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
|
/*
*
* Copyright 2016 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.
*
*/
/* With the addition of a libuv endpoint, sockaddr.h now includes uv.h when
using that endpoint. Because of various transitive includes in uv.h,
including windows.h on Windows, uv.h must be included before other system
headers. Therefore, sockaddr.h must always be included first */
#include "src/core/lib/iomgr/sockaddr.h"
#include "test/core/util/passthru_endpoint.h"
#include <inttypes.h>
#include <string.h>
#include <grpc/support/alloc.h>
#include <grpc/support/string_util.h>
#include "src/core/lib/iomgr/sockaddr.h"
#include "src/core/lib/slice/slice_internal.h"
typedef struct passthru_endpoint passthru_endpoint;
typedef struct {
grpc_endpoint base;
passthru_endpoint *parent;
grpc_slice_buffer read_buffer;
grpc_slice_buffer *on_read_out;
grpc_closure *on_read;
grpc_resource_user *resource_user;
} half;
struct passthru_endpoint {
gpr_mu mu;
int halves;
grpc_passthru_endpoint_stats *stats;
grpc_passthru_endpoint_stats
dummy_stats; // used if constructor stats == NULL
bool shutdown;
half client;
half server;
};
static void me_read(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
grpc_slice_buffer *slices, grpc_closure *cb) {
half *m = (half *)ep;
gpr_mu_lock(&m->parent->mu);
if (m->parent->shutdown) {
grpc_closure_sched(
exec_ctx, cb, GRPC_ERROR_CREATE_FROM_STATIC_STRING("Already shutdown"));
} else if (m->read_buffer.count > 0) {
grpc_slice_buffer_swap(&m->read_buffer, slices);
grpc_closure_sched(exec_ctx, cb, GRPC_ERROR_NONE);
} else {
m->on_read = cb;
m->on_read_out = slices;
}
gpr_mu_unlock(&m->parent->mu);
}
static half *other_half(half *h) {
if (h == &h->parent->client) return &h->parent->server;
return &h->parent->client;
}
static void me_write(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
grpc_slice_buffer *slices, grpc_closure *cb) {
half *m = other_half((half *)ep);
gpr_mu_lock(&m->parent->mu);
grpc_error *error = GRPC_ERROR_NONE;
m->parent->stats->num_writes++;
if (m->parent->shutdown) {
error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Endpoint already shutdown");
} else if (m->on_read != NULL) {
for (size_t i = 0; i < slices->count; i++) {
grpc_slice_buffer_add(m->on_read_out, grpc_slice_copy(slices->slices[i]));
}
grpc_closure_sched(exec_ctx, m->on_read, GRPC_ERROR_NONE);
m->on_read = NULL;
} else {
for (size_t i = 0; i < slices->count; i++) {
grpc_slice_buffer_add(&m->read_buffer,
grpc_slice_copy(slices->slices[i]));
}
}
gpr_mu_unlock(&m->parent->mu);
grpc_closure_sched(exec_ctx, cb, error);
}
static void me_add_to_pollset(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
grpc_pollset *pollset) {}
static void me_add_to_pollset_set(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
grpc_pollset_set *pollset) {}
static void me_shutdown(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
grpc_error *why) {
half *m = (half *)ep;
gpr_mu_lock(&m->parent->mu);
m->parent->shutdown = true;
if (m->on_read) {
grpc_closure_sched(
exec_ctx, m->on_read,
GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING("Shutdown", &why, 1));
m->on_read = NULL;
}
m = other_half(m);
if (m->on_read) {
grpc_closure_sched(
exec_ctx, m->on_read,
GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING("Shutdown", &why, 1));
m->on_read = NULL;
}
gpr_mu_unlock(&m->parent->mu);
grpc_resource_user_shutdown(exec_ctx, m->resource_user);
GRPC_ERROR_UNREF(why);
}
static void me_destroy(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep) {
passthru_endpoint *p = ((half *)ep)->parent;
gpr_mu_lock(&p->mu);
if (0 == --p->halves) {
gpr_mu_unlock(&p->mu);
gpr_mu_destroy(&p->mu);
grpc_slice_buffer_destroy_internal(exec_ctx, &p->client.read_buffer);
grpc_slice_buffer_destroy_internal(exec_ctx, &p->server.read_buffer);
grpc_resource_user_unref(exec_ctx, p->client.resource_user);
grpc_resource_user_unref(exec_ctx, p->server.resource_user);
gpr_free(p);
} else {
gpr_mu_unlock(&p->mu);
}
}
static char *me_get_peer(grpc_endpoint *ep) {
passthru_endpoint *p = ((half *)ep)->parent;
return ((half *)ep) == &p->client ? gpr_strdup("fake:mock_client_endpoint")
: gpr_strdup("fake:mock_server_endpoint");
}
static int me_get_fd(grpc_endpoint *ep) { return -1; }
static grpc_resource_user *me_get_resource_user(grpc_endpoint *ep) {
half *m = (half *)ep;
return m->resource_user;
}
static const grpc_endpoint_vtable vtable = {
me_read, me_write, me_add_to_pollset, me_add_to_pollset_set,
me_shutdown, me_destroy, me_get_resource_user, me_get_peer,
me_get_fd,
};
static void half_init(half *m, passthru_endpoint *parent,
grpc_resource_quota *resource_quota,
const char *half_name) {
m->base.vtable = &vtable;
m->parent = parent;
grpc_slice_buffer_init(&m->read_buffer);
m->on_read = NULL;
char *name;
gpr_asprintf(&name, "passthru_endpoint_%s_%" PRIxPTR, half_name,
(intptr_t)parent);
m->resource_user = grpc_resource_user_create(resource_quota, name);
gpr_free(name);
}
void grpc_passthru_endpoint_create(grpc_endpoint **client,
grpc_endpoint **server,
grpc_resource_quota *resource_quota,
grpc_passthru_endpoint_stats *stats) {
passthru_endpoint *m = gpr_malloc(sizeof(*m));
m->halves = 2;
m->shutdown = 0;
m->stats = stats == NULL ? &m->dummy_stats : stats;
memset(m->stats, 0, sizeof(*m->stats));
half_init(&m->client, m, resource_quota, "client");
half_init(&m->server, m, resource_quota, "server");
gpr_mu_init(&m->mu);
*client = &m->client.base;
*server = &m->server.base;
}
|
