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-rw-r--r--hicn-light/src/core/connectionTable.c226
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diff --git a/hicn-light/src/core/connectionTable.c b/hicn-light/src/core/connectionTable.c
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-/*
- * Copyright (c) 2017-2019 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.
- */
-
-/**
- * @header ConnectionTable
- * @abstract Records all the current connections and references to them
- * @discussion
- *
- */
-
-#ifndef _WIN32
-#include <unistd.h>
-#endif
-#include <src/config.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include <parc/assert/parc_Assert.h>
-
-#include <parc/algol/parc_ArrayList.h>
-#include <parc/algol/parc_Hash.h>
-#include <parc/algol/parc_HashCodeTable.h>
-#include <parc/algol/parc_Memory.h>
-#include <parc/algol/parc_TreeRedBlack.h>
-#include <src/core/connectionTable.h>
-#include <src/io/addressPair.h>
-
-struct connection_table {
- // The main storage table that has a Destroy method.
- // The key is an unsigned int pointer. We use an unsigned int pointer
- // because we want to be able to lookup by the id alone, and not have to
- // have the IoOperations everywhere.
- PARCHashCodeTable *storageTableById;
-
- // The key is a AddressPair
- // It does not have a destroy method for the data or key,
- // as they are derived from the storage table.
- PARCHashCodeTable *indexByAddressPair;
-
- // An iterable stucture organized by connection id. The keys and
- // values are the same pointers as in storageTableById, so there
- // are no destructors in the tree.
- // The only reason to keep this tree is so we have an iterable list
- // of connections, which the hash table does not give us.
- PARCTreeRedBlack *listById;
-};
-
-static bool connectionTable_ConnectionIdEquals(const void *keyA,
- const void *keyB) {
- unsigned idA = *((unsigned *)keyA);
- unsigned idB = *((unsigned *)keyB);
- return (idA == idB);
-}
-
-static int connectionTable_ConnectionIdCompare(const void *keyA,
- const void *keyB) {
- unsigned idA = *((unsigned *)keyA);
- unsigned idB = *((unsigned *)keyB);
- if (idA < idB) {
- return -1;
- }
- if (idA > idB) {
- return +1;
- }
- return 0;
-}
-
-static bool connectionTable_AddressPairEquals(const void *keyA,
- const void *keyB) {
- const AddressPair *pairA = (const AddressPair *)keyA;
- const AddressPair *pairB = (const AddressPair *)keyB;
-
- return addressPair_Equals(pairA, pairB);
-}
-
-static HashCodeType connectionTable_ConnectionIdHashCode(const void *keyA) {
- unsigned idA = *((unsigned *)keyA);
- return parcHash32_Int32(idA);
-}
-
-static HashCodeType connectionTable_AddressPairHashCode(const void *keyA) {
- const AddressPair *pairA = (const AddressPair *)keyA;
- return addressPair_HashCode(pairA);
-}
-
-static void connectionTable_ConnectionIdDestroyer(void **dataPtr) {
- unsigned *idA = (unsigned *)*dataPtr;
- parcMemory_Deallocate((void **)&idA);
- *dataPtr = NULL;
-}
-
-static void connectionTable_ConnectionDestroyer(void **dataPtr) {
- connection_Release((Connection **)dataPtr);
-}
-
-ConnectionTable *connectionTable_Create() {
- size_t initialSize = 16384;
-
- ConnectionTable *conntable =
- parcMemory_AllocateAndClear(sizeof(ConnectionTable));
- parcAssertNotNull(conntable, "parcMemory_AllocateAndClear(%zu) returned NULL",
- sizeof(ConnectionTable));
-
- conntable->storageTableById = parcHashCodeTable_Create_Size(
- connectionTable_ConnectionIdEquals, connectionTable_ConnectionIdHashCode,
- connectionTable_ConnectionIdDestroyer,
- connectionTable_ConnectionDestroyer, initialSize);
-
- // no key or data destroyer, this is an index into storageByid.
- conntable->indexByAddressPair = parcHashCodeTable_Create_Size(
- connectionTable_AddressPairEquals, connectionTable_AddressPairHashCode,
- NULL, NULL, initialSize);
-
- conntable->listById =
- parcTreeRedBlack_Create(connectionTable_ConnectionIdCompare,
- NULL, // key free
- NULL, // key copy
- NULL, // value equals
- NULL, // value free
- NULL); // value copy
-
- return conntable;
-}
-
-void connectionTable_Destroy(ConnectionTable **conntablePtr) {
- parcAssertNotNull(conntablePtr, "Parameter must be non-null double pointer");
- parcAssertNotNull(*conntablePtr,
- "Parameter must dereference to non-null pointer");
-
- ConnectionTable *conntable = *conntablePtr;
-
- parcTreeRedBlack_Destroy(&conntable->listById);
- parcHashCodeTable_Destroy(&conntable->indexByAddressPair);
- parcHashCodeTable_Destroy(&conntable->storageTableById);
- parcMemory_Deallocate((void **)&conntable);
- *conntablePtr = NULL;
-}
-
-/**
- * @function connectionTable_Add
- * @abstract Add a connection, takes ownership of memory
- */
-void connectionTable_Add(ConnectionTable *table, Connection *connection) {
- parcAssertNotNull(table, "Parameter table must be non-null");
- parcAssertNotNull(connection, "Parameter connection must be non-null");
-
- unsigned *connectionIdKey = parcMemory_Allocate(sizeof(unsigned));
- parcAssertNotNull(connectionIdKey, "parcMemory_Allocate(%zu) returned NULL",
- sizeof(unsigned));
- *connectionIdKey = connection_GetConnectionId(connection);
-
- if (parcHashCodeTable_Add(table->storageTableById, connectionIdKey,
- connection)) {
- parcHashCodeTable_Add(table->indexByAddressPair,
- (void *)connection_GetAddressPair(connection),
- connection);
- parcTreeRedBlack_Insert(table->listById, connectionIdKey, connection);
- } else {
- parcTrapUnexpectedState(
- "Could not add connection id %u -- is it a duplicate?",
- *connectionIdKey);
- }
-}
-
-/**
- * @function connectionTable_Remove
- * @abstract Removes the connection, calling Destroy on our copy
- */
-void connectionTable_Remove(ConnectionTable *table,
- const Connection *connection) {
- parcAssertNotNull(table, "Parameter table must be non-null");
- parcAssertNotNull(connection, "Parameter connection must be non-null");
-
- unsigned connid = connection_GetConnectionId(connection);
-
- parcTreeRedBlack_Remove(table->listById, &connid);
- parcHashCodeTable_Del(table->indexByAddressPair,
- connection_GetAddressPair(connection));
- parcHashCodeTable_Del(table->storageTableById, &connid);
-}
-
-void connectionTable_RemoveById(ConnectionTable *table, unsigned id) {
- parcAssertNotNull(table, "Parameter table must be non-null");
- const Connection *connection = connectionTable_FindById(table, id);
- if (connection) {
- connectionTable_Remove(table, connection);
- }
-}
-
-const Connection *connectionTable_FindByAddressPair(ConnectionTable *table,
- const AddressPair *pair) {
- parcAssertNotNull(table, "Parameter table must be non-null");
- return (Connection *)parcHashCodeTable_Get(table->indexByAddressPair, pair);
-}
-
-const Connection *connectionTable_FindById(ConnectionTable *table,
- unsigned id) {
- parcAssertNotNull(table, "Parameter table must be non-null");
- return (Connection *)parcHashCodeTable_Get(table->storageTableById, &id);
-}
-
-ConnectionList *connectionTable_GetEntries(const ConnectionTable *table) {
- parcAssertNotNull(table, "Parameter table must be non-null");
- ConnectionList *list = connectionList_Create();
-
- PARCArrayList *values = parcTreeRedBlack_Values(table->listById);
- for (size_t i = 0; i < parcArrayList_Size(values); i++) {
- Connection *original = parcArrayList_Get(values, i);
- connectionList_Append(list, original);
- }
- parcArrayList_Destroy(&values);
- return list;
-}