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/*
*
* Copyright 2015 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include "src/core/lib/surface/channel.h"
#include <string.h>
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include "src/core/lib/surface/api_trace.h"
#include "src/core/lib/surface/completion_queue.h"
typedef struct {
grpc_closure closure;
void *tag;
grpc_completion_queue *cq;
grpc_cq_completion completion_storage;
} ping_result;
static void ping_destroy(grpc_exec_ctx *exec_ctx, void *arg,
grpc_cq_completion *storage) {
gpr_free(arg);
}
static void ping_done(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
ping_result *pr = (ping_result *)arg;
grpc_cq_end_op(exec_ctx, pr->cq, pr->tag, GRPC_ERROR_REF(error), ping_destroy,
pr, &pr->completion_storage);
}
void grpc_channel_ping(grpc_channel *channel, grpc_completion_queue *cq,
void *tag, void *reserved) {
GRPC_API_TRACE("grpc_channel_ping(channel=%p, cq=%p, tag=%p, reserved=%p)", 4,
(channel, cq, tag, reserved));
grpc_transport_op *op = grpc_make_transport_op(NULL);
ping_result *pr = (ping_result *)gpr_malloc(sizeof(*pr));
grpc_channel_element *top_elem =
grpc_channel_stack_element(grpc_channel_get_channel_stack(channel), 0);
grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
GPR_ASSERT(reserved == NULL);
pr->tag = tag;
pr->cq = cq;
GRPC_CLOSURE_INIT(&pr->closure, ping_done, pr, grpc_schedule_on_exec_ctx);
op->send_ping = &pr->closure;
op->bind_pollset = grpc_cq_pollset(cq);
GPR_ASSERT(grpc_cq_begin_op(cq, tag));
top_elem->filter->start_transport_op(&exec_ctx, top_elem, op);
grpc_exec_ctx_finish(&exec_ctx);
}
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