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
|
/* -*- c-basic-offset: 2 -*- */
/*
Copyright(C) 2014-2016 Brazil
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License version 2.1 as published by the Free Software Foundation.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA
*/
#include "grn_ctx.h"
#include "grn_ctx_impl.h"
#include "grn_request_canceler.h"
typedef struct _grn_request_canceler grn_request_canceler;
struct _grn_request_canceler {
grn_hash *entries;
grn_mutex mutex;
};
typedef struct _grn_request_canceler_entry grn_request_canceler_entry;
struct _grn_request_canceler_entry {
grn_ctx *ctx;
};
static grn_ctx grn_the_request_canceler_ctx;
static grn_request_canceler *grn_the_request_canceler = NULL;
grn_bool
grn_request_canceler_init(void)
{
grn_ctx *ctx = &grn_the_request_canceler_ctx;
grn_ctx_init(ctx, 0);
grn_the_request_canceler = GRN_MALLOC(sizeof(grn_request_canceler));
if (!grn_the_request_canceler) {
ERR(GRN_NO_MEMORY_AVAILABLE,
"[request-canceler] failed to allocate the global request canceler");
return GRN_FALSE;
}
grn_the_request_canceler->entries =
grn_hash_create(ctx, NULL, GRN_TABLE_MAX_KEY_SIZE,
sizeof(grn_request_canceler_entry), GRN_OBJ_KEY_VAR_SIZE);
if (!grn_the_request_canceler->entries) {
return GRN_FALSE;
}
MUTEX_INIT(grn_the_request_canceler->mutex);
return GRN_TRUE;
}
void
grn_request_canceler_register(grn_ctx *ctx,
const char *request_id, unsigned int size)
{
MUTEX_LOCK(grn_the_request_canceler->mutex);
{
grn_hash *entries = grn_the_request_canceler->entries;
grn_id id;
void *value;
id = grn_hash_add(&grn_the_request_canceler_ctx,
entries, request_id, size, &value, NULL);
if (id) {
grn_request_canceler_entry *entry = value;
entry->ctx = ctx;
}
}
MUTEX_UNLOCK(grn_the_request_canceler->mutex);
}
void
grn_request_canceler_unregister(grn_ctx *ctx,
const char *request_id, unsigned int size)
{
MUTEX_LOCK(grn_the_request_canceler->mutex);
{
grn_hash *entries = grn_the_request_canceler->entries;
grn_hash_delete(&grn_the_request_canceler_ctx,
entries, request_id, size, NULL);
}
MUTEX_UNLOCK(grn_the_request_canceler->mutex);
if (ctx->rc == GRN_CANCEL) {
ERRSET(ctx, GRN_LOG_NOTICE, ctx->rc,
"[request-canceler] a request is canceled: <%.*s>",
size, request_id);
}
}
static grn_bool
grn_request_canceler_cancel_entry(grn_request_canceler_entry *entry)
{
if (entry->ctx->rc == GRN_SUCCESS) {
entry->ctx->rc = GRN_CANCEL;
if (entry->ctx->impl->current_request_timer_id) {
void *timer_id = entry->ctx->impl->current_request_timer_id;
entry->ctx->impl->current_request_timer_id = NULL;
grn_request_timer_unregister(timer_id);
}
return GRN_TRUE;
} else {
return GRN_FALSE;
}
}
grn_bool
grn_request_canceler_cancel(const char *request_id, unsigned int size)
{
grn_bool canceled = GRN_FALSE;
MUTEX_LOCK(grn_the_request_canceler->mutex);
{
grn_ctx *ctx = &grn_the_request_canceler_ctx;
grn_hash *entries = grn_the_request_canceler->entries;
void *value;
if (grn_hash_get(ctx, entries, request_id, size, &value)) {
grn_request_canceler_entry *entry = value;
if (grn_request_canceler_cancel_entry(entry)) {
canceled = GRN_TRUE;
}
}
}
MUTEX_UNLOCK(grn_the_request_canceler->mutex);
return canceled;
}
grn_bool
grn_request_canceler_cancel_all(void)
{
grn_bool canceled = GRN_FALSE;
MUTEX_LOCK(grn_the_request_canceler->mutex);
{
grn_ctx *ctx = &grn_the_request_canceler_ctx;
grn_hash *entries = grn_the_request_canceler->entries;
grn_hash_cursor *cursor;
cursor = grn_hash_cursor_open(ctx, entries,
NULL, 0, NULL, 0,
0, -1, 0);
if (cursor) {
while (grn_hash_cursor_next(ctx, cursor) != GRN_ID_NIL) {
void *value;
if (grn_hash_cursor_get_value(ctx, cursor, &value) > 0) {
grn_request_canceler_entry *entry = value;
if (grn_request_canceler_cancel_entry(entry)) {
canceled = GRN_TRUE;
}
}
}
grn_hash_cursor_close(ctx, cursor);
}
}
MUTEX_UNLOCK(grn_the_request_canceler->mutex);
return canceled;
}
void
grn_request_canceler_fin(void)
{
grn_ctx *ctx = &grn_the_request_canceler_ctx;
grn_hash_close(ctx, grn_the_request_canceler->entries);
MUTEX_FIN(grn_the_request_canceler->mutex);
GRN_FREE(grn_the_request_canceler);
grn_the_request_canceler = NULL;
grn_ctx_fin(ctx);
}
|
