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
|
/* Copyright (c) 2003, 2006, 2007 MySQL AB
Use is subject to license terms
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; version 2 of the License.
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 */
#include "RWPool.hpp"
#include <ndbd_exit_codes.h>
#include <NdbOut.hpp>
#define REC_NIL GLOBAL_PAGE_SIZE_WORDS
RWPool::RWPool()
{
bzero(this, sizeof(* this));
m_current_pos = RWPage::RWPAGE_WORDS;
m_current_first_free = REC_NIL;
m_first_free_page = RNIL;
}
void
RWPool::init(const Record_info& ri, const Pool_context& pc)
{
m_ctx = pc;
m_record_info = ri;
m_record_info.m_size = ((ri.m_size + 3) >> 2); // Align to word boundary
m_record_info.m_offset_magic = ((ri.m_offset_magic + 3) >> 2);
m_record_info.m_offset_next_pool = ((ri.m_offset_next_pool + 3) >> 2);
m_memroot = (RWPage*)m_ctx.get_memroot();
ndbout_c("RWPool::init(%x, %d)",ri.m_type_id, m_record_info.m_size);
}
bool
RWPool::seize(Ptr<void>& ptr)
{
Uint32 pos = m_current_pos;
Uint32 size = m_record_info.m_size;
Uint32 off = m_record_info.m_offset_magic;
RWPage *pageP = m_current_page;
if (likely(m_current_first_free != REC_NIL))
{
seize_free:
pos = m_current_first_free;
ptr.i = (m_current_page_no << POOL_RECORD_BITS) + pos;
ptr.p = pageP->m_data + pos;
pageP->m_data[pos+off] = ~(Uint32)m_record_info.m_type_id;
m_current_ref_count++;
m_current_first_free = pageP->m_data[pos+m_record_info.m_offset_next_pool];
return true;
}
else if (pos + size < RWPage::RWPAGE_WORDS)
{
seize_first:
ptr.i = (m_current_page_no << POOL_RECORD_BITS) + pos;
ptr.p = (pageP->m_data + pos);
pageP->m_data[pos+off] = ~(Uint32)m_record_info.m_type_id;
m_current_ref_count++;
m_current_pos = pos + size;
return true;
}
if (m_current_page)
{
m_current_page->m_first_free = REC_NIL;
m_current_page->m_next_page = RNIL;
m_current_page->m_prev_page = RNIL;
m_current_page->m_type_id = m_record_info.m_type_id;
m_current_page->m_ref_count = m_current_ref_count;
}
if (m_first_free_page != RNIL)
{
pageP = m_current_page = m_memroot + m_first_free_page;
m_current_page_no = m_first_free_page;
m_current_pos = RWPage::RWPAGE_WORDS;
m_current_first_free = m_current_page->m_first_free;
m_first_free_page = m_current_page->m_next_page;
m_current_ref_count = m_current_page->m_ref_count;
if (m_first_free_page != RNIL)
{
(m_memroot + m_first_free_page)->m_prev_page = RNIL;
}
goto seize_free;
}
m_current_ref_count = 0;
RWPage* page;
Uint32 page_no = RNIL;
if ((page = (RWPage*)m_ctx.alloc_page(m_record_info.m_type_id, &page_no)))
{
pos = 0;
m_current_page_no = page_no;
pageP = m_current_page = page;
m_current_first_free = REC_NIL;
page->m_type_id = m_record_info.m_type_id;
goto seize_first;
}
m_current_page = 0;
m_current_page_no = RNIL;
m_current_pos = RWPage::RWPAGE_WORDS;
m_current_first_free = REC_NIL;
return false;
}
void
RWPool::release(Ptr<void> ptr)
{
Uint32 cur_page = m_current_page_no;
Uint32 ptr_page = ptr.i >> POOL_RECORD_BITS;
Uint32 *record_ptr = (Uint32*)ptr.p;
Uint32 magic_val = * (record_ptr + m_record_info.m_offset_magic);
if (likely(magic_val == ~(Uint32)m_record_info.m_type_id))
{
* (record_ptr + m_record_info.m_offset_magic) = 0;
if (cur_page == ptr_page)
{
* (record_ptr + m_record_info.m_offset_next_pool) = m_current_first_free;
assert(m_current_ref_count);
m_current_ref_count--;
m_current_first_free = ptr.i & POOL_RECORD_MASK;
return;
}
// Cache miss on page...
RWPage* page = m_memroot + ptr_page;
Uint32 ref_cnt = page->m_ref_count;
Uint32 ff = page->m_first_free;
* (record_ptr + m_record_info.m_offset_next_pool) = ff;
page->m_first_free = ptr.i & POOL_RECORD_MASK;
page->m_ref_count = ref_cnt - 1;
if (ff == REC_NIL)
{
/**
* It was full...add to free page list
*/
Uint32 ffp = m_first_free_page;
if (ffp != RNIL)
{
RWPage* next = (m_memroot + ffp);
assert(next->m_prev_page == RNIL);
next->m_prev_page = ptr_page;
}
page->m_next_page = ffp;
page->m_prev_page = RNIL;
m_first_free_page = ptr_page;
return;
}
else if(ref_cnt == 1)
{
/**
* It's now empty...release it
*/
Uint32 prev = page->m_prev_page;
Uint32 next = page->m_next_page;
if (prev != RNIL)
{
(m_memroot + prev)->m_next_page = next;
}
else
{
assert(m_first_free_page == ptr_page);
m_first_free_page = next;
}
if (next != RNIL)
{
(m_memroot + next)->m_prev_page = prev;
}
m_ctx.release_page(m_record_info.m_type_id, ptr_page);
return;
}
return;
}
handle_invalid_release(ptr);
}
void
RWPool::handle_invalid_release(Ptr<void> ptr)
{
char buf[255];
Uint32 pos = ptr.i & POOL_RECORD_MASK;
Uint32 pageI = ptr.i >> POOL_RECORD_BITS;
Uint32 * record_ptr_p = (Uint32*)ptr.p;
Uint32 * record_ptr_i = (m_memroot+pageI)->m_data + pos;
Uint32 magic = * (record_ptr_p + m_record_info.m_offset_magic);
snprintf(buf, sizeof(buf),
"Invalid memory release: ptr (%x %p %p) magic: (%.8x %.8x) memroot: %p page: %x",
ptr.i, ptr.p, record_ptr_i, magic, m_record_info.m_type_id,
m_memroot,
(m_memroot+pageI)->m_type_id);
m_ctx.handleAbort(NDBD_EXIT_PRGERR, buf);
}
void
RWPool::handle_invalid_get_ptr(Uint32 ptrI)
{
char buf[255];
Uint32 pos = ptrI & POOL_RECORD_MASK;
Uint32 pageI = ptrI >> POOL_RECORD_BITS;
Uint32 * record_ptr_i = (m_memroot+pageI)->m_data + pos;
Uint32 magic = * (record_ptr_i + m_record_info.m_offset_magic);
snprintf(buf, sizeof(buf),
"Invalid memory access: ptr (%x %p) magic: (%.8x %.8x) memroot: %p page: %x",
ptrI, record_ptr_i, magic, m_record_info.m_type_id,
m_memroot,
(m_memroot+pageI)->m_type_id);
m_ctx.handleAbort(NDBD_EXIT_PRGERR, buf);
}
|
