C++ GPR_TIMER_BEGIN函数代码示例

static grpc_mdelem *recv_common_filter(grpc_call *call, grpc_mdelem *elem) {
  if (elem->key == grpc_channel_get_status_string(call->channel)) {
    GPR_TIMER_BEGIN("status", 0);
    set_status_code(call, STATUS_FROM_WIRE, decode_status(elem));
    GPR_TIMER_END("status", 0);
    return NULL;
  } else if (elem->key == grpc_channel_get_message_string(call->channel)) {
    GPR_TIMER_BEGIN("status-details", 0);
    set_status_details(call, STATUS_FROM_WIRE, GRPC_MDSTR_REF(elem->value));
    GPR_TIMER_END("status-details", 0);
    return NULL;
  }
  return elem;
}

void grpc_call_destroy(grpc_call *c) {
  int cancel;
  grpc_call *parent = c->parent;
  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;

  GPR_TIMER_BEGIN("grpc_call_destroy", 0);
  GRPC_API_TRACE("grpc_call_destroy(c=%p)", 1, (c));

  if (parent) {
    gpr_mu_lock(&parent->mu);
    if (c == parent->first_child) {
      parent->first_child = c->sibling_next;
      if (c == parent->first_child) {
        parent->first_child = NULL;
      }
      c->sibling_prev->sibling_next = c->sibling_next;
      c->sibling_next->sibling_prev = c->sibling_prev;
    }
    gpr_mu_unlock(&parent->mu);
    GRPC_CALL_INTERNAL_UNREF(&exec_ctx, parent, "child");
  }

  gpr_mu_lock(&c->mu);
  GPR_ASSERT(!c->destroy_called);
  c->destroy_called = 1;
  if (c->have_alarm) {
    grpc_timer_cancel(&exec_ctx, &c->alarm);
  }
  cancel = !c->received_final_op;
  gpr_mu_unlock(&c->mu);
  if (cancel) grpc_call_cancel(c, NULL);
  GRPC_CALL_INTERNAL_UNREF(&exec_ctx, c, "destroy");
  grpc_exec_ctx_finish(&exec_ctx);
  GPR_TIMER_END("grpc_call_destroy", 0);
}

static void tcp_handle_write(grpc_exec_ctx *exec_ctx, void *arg /* grpc_tcp */,
                             bool success) {
  grpc_tcp *tcp = (grpc_tcp *)arg;
  flush_result status;
  grpc_closure *cb;

  if (!success) {
    cb = tcp->write_cb;
    tcp->write_cb = NULL;
    cb->cb(exec_ctx, cb->cb_arg, 0);
    TCP_UNREF(exec_ctx, tcp, "write");
    return;
  }

  status = tcp_flush(tcp);
  if (status == FLUSH_PENDING) {
    grpc_fd_notify_on_write(exec_ctx, tcp->em_fd, &tcp->write_closure);
  } else {
    cb = tcp->write_cb;
    tcp->write_cb = NULL;
    GPR_TIMER_BEGIN("tcp_handle_write.cb", 0);
    cb->cb(exec_ctx, cb->cb_arg, status == FLUSH_DONE);
    GPR_TIMER_END("tcp_handle_write.cb", 0);
    TCP_UNREF(exec_ctx, tcp, "write");
  }
}

static void lr_start_transport_stream_op_batch(
    grpc_exec_ctx *exec_ctx, grpc_call_element *elem,
    grpc_transport_stream_op_batch *op) {
  GPR_TIMER_BEGIN("lr_start_transport_stream_op_batch", 0);
  call_data *calld = (call_data *)elem->call_data;

  if (op->recv_initial_metadata) {
    /* substitute our callback for the higher callback */
    calld->recv_initial_metadata =
        op->payload->recv_initial_metadata.recv_initial_metadata;
    calld->ops_recv_initial_metadata_ready =
        op->payload->recv_initial_metadata.recv_initial_metadata_ready;
    op->payload->recv_initial_metadata.recv_initial_metadata_ready =
        &calld->on_initial_md_ready;
  } else if (op->send_trailing_metadata) {
    GRPC_LOG_IF_ERROR(
        "grpc_metadata_batch_filter",
        grpc_metadata_batch_filter(
            exec_ctx,
            op->payload->send_trailing_metadata.send_trailing_metadata,
            lr_trailing_md_filter, elem,
            "LR trailing metadata filtering error"));
  }
  grpc_call_next_op(exec_ctx, elem, op);

  GPR_TIMER_END("lr_start_transport_stream_op_batch", 0);
}

static void on_initial_header(grpc_exec_ctx *exec_ctx, void *tp,
                              grpc_mdelem *md) {
  grpc_chttp2_transport *t = tp;
  grpc_chttp2_stream *s = t->incoming_stream;

  GPR_TIMER_BEGIN("on_initial_header", 0);

  GPR_ASSERT(s != NULL);

  GRPC_CHTTP2_IF_TRACING(gpr_log(
      GPR_INFO, "HTTP:%d:HDR:%s: %s: %s", s->id, t->is_client ? "CLI" : "SVR",
      grpc_mdstr_as_c_string(md->key), grpc_mdstr_as_c_string(md->value)));

  if (md->key == GRPC_MDSTR_GRPC_STATUS && md != GRPC_MDELEM_GRPC_STATUS_0) {
    /* TODO(ctiller): check for a status like " 0" */
    s->seen_error = true;
  }

  if (md->key == GRPC_MDSTR_GRPC_TIMEOUT) {
    gpr_timespec *cached_timeout = grpc_mdelem_get_user_data(md, free_timeout);
    if (!cached_timeout) {
      /* not already parsed: parse it now, and store the result away */
      cached_timeout = gpr_malloc(sizeof(gpr_timespec));
      if (!grpc_http2_decode_timeout(grpc_mdstr_as_c_string(md->value),
                                     cached_timeout)) {
        gpr_log(GPR_ERROR, "Ignoring bad timeout value '%s'",
                grpc_mdstr_as_c_string(md->value));
        *cached_timeout = gpr_inf_future(GPR_TIMESPAN);
      }
      grpc_mdelem_set_user_data(md, free_timeout, cached_timeout);
    }
    grpc_chttp2_incoming_metadata_buffer_set_deadline(
        &s->metadata_buffer[0],
        gpr_time_add(gpr_now(GPR_CLOCK_MONOTONIC), *cached_timeout));
    GRPC_MDELEM_UNREF(md);
  } else {
    const size_t new_size = s->metadata_buffer[0].size + GRPC_MDELEM_LENGTH(md);
    const size_t metadata_size_limit =
        t->settings[GRPC_ACKED_SETTINGS]
                   [GRPC_CHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE];
    if (new_size > metadata_size_limit) {
      gpr_log(GPR_DEBUG,
              "received initial metadata size exceeds limit (%" PRIuPTR
              " vs. %" PRIuPTR ")",
              new_size, metadata_size_limit);
      grpc_chttp2_cancel_stream(
          exec_ctx, t, s,
          grpc_error_set_int(
              GRPC_ERROR_CREATE("received initial metadata size exceeds limit"),
              GRPC_ERROR_INT_GRPC_STATUS, GRPC_STATUS_RESOURCE_EXHAUSTED));
      grpc_chttp2_parsing_become_skip_parser(exec_ctx, t);
      s->seen_error = true;
      GRPC_MDELEM_UNREF(md);
    } else {
      grpc_chttp2_incoming_metadata_buffer_add(&s->metadata_buffer[0], md);
    }
  }

  GPR_TIMER_END("on_initial_header", 0);
}

static void on_trailing_header(void *tp, grpc_mdelem *md) {
  grpc_chttp2_transport_parsing *transport_parsing = tp;
  grpc_chttp2_stream_parsing *stream_parsing =
      transport_parsing->incoming_stream;

  GPR_TIMER_BEGIN("on_trailing_header", 0);

  GPR_ASSERT(stream_parsing);

  GRPC_CHTTP2_IF_TRACING(gpr_log(
      GPR_INFO, "HTTP:%d:TRL:%s: %s: %s", stream_parsing->id,
      transport_parsing->is_client ? "CLI" : "SVR",
      grpc_mdstr_as_c_string(md->key), grpc_mdstr_as_c_string(md->value)));

  if (md->key == GRPC_MDSTR_GRPC_STATUS && md != GRPC_MDELEM_GRPC_STATUS_0) {
    /* TODO(ctiller): check for a status like " 0" */
    stream_parsing->seen_error = 1;
  }

  grpc_chttp2_incoming_metadata_buffer_add(&stream_parsing->metadata_buffer[1],
                                           md);

  grpc_chttp2_list_add_parsing_seen_stream(transport_parsing, stream_parsing);

  GPR_TIMER_END("on_trailing_header", 0);
}

static void grow_shard(slice_shard *shard) {
  size_t capacity = shard->capacity * 2;
  size_t i;
  interned_slice_refcount **strtab;
  interned_slice_refcount *s, *next;

  GPR_TIMER_BEGIN("grow_strtab", 0);

  strtab = (interned_slice_refcount **)gpr_zalloc(
      sizeof(interned_slice_refcount *) * capacity);

  for (i = 0; i < shard->capacity; i++) {
    for (s = shard->strs[i]; s; s = next) {
      size_t idx = TABLE_IDX(s->hash, capacity);
      next = s->bucket_next;
      s->bucket_next = strtab[idx];
      strtab[idx] = s;
    }
  }

  gpr_free(shard->strs);
  shard->strs = strtab;
  shard->capacity = capacity;

  GPR_TIMER_END("grow_strtab", 0);
}

static void destroy_call(grpc_exec_ctx *exec_ctx, void *call, int success) {
  size_t i;
  int ii;
  grpc_call *c = call;
  GPR_TIMER_BEGIN("destroy_call", 0);
  for (i = 0; i < 2; i++) {
    grpc_metadata_batch_destroy(
        &c->metadata_batch[1 /* is_receiving */][i /* is_initial */]);
  }
  if (c->receiving_stream != NULL) {
    grpc_byte_stream_destroy(c->receiving_stream);
  }
  grpc_call_stack_destroy(exec_ctx, CALL_STACK_FROM_CALL(c));
  GRPC_CHANNEL_INTERNAL_UNREF(exec_ctx, c->channel, "call");
  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 (ii = 0; ii < c->send_extra_metadata_count; ii++) {
    GRPC_MDELEM_UNREF(c->send_extra_metadata[ii].md);
  }
  for (i = 0; i < GRPC_CONTEXT_COUNT; i++) {
    if (c->context[i].destroy) {
      c->context[i].destroy(c->context[i].value);
    }
  }
  if (c->cq) {
    GRPC_CQ_INTERNAL_UNREF(c->cq, "bind");
  }
  gpr_free(c);
  GPR_TIMER_END("destroy_call", 0);
}

void grpc_chttp2_prepare_to_read(
    grpc_chttp2_transport_global *transport_global,
    grpc_chttp2_transport_parsing *transport_parsing) {
  grpc_chttp2_stream_global *stream_global;
  grpc_chttp2_stream_parsing *stream_parsing;

  GPR_TIMER_BEGIN("grpc_chttp2_prepare_to_read", 0);

  transport_parsing->next_stream_id = transport_global->next_stream_id;
  memcpy(transport_parsing->last_sent_settings,
         transport_global->settings[GRPC_SENT_SETTINGS],
         sizeof(transport_parsing->last_sent_settings));
  transport_parsing->max_frame_size =
      transport_global->settings[GRPC_ACKED_SETTINGS]
                                [GRPC_CHTTP2_SETTINGS_MAX_FRAME_SIZE];

  /* update the parsing view of incoming window */
  while (grpc_chttp2_list_pop_unannounced_incoming_window_available(
      transport_global, transport_parsing, &stream_global, &stream_parsing)) {
    GRPC_CHTTP2_FLOW_MOVE_STREAM("parse", transport_parsing, stream_parsing,
                                 incoming_window, stream_global,
                                 unannounced_incoming_window_for_parse);
  }

  GPR_TIMER_END("grpc_chttp2_prepare_to_read", 0);
}

static void eventfd_wakeup(grpc_wakeup_fd* fd_info) {
  int err;
  GPR_TIMER_BEGIN("eventfd_wakeup", 0);
  do {
    err = eventfd_write(fd_info->read_fd, 1);
  } while (err < 0 && errno == EINTR);
  GPR_TIMER_END("eventfd_wakeup", 0);
}

int gpr_mu_trylock(gpr_mu* mu) {
  int err;
  GPR_TIMER_BEGIN("gpr_mu_trylock", 0);
  err = pthread_mutex_trylock(mu);
  GPR_ASSERT(err == 0 || err == EBUSY);
  GPR_TIMER_END("gpr_mu_trylock", 0);
  return err == 0;
}

static void step_ping_pong_stream(void) {
  grpc_call_error error;
  GPR_TIMER_BEGIN("ping_pong", 1);
  error = grpc_call_start_batch(call, stream_step_ops, 2, (void *)1, NULL);
  GPR_ASSERT(GRPC_CALL_OK == error);
  grpc_completion_queue_next(cq, gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
  grpc_byte_buffer_destroy(response_payload_recv);
  GPR_TIMER_END("ping_pong", 1);
}

static void hc_start_transport_op(grpc_exec_ctx *exec_ctx,
                                  grpc_call_element *elem,
                                  grpc_transport_stream_op *op) {
  GPR_TIMER_BEGIN("hc_start_transport_op", 0);
  GRPC_CALL_LOG_OP(GPR_INFO, elem, op);
  hc_mutate_op(elem, op);
  GPR_TIMER_END("hc_start_transport_op", 0);
  grpc_call_next_op(exec_ctx, elem, op);
}

static void on_trailing_header(grpc_exec_ctx *exec_ctx, void *tp,
                               grpc_mdelem md) {
  grpc_chttp2_transport *t = (grpc_chttp2_transport *)tp;
  grpc_chttp2_stream *s = t->incoming_stream;

  GPR_TIMER_BEGIN("on_trailing_header", 0);

  GPR_ASSERT(s != NULL);

  if (GRPC_TRACER_ON(grpc_http_trace)) {
    char *key = grpc_slice_to_c_string(GRPC_MDKEY(md));
    char *value =
        grpc_dump_slice(GRPC_MDVALUE(md), GPR_DUMP_HEX | GPR_DUMP_ASCII);
    gpr_log(GPR_INFO, "HTTP:%d:TRL:%s: %s: %s", s->id,
            t->is_client ? "CLI" : "SVR", key, value);
    gpr_free(key);
    gpr_free(value);
  }

  if (grpc_slice_eq(GRPC_MDKEY(md), GRPC_MDSTR_GRPC_STATUS) &&
      !grpc_mdelem_eq(md, GRPC_MDELEM_GRPC_STATUS_0)) {
    /* TODO(ctiller): check for a status like " 0" */
    s->seen_error = true;
  }

  const size_t new_size = s->metadata_buffer[1].size + GRPC_MDELEM_LENGTH(md);
  const size_t metadata_size_limit =
      t->settings[GRPC_ACKED_SETTINGS]
                 [GRPC_CHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE];
  if (new_size > metadata_size_limit) {
    gpr_log(GPR_DEBUG,
            "received trailing metadata size exceeds limit (%" PRIuPTR
            " vs. %" PRIuPTR ")",
            new_size, metadata_size_limit);
    grpc_chttp2_cancel_stream(
        exec_ctx, t, s,
        grpc_error_set_int(GRPC_ERROR_CREATE_FROM_STATIC_STRING(
                               "received trailing metadata size exceeds limit"),
                           GRPC_ERROR_INT_GRPC_STATUS,
                           GRPC_STATUS_RESOURCE_EXHAUSTED));
    grpc_chttp2_parsing_become_skip_parser(exec_ctx, t);
    s->seen_error = true;
    GRPC_MDELEM_UNREF(exec_ctx, md);
  } else {
    grpc_error *error = grpc_chttp2_incoming_metadata_buffer_add(
        exec_ctx, &s->metadata_buffer[1], md);
    if (error != GRPC_ERROR_NONE) {
      grpc_chttp2_cancel_stream(exec_ctx, t, s, error);
      grpc_chttp2_parsing_become_skip_parser(exec_ctx, t);
      s->seen_error = true;
      GRPC_MDELEM_UNREF(exec_ctx, md);
    }
  }

  GPR_TIMER_END("on_trailing_header", 0);
}

static void execute_op(grpc_exec_ctx *exec_ctx, grpc_call *call,
                       grpc_transport_stream_op *op) {
  grpc_call_element *elem;

  GPR_TIMER_BEGIN("execute_op", 0);
  elem = CALL_ELEM_FROM_CALL(call, 0);
  op->context = call->context;
  elem->filter->start_transport_stream_op(exec_ctx, elem, op);
  GPR_TIMER_END("execute_op", 0);
}