(objects[slot]);
objects[slot] = nullptr;
generations[generation] = next_free_slot;
next_free_slot = slot;
return RESULT_SUCCESS;
}
bool HandleTable::IsValid(Handle handle) const {
size_t slot = GetSlot(handle);
u16 generation = GetGeneration(handle);
return slot < MAX_COUNT && objects[slot] != nullptr && generations[slot] == generation;
}
Object* HandleTable::GetGeneric(Handle handle) const {
if (handle == CurrentThread) {
// TODO(yuriks) Directly return the pointer once this is possible.
handle = GetCurrentThreadHandle();
} else if (handle == CurrentProcess) {
LOG_ERROR(Kernel, "Current process (%08X) pseudo-handle not supported", CurrentProcess);
return nullptr;
}
if (!IsValid(handle)) {
return nullptr;
}
return objects[GetSlot(handle)];
}
void HandleTable::Clear() {
for (size_t i = 0; i < MAX_COUNT; ++i) {
generations[i] = i + 1;
if (objects[i] != nullptr)
intrusive_ptr_release(objects[i]);
objects[i] = nullptr;
}
next_free_slot = 0;
}
/// Initialize the kernel
void Init() {
Kernel::ThreadingInit();
Kernel::TimersInit();
}
/// Shutdown the kernel
void Shutdown() {
Kernel::ThreadingShutdown();
Kernel::TimersShutdown();
g_handle_table.Clear(); // Free all kernel objects
}
/**
* Loads executable stored at specified address
* @entry_point Entry point in memory of loaded executable
* @return True on success, otherwise false
*/
bool LoadExec(u32 entry_point) {
Core::g_app_core->SetPC(entry_point);
// 0x30 is the typical main thread priority I've seen used so far
g_main_thread = Kernel::SetupMainThread(0x30);
// Setup the idle thread
Kernel::SetupIdleThread();
return true;
}
} // namespace
|
