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 #include <grpc/support/port_platform.h> 20 21 #include "src/core/lib/surface/channel.h" 22 23 #include <string.h> 24 25 #include <grpc/support/alloc.h> 26 #include <grpc/support/log.h> 27 28 #include "src/core/lib/surface/api_trace.h" 29 #include "src/core/lib/surface/completion_queue.h" 30 31 typedef struct { 32 grpc_closure closure; 33 void* tag; 34 grpc_completion_queue* cq; 35 grpc_cq_completion completion_storage; 36 } ping_result; 37 38 static void ping_destroy(void* arg, grpc_cq_completion* storage) { 39 gpr_free(arg); 40 } 41 42 static void ping_done(void* arg, grpc_error* error) { 43 ping_result* pr = static_cast<ping_result*>(arg); 44 grpc_cq_end_op(pr->cq, pr->tag, GRPC_ERROR_REF(error), ping_destroy, pr, 45 &pr->completion_storage); 46 } 47 48 void grpc_channel_ping(grpc_channel* channel, grpc_completion_queue* cq, 49 void* tag, void* reserved) { 50 GRPC_API_TRACE("grpc_channel_ping(channel=%p, cq=%p, tag=%p, reserved=%p)", 4, 51 (channel, cq, tag, reserved)); 52 grpc_transport_op* op = grpc_make_transport_op(nullptr); 53 ping_result* pr = static_cast<ping_result*>(gpr_malloc(sizeof(*pr))); 54 grpc_channel_element* top_elem = 55 grpc_channel_stack_element(grpc_channel_get_channel_stack(channel), 0); 56 grpc_core::ExecCtx exec_ctx; 57 GPR_ASSERT(reserved == nullptr); 58 pr->tag = tag; 59 pr->cq = cq; 60 GRPC_CLOSURE_INIT(&pr->closure, ping_done, pr, grpc_schedule_on_exec_ctx); 61 op->send_ping.on_ack = &pr->closure; 62 op->bind_pollset = grpc_cq_pollset(cq); 63 GPR_ASSERT(grpc_cq_begin_op(cq, tag)); 64 top_elem->filter->start_transport_op(top_elem, op); 65 } 66
