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 2016, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "src/core/lib/iomgr/port.h"
#ifdef GRPC_UV
#include <uv.h>
#include <string.h>
#include <grpc/support/log.h>
#include <grpc/support/sync.h>
#include "src/core/lib/iomgr/pollset.h"
#include "src/core/lib/iomgr/pollset_uv.h"
struct grpc_pollset {
uv_timer_t timer;
int shutting_down;
};
/* Indicates that grpc_pollset_work should run an iteration of the UV loop
before running callbacks. This defaults to 1, and should be disabled if
grpc_pollset_work will be called within the callstack of uv_run */
int grpc_pollset_work_run_loop;
gpr_mu grpc_polling_mu;
size_t grpc_pollset_size() { return sizeof(grpc_pollset); }
void grpc_pollset_global_init(void) {
gpr_mu_init(&grpc_polling_mu);
grpc_pollset_work_run_loop = 1;
}
void grpc_pollset_global_shutdown(void) { gpr_mu_destroy(&grpc_polling_mu); }
void grpc_pollset_init(grpc_pollset *pollset, gpr_mu **mu) {
*mu = &grpc_polling_mu;
memset(pollset, 0, sizeof(grpc_pollset));
uv_timer_init(uv_default_loop(), &pollset->timer);
pollset->shutting_down = 0;
}
static void timer_close_cb(uv_handle_t *handle) { handle->data = (void *)1; }
void grpc_pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
grpc_closure *closure) {
GPR_ASSERT(!pollset->shutting_down);
pollset->shutting_down = 1;
if (grpc_pollset_work_run_loop) {
// Drain any pending UV callbacks without blocking
uv_run(uv_default_loop(), UV_RUN_NOWAIT);
}
grpc_closure_sched(exec_ctx, closure, GRPC_ERROR_NONE);
}
void grpc_pollset_destroy(grpc_pollset *pollset) {
uv_close((uv_handle_t *)&pollset->timer, timer_close_cb);
// timer.data is a boolean indicating that the timer has finished closing
pollset->timer.data = (void *)0;
if (grpc_pollset_work_run_loop) {
while (!pollset->timer.data) {
uv_run(uv_default_loop(), UV_RUN_NOWAIT);
}
}
}
static void timer_run_cb(uv_timer_t *timer) {}
grpc_error *grpc_pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
grpc_pollset_worker **worker_hdl,
gpr_timespec now, gpr_timespec deadline) {
uint64_t timeout;
gpr_mu_unlock(&grpc_polling_mu);
if (grpc_pollset_work_run_loop) {
if (gpr_time_cmp(deadline, now) >= 0) {
timeout = (uint64_t)gpr_time_to_millis(gpr_time_sub(deadline, now));
} else {
timeout = 0;
}
/* We special-case timeout=0 so that we don't bother with the timer when
the loop won't block anyway */
if (timeout > 0) {
uv_timer_start(&pollset->timer, timer_run_cb, timeout, 0);
/* Run until there is some I/O activity or the timer triggers. It doesn't
matter which happens */
uv_run(uv_default_loop(), UV_RUN_ONCE);
uv_timer_stop(&pollset->timer);
} else {
uv_run(uv_default_loop(), UV_RUN_NOWAIT);
}
}
if (!grpc_closure_list_empty(exec_ctx->closure_list)) {
grpc_exec_ctx_flush(exec_ctx);
}
gpr_mu_lock(&grpc_polling_mu);
return GRPC_ERROR_NONE;
}
grpc_error *grpc_pollset_kick(grpc_pollset *pollset,
grpc_pollset_worker *specific_worker) {
return GRPC_ERROR_NONE;
}
#endif /* GRPC_UV */
|
