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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.
*/
#include <src/config.h>
#include <stdio.h>
#include <parc/algol/parc_Memory.h>
#include <src/content_store/contentStoreEntry.h>
#include <parc/assert/parc_Assert.h>
const uint64_t contentStoreEntry_MaxExpiryTime = UINT64_MAX;
struct contentstore_entry {
Message *message;
ListLruEntry *lruEntry;
unsigned refcount;
bool hasExpiryTimeTicks;
uint64_t expiryTimeTicks;
};
ContentStoreEntry *contentStoreEntry_Create(Message *contentMessage,
ListLru *listLRU) {
parcAssertNotNull(contentMessage, "Parameter objectMessage must be non-null");
ContentStoreEntry *entry =
parcMemory_AllocateAndClear(sizeof(ContentStoreEntry));
parcAssertNotNull(entry, "parcMemory_AllocateAndClear(%zu) returned NULL",
sizeof(ContentStoreEntry));
entry->message = message_Acquire(contentMessage);
entry->refcount = 1;
if (listLRU != NULL) {
entry->lruEntry = listLRU_NewHeadEntry(listLRU, entry);
}
entry->hasExpiryTimeTicks = message_HasContentExpiryTime(contentMessage);
if (entry->hasExpiryTimeTicks) {
entry->expiryTimeTicks = message_GetContentExpiryTimeTicks(contentMessage);
}
return entry;
}
ContentStoreEntry *contentStoreEntry_Acquire(
const ContentStoreEntry *original) {
parcAssertNotNull(original, "Parameter must be non-null");
((ContentStoreEntry *)original)->refcount++;
return (ContentStoreEntry *)original;
}
void contentStoreEntry_Release(ContentStoreEntry **entryPtr) {
parcAssertNotNull(entryPtr, "Parameter must be non-null double pointer");
parcAssertNotNull(*entryPtr,
"Parameter must dereference to non-null pointer");
ContentStoreEntry *entry = *entryPtr;
parcAssertTrue(entry->refcount > 0, "Illegal state: has refcount of 0");
entry->refcount--;
if (entry->refcount == 0) {
if (entry->lruEntry) {
listLRU_EntryDestroy(&entry->lruEntry);
}
message_Release(&entry->message);
parcMemory_Deallocate((void **)&entry);
}
*entryPtr = NULL;
}
Message *contentStoreEntry_GetMessage(const ContentStoreEntry *storeEntry) {
parcAssertNotNull(storeEntry, "Parameter must be non-null");
return storeEntry->message;
}
bool contentStoreEntry_HasExpiryTimeTicks(const ContentStoreEntry *storeEntry) {
parcAssertNotNull(storeEntry, "Parameter must be non-null");
return storeEntry->hasExpiryTimeTicks;
}
uint64_t contentStoreEntry_GetExpiryTimeTicks(
const ContentStoreEntry *storeEntry) {
parcAssertNotNull(storeEntry, "Parameter must be non-null");
parcAssertTrue(storeEntry->hasExpiryTimeTicks,
"storeEntry has no ExpiryTimeTicks. Did you call "
"contentStoreEntry_HasExpiryTimeTicks() first?");
return storeEntry->expiryTimeTicks;
}
int contentStoreEntry_CompareExpiryTime(const ContentStoreEntry *value1,
const ContentStoreEntry *value2) {
// A signum comparison. negative if key 1 is smaller, 0 if key1 == key2,
// greater than 0 if key1 is bigger.
ContentStoreEntry *v1 = (ContentStoreEntry *)value1;
ContentStoreEntry *v2 = (ContentStoreEntry *)value2;
if (v1->expiryTimeTicks < v2->expiryTimeTicks) {
return -1;
} else if (v1->expiryTimeTicks > v2->expiryTimeTicks) {
return +1;
} else {
// At this point, the times are the same. Use the address of the message as
// the decider. This allows us to store multiple messages with the same
// expiry/cache time.
if (v1->message < v2->message) {
return -1;
} else if (v1->message > v2->message) {
return +1;
}
}
return 0; // The same message has been encountered.
}
void contentStoreEntry_MoveToHead(ContentStoreEntry *storeEntry) {
parcAssertNotNull(storeEntry, "Parameter must be non-null");
parcAssertNotNull(storeEntry->lruEntry,
"ContentStoreEntry is not attached to an ListLru");
if (storeEntry->lruEntry) {
listLRU_EntryMoveToHead(storeEntry->lruEntry);
}
}
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