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
|
/*
*
* Copyright 2015 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include <grpc/support/port_platform.h>
#include <inttypes.h>
#include "src/core/lib/surface/alarm_internal.h"
#include <grpc/grpc.h>
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include "src/core/lib/iomgr/timer.h"
#include "src/core/lib/surface/completion_queue.h"
grpc_core::DebugOnlyTraceFlag grpc_trace_alarm_refcount(false,
"alarm_refcount");
struct grpc_alarm {
gpr_refcount refs;
grpc_timer alarm;
grpc_closure on_alarm;
grpc_cq_completion completion;
/** completion queue where events about this alarm will be posted */
grpc_completion_queue* cq;
/** user supplied tag */
void* tag;
};
static void alarm_ref(grpc_alarm* alarm) { gpr_ref(&alarm->refs); }
static void alarm_unref(grpc_alarm* alarm) {
if (gpr_unref(&alarm->refs)) {
grpc_core::ExecCtx exec_ctx;
if (alarm->cq != nullptr) {
GRPC_CQ_INTERNAL_UNREF(alarm->cq, "alarm");
}
gpr_free(alarm);
}
}
#ifndef NDEBUG
static void alarm_ref_dbg(grpc_alarm* alarm, const char* reason,
const char* file, int line) {
if (grpc_trace_alarm_refcount.enabled()) {
gpr_atm val = gpr_atm_no_barrier_load(&alarm->refs.count);
gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG,
"Alarm:%p ref %" PRIdPTR " -> %" PRIdPTR " %s", alarm, val,
val + 1, reason);
}
alarm_ref(alarm);
}
static void alarm_unref_dbg(grpc_alarm* alarm, const char* reason,
const char* file, int line) {
if (grpc_trace_alarm_refcount.enabled()) {
gpr_atm val = gpr_atm_no_barrier_load(&alarm->refs.count);
gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG,
"Alarm:%p Unref %" PRIdPTR " -> %" PRIdPTR " %s", alarm, val,
val - 1, reason);
}
alarm_unref(alarm);
}
#endif
static void alarm_end_completion(void* arg, grpc_cq_completion* c) {
grpc_alarm* alarm = (grpc_alarm*)arg;
GRPC_ALARM_UNREF(alarm, "dequeue-end-op");
}
static void alarm_cb(void* arg, grpc_error* error) {
grpc_alarm* alarm = (grpc_alarm*)arg;
/* We are queuing an op on completion queue. This means, the alarm's structure
cannot be destroyed until the op is dequeued. Adding an extra ref
here and unref'ing when the op is dequeued will achieve this */
GRPC_ALARM_REF(alarm, "queue-end-op");
grpc_cq_end_op(alarm->cq, alarm->tag, error, alarm_end_completion,
(void*)alarm, &alarm->completion);
}
grpc_alarm* grpc_alarm_create(void* reserved) {
grpc_alarm* alarm = (grpc_alarm*)gpr_malloc(sizeof(grpc_alarm));
#ifndef NDEBUG
if (grpc_trace_alarm_refcount.enabled()) {
gpr_log(GPR_DEBUG, "Alarm:%p created (ref: 1)", alarm);
}
#endif
gpr_ref_init(&alarm->refs, 1);
grpc_timer_init_unset(&alarm->alarm);
alarm->cq = nullptr;
GRPC_CLOSURE_INIT(&alarm->on_alarm, alarm_cb, alarm,
grpc_schedule_on_exec_ctx);
return alarm;
}
void grpc_alarm_set(grpc_alarm* alarm, grpc_completion_queue* cq,
gpr_timespec deadline, void* tag, void* reserved) {
grpc_core::ExecCtx exec_ctx;
GRPC_CQ_INTERNAL_REF(cq, "alarm");
alarm->cq = cq;
alarm->tag = tag;
GPR_ASSERT(grpc_cq_begin_op(cq, tag));
grpc_timer_init(&alarm->alarm, grpc_timespec_to_millis_round_up(deadline),
&alarm->on_alarm);
}
void grpc_alarm_cancel(grpc_alarm* alarm, void* reserved) {
grpc_core::ExecCtx exec_ctx;
grpc_timer_cancel(&alarm->alarm);
}
void grpc_alarm_destroy(grpc_alarm* alarm, void* reserved) {
grpc_alarm_cancel(alarm, reserved);
GRPC_ALARM_UNREF(alarm, "alarm_destroy");
}
|
