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/*
* Copyright (c) 2017 Cisco and/or its affiliates.
* 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 <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <LongBow/runtime.h>
#include <parc/algol/parc_Memory.h>
#include "transport.h"
#include "transport_private.h"
#include "rta_Transport.h"
struct transport_context {
TransportTypes transport_type;
struct transport_operations ops;
void *transport_data;
unsigned references;
};
// the one global transport, for now
static TransportContext *the_context = NULL;
TransportContext *
Transport_Create(TransportTypes type)
{
if (the_context == NULL) {
switch (type) {
case TRANSPORT_RTA:
the_context = parcMemory_Allocate(sizeof(TransportContext));
assertNotNull(the_context, "TransportContext could not be allocated, parcMemory_Allocate(%zu) returned NULL", sizeof(TransportContext));
the_context->references = 0;
the_context->ops = rta_ops;
the_context->transport_data = the_context->ops.Create();
the_context->transport_type = type;
break;
default:
fprintf(stderr, "%s unknown transport type %d\n", __func__, type);
abort();
break;
}
}
if (the_context->transport_type == type) {
the_context->references++;
return the_context;
}
fprintf(stderr, "%s transport type %d not of request type %d\n",
__func__, the_context->transport_type, type);
abort();
}
int
Transport_Open(CCNxTransportConfig *transportConfig)
{
assertNotNull(the_context, "The TransportContext is NULL.");
assertNotNull(transportConfig, "The parameter transportConfig must be a non-null CCNxTransportConfig pointer");
return the_context->ops.Open(the_context->transport_data, transportConfig);
}
int
Transport_Send(int desc, CCNxMetaMessage *msg_in)
{
assertNotNull(the_context, "the_context is null");
return the_context->ops.Send(the_context->transport_data, desc, msg_in, CCNxStackTimeout_Never);
}
TransportIOStatus
Transport_Recv(int desc, CCNxMetaMessage **msg_out)
{
return the_context->ops.Recv(the_context->transport_data, desc, msg_out, CCNxStackTimeout_Never);
}
int
Transport_Close(int desc)
{
return the_context->ops.Close(the_context->transport_data, desc);
}
int
Transport_PassCommand(void *stackCommand)
{
return the_context->ops.PassCommand(the_context->transport_data, stackCommand);
}
void
Transport_Destroy(TransportContext **ctxPtr)
{
assertNotNull(ctxPtr, "Transport_Destroy called with null context");
assertNotNull(*ctxPtr, "Transport_Destroy callled with reference to null");
TransportContext *ctx = *ctxPtr;
assertTrue(the_context == ctx, "Passed ctx is not the same");
assertTrue(ctx->references > 0, "Invalid reference count");
ctx->references--;
if (ctx->references == 0) {
ctx->ops.Destroy(&ctx->transport_data);
memset(ctx, 0, sizeof(TransportContext));
parcMemory_Deallocate((void **) &ctx);
ctx = NULL;
the_context = NULL;
}
}
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