src/php/ext/grpc/call.c

   1 /*
   2  *
   3  * Copyright 2015 gRPC authors.
   4  *
   5  * Licensed under the Apache License, Version 2.0 (the "License");
   6  * you may not use this file except in compliance with the License.
   7  * You may obtain a copy of the License at
   8  *
   9  *     http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  * Unless required by applicable law or agreed to in writing, software
  12  * distributed under the License is distributed on an "AS IS" BASIS,
  13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14  * See the License for the specific language governing permissions and
  15  * limitations under the License.
  16  *
  17  */
  18
  19 /**
  20  * class Call
  21  * @see https://github.com/grpc/grpc/tree/master/src/php/ext/grpc/call.c
  22  */
  23
  24 #include "call.h"
  25
  26 #include <ext/spl/spl_exceptions.h>
  27 #include <zend_exceptions.h>
  28
  29 #include <grpc/support/alloc.h>
  30
  31 #include "call_credentials.h"
  32 #include "completion_queue.h"
  33 #include "timeval.h"
  34 #include "channel.h"
  35 #include "byte_buffer.h"
  36
  37 zend_class_entry *grpc_ce_call;
  38 PHP_GRPC_DECLARE_OBJECT_HANDLER(call_ce_handlers)
  39
  40 /* Frees and destroys an instance of wrapped_grpc_call */
  41 PHP_GRPC_FREE_WRAPPED_FUNC_START(wrapped_grpc_call)
  42   if (p->owned && p->wrapped != NULL) {
  43     grpc_call_unref(p->wrapped);
  44   }
  45 PHP_GRPC_FREE_WRAPPED_FUNC_END()
  46
  47 /* Initializes an instance of wrapped_grpc_call to be associated with an
  48  * object of a class specified by class_type */
  49 php_grpc_zend_object create_wrapped_grpc_call(zend_class_entry *class_type
  50                                               TSRMLS_DC) {
  51   PHP_GRPC_ALLOC_CLASS_OBJECT(wrapped_grpc_call);
  52   zend_object_std_init(&intern->std, class_type TSRMLS_CC);
  53   object_properties_init(&intern->std, class_type);
  54   PHP_GRPC_FREE_CLASS_OBJECT(wrapped_grpc_call, call_ce_handlers);
  55 }
  56
  57 /* Creates and returns a PHP array object with the data in a
  58  * grpc_metadata_array. Returns NULL on failure */
  59 zval *grpc_parse_metadata_array(grpc_metadata_array
  60                                 *metadata_array TSRMLS_DC) {
  61   int count = metadata_array->count;
  62   grpc_metadata *elements = metadata_array->metadata;
  63   zval *array;
  64   PHP_GRPC_MAKE_STD_ZVAL(array);
  65   array_init(array);
  66   int i;
  67   HashTable *array_hash;
  68   zval *inner_array;
  69   char *str_key;
  70   char *str_val;
  71   size_t key_len;
  72   zval *data = NULL;
  73
  74   array_hash = Z_ARRVAL_P(array);
  75   grpc_metadata *elem;
  76   for (i = 0; i < count; i++) {
  77     elem = &elements[i];
  78     key_len = GRPC_SLICE_LENGTH(elem->key);
  79     str_key = ecalloc(key_len + 1, sizeof(char));
  80     memcpy(str_key, GRPC_SLICE_START_PTR(elem->key), key_len);
  81     str_val = ecalloc(GRPC_SLICE_LENGTH(elem->value) + 1, sizeof(char));
  82     memcpy(str_val, GRPC_SLICE_START_PTR(elem->value),
  83            GRPC_SLICE_LENGTH(elem->value));
  84     if (php_grpc_zend_hash_find(array_hash, str_key, key_len, (void **)&data)
  85         == SUCCESS) {
  86       if (Z_TYPE_P(data) != IS_ARRAY) {
  87         zend_throw_exception(zend_exception_get_default(TSRMLS_C),
  88                              "Metadata hash somehow contains wrong types.",
  89                              1 TSRMLS_CC);
  90         efree(str_key);
  91         efree(str_val);
  92         PHP_GRPC_FREE_STD_ZVAL(array);
  93         return NULL;
  94       }
  95       php_grpc_add_next_index_stringl(data, str_val,
  96                                       GRPC_SLICE_LENGTH(elem->value),
  97                                       false);
  98     } else {
  99       PHP_GRPC_MAKE_STD_ZVAL(inner_array);
 100       array_init(inner_array);
 101       php_grpc_add_next_index_stringl(inner_array, str_val,
 102                                       GRPC_SLICE_LENGTH(elem->value), false);
 103       add_assoc_zval(array, str_key, inner_array);
 104       PHP_GRPC_FREE_STD_ZVAL(inner_array);
 105     }
 106     efree(str_key);
 107     efree(str_val);
 108   }
 109   return array;
 110 }
 111
 112 /* Populates a grpc_metadata_array with the data in a PHP array object.
 113    Returns true on success and false on failure */
 114 bool create_metadata_array(zval *array, grpc_metadata_array *metadata) {
 115   HashTable *array_hash;
 116   HashTable *inner_array_hash;
 117   zval *value;
 118   zval *inner_array;
 119   grpc_metadata_array_init(metadata);
 120   metadata->count = 0;
 121   metadata->metadata = NULL;
 122   if (Z_TYPE_P(array) != IS_ARRAY) {
 123     return false;
 124   }
 125   array_hash = Z_ARRVAL_P(array);
 126
 127   char *key;
 128   int key_type;
 129   PHP_GRPC_HASH_FOREACH_STR_KEY_VAL_START(array_hash, key, key_type,
 130                                           inner_array)
 131     if (key_type != HASH_KEY_IS_STRING || key == NULL) {
 132       return false;
 133     }
 134     if (Z_TYPE_P(inner_array) != IS_ARRAY) {
 135       return false;
 136     }
 137     inner_array_hash = Z_ARRVAL_P(inner_array);
 138     metadata->capacity += zend_hash_num_elements(inner_array_hash);
 139   PHP_GRPC_HASH_FOREACH_END()
 140
 141   metadata->metadata = gpr_malloc(metadata->capacity * sizeof(grpc_metadata));
 142
 143   char *key1 = NULL;
 144   int key_type1;
 145   PHP_GRPC_HASH_FOREACH_STR_KEY_VAL_START(array_hash, key1, key_type1,
 146                                           inner_array)
 147     if (key_type1 != HASH_KEY_IS_STRING) {
 148       return false;
 149     }
 150     if (!grpc_header_key_is_legal(grpc_slice_from_static_string(key1))) {
 151       return false;
 152     }
 153     inner_array_hash = Z_ARRVAL_P(inner_array);
 154     PHP_GRPC_HASH_FOREACH_VAL_START(inner_array_hash, value)
 155       if (Z_TYPE_P(value) != IS_STRING) {
 156         return false;
 157       }
 158       metadata->metadata[metadata->count].key =
 159         grpc_slice_from_copied_string(key1);
 160       metadata->metadata[metadata->count].value =
 161         grpc_slice_from_copied_buffer(Z_STRVAL_P(value), Z_STRLEN_P(value));
 162       metadata->count += 1;
 163     PHP_GRPC_HASH_FOREACH_END()
 164   PHP_GRPC_HASH_FOREACH_END()
 165   return true;
 166 }
 167
 168 void grpc_php_metadata_array_destroy_including_entries(
 169     grpc_metadata_array* array) {
 170   size_t i;
 171   if (array->metadata) {
 172     for (i = 0; i < array->count; i++) {
 173       grpc_slice_unref(array->metadata[i].key);
 174       grpc_slice_unref(array->metadata[i].value);
 175     }
 176   }
 177   grpc_metadata_array_destroy(array);
 178 }
 179
 180 /* Wraps a grpc_call struct in a PHP object. Owned indicates whether the
 181    struct should be destroyed at the end of the object's lifecycle */
 182 zval *grpc_php_wrap_call(grpc_call *wrapped, bool owned TSRMLS_DC) {
 183   zval *call_object;
 184   PHP_GRPC_MAKE_STD_ZVAL(call_object);
 185   object_init_ex(call_object, grpc_ce_call);
 186   wrapped_grpc_call *call = PHP_GRPC_GET_WRAPPED_OBJECT(wrapped_grpc_call,
 187                                                         call_object);
 188   call->wrapped = wrapped;
 189   call->owned = owned;
 190   return call_object;
 191 }
 192
 193 /**
 194  * Constructs a new instance of the Call class.
 195  * @param Channel $channel_obj The channel to associate the call with.
 196  *                             Must not be closed.
 197  * @param string $method The method to call
 198  * @param Timeval $deadline_obj The deadline for completing the call
 199  * @param string $host_override = "" The host is set by user (optional)
 200  */
 201 PHP_METHOD(Call, __construct) {
 202   zval *channel_obj;
 203   char *method;
 204   php_grpc_int method_len;
 205   zval *deadline_obj;
 206   char *host_override = NULL;
 207   php_grpc_int host_override_len = 0;
 208   wrapped_grpc_call *call = PHP_GRPC_GET_WRAPPED_OBJECT(wrapped_grpc_call,
 209                                                         getThis());
 210
 211   /* "OsO|s" == 1 Object, 1 string, 1 Object, 1 optional string */
 212   if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "OsO|s", &channel_obj,
 213                             grpc_ce_channel, &method, &method_len,
 214                             &deadline_obj, grpc_ce_timeval, &host_override,
 215                             &host_override_len) == FAILURE) {
 216     zend_throw_exception(spl_ce_InvalidArgumentException,
 217                          "Call expects a Channel, a String, a Timeval and "
 218                          "an optional String", 1 TSRMLS_CC);
 219     return;
 220   }
 221   wrapped_grpc_channel *channel =
 222     PHP_GRPC_GET_WRAPPED_OBJECT(wrapped_grpc_channel, channel_obj);
 223   if (channel->wrapper == NULL) {
 224     zend_throw_exception(spl_ce_InvalidArgumentException,
 225                          "Call cannot be constructed from a closed Channel",
 226                          1 TSRMLS_CC);
 227     return;
 228   }
 229   gpr_mu_lock(&channel->wrapper->mu);
 230   if (channel->wrapper == NULL || channel->wrapper->wrapped == NULL) {
 231     zend_throw_exception(spl_ce_InvalidArgumentException,
 232                          "Call cannot be constructed from a closed Channel",
 233                          1 TSRMLS_CC);
 234     gpr_mu_unlock(&channel->wrapper->mu);
 235     return;
 236   }
 237   add_property_zval(getThis(), "channel", channel_obj);
 238   wrapped_grpc_timeval *deadline =
 239     PHP_GRPC_GET_WRAPPED_OBJECT(wrapped_grpc_timeval, deadline_obj);
 240   grpc_slice method_slice = grpc_slice_from_copied_string(method);
 241   grpc_slice host_slice = host_override != NULL ?
 242       grpc_slice_from_copied_string(host_override) : grpc_empty_slice();
 243   call->wrapped =
 244     grpc_channel_create_call(channel->wrapper->wrapped, NULL,
 245                              GRPC_PROPAGATE_DEFAULTS,
 246                              completion_queue, method_slice,
 247                              host_override != NULL ? &host_slice : NULL,
 248                              deadline->wrapped, NULL);
 249   grpc_slice_unref(method_slice);
 250   grpc_slice_unref(host_slice);
 251   call->owned = true;
 252   call->channel = channel;
 253   gpr_mu_unlock(&channel->wrapper->mu);
 254 }
 255
 256 /**
 257  * Start a batch of RPC actions.
 258  * @param array $array Array of actions to take
 259  * @return object Object with results of all actions
 260  */
 261 PHP_METHOD(Call, startBatch) {
 262   zval *result;
 263   PHP_GRPC_MAKE_STD_ZVAL(result);
 264   object_init(result);
 265   php_grpc_ulong index;
 266   zval *recv_status;
 267   zval *value;
 268   zval *inner_value;
 269   zval *message_value;
 270   zval *message_flags;
 271   wrapped_grpc_call *call = PHP_GRPC_GET_WRAPPED_OBJECT(wrapped_grpc_call,
 272                                                         getThis());
 273   if (call->channel) {
 274     // startBatch in gRPC PHP server doesn't have channel in it.
 275     if (call->channel->wrapper == NULL ||
 276         call->channel->wrapper->wrapped == NULL) {
 277       zend_throw_exception(spl_ce_RuntimeException,
 278                            "startBatch Error. Channel is closed",
 279                            1 TSRMLS_CC);
 280     }
 281   }
 282
 283   grpc_op ops[8];
 284   size_t op_num = 0;
 285   zval *array;
 286   HashTable *array_hash;
 287   HashTable *status_hash;
 288   HashTable *message_hash;
 289
 290   grpc_metadata_array metadata;
 291   grpc_metadata_array trailing_metadata;
 292   grpc_metadata_array recv_metadata;
 293   grpc_metadata_array recv_trailing_metadata;
 294   grpc_status_code status;
 295   grpc_slice recv_status_details = grpc_empty_slice();
 296   grpc_slice send_status_details = grpc_empty_slice();
 297   grpc_byte_buffer *message = NULL;
 298   int cancelled;
 299   grpc_call_error error;
 300
 301   zend_string* zmessage = NULL;
 302
 303   grpc_metadata_array_init(&metadata);
 304   grpc_metadata_array_init(&trailing_metadata);
 305   grpc_metadata_array_init(&recv_metadata);
 306   grpc_metadata_array_init(&recv_trailing_metadata);
 307   memset(ops, 0, sizeof(ops));
 308
 309   /* "a" == 1 array */
 310   if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "a", &array) ==
 311       FAILURE) {
 312     zend_throw_exception(spl_ce_InvalidArgumentException,
 313                          "start_batch expects an array", 1 TSRMLS_CC);
 314     goto cleanup;
 315   }
 316
 317   // c-core may call rand(). If we don't call srand() here, all the
 318   // random numbers being returned would be the same.
 319   gpr_timespec now = gpr_now(GPR_CLOCK_REALTIME);
 320   srand(now.tv_nsec);
 321
 322   array_hash = Z_ARRVAL_P(array);
 323
 324   char *key = NULL;
 325   int key_type;
 326   PHP_GRPC_HASH_FOREACH_LONG_KEY_VAL_START(array_hash, key, key_type, index,
 327                                            value)
 328     if (key_type != HASH_KEY_IS_LONG || key != NULL) {
 329       zend_throw_exception(spl_ce_InvalidArgumentException,
 330                            "batch keys must be integers", 1 TSRMLS_CC);
 331       goto cleanup;
 332     }
 333
 334     ops[op_num].op = (grpc_op_type)index;
 335     ops[op_num].flags = 0;
 336     ops[op_num].reserved = NULL;
 337
 338     switch(index) {
 339     case GRPC_OP_SEND_INITIAL_METADATA:
 340       if (!create_metadata_array(value, &metadata)) {
 341         zend_throw_exception(spl_ce_InvalidArgumentException,
 342                              "Bad metadata value given", 1 TSRMLS_CC);
 343         goto cleanup;
 344       }
 345       ops[op_num].data.send_initial_metadata.count = metadata.count;
 346       ops[op_num].data.send_initial_metadata.metadata = metadata.metadata;
 347       break;
 348     case GRPC_OP_SEND_MESSAGE:
 349       if (Z_TYPE_P(value) != IS_ARRAY) {
 350         zend_throw_exception(spl_ce_InvalidArgumentException,
 351                              "Expected an array for send message",
 352                              1 TSRMLS_CC);
 353         goto cleanup;
 354       }
 355       message_hash = Z_ARRVAL_P(value);
 356       if (php_grpc_zend_hash_find(message_hash, "flags", sizeof("flags"),
 357                          (void **)&message_flags) == SUCCESS) {
 358         if (Z_TYPE_P(message_flags) != IS_LONG) {
 359           zend_throw_exception(spl_ce_InvalidArgumentException,
 360                                "Expected an int for message flags",
 361                                1 TSRMLS_CC);
 362         }
 363         ops[op_num].flags = Z_LVAL_P(message_flags) & GRPC_WRITE_USED_MASK;
 364       }
 365       if (php_grpc_zend_hash_find(message_hash, "message", sizeof("message"),
 366                          (void **)&message_value) != SUCCESS ||
 367           Z_TYPE_P(message_value) != IS_STRING) {
 368         zend_throw_exception(spl_ce_InvalidArgumentException,
 369                              "Expected a string for send message",
 370                              1 TSRMLS_CC);
 371         goto cleanup;
 372       }
 373       ops[op_num].data.send_message.send_message =
 374           string_to_byte_buffer(Z_STRVAL_P(message_value),
 375                                 Z_STRLEN_P(message_value));
 376       break;
 377     case GRPC_OP_SEND_CLOSE_FROM_CLIENT:
 378       break;
 379     case GRPC_OP_SEND_STATUS_FROM_SERVER:
 380       status_hash = Z_ARRVAL_P(value);
 381       if (php_grpc_zend_hash_find(status_hash, "metadata", sizeof("metadata"),
 382                          (void **)&inner_value) == SUCCESS) {
 383         if (!create_metadata_array(inner_value, &trailing_metadata)) {
 384           zend_throw_exception(spl_ce_InvalidArgumentException,
 385                                "Bad trailing metadata value given",
 386                                1 TSRMLS_CC);
 387           goto cleanup;
 388         }
 389         ops[op_num].data.send_status_from_server.trailing_metadata =
 390             trailing_metadata.metadata;
 391         ops[op_num].data.send_status_from_server.trailing_metadata_count =
 392             trailing_metadata.count;
 393       }
 394       if (php_grpc_zend_hash_find(status_hash, "code", sizeof("code"),
 395                          (void**)&inner_value) == SUCCESS) {
 396         if (Z_TYPE_P(inner_value) != IS_LONG) {
 397           zend_throw_exception(spl_ce_InvalidArgumentException,
 398                                "Status code must be an integer",
 399                                1 TSRMLS_CC);
 400           goto cleanup;
 401         }
 402         ops[op_num].data.send_status_from_server.status =
 403             Z_LVAL_P(inner_value);
 404       } else {
 405         zend_throw_exception(spl_ce_InvalidArgumentException,
 406                              "Integer status code is required",
 407                              1 TSRMLS_CC);
 408         goto cleanup;
 409       }
 410       if (php_grpc_zend_hash_find(status_hash, "details", sizeof("details"),
 411                          (void**)&inner_value) == SUCCESS) {
 412         if (Z_TYPE_P(inner_value) != IS_STRING) {
 413           zend_throw_exception(spl_ce_InvalidArgumentException,
 414                                "Status details must be a string",
 415                                1 TSRMLS_CC);
 416           goto cleanup;
 417         }
 418         send_status_details = grpc_slice_from_copied_string(
 419           Z_STRVAL_P(inner_value));
 420         ops[op_num].data.send_status_from_server.status_details =
 421           &send_status_details;
 422       } else {
 423         zend_throw_exception(spl_ce_InvalidArgumentException,
 424                              "String status details is required",
 425                              1 TSRMLS_CC);
 426         goto cleanup;
 427       }
 428       break;
 429     case GRPC_OP_RECV_INITIAL_METADATA:
 430       ops[op_num].data.recv_initial_metadata.recv_initial_metadata =
 431           &recv_metadata;
 432       break;
 433     case GRPC_OP_RECV_MESSAGE:
 434       ops[op_num].data.recv_message.recv_message = &message;
 435       break;
 436     case GRPC_OP_RECV_STATUS_ON_CLIENT:
 437       ops[op_num].data.recv_status_on_client.trailing_metadata =
 438           &recv_trailing_metadata;
 439       ops[op_num].data.recv_status_on_client.status = &status;
 440       ops[op_num].data.recv_status_on_client.status_details =
 441           &recv_status_details;
 442       break;
 443     case GRPC_OP_RECV_CLOSE_ON_SERVER:
 444       ops[op_num].data.recv_close_on_server.cancelled = &cancelled;
 445       break;
 446     default:
 447       zend_throw_exception(spl_ce_InvalidArgumentException,
 448                            "Unrecognized key in batch", 1 TSRMLS_CC);
 449       goto cleanup;
 450     }
 451     op_num++;
 452   PHP_GRPC_HASH_FOREACH_END()
 453
 454   error = grpc_call_start_batch(call->wrapped, ops, op_num, call->wrapped,
 455                                 NULL);
 456   if (error != GRPC_CALL_OK) {
 457     zend_throw_exception(spl_ce_LogicException,
 458                          "start_batch was called incorrectly",
 459                          (long)error TSRMLS_CC);
 460     goto cleanup;
 461   }
 462   grpc_completion_queue_pluck(completion_queue, call->wrapped,
 463                               gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
 464   zval *recv_md;
 465   for (int i = 0; i < op_num; i++) {
 466     switch(ops[i].op) {
 467     case GRPC_OP_SEND_INITIAL_METADATA:
 468       add_property_bool(result, "send_metadata", true);
 469       break;
 470     case GRPC_OP_SEND_MESSAGE:
 471       add_property_bool(result, "send_message", true);
 472       break;
 473     case GRPC_OP_SEND_CLOSE_FROM_CLIENT:
 474       add_property_bool(result, "send_close", true);
 475       break;
 476     case GRPC_OP_SEND_STATUS_FROM_SERVER:
 477       add_property_bool(result, "send_status", true);
 478       break;
 479     case GRPC_OP_RECV_INITIAL_METADATA:
 480       recv_md = grpc_parse_metadata_array(&recv_metadata);
 481       add_property_zval(result, "metadata", recv_md);
 482       zval_ptr_dtor(recv_md);
 483       PHP_GRPC_FREE_STD_ZVAL(recv_md);
 484       PHP_GRPC_DELREF(array);
 485       break;
 486     case GRPC_OP_RECV_MESSAGE:
 487       zmessage = byte_buffer_to_zend_string(message);
 488
 489       if (zmessage == NULL) {
 490         add_property_null(result, "message");
 491       } else {
 492         zval zmessage_val;
 493         ZVAL_NEW_STR(&zmessage_val, zmessage);
 494         add_property_zval(result, "message", &zmessage_val);
 495         zval_ptr_dtor(&zmessage_val);
 496       }
 497       break;
 498     case GRPC_OP_RECV_STATUS_ON_CLIENT:
 499       PHP_GRPC_MAKE_STD_ZVAL(recv_status);
 500       object_init(recv_status);
 501       recv_md = grpc_parse_metadata_array(&recv_trailing_metadata);
 502       add_property_zval(recv_status, "metadata", recv_md);
 503       zval_ptr_dtor(recv_md);
 504       PHP_GRPC_FREE_STD_ZVAL(recv_md);
 505       PHP_GRPC_DELREF(array);
 506       add_property_long(recv_status, "code", status);
 507       char *status_details_text = grpc_slice_to_c_string(recv_status_details);
 508       php_grpc_add_property_string(recv_status, "details", status_details_text,
 509                                    true);
 510       gpr_free(status_details_text);
 511       add_property_zval(result, "status", recv_status);
 512       zval_ptr_dtor(recv_status);
 513       PHP_GRPC_DELREF(recv_status);
 514       PHP_GRPC_FREE_STD_ZVAL(recv_status);
 515       break;
 516     case GRPC_OP_RECV_CLOSE_ON_SERVER:
 517       add_property_bool(result, "cancelled", cancelled);
 518       break;
 519     default:
 520       break;
 521     }
 522   }
 523
 524 cleanup:
 525   grpc_php_metadata_array_destroy_including_entries(&metadata);
 526   grpc_php_metadata_array_destroy_including_entries(&trailing_metadata);
 527   grpc_metadata_array_destroy(&recv_metadata);
 528   grpc_metadata_array_destroy(&recv_trailing_metadata);
 529   grpc_slice_unref(recv_status_details);
 530   grpc_slice_unref(send_status_details);
 531   for (int i = 0; i < op_num; i++) {
 532     if (ops[i].op == GRPC_OP_SEND_MESSAGE) {
 533       grpc_byte_buffer_destroy(ops[i].data.send_message.send_message);
 534     }
 535     if (ops[i].op == GRPC_OP_RECV_MESSAGE) {
 536       grpc_byte_buffer_destroy(message);
 537     }
 538   }
 539   RETURN_DESTROY_ZVAL(result);
 540 }
 541
 542 /**
 543  * Get the endpoint this call/stream is connected to
 544  * @return string The URI of the endpoint
 545  */
 546 PHP_METHOD(Call, getPeer) {
 547   wrapped_grpc_call *call = PHP_GRPC_GET_WRAPPED_OBJECT(wrapped_grpc_call,
 548                                                         getThis());
 549   char *peer = grpc_call_get_peer(call->wrapped);
 550   PHP_GRPC_RETVAL_STRING(peer, 1);
 551   gpr_free(peer);
 552 }
 553
 554 /**
 555  * Cancel the call. This will cause the call to end with STATUS_CANCELLED
 556  * if it has not already ended with another status.
 557  * @return void
 558  */
 559 PHP_METHOD(Call, cancel) {
 560   wrapped_grpc_call *call = PHP_GRPC_GET_WRAPPED_OBJECT(wrapped_grpc_call,
 561                                                         getThis());
 562   grpc_call_cancel(call->wrapped, NULL);
 563 }
 564
 565 /**
 566  * Set the CallCredentials for this call.
 567  * @param CallCredentials $creds_obj The CallCredentials object
 568  * @return int The error code
 569  */
 570 PHP_METHOD(Call, setCredentials) {
 571   zval *creds_obj;
 572
 573   /* "O" == 1 Object */
 574   if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "O", &creds_obj,
 575                             grpc_ce_call_credentials) == FAILURE) {
 576     zend_throw_exception(spl_ce_InvalidArgumentException,
 577                          "setCredentials expects 1 CallCredentials",
 578                          1 TSRMLS_CC);
 579     return;
 580   }
 581
 582   wrapped_grpc_call_credentials *creds =
 583     PHP_GRPC_GET_WRAPPED_OBJECT(wrapped_grpc_call_credentials, creds_obj);
 584   wrapped_grpc_call *call = PHP_GRPC_GET_WRAPPED_OBJECT(wrapped_grpc_call,
 585                                                         getThis());
 586
 587   grpc_call_error error = GRPC_CALL_ERROR;
 588   error = grpc_call_set_credentials(call->wrapped, creds->wrapped);
 589   RETURN_LONG(error);
 590 }
 591
 592 ZEND_BEGIN_ARG_INFO_EX(arginfo_construct, 0, 0, 3)
 593   ZEND_ARG_INFO(0, channel)
 594   ZEND_ARG_INFO(0, method)
 595   ZEND_ARG_INFO(0, deadline)
 596   ZEND_ARG_INFO(0, host_override)
 597 ZEND_END_ARG_INFO()
 598
 599 ZEND_BEGIN_ARG_INFO_EX(arginfo_startBatch, 0, 0, 1)
 600   ZEND_ARG_INFO(0, ops)
 601 ZEND_END_ARG_INFO()
 602
 603 ZEND_BEGIN_ARG_INFO_EX(arginfo_getPeer, 0, 0, 0)
 604 ZEND_END_ARG_INFO()
 605
 606 ZEND_BEGIN_ARG_INFO_EX(arginfo_cancel, 0, 0, 0)
 607 ZEND_END_ARG_INFO()
 608
 609 ZEND_BEGIN_ARG_INFO_EX(arginfo_setCredentials, 0, 0, 1)
 610   ZEND_ARG_INFO(0, credentials)
 611 ZEND_END_ARG_INFO()
 612
 613 static zend_function_entry call_methods[] = {
 614   PHP_ME(Call, __construct, arginfo_construct, ZEND_ACC_PUBLIC | ZEND_ACC_CTOR)
 615   PHP_ME(Call, startBatch, arginfo_startBatch, ZEND_ACC_PUBLIC)
 616   PHP_ME(Call, getPeer, arginfo_getPeer, ZEND_ACC_PUBLIC)
 617   PHP_ME(Call, cancel, arginfo_cancel, ZEND_ACC_PUBLIC)
 618   PHP_ME(Call, setCredentials, arginfo_setCredentials, ZEND_ACC_PUBLIC)
 619   PHP_FE_END
 620 };
 621
 622 void grpc_init_call(TSRMLS_D) {
 623   zend_class_entry ce;
 624   INIT_CLASS_ENTRY(ce, "Grpc\\Call", call_methods);
 625   ce.create_object = create_wrapped_grpc_call;
 626   grpc_ce_call = zend_register_internal_class(&ce TSRMLS_CC);
 627   PHP_GRPC_INIT_HANDLER(wrapped_grpc_call, call_ce_handlers);
 628 }