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
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
|
/*
*
* Copyright 2014, 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/surface/call.h"
#include "src/core/channel/channel_stack.h"
#include "src/core/channel/metadata_buffer.h"
#include "src/core/iomgr/alarm.h"
#include "src/core/support/string.h"
#include "src/core/surface/byte_buffer_queue.h"
#include "src/core/surface/channel.h"
#include "src/core/surface/completion_queue.h"
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
typedef struct legacy_state legacy_state;
static void destroy_legacy_state(legacy_state *ls);
typedef enum { REQ_INITIAL = 0, REQ_READY, REQ_DONE } req_state;
typedef enum {
SEND_NOTHING,
SEND_INITIAL_METADATA,
SEND_BUFFERED_INITIAL_METADATA,
SEND_MESSAGE,
SEND_BUFFERED_MESSAGE,
SEND_TRAILING_METADATA_AND_FINISH,
SEND_FINISH
} send_action;
typedef struct {
grpc_ioreq_completion_func on_complete;
void *user_data;
grpc_op_error status;
} completed_request;
/* See request_set in grpc_call below for a description */
#define REQSET_EMPTY 255
#define REQSET_DONE 254
typedef struct {
/* Overall status of the operation: starts OK, may degrade to
non-OK */
grpc_op_error status;
/* Completion function to call at the end of the operation */
grpc_ioreq_completion_func on_complete;
void *user_data;
/* a bit mask of which request ops are needed (1u << opid) */
gpr_uint32 need_mask;
/* a bit mask of which request ops are now completed */
gpr_uint32 complete_mask;
} reqinfo_master;
/* Status data for a request can come from several sources; this
enumerates them all, and acts as a priority sorting for which
status to return to the application - earlier entries override
later ones */
typedef enum {
/* Status came from the application layer overriding whatever
the wire says */
STATUS_FROM_API_OVERRIDE = 0,
/* Status came from 'the wire' - or somewhere below the surface
layer */
STATUS_FROM_WIRE,
STATUS_SOURCE_COUNT
} status_source;
typedef struct {
gpr_uint8 is_set;
grpc_status_code code;
grpc_mdstr *details;
} received_status;
/* How far through the GRPC stream have we read? */
typedef enum {
/* We are still waiting for initial metadata to complete */
READ_STATE_INITIAL = 0,
/* We have gotten initial metadata, and are reading either
messages or trailing metadata */
READ_STATE_GOT_INITIAL_METADATA,
/* The stream is closed for reading */
READ_STATE_READ_CLOSED,
/* The stream is closed for reading & writing */
READ_STATE_STREAM_CLOSED
} read_state;
typedef enum {
WRITE_STATE_INITIAL = 0,
WRITE_STATE_STARTED,
WRITE_STATE_WRITE_CLOSED
} write_state;
struct grpc_call {
grpc_completion_queue *cq;
grpc_channel *channel;
grpc_mdctx *metadata_context;
/* TODO(ctiller): share with cq if possible? */
gpr_mu mu;
/* how far through the stream have we read? */
read_state read_state;
/* how far through the stream have we written? */
write_state write_state;
/* client or server call */
gpr_uint8 is_client;
/* is the alarm set */
gpr_uint8 have_alarm;
/* are we currently performing a send operation */
gpr_uint8 sending;
/* pairs with completed_requests */
gpr_uint8 num_completed_requests;
/* flag that we need to request more data */
gpr_uint8 need_more_data;
/* Active ioreqs.
request_set and request_data contain one element per active ioreq
operation.
request_set[op] is an integer specifying a set of operations to which
the request belongs:
- if it is < GRPC_IOREQ_OP_COUNT, then this operation is pending
completion, and the integer represents to which group of operations
the ioreq belongs. Each group is represented by one master, and the
integer in request_set is an index into masters to find the master
data.
- if it is REQSET_EMPTY, the ioreq op is inactive and available to be
started
- finally, if request_set[op] is REQSET_DONE, then the operation is
complete and unavailable to be started again
request_data[op] is the request data as supplied by the initiator of
a request, and is valid iff request_set[op] <= GRPC_IOREQ_OP_COUNT.
The set fields are as per the request type specified by op.
Finally, one element of masters is set per active _set_ of ioreq
operations. It describes work left outstanding, result status, and
what work to perform upon operation completion. As one ioreq of each
op type can be active at once, by convention we choose the first element
of the group to be the master -- ie the master of in-progress operation
op is masters[request_set[op]]. This allows constant time allocation
and a strong upper bound of a count of masters to be calculated. */
gpr_uint8 request_set[GRPC_IOREQ_OP_COUNT];
grpc_ioreq_data request_data[GRPC_IOREQ_OP_COUNT];
reqinfo_master masters[GRPC_IOREQ_OP_COUNT];
/* Dynamic array of ioreq's that have completed: the count of
elements is queued in num_completed_requests.
This list is built up under lock(), and flushed entirely during
unlock().
We know the upper bound of the number of elements as we can only
have one ioreq of each type active at once. */
completed_request completed_requests[GRPC_IOREQ_OP_COUNT];
/* Incoming buffer of messages */
grpc_byte_buffer_queue incoming_queue;
/* Buffered read metadata waiting to be returned to the application.
Element 0 is initial metadata, element 1 is trailing metadata. */
grpc_metadata_array buffered_metadata[2];
/* All metadata received - unreffed at once at the end of the call */
grpc_mdelem **owned_metadata;
size_t owned_metadata_count;
size_t owned_metadata_capacity;
/* Received call statuses from various sources */
received_status status[STATUS_SOURCE_COUNT];
/* Deadline alarm - if have_alarm is non-zero */
grpc_alarm alarm;
/* Call refcount - to keep the call alive during asynchronous operations */
gpr_refcount internal_refcount;
/* Data that the legacy api needs to track. To be deleted at some point
soon */
legacy_state *legacy_state;
};
#define CALL_STACK_FROM_CALL(call) ((grpc_call_stack *)((call)+1))
#define CALL_FROM_CALL_STACK(call_stack) (((grpc_call *)(call_stack)) - 1)
#define CALL_ELEM_FROM_CALL(call, idx) \
grpc_call_stack_element(CALL_STACK_FROM_CALL(call), idx)
#define CALL_FROM_TOP_ELEM(top_elem) \
CALL_FROM_CALL_STACK(grpc_call_stack_from_top_element(top_elem))
#define SWAP(type, x, y) \
do { \
type temp = x; \
x = y; \
y = temp; \
} while (0)
static void do_nothing(void *ignored, grpc_op_error also_ignored) {}
static send_action choose_send_action(grpc_call *call);
static void enact_send_action(grpc_call *call, send_action sa);
grpc_call *grpc_call_create(grpc_channel *channel,
const void *server_transport_data) {
size_t i;
grpc_channel_stack *channel_stack = grpc_channel_get_channel_stack(channel);
grpc_call *call =
gpr_malloc(sizeof(grpc_call) + channel_stack->call_stack_size);
memset(call, 0, sizeof(grpc_call));
gpr_mu_init(&call->mu);
call->channel = channel;
call->is_client = server_transport_data == NULL;
for (i = 0; i < GRPC_IOREQ_OP_COUNT; i++) {
call->request_set[i] = REQSET_EMPTY;
}
if (call->is_client) {
call->request_set[GRPC_IOREQ_SEND_TRAILING_METADATA] = REQSET_DONE;
call->request_set[GRPC_IOREQ_SEND_STATUS] = REQSET_DONE;
}
grpc_channel_internal_ref(channel);
call->metadata_context = grpc_channel_get_metadata_context(channel);
/* one ref is dropped in response to destroy, the other in
stream_closed */
gpr_ref_init(&call->internal_refcount, 2);
grpc_call_stack_init(channel_stack, server_transport_data,
CALL_STACK_FROM_CALL(call));
return call;
}
void grpc_call_internal_ref(grpc_call *c) { gpr_ref(&c->internal_refcount); }
static void destroy_call(void *call, int ignored_success) {
size_t i;
grpc_call *c = call;
grpc_call_stack_destroy(CALL_STACK_FROM_CALL(c));
grpc_channel_internal_unref(c->channel);
gpr_mu_destroy(&c->mu);
for (i = 0; i < STATUS_SOURCE_COUNT; i++) {
if (c->status[i].details) {
grpc_mdstr_unref(c->status[i].details);
}
}
for (i = 0; i < c->owned_metadata_count; i++) {
grpc_mdelem_unref(c->owned_metadata[i]);
}
gpr_free(c->owned_metadata);
for (i = 0; i < GPR_ARRAY_SIZE(c->buffered_metadata); i++) {
gpr_free(c->buffered_metadata[i].metadata);
}
if (c->legacy_state) {
destroy_legacy_state(c->legacy_state);
}
grpc_bbq_destroy(&c->incoming_queue);
gpr_free(c);
}
void grpc_call_internal_unref(grpc_call *c, int allow_immediate_deletion) {
if (gpr_unref(&c->internal_refcount)) {
if (allow_immediate_deletion) {
destroy_call(c, 1);
} else {
grpc_iomgr_add_callback(destroy_call, c);
}
}
}
static void set_status_code(grpc_call *call, status_source source,
gpr_uint32 status) {
call->status[source].is_set = 1;
call->status[source].code = status;
}
static void set_status_details(grpc_call *call, status_source source,
grpc_mdstr *status) {
if (call->status[source].details != NULL) {
grpc_mdstr_unref(call->status[source].details);
}
call->status[source].details = status;
}
static grpc_call_error bind_cq(grpc_call *call, grpc_completion_queue *cq) {
if (call->cq) return GRPC_CALL_ERROR_ALREADY_INVOKED;
call->cq = cq;
return GRPC_CALL_OK;
}
static void request_more_data(grpc_call *call) {
grpc_call_op op;
/* call down */
op.type = GRPC_REQUEST_DATA;
op.dir = GRPC_CALL_DOWN;
op.flags = 0;
op.done_cb = do_nothing;
op.user_data = NULL;
grpc_call_execute_op(call, &op);
}
static int is_op_live(grpc_call *call, grpc_ioreq_op op) {
gpr_uint8 set = call->request_set[op];
reqinfo_master *master;
if (set >= GRPC_IOREQ_OP_COUNT) return 0;
master = &call->masters[set];
return (master->complete_mask & (1u << op)) == 0;
}
static void lock(grpc_call *call) { gpr_mu_lock(&call->mu); }
static void unlock(grpc_call *call) {
send_action sa = SEND_NOTHING;
completed_request completed_requests[GRPC_IOREQ_OP_COUNT];
int num_completed_requests = call->num_completed_requests;
int need_more_data =
call->need_more_data &&
!call->sending &&
call->write_state >= WRITE_STATE_STARTED;
int i;
if (need_more_data) {
call->need_more_data = 0;
}
if (num_completed_requests != 0) {
memcpy(completed_requests, call->completed_requests,
sizeof(completed_requests));
call->num_completed_requests = 0;
}
if (!call->sending) {
sa = choose_send_action(call);
if (sa != SEND_NOTHING) {
call->sending = 1;
grpc_call_internal_ref(call);
}
}
gpr_mu_unlock(&call->mu);
if (need_more_data) {
request_more_data(call);
}
if (sa != SEND_NOTHING) {
enact_send_action(call, sa);
}
for (i = 0; i < num_completed_requests; i++) {
completed_requests[i].on_complete(call, completed_requests[i].status,
completed_requests[i].user_data);
}
}
static void get_final_status(grpc_call *call, grpc_recv_status_args args) {
int i;
for (i = 0; i < STATUS_SOURCE_COUNT; i++) {
if (call->status[i].is_set) {
*args.code = call->status[i].code;
if (!args.details) return;
if (call->status[i].details) {
gpr_slice details = call->status[i].details->slice;
size_t len = GPR_SLICE_LENGTH(details);
if (len + 1 > *args.details_capacity) {
*args.details_capacity =
GPR_MAX(len + 1, *args.details_capacity * 3 / 2);
*args.details = gpr_realloc(*args.details, *args.details_capacity);
}
memcpy(*args.details, GPR_SLICE_START_PTR(details), len);
(*args.details)[len] = 0;
} else {
goto no_details;
}
return;
}
}
*args.code = GRPC_STATUS_UNKNOWN;
if (!args.details) return;
no_details:
if (0 == *args.details_capacity) {
*args.details_capacity = 8;
*args.details = gpr_malloc(*args.details_capacity);
}
**args.details = 0;
}
static void finish_live_ioreq_op(grpc_call *call, grpc_ioreq_op op,
grpc_op_error status) {
completed_request *cr;
gpr_uint8 master_set = call->request_set[op];
reqinfo_master *master;
size_t i;
/* ioreq is live: we need to do something */
master = &call->masters[master_set];
master->complete_mask |= 1u << op;
if (status != GRPC_OP_OK) {
master->status = status;
master->complete_mask = master->need_mask;
}
if (master->complete_mask == master->need_mask) {
for (i = 0; i < GRPC_IOREQ_OP_COUNT; i++) {
if (call->request_set[i] != master_set) {
continue;
}
call->request_set[i] = REQSET_DONE;
switch ((grpc_ioreq_op)i) {
case GRPC_IOREQ_RECV_MESSAGE:
case GRPC_IOREQ_SEND_MESSAGE:
if (master->status == GRPC_OP_OK) {
call->request_set[i] = REQSET_EMPTY;
} else {
call->write_state = WRITE_STATE_WRITE_CLOSED;
}
break;
case GRPC_IOREQ_RECV_CLOSE:
case GRPC_IOREQ_SEND_INITIAL_METADATA:
case GRPC_IOREQ_SEND_TRAILING_METADATA:
case GRPC_IOREQ_SEND_STATUS:
case GRPC_IOREQ_SEND_CLOSE:
break;
case GRPC_IOREQ_RECV_STATUS:
get_final_status(
call, call->request_data[GRPC_IOREQ_RECV_STATUS].recv_status);
break;
case GRPC_IOREQ_RECV_INITIAL_METADATA:
SWAP(grpc_metadata_array, call->buffered_metadata[0],
*call->request_data[GRPC_IOREQ_RECV_INITIAL_METADATA]
.recv_metadata);
break;
case GRPC_IOREQ_RECV_TRAILING_METADATA:
SWAP(grpc_metadata_array, call->buffered_metadata[1],
*call->request_data[GRPC_IOREQ_RECV_TRAILING_METADATA]
.recv_metadata);
break;
case GRPC_IOREQ_OP_COUNT:
abort();
break;
}
}
cr = &call->completed_requests[call->num_completed_requests++];
cr->status = master->status;
cr->on_complete = master->on_complete;
cr->user_data = master->user_data;
}
}
static void finish_ioreq_op(grpc_call *call, grpc_ioreq_op op,
grpc_op_error status) {
if (is_op_live(call, op)) {
finish_live_ioreq_op(call, op, status);
}
}
static void finish_send_op(grpc_call *call, grpc_ioreq_op op,
grpc_op_error error) {
lock(call);
finish_ioreq_op(call, op, error);
call->sending = 0;
unlock(call);
grpc_call_internal_unref(call, 0);
}
static void finish_write_step(void *pc, grpc_op_error error) {
finish_send_op(pc, GRPC_IOREQ_SEND_MESSAGE, error);
}
static void finish_finish_step(void *pc, grpc_op_error error) {
finish_send_op(pc, GRPC_IOREQ_SEND_CLOSE, error);
}
static void finish_start_step(void *pc, grpc_op_error error) {
finish_send_op(pc, GRPC_IOREQ_SEND_INITIAL_METADATA, error);
}
static send_action choose_send_action(grpc_call *call) {
switch (call->write_state) {
case WRITE_STATE_INITIAL:
if (is_op_live(call, GRPC_IOREQ_SEND_INITIAL_METADATA)) {
call->write_state = WRITE_STATE_STARTED;
if (is_op_live(call, GRPC_IOREQ_SEND_MESSAGE) || is_op_live(call, GRPC_IOREQ_SEND_CLOSE)) {
return SEND_BUFFERED_INITIAL_METADATA;
} else {
return SEND_INITIAL_METADATA;
}
}
return SEND_NOTHING;
case WRITE_STATE_STARTED:
if (is_op_live(call, GRPC_IOREQ_SEND_MESSAGE)) {
if (is_op_live(call, GRPC_IOREQ_SEND_CLOSE)) {
return SEND_BUFFERED_MESSAGE;
} else {
return SEND_MESSAGE;
}
} else if (is_op_live(call, GRPC_IOREQ_SEND_CLOSE)) {
call->write_state = WRITE_STATE_WRITE_CLOSED;
finish_ioreq_op(call, GRPC_IOREQ_SEND_TRAILING_METADATA, GRPC_OP_OK);
finish_ioreq_op(call, GRPC_IOREQ_SEND_STATUS, GRPC_OP_OK);
if (call->is_client) {
return SEND_FINISH;
} else {
return SEND_TRAILING_METADATA_AND_FINISH;
}
}
return SEND_NOTHING;
case WRITE_STATE_WRITE_CLOSED:
return SEND_NOTHING;
}
gpr_log(GPR_ERROR, "should never reach here");
abort();
return SEND_NOTHING;
}
static void send_metadata(grpc_call *call, grpc_mdelem *elem) {
grpc_call_op op;
op.type = GRPC_SEND_METADATA;
op.dir = GRPC_CALL_DOWN;
op.flags = GRPC_WRITE_BUFFER_HINT;
op.data.metadata = elem;
op.done_cb = do_nothing;
op.user_data = NULL;
grpc_call_execute_op(call, &op);
}
static void enact_send_action(grpc_call *call, send_action sa) {
grpc_ioreq_data data;
grpc_call_op op;
size_t i;
gpr_uint32 flags = 0;
char status_str[GPR_LTOA_MIN_BUFSIZE];
switch (sa) {
case SEND_NOTHING:
abort();
break;
case SEND_BUFFERED_INITIAL_METADATA:
flags |= GRPC_WRITE_BUFFER_HINT;
/* fallthrough */
case SEND_INITIAL_METADATA:
data = call->request_data[GRPC_IOREQ_SEND_INITIAL_METADATA];
for (i = 0; i < data.send_metadata.count; i++) {
const grpc_metadata *md = &data.send_metadata.metadata[i];
send_metadata(call,
grpc_mdelem_from_string_and_buffer(
call->metadata_context, md->key,
(const gpr_uint8 *)md->value, md->value_length));
}
op.type = GRPC_SEND_START;
op.dir = GRPC_CALL_DOWN;
op.flags = flags;
op.data.start.pollset = grpc_cq_pollset(call->cq);
op.done_cb = finish_start_step;
op.user_data = call;
grpc_call_execute_op(call, &op);
break;
case SEND_BUFFERED_MESSAGE:
flags |= GRPC_WRITE_BUFFER_HINT;
/* fallthrough */
case SEND_MESSAGE:
data = call->request_data[GRPC_IOREQ_SEND_MESSAGE];
op.type = GRPC_SEND_MESSAGE;
op.dir = GRPC_CALL_DOWN;
op.flags = flags;
op.data.message = data.send_message;
op.done_cb = finish_write_step;
op.user_data = call;
grpc_call_execute_op(call, &op);
break;
case SEND_TRAILING_METADATA_AND_FINISH:
/* send trailing metadata */
data = call->request_data[GRPC_IOREQ_SEND_TRAILING_METADATA];
for (i = 0; i < data.send_metadata.count; i++) {
const grpc_metadata *md = &data.send_metadata.metadata[i];
send_metadata(call,
grpc_mdelem_from_string_and_buffer(
call->metadata_context, md->key,
(const gpr_uint8 *)md->value, md->value_length));
}
/* send status */
/* TODO(ctiller): cache common status values */
data = call->request_data[GRPC_IOREQ_SEND_STATUS];
gpr_ltoa(data.send_status.code, status_str);
send_metadata(
call,
grpc_mdelem_from_metadata_strings(
call->metadata_context,
grpc_mdstr_ref(grpc_channel_get_status_string(call->channel)),
grpc_mdstr_from_string(call->metadata_context, status_str)));
if (data.send_status.details) {
send_metadata(
call,
grpc_mdelem_from_metadata_strings(
call->metadata_context,
grpc_mdstr_ref(grpc_channel_get_message_string(call->channel)),
grpc_mdstr_from_string(call->metadata_context,
data.send_status.details)));
}
/* fallthrough: see choose_send_action for details */
case SEND_FINISH:
op.type = GRPC_SEND_FINISH;
op.dir = GRPC_CALL_DOWN;
op.flags = 0;
op.done_cb = finish_finish_step;
op.user_data = call;
grpc_call_execute_op(call, &op);
break;
}
}
static grpc_call_error start_ioreq_error(grpc_call *call,
gpr_uint32 mutated_ops,
grpc_call_error ret) {
size_t i;
for (i = 0; i < GRPC_IOREQ_OP_COUNT; i++) {
if (mutated_ops & (1u << i)) {
call->request_set[i] = REQSET_EMPTY;
}
}
return ret;
}
static void finish_read_ops(grpc_call *call) {
int empty;
if (is_op_live(call, GRPC_IOREQ_RECV_MESSAGE)) {
empty =
(NULL == (*call->request_data[GRPC_IOREQ_RECV_MESSAGE].recv_message =
grpc_bbq_pop(&call->incoming_queue)));
if (!empty) {
finish_live_ioreq_op(call, GRPC_IOREQ_RECV_MESSAGE, GRPC_OP_OK);
empty = grpc_bbq_empty(&call->incoming_queue);
}
} else {
empty = grpc_bbq_empty(&call->incoming_queue);
}
switch (call->read_state) {
case READ_STATE_STREAM_CLOSED:
if (empty) {
finish_ioreq_op(call, GRPC_IOREQ_RECV_CLOSE, GRPC_OP_OK);
}
/* fallthrough */
case READ_STATE_READ_CLOSED:
if (empty) {
finish_ioreq_op(call, GRPC_IOREQ_RECV_MESSAGE, GRPC_OP_OK);
}
finish_ioreq_op(call, GRPC_IOREQ_RECV_STATUS, GRPC_OP_OK);
finish_ioreq_op(call, GRPC_IOREQ_RECV_TRAILING_METADATA, GRPC_OP_OK);
/* fallthrough */
case READ_STATE_GOT_INITIAL_METADATA:
finish_ioreq_op(call, GRPC_IOREQ_RECV_INITIAL_METADATA, GRPC_OP_OK);
/* fallthrough */
case READ_STATE_INITIAL:
/* do nothing */
break;
}
}
static void early_out_write_ops(grpc_call *call) {
switch (call->write_state) {
case WRITE_STATE_WRITE_CLOSED:
finish_ioreq_op(call, GRPC_IOREQ_SEND_MESSAGE, GRPC_OP_ERROR);
finish_ioreq_op(call, GRPC_IOREQ_SEND_STATUS, GRPC_OP_ERROR);
finish_ioreq_op(call, GRPC_IOREQ_SEND_TRAILING_METADATA, GRPC_OP_ERROR);
finish_ioreq_op(call, GRPC_IOREQ_SEND_CLOSE, GRPC_OP_OK);
/* fallthrough */
case WRITE_STATE_STARTED:
finish_ioreq_op(call, GRPC_IOREQ_SEND_INITIAL_METADATA, GRPC_OP_ERROR);
/* fallthrough */
case WRITE_STATE_INITIAL:
/* do nothing */
break;
}
}
static grpc_call_error start_ioreq(grpc_call *call, const grpc_ioreq *reqs,
size_t nreqs,
grpc_ioreq_completion_func completion,
void *user_data) {
size_t i;
gpr_uint32 have_ops = 0;
grpc_ioreq_op op;
reqinfo_master *master;
grpc_ioreq_data data;
gpr_uint8 set;
if (nreqs == 0) {
return GRPC_CALL_OK;
}
set = reqs[0].op;
for (i = 0; i < nreqs; i++) {
op = reqs[i].op;
if (call->request_set[op] < GRPC_IOREQ_OP_COUNT) {
return start_ioreq_error(call, have_ops,
GRPC_CALL_ERROR_TOO_MANY_OPERATIONS);
} else if (call->request_set[op] == REQSET_DONE) {
return start_ioreq_error(call, have_ops, GRPC_CALL_ERROR_ALREADY_INVOKED);
}
have_ops |= 1u << op;
data = reqs[i].data;
call->request_data[op] = data;
call->request_set[op] = set;
}
master = &call->masters[set];
master->status = GRPC_OP_OK;
master->need_mask = have_ops;
master->complete_mask = 0;
master->on_complete = completion;
master->user_data = user_data;
if (have_ops & (1u << GRPC_IOREQ_RECV_MESSAGE)) {
call->need_more_data = 1;
}
finish_read_ops(call);
early_out_write_ops(call);
return GRPC_CALL_OK;
}
static void call_start_ioreq_done(grpc_call *call, grpc_op_error status,
void *user_data) {
grpc_cq_end_ioreq(call->cq, user_data, call, do_nothing, NULL, status);
}
grpc_call_error grpc_call_start_ioreq(grpc_call *call, const grpc_ioreq *reqs,
size_t nreqs, void *tag) {
grpc_call_error err;
lock(call);
err = start_ioreq(call, reqs, nreqs, call_start_ioreq_done, tag);
unlock(call);
return err;
}
grpc_call_error grpc_call_start_ioreq_and_call_back(
grpc_call *call, const grpc_ioreq *reqs, size_t nreqs,
grpc_ioreq_completion_func on_complete, void *user_data) {
grpc_call_error err;
lock(call);
err = start_ioreq(call, reqs, nreqs, on_complete, user_data);
unlock(call);
return err;
}
void grpc_call_destroy(grpc_call *c) {
int cancel;
lock(c);
if (c->have_alarm) {
grpc_alarm_cancel(&c->alarm);
c->have_alarm = 0;
}
cancel = c->read_state != READ_STATE_STREAM_CLOSED;
unlock(c);
if (cancel) grpc_call_cancel(c);
grpc_call_internal_unref(c, 1);
}
grpc_call_error grpc_call_cancel(grpc_call *c) {
grpc_call_element *elem;
grpc_call_op op;
op.type = GRPC_CANCEL_OP;
op.dir = GRPC_CALL_DOWN;
op.flags = 0;
op.done_cb = do_nothing;
op.user_data = NULL;
elem = CALL_ELEM_FROM_CALL(c, 0);
elem->filter->call_op(elem, NULL, &op);
return GRPC_CALL_OK;
}
grpc_call_error grpc_call_cancel_with_status(grpc_call *c,
grpc_status_code status,
const char *description) {
grpc_mdstr *details =
description ? grpc_mdstr_from_string(c->metadata_context, description)
: NULL;
lock(c);
set_status_code(c, STATUS_FROM_API_OVERRIDE, status);
set_status_details(c, STATUS_FROM_API_OVERRIDE, details);
unlock(c);
return grpc_call_cancel(c);
}
void grpc_call_execute_op(grpc_call *call, grpc_call_op *op) {
grpc_call_element *elem;
GPR_ASSERT(op->dir == GRPC_CALL_DOWN);
elem = CALL_ELEM_FROM_CALL(call, 0);
elem->filter->call_op(elem, NULL, op);
}
grpc_call *grpc_call_from_top_element(grpc_call_element *elem) {
return CALL_FROM_TOP_ELEM(elem);
}
static void call_alarm(void *arg, int success) {
grpc_call *call = arg;
if (success) {
if (call->is_client) {
grpc_call_cancel_with_status(call, GRPC_STATUS_DEADLINE_EXCEEDED,
"Deadline Exceeded");
} else {
grpc_call_cancel(call);
}
}
grpc_call_internal_unref(call, 1);
}
void grpc_call_set_deadline(grpc_call_element *elem, gpr_timespec deadline) {
grpc_call *call = CALL_FROM_TOP_ELEM(elem);
if (call->have_alarm) {
gpr_log(GPR_ERROR, "Attempt to set deadline alarm twice");
}
grpc_call_internal_ref(call);
call->have_alarm = 1;
grpc_alarm_init(&call->alarm, deadline, call_alarm, call, gpr_now());
}
static void set_read_state(grpc_call *call, read_state state) {
lock(call);
GPR_ASSERT(call->read_state < state);
call->read_state = state;
finish_read_ops(call);
unlock(call);
}
void grpc_call_read_closed(grpc_call_element *elem) {
set_read_state(CALL_FROM_TOP_ELEM(elem), READ_STATE_READ_CLOSED);
}
void grpc_call_stream_closed(grpc_call_element *elem) {
grpc_call *call = CALL_FROM_TOP_ELEM(elem);
set_read_state(call, READ_STATE_STREAM_CLOSED);
grpc_call_internal_unref(call, 0);
}
/* we offset status by a small amount when storing it into transport metadata
as metadata cannot store a 0 value (which is used as OK for grpc_status_codes
*/
#define STATUS_OFFSET 1
static void destroy_status(void *ignored) {}
static gpr_uint32 decode_status(grpc_mdelem *md) {
gpr_uint32 status;
void *user_data = grpc_mdelem_get_user_data(md, destroy_status);
if (user_data) {
status = ((gpr_uint32)(gpr_intptr) user_data) - STATUS_OFFSET;
} else {
if (!gpr_parse_bytes_to_uint32(grpc_mdstr_as_c_string(md->value),
GPR_SLICE_LENGTH(md->value->slice),
&status)) {
status = GRPC_STATUS_UNKNOWN; /* could not parse status code */
}
grpc_mdelem_set_user_data(md, destroy_status,
(void *)(gpr_intptr)(status + STATUS_OFFSET));
}
return status;
}
void grpc_call_recv_message(grpc_call_element *elem,
grpc_byte_buffer *byte_buffer) {
grpc_call *call = CALL_FROM_TOP_ELEM(elem);
lock(call);
grpc_bbq_push(&call->incoming_queue, byte_buffer);
finish_read_ops(call);
unlock(call);
}
void grpc_call_recv_metadata(grpc_call_element *elem, grpc_mdelem *md) {
grpc_call *call = CALL_FROM_TOP_ELEM(elem);
grpc_mdstr *key = md->key;
grpc_metadata_array *dest;
grpc_metadata *mdusr;
lock(call);
if (key == grpc_channel_get_status_string(call->channel)) {
set_status_code(call, STATUS_FROM_WIRE, decode_status(md));
grpc_mdelem_unref(md);
} else if (key == grpc_channel_get_message_string(call->channel)) {
set_status_details(call, STATUS_FROM_WIRE, grpc_mdstr_ref(md->value));
grpc_mdelem_unref(md);
} else {
dest = &call->buffered_metadata[call->read_state >=
READ_STATE_GOT_INITIAL_METADATA];
if (dest->count == dest->capacity) {
dest->capacity = GPR_MAX(dest->capacity + 8, dest->capacity * 2);
dest->metadata =
gpr_realloc(dest->metadata, sizeof(grpc_metadata) * dest->capacity);
}
mdusr = &dest->metadata[dest->count++];
mdusr->key = (char *)grpc_mdstr_as_c_string(md->key);
mdusr->value = (char *)grpc_mdstr_as_c_string(md->value);
mdusr->value_length = GPR_SLICE_LENGTH(md->value->slice);
if (call->owned_metadata_count == call->owned_metadata_capacity) {
call->owned_metadata_capacity = GPR_MAX(
call->owned_metadata_capacity + 8, call->owned_metadata_capacity * 2);
call->owned_metadata =
gpr_realloc(call->owned_metadata,
sizeof(grpc_mdelem *) * call->owned_metadata_capacity);
}
call->owned_metadata[call->owned_metadata_count++] = md;
}
unlock(call);
}
grpc_call_stack *grpc_call_get_call_stack(grpc_call *call) {
return CALL_STACK_FROM_CALL(call);
}
void grpc_call_initial_metadata_complete(grpc_call_element *surface_element) {
grpc_call *call = grpc_call_from_top_element(surface_element);
set_read_state(call, READ_STATE_GOT_INITIAL_METADATA);
}
/*
* LEGACY API IMPLEMENTATION
* All this code will disappear as soon as wrappings are updated
*/
struct legacy_state {
gpr_uint8 md_out_buffer;
size_t md_out_count[2];
size_t md_out_capacity[2];
grpc_metadata *md_out[2];
grpc_byte_buffer *msg_out;
/* input buffers */
grpc_metadata_array initial_md_in;
grpc_metadata_array trailing_md_in;
size_t details_capacity;
char *details;
grpc_status_code status;
char *send_details;
size_t msg_in_read_idx;
grpc_byte_buffer *msg_in;
void *finished_tag;
};
static legacy_state *get_legacy_state(grpc_call *call) {
if (call->legacy_state == NULL) {
call->legacy_state = gpr_malloc(sizeof(legacy_state));
memset(call->legacy_state, 0, sizeof(legacy_state));
}
return call->legacy_state;
}
static void destroy_legacy_state(legacy_state *ls) {
size_t i, j;
for (i = 0; i < 2; i++) {
for (j = 0; j < ls->md_out_count[i]; j++) {
gpr_free(ls->md_out[i][j].key);
gpr_free(ls->md_out[i][j].value);
}
gpr_free(ls->md_out[i]);
}
gpr_free(ls->initial_md_in.metadata);
gpr_free(ls->trailing_md_in.metadata);
gpr_free(ls->details);
gpr_free(ls->send_details);
gpr_free(ls);
}
grpc_call_error grpc_call_add_metadata_old(grpc_call *call,
grpc_metadata *metadata,
gpr_uint32 flags) {
legacy_state *ls;
grpc_metadata *mdout;
lock(call);
ls = get_legacy_state(call);
if (ls->md_out_count[ls->md_out_buffer] ==
ls->md_out_capacity[ls->md_out_buffer]) {
ls->md_out_capacity[ls->md_out_buffer] =
GPR_MAX(ls->md_out_capacity[ls->md_out_buffer] * 3 / 2,
ls->md_out_capacity[ls->md_out_buffer] + 8);
ls->md_out[ls->md_out_buffer] = gpr_realloc(
ls->md_out[ls->md_out_buffer],
sizeof(grpc_metadata) * ls->md_out_capacity[ls->md_out_buffer]);
}
mdout = &ls->md_out[ls->md_out_buffer][ls->md_out_count[ls->md_out_buffer]++];
mdout->key = gpr_strdup(metadata->key);
mdout->value = gpr_malloc(metadata->value_length);
mdout->value_length = metadata->value_length;
memcpy(mdout->value, metadata->value, metadata->value_length);
unlock(call);
return GRPC_CALL_OK;
}
static void finish_status(grpc_call *call, grpc_op_error status,
void *ignored) {
legacy_state *ls;
lock(call);
ls = get_legacy_state(call);
grpc_cq_end_finished(call->cq, ls->finished_tag, call, do_nothing, NULL,
ls->status, ls->details, ls->trailing_md_in.metadata,
ls->trailing_md_in.count);
unlock(call);
}
static void finish_recv_metadata(grpc_call *call, grpc_op_error status,
void *tag) {
legacy_state *ls;
lock(call);
ls = get_legacy_state(call);
if (status == GRPC_OP_OK) {
grpc_cq_end_client_metadata_read(call->cq, tag, call, do_nothing, NULL,
ls->initial_md_in.count,
ls->initial_md_in.metadata);
} else {
grpc_cq_end_client_metadata_read(call->cq, tag, call, do_nothing, NULL, 0,
NULL);
}
unlock(call);
}
static void finish_send_metadata(grpc_call *call, grpc_op_error status,
void *tag) {}
grpc_call_error grpc_call_invoke_old(grpc_call *call, grpc_completion_queue *cq,
void *metadata_read_tag,
void *finished_tag, gpr_uint32 flags) {
grpc_ioreq reqs[3];
legacy_state *ls;
grpc_call_error err;
grpc_cq_begin_op(cq, call, GRPC_CLIENT_METADATA_READ);
grpc_cq_begin_op(cq, call, GRPC_FINISHED);
lock(call);
ls = get_legacy_state(call);
err = bind_cq(call, cq);
if (err != GRPC_CALL_OK) goto done;
ls->finished_tag = finished_tag;
reqs[0].op = GRPC_IOREQ_SEND_INITIAL_METADATA;
reqs[0].data.send_metadata.count = ls->md_out_count[ls->md_out_buffer];
reqs[0].data.send_metadata.metadata = ls->md_out[ls->md_out_buffer];
ls->md_out_buffer++;
err = start_ioreq(call, reqs, 1, finish_send_metadata, NULL);
if (err != GRPC_CALL_OK) goto done;
reqs[0].op = GRPC_IOREQ_RECV_INITIAL_METADATA;
reqs[0].data.recv_metadata = &ls->initial_md_in;
err = start_ioreq(call, reqs, 1, finish_recv_metadata, metadata_read_tag);
if (err != GRPC_CALL_OK) goto done;
reqs[0].op = GRPC_IOREQ_RECV_TRAILING_METADATA;
reqs[0].data.recv_metadata = &ls->trailing_md_in;
reqs[1].op = GRPC_IOREQ_RECV_STATUS;
reqs[1].data.recv_status.details = &ls->details;
reqs[1].data.recv_status.details_capacity = &ls->details_capacity;
reqs[1].data.recv_status.code = &ls->status;
reqs[2].op = GRPC_IOREQ_RECV_CLOSE;
err = start_ioreq(call, reqs, 3, finish_status, NULL);
if (err != GRPC_CALL_OK) goto done;
done:
unlock(call);
return err;
}
grpc_call_error grpc_call_server_accept_old(grpc_call *call,
grpc_completion_queue *cq,
void *finished_tag) {
grpc_ioreq reqs[2];
grpc_call_error err;
legacy_state *ls;
/* inform the completion queue of an incoming operation (corresponding to
finished_tag) */
grpc_cq_begin_op(cq, call, GRPC_FINISHED);
lock(call);
ls = get_legacy_state(call);
err = bind_cq(call, cq);
if (err != GRPC_CALL_OK) {
unlock(call);
return err;
}
ls->finished_tag = finished_tag;
reqs[0].op = GRPC_IOREQ_RECV_STATUS;
reqs[0].data.recv_status.details = NULL;
reqs[0].data.recv_status.details_capacity = 0;
reqs[0].data.recv_status.code = &ls->status;
reqs[1].op = GRPC_IOREQ_RECV_CLOSE;
err = start_ioreq(call, reqs, 2, finish_status, NULL);
unlock(call);
return err;
}
static void finish_send_initial_metadata(grpc_call *call, grpc_op_error status,
void *tag) {}
grpc_call_error grpc_call_server_end_initial_metadata_old(grpc_call *call,
gpr_uint32 flags) {
grpc_ioreq req;
grpc_call_error err;
legacy_state *ls;
lock(call);
ls = get_legacy_state(call);
req.op = GRPC_IOREQ_SEND_INITIAL_METADATA;
req.data.send_metadata.count = ls->md_out_count[ls->md_out_buffer];
req.data.send_metadata.metadata = ls->md_out[ls->md_out_buffer];
err = start_ioreq(call, &req, 1, finish_send_initial_metadata, NULL);
unlock(call);
return err;
}
static void finish_read_event(void *p, grpc_op_error error) {
if (p) grpc_byte_buffer_destroy(p);
}
static void finish_read(grpc_call *call, grpc_op_error error, void *tag) {
legacy_state *ls;
grpc_byte_buffer *msg;
lock(call);
ls = get_legacy_state(call);
msg = ls->msg_in;
grpc_cq_end_read(call->cq, tag, call, finish_read_event, msg, msg);
unlock(call);
}
grpc_call_error grpc_call_start_read_old(grpc_call *call, void *tag) {
legacy_state *ls;
grpc_ioreq req;
grpc_call_error err;
grpc_cq_begin_op(call->cq, call, GRPC_READ);
lock(call);
ls = get_legacy_state(call);
req.op = GRPC_IOREQ_RECV_MESSAGE;
req.data.recv_message = &ls->msg_in;
err = start_ioreq(call, &req, 1, finish_read, tag);
unlock(call);
return err;
}
static void finish_write(grpc_call *call, grpc_op_error status, void *tag) {
lock(call);
grpc_byte_buffer_destroy(get_legacy_state(call)->msg_out);
unlock(call);
grpc_cq_end_write_accepted(call->cq, tag, call, do_nothing, NULL, status);
}
grpc_call_error grpc_call_start_write_old(grpc_call *call,
grpc_byte_buffer *byte_buffer,
void *tag, gpr_uint32 flags) {
grpc_ioreq req;
legacy_state *ls;
grpc_call_error err;
grpc_cq_begin_op(call->cq, call, GRPC_WRITE_ACCEPTED);
lock(call);
ls = get_legacy_state(call);
ls->msg_out = grpc_byte_buffer_copy(byte_buffer);
req.op = GRPC_IOREQ_SEND_MESSAGE;
req.data.send_message = ls->msg_out;
err = start_ioreq(call, &req, 1, finish_write, tag);
unlock(call);
return err;
}
static void finish_finish(grpc_call *call, grpc_op_error status, void *tag) {
grpc_cq_end_finish_accepted(call->cq, tag, call, do_nothing, NULL, status);
}
grpc_call_error grpc_call_writes_done_old(grpc_call *call, void *tag) {
grpc_ioreq req;
grpc_call_error err;
grpc_cq_begin_op(call->cq, call, GRPC_FINISH_ACCEPTED);
lock(call);
req.op = GRPC_IOREQ_SEND_CLOSE;
err = start_ioreq(call, &req, 1, finish_finish, tag);
unlock(call);
return err;
}
grpc_call_error grpc_call_start_write_status_old(grpc_call *call,
grpc_status_code status,
const char *details,
void *tag) {
grpc_ioreq reqs[3];
grpc_call_error err;
legacy_state *ls;
grpc_cq_begin_op(call->cq, call, GRPC_FINISH_ACCEPTED);
lock(call);
ls = get_legacy_state(call);
reqs[0].op = GRPC_IOREQ_SEND_TRAILING_METADATA;
reqs[0].data.send_metadata.count = ls->md_out_count[ls->md_out_buffer];
reqs[0].data.send_metadata.metadata = ls->md_out[ls->md_out_buffer];
reqs[1].op = GRPC_IOREQ_SEND_STATUS;
reqs[1].data.send_status.code = status;
reqs[1].data.send_status.details = ls->send_details = gpr_strdup(details);
reqs[2].op = GRPC_IOREQ_SEND_CLOSE;
err = start_ioreq(call, reqs, 3, finish_finish, tag);
unlock(call);
return err;
}
|