示例#1
0
文件: call.c 项目: caojiguang/grpc
grpc_call *grpc_call_create(grpc_channel *channel, grpc_completion_queue *cq,
                            const void *server_transport_data,
                            grpc_mdelem **add_initial_metadata,
                            size_t add_initial_metadata_count,
                            gpr_timespec send_deadline) {
  size_t i;
  grpc_transport_op initial_op;
  grpc_transport_op *initial_op_ptr = NULL;
  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->cq = cq;
  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;
  }
  GPR_ASSERT(add_initial_metadata_count < MAX_SEND_INITIAL_METADATA_COUNT);
  for (i = 0; i < add_initial_metadata_count; i++) {
    call->send_initial_metadata[i].md = add_initial_metadata[i];
  }
  call->send_initial_metadata_count = add_initial_metadata_count;
  call->send_deadline = send_deadline;
  grpc_channel_internal_ref(channel);
  call->metadata_context = grpc_channel_get_metadata_context(channel);
  grpc_sopb_init(&call->send_ops);
  grpc_sopb_init(&call->recv_ops);
  gpr_slice_buffer_init(&call->incoming_message);
  /* dropped in destroy */
  gpr_ref_init(&call->internal_refcount, 1);
  /* server hack: start reads immediately so we can get initial metadata.
     TODO(ctiller): figure out a cleaner solution */
  if (!call->is_client) {
    memset(&initial_op, 0, sizeof(initial_op));
    initial_op.recv_ops = &call->recv_ops;
    initial_op.recv_state = &call->recv_state;
    initial_op.on_done_recv = call_on_done_recv;
    initial_op.recv_user_data = call;
    initial_op.context = call->context;
    call->receiving = 1;
    GRPC_CALL_INTERNAL_REF(call, "receiving");
    initial_op_ptr = &initial_op;
  }
  grpc_call_stack_init(channel_stack, server_transport_data, initial_op_ptr,
                       CALL_STACK_FROM_CALL(call));
  if (gpr_time_cmp(send_deadline, gpr_inf_future) != 0) {
    set_deadline_alarm(call, send_deadline);
  }
  return call;
}
示例#2
0
文件: call.c 项目: caojiguang/grpc
static void recv_metadata(grpc_call *call, grpc_metadata_batch *md) {
  grpc_linked_mdelem *l;
  grpc_metadata_array *dest;
  grpc_metadata *mdusr;
  int is_trailing;
  grpc_mdctx *mdctx = call->metadata_context;

  is_trailing = call->read_state >= READ_STATE_GOT_INITIAL_METADATA;
  for (l = md->list.head; l != NULL; l = l->next) {
    grpc_mdelem *md = l->md;
    grpc_mdstr *key = md->key;
    if (key == grpc_channel_get_status_string(call->channel)) {
      set_status_code(call, STATUS_FROM_WIRE, decode_status(md));
    } else if (key == grpc_channel_get_message_string(call->channel)) {
      set_status_details(call, STATUS_FROM_WIRE, grpc_mdstr_ref(md->value));
    } else {
      dest = &call->buffered_metadata[is_trailing];
      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 = grpc_mdstr_as_c_string(md->key);
      mdusr->value = 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;
      l->md = 0;
    }
  }
  if (gpr_time_cmp(md->deadline, gpr_inf_future) != 0) {
    set_deadline_alarm(call, md->deadline);
  }
  if (!is_trailing) {
    call->read_state = READ_STATE_GOT_INITIAL_METADATA;
  }

  grpc_mdctx_lock(mdctx);
  for (l = md->list.head; l; l = l->next) {
    if (l->md) grpc_mdctx_locked_mdelem_unref(mdctx, l->md);
  }
  for (l = md->garbage.head; l; l = l->next) {
    grpc_mdctx_locked_mdelem_unref(mdctx, l->md);
  }
  grpc_mdctx_unlock(mdctx);
}
示例#3
0
文件: call.c 项目: AlexTalks/bazel
grpc_call *grpc_call_create(grpc_channel *channel, grpc_call *parent_call,
                            uint32_t propagation_mask,
                            grpc_completion_queue *cq,
                            const void *server_transport_data,
                            grpc_mdelem **add_initial_metadata,
                            size_t add_initial_metadata_count,
                            gpr_timespec send_deadline) {
  size_t i, j;
  grpc_channel_stack *channel_stack = grpc_channel_get_channel_stack(channel);
  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
  grpc_call *call;
  GPR_TIMER_BEGIN("grpc_call_create", 0);
  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->cq = cq;
  call->parent = parent_call;
  call->is_client = server_transport_data == NULL;
  if (call->is_client) {
    GPR_ASSERT(add_initial_metadata_count < MAX_SEND_EXTRA_METADATA_COUNT);
    for (i = 0; i < add_initial_metadata_count; i++) {
      call->send_extra_metadata[i].md = add_initial_metadata[i];
    }
    call->send_extra_metadata_count = (int)add_initial_metadata_count;
  } else {
    GPR_ASSERT(add_initial_metadata_count == 0);
    call->send_extra_metadata_count = 0;
  }
  for (i = 0; i < 2; i++) {
    for (j = 0; j < 2; j++) {
      call->metadata_batch[i][j].deadline = gpr_inf_future(GPR_CLOCK_MONOTONIC);
    }
  }
  call->send_deadline = send_deadline;
  GRPC_CHANNEL_INTERNAL_REF(channel, "call");
  /* initial refcount dropped by grpc_call_destroy */
  grpc_call_stack_init(&exec_ctx, channel_stack, 1, destroy_call, call,
                       call->context, server_transport_data,
                       CALL_STACK_FROM_CALL(call));
  if (cq != NULL) {
    GRPC_CQ_INTERNAL_REF(cq, "bind");
    grpc_call_stack_set_pollset(&exec_ctx, CALL_STACK_FROM_CALL(call),
                                grpc_cq_pollset(cq));
  }
  if (parent_call != NULL) {
    GRPC_CALL_INTERNAL_REF(parent_call, "child");
    GPR_ASSERT(call->is_client);
    GPR_ASSERT(!parent_call->is_client);

    gpr_mu_lock(&parent_call->mu);

    if (propagation_mask & GRPC_PROPAGATE_DEADLINE) {
      send_deadline = gpr_time_min(
          gpr_convert_clock_type(send_deadline,
                                 parent_call->send_deadline.clock_type),
          parent_call->send_deadline);
    }
    /* for now GRPC_PROPAGATE_TRACING_CONTEXT *MUST* be passed with
     * GRPC_PROPAGATE_STATS_CONTEXT */
    /* TODO(ctiller): This should change to use the appropriate census start_op
     * call. */
    if (propagation_mask & GRPC_PROPAGATE_CENSUS_TRACING_CONTEXT) {
      GPR_ASSERT(propagation_mask & GRPC_PROPAGATE_CENSUS_STATS_CONTEXT);
      grpc_call_context_set(call, GRPC_CONTEXT_TRACING,
                            parent_call->context[GRPC_CONTEXT_TRACING].value,
                            NULL);
    } else {
      GPR_ASSERT(propagation_mask & GRPC_PROPAGATE_CENSUS_STATS_CONTEXT);
    }
    if (propagation_mask & GRPC_PROPAGATE_CANCELLATION) {
      call->cancellation_is_inherited = 1;
    }

    if (parent_call->first_child == NULL) {
      parent_call->first_child = call;
      call->sibling_next = call->sibling_prev = call;
    } else {
      call->sibling_next = parent_call->first_child;
      call->sibling_prev = parent_call->first_child->sibling_prev;
      call->sibling_next->sibling_prev = call->sibling_prev->sibling_next =
          call;
    }

    gpr_mu_unlock(&parent_call->mu);
  }
  if (gpr_time_cmp(send_deadline, gpr_inf_future(send_deadline.clock_type)) !=
      0) {
    set_deadline_alarm(&exec_ctx, call, send_deadline);
  }
  grpc_exec_ctx_finish(&exec_ctx);
  GPR_TIMER_END("grpc_call_create", 0);
  return call;
}
示例#4
0
文件: call.c 项目: robottomw/grpc
static void finish_batch(grpc_exec_ctx *exec_ctx, void *bctlp, int success) {
  batch_control *bctl = bctlp;
  grpc_call *call = bctl->call;
  grpc_call *child_call;
  grpc_call *next_child_call;

  gpr_mu_lock(&call->mu);
  if (bctl->send_initial_metadata) {
    grpc_metadata_batch_destroy(
        &call->metadata_batch[0 /* is_receiving */][0 /* is_trailing */]);
  }
  if (bctl->send_message) {
    call->sending_message = 0;
  }
  if (bctl->send_final_op) {
    grpc_metadata_batch_destroy(
        &call->metadata_batch[0 /* is_receiving */][1 /* is_trailing */]);
  }
  if (bctl->recv_initial_metadata) {
    grpc_metadata_batch *md =
        &call->metadata_batch[1 /* is_receiving */][0 /* is_trailing */];
    grpc_metadata_batch_filter(md, recv_initial_filter, call);

    if (gpr_time_cmp(md->deadline, gpr_inf_future(md->deadline.clock_type)) !=
            0 &&
        !call->is_client) {
      GPR_TIMER_BEGIN("set_deadline_alarm", 0);
      set_deadline_alarm(exec_ctx, call, md->deadline);
      GPR_TIMER_END("set_deadline_alarm", 0);
    }
  }
  if (bctl->recv_final_op) {
    grpc_metadata_batch *md =
        &call->metadata_batch[1 /* is_receiving */][1 /* is_trailing */];
    grpc_metadata_batch_filter(md, recv_trailing_filter, call);

    if (call->have_alarm) {
      grpc_timer_cancel(exec_ctx, &call->alarm);
    }
    /* propagate cancellation to any interested children */
    child_call = call->first_child;
    if (child_call != NULL) {
      do {
        next_child_call = child_call->sibling_next;
        if (child_call->cancellation_is_inherited) {
          GRPC_CALL_INTERNAL_REF(child_call, "propagate_cancel");
          grpc_call_cancel(child_call, NULL);
          GRPC_CALL_INTERNAL_UNREF(exec_ctx, child_call, "propagate_cancel");
        }
        child_call = next_child_call;
      } while (child_call != call->first_child);
    }

    if (call->is_client) {
      get_final_status(call, set_status_value_directly,
                       call->final_op.client.status);
      get_final_details(call, call->final_op.client.status_details,
                        call->final_op.client.status_details_capacity);
    } else {
      get_final_status(call, set_cancelled_value,
                       call->final_op.server.cancelled);
    }

    success = 1;
  }
  bctl->success = success != 0;
  gpr_mu_unlock(&call->mu);
  if (gpr_unref(&bctl->steps_to_complete)) {
    post_batch_completion(exec_ctx, bctl);
  }
}