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
|
/****************************************************************
* *
* Copyright (c) 2001-2020 Fidelity National Information *
* Services, Inc. and/or its subsidiaries. All rights reserved. *
* *
* This source code contains the intellectual property *
* of its copyright holder(s), and is made available *
* under a license. If you do not know the terms of *
* the license, please stop and do not read further. *
* *
****************************************************************/
#ifndef MUTEXSP_H
#define MUTEXSP_H
#ifdef MUTEX_MSEM_WAKE
#ifdef POSIX_MSEM
#include "gtm_semaphore.h"
#else
#include <sys/mman.h>
#endif
#endif
#define MUTEX_INIT_SEMVAL LOCK_AVAILABLE
#define MUTEX_IMPOSSIBLE_SEMVAL -1024 /* Any value other than
* GLOBAL_LOCK_AVAILABLE,
* GLOBAL_LOCK_IN_USE, and
* REC_UNDER_PROGRESS */
#define MUTEX_CONST_TIMEOUT_VAL 16
#define MUTEX_NUM_WAIT_BITS 19 /* max p such that 2**p <= 10**6 */
#define MUTEX_INTR_SLPCNT 2
#define WRTPND_LSBIT_MASK 1
#define MUTEX_SOCK_DIR GTM_TMP_ENV
#define DEFAULT_MUTEX_SOCK_DIR DEFAULT_GTM_TMP
#define MUTEX_SOCK_FILE_PREFIX "gtm_mutex"
#define MAX_MUTEX_SOCKFILE_NAME_LEN (SIZEOF(MUTEX_SOCK_FILE_PREFIX) + MAX_DIGITS_IN_INT)
#define BIN_TOGGLE(x) ((x) ? 0 : 1)
#define HUNDRED_MSEC 100000
#define E_4 10000
#define ONE_MILLION 1000000
typedef struct
{
uint4 pid;
int mutex_wake_instance;
} mutex_wake_msg_t;
typedef enum
{
MUTEX_LOCK_WRITE,
MUTEX_LOCK_WRITE_IMMEDIATE
} mutex_lock_t;
/*
* Initialize a mutex with n que entries. If crash is TRUE, then this is
* a "crash" reinitialization; otherwise it's a "clean" initialization.
*/
void gtm_mutex_init(gd_region *reg, int n, bool crash);
/* gtm_mutex_lock - lock access to mutex for region reg */
/* gtm prefix added because solaris icu has a mutex_lock */
enum cdb_sc gtm_mutex_lock(gd_region *reg,
mutex_spin_parms_ptr_t mutex_spin_parms,
int crash_count,
mutex_lock_t mutex_lock_type,
wait_state state);
/* mutex_unlockw - unlock write access to mutex for region reg */
enum cdb_sc mutex_unlockw(gd_region *reg, int crash_count);
/* mutex_seed_init - set the seed for pseudo random mutex sleep times */
void mutex_seed_init(void);
void mutex_cleanup(gd_region *reg);
#ifdef MUTEX_MSEM_WAKE
# ifdef POSIX_MSEM
void mutex_wake_proc(sem_t *mutex_wake_msem_ptr);
# else
void mutex_wake_proc(msemaphore *mutex_wake_msem_ptr);
# endif
#else
void mutex_wake_proc(sm_int_ptr_t pid, int mutex_wake_instance);
#endif
void mutex_sock_init(void);
void mutex_sock_cleanup(void);
unsigned char *pid2ascx(unsigned char *pid_str, pid_t pid);
void mutex_per_process_init(void);
#ifdef MUTEX_MSEM_WAKE
#ifdef POSIX_MSEM
# define MSEM_LOCKW(X) sem_wait(X)
# define MSEM_LOCKNW(X) sem_trywait(X)
# define MSEM_UNLOCK(X) sem_post(X)
#else
# define MSEM_LOCKW(X) msem_lock(X, 0)
# define MSEM_LOCKNW(X) msem_lock(X, MSEM_IF_NOWAIT)
# define MSEM_UNLOCK(X) msem_unlock(X, 0)
#endif
#endif
#if defined(MUTEX_DEBUG) || defined(MUTEX_TRACE) || defined(MUTEX_TEST_RECOVERY)
#include "gtm_stdio.h"
#endif
#ifdef MUTEX_DEBUG
#define MUTEX_DPRINT1(p) {FPRINTF(stderr, p); FFLUSH(stderr);}
#define MUTEX_DPRINT2(p, q) {FPRINTF(stderr, p, q); FFLUSH(stderr);}
#define MUTEX_DPRINT3(p, q, r) {FPRINTF(stderr, p, q, r); FFLUSH(stderr);}
#define MUTEX_DPRINT4(p, q, r, s) {FPRINTF(stderr, p, q, r, s); FFLUSH(stderr);}
#define MUTEX_DPRINT5(p, q, r, s,t) {FPRINTF(stderr, p, q, r, s, t); FFLUSH(stderr);}
#else
#define MUTEX_DPRINT1(p)
#define MUTEX_DPRINT2(p, q)
#define MUTEX_DPRINT3(p, q, r)
#define MUTEX_DPRINT4(p, q, r, s)
#define MUTEX_DPRINT5(p, q, r, s, t)
#endif
#ifdef MUTEX_TRACE
#define DECLARE_MUTEX_TRACE_CNTRS \
GBLDEF int mutex_trc_lockw = 0; \
GBLDEF int mutex_trc_lockwim = 0; \
GBLDEF int mutex_trc_w_atmpts = 0; \
GBLREF int mutex_trc_mutex_slp_fn = 0; \
GBLREF int mutex_trc_mutex_slp_fn_noslp = 0; \
GBLDEF int mutex_trc_slp = 0; \
GBLDEF int mutex_trc_wt_short_slp = 0; \
GBLDEF int mutex_trc_wtim_short_slp = 0; \
GBLDEF int mutex_trc_slp_tmout = 0; \
GBLDEF int mutex_trc_intr_tmout = 0; \
GBLDEF int mutex_trc_slp_intr = 0; \
GBLDEF int mutex_trc_slp_wkup = 0; \
GBLDEF int mutex_trc_pgybckd_dlyd_wkup = 0; \
GBLDEF int mutex_trc_xplct_dlyd_wkup = 0; \
GBLDEF int mutex_trc_crit_wk = 0; \
GBLDEF int mutex_trc_dump_done = 0;
#define USE_MUTEX_TRACE_CNTRS \
GBLREF int mutex_trc_lockw; \
GBLREF int mutex_trc_lockwim; \
GBLREF int mutex_trc_w_atmpts; \
GBLREF int mutex_trc_mutex_slp_fn; \
GBLREF int mutex_trc_mutex_slp_fn_noslp; \
GBLREF int mutex_trc_slp; \
GBLREF int mutex_trc_wt_short_slp; \
GBLREF int mutex_trc_wtim_short_slp; \
GBLREF int mutex_trc_slp_tmout; \
GBLDEF int mutex_trc_intr_tmout; \
GBLDEF int mutex_trc_slp_intr; \
GBLREF int mutex_trc_slp_wkup; \
GBLREF int mutex_trc_pgybckd_dlyd_wkup; \
GBLREF int mutex_trc_xplct_dlyd_wkup; \
GBLREF int mutex_trc_crit_wk; \
GBLDEF int mutex_trc_dump_done;
#define MUTEX_TRACE_CNTR(x) ((x)++)
#define DUMP_MUTEX_TRACE_CNTRS \
if (!mutex_trc_dump_done) \
{ \
FPRINTF(stderr, "mutex_lockw : %d\n", mutex_trc_lockw);\
FPRINTF(stderr, "mutex_lockwim : %d\n", mutex_trc_lockwim);\
FPRINTF(stderr, "Lock write attempts : %d\n", mutex_trc_w_atmpts);\
FPRINTF(stderr, "Calls to mutex_sleep : %d\n", mutex_trc_mutex_slp_fn);\
FPRINTF(stderr, "Mutex_sleep no sleep : %d\n", mutex_trc_mutex_slp_fn_noslp);\
FPRINTF(stderr, "Write short sleep count : %d\n", mutex_trc_wt_short_slp);\
FPRINTF(stderr, "Wrt Imm short slp count : %d\n", mutex_trc_wtim_short_slp);\
FPRINTF(stderr, "Sleep timeout : %d\n", mutex_trc_slp_tmout);\
FPRINTF(stderr, "Sleep timeout caused by intr: %d\n", mutex_trc_intr_tmout);\
FPRINTF(stderr, "Sleep interrupted : %d\n", mutex_trc_slp_intr);\
FPRINTF(stderr, "Sleep woken up : %d\n", mutex_trc_slp_wkup);\
FPRINTF(stderr, "Dlyd pgybckd slp wkup : %d\n", mutex_trc_pgybckd_dlyd_wkup);\
FPRINTF(stderr, "Dlyd xplct slp wkup : %d\n", mutex_trc_xplct_dlyd_wkup);\
FPRINTF(stderr, "Crit wake others : %d\n", mutex_trc_crit_wk);\
mutex_trc_dump_done = 1;\
}
#else
#define DECLARE_MUTEX_TRACE_CNTRS
#define USE_MUTEX_TRACE_CNTRS
#define MUTEX_TRACE_CNTR(x)
#define DUMP_MUTEX_TRACE_CNTRS
#endif /* MUTEX_TRACE */
#ifdef MUTEX_TEST_RECOVERY
#include <signal.h>
#define DECLARE_MUTEX_TEST_SIGNAL_FLAG GBLDEF int mutex_test_signalled = FALSE;
#define USE_MUTEX_TEST_SIGNAL_FLAG GBLREF int mutex_test_signalled;
#define MUTEX_TEST_SIGNAL_HERE(x, y) \
if ((y) && !mutex_test_signalled) \
{ \
FPRINTF(stderr, x); \
FFLUSH(stderr); \
mutex_test_signalled = TRUE; \
exi_rundown(SIGQUIT); change this before use \
} \
else ;
#define MUTEX_TEST_PRINT1(p) {FPRINTF(stderr, p); FFLUSH(stderr);}
#define MUTEX_TEST_PRINT2(p, q) {FPRINTF(stderr, p, q); FFLUSH(stderr);}
#define MUTEX_TEST_PRINT3(p, q, r) {FPRINTF(stderr, p, q, r); FFLUSH(stderr);}
#define MUTEX_TEST_PRINT4(p, q, r, s) {FPRINTF(stderr, p, q, r, s); FFLUSH(stderr);}
#define MUTEX_TEST_PRINT5(p, q, r, s,t) {FPRINTF(stderr, p, q, r, s, t); FFLUSH(stderr);}
#else
#define DECLARE_MUTEX_TEST_SIGNAL_FLAG
#define USE_MUTEX_TEST_SIGNAL_FLAG
#define MUTEX_TEST_SIGNAL_HERE(x, y)
#define MUTEX_TEST_PRINT1(p)
#define MUTEX_TEST_PRINT2(p, q)
#define MUTEX_TEST_PRINT3(p, q, r)
#define MUTEX_TEST_PRINT4(p, q, r, s)
#define MUTEX_TEST_PRINT5(p, q, r, s, t)
#endif /* MUTEX_TEST */
#define TOO_MANY_REGIONS 1025 /* An arbitrary number that is a value much higher than the
* total # of database regions + jnlpools that a process is
* supposed to attach to. Used only in debug to ensure
* TREF(crit_reg_count) does not go too high.
*/
#define SET_CSA_NOW_CRIT_TRUE(CSA) \
MBSTART { \
(CSA)->now_crit = TRUE; \
(TREF(crit_reg_count))++; \
assert((0 < TREF(crit_reg_count)) && (TOO_MANY_REGIONS > TREF(crit_reg_count))); \
} MBEND
#define SET_CSA_NOW_CRIT_FALSE(CSA) \
MBSTART { \
(CSA)->now_crit = FALSE; \
(TREF(crit_reg_count))--; \
assert((0 <= TREF(crit_reg_count)) && (TOO_MANY_REGIONS > TREF(crit_reg_count))); \
} MBEND
#endif /* MUTEXSP_H */
|
