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/* This module emulates a linked list for lazyfree testing of modules, which
is a simplified version of 'hellotype.c'
*/
#include "redismodule.h"
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <stdint.h>
static RedisModuleType *LazyFreeLinkType;
struct LazyFreeLinkNode {
int64_t value;
struct LazyFreeLinkNode *next;
};
struct LazyFreeLinkObject {
struct LazyFreeLinkNode *head;
size_t len; /* Number of elements added. */
};
struct LazyFreeLinkObject *createLazyFreeLinkObject(void) {
struct LazyFreeLinkObject *o;
o = RedisModule_Alloc(sizeof(*o));
o->head = NULL;
o->len = 0;
return o;
}
void LazyFreeLinkInsert(struct LazyFreeLinkObject *o, int64_t ele) {
struct LazyFreeLinkNode *next = o->head, *newnode, *prev = NULL;
while(next && next->value < ele) {
prev = next;
next = next->next;
}
newnode = RedisModule_Alloc(sizeof(*newnode));
newnode->value = ele;
newnode->next = next;
if (prev) {
prev->next = newnode;
} else {
o->head = newnode;
}
o->len++;
}
void LazyFreeLinkReleaseObject(struct LazyFreeLinkObject *o) {
struct LazyFreeLinkNode *cur, *next;
cur = o->head;
while(cur) {
next = cur->next;
RedisModule_Free(cur);
cur = next;
}
RedisModule_Free(o);
}
/* LAZYFREELINK.INSERT key value */
int LazyFreeLinkInsert_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
RedisModule_AutoMemory(ctx); /* Use automatic memory management. */
if (argc != 3) return RedisModule_WrongArity(ctx);
RedisModuleKey *key = RedisModule_OpenKey(ctx,argv[1],
REDISMODULE_READ|REDISMODULE_WRITE);
int type = RedisModule_KeyType(key);
if (type != REDISMODULE_KEYTYPE_EMPTY &&
RedisModule_ModuleTypeGetType(key) != LazyFreeLinkType)
{
return RedisModule_ReplyWithError(ctx,REDISMODULE_ERRORMSG_WRONGTYPE);
}
long long value;
if ((RedisModule_StringToLongLong(argv[2],&value) != REDISMODULE_OK)) {
return RedisModule_ReplyWithError(ctx,"ERR invalid value: must be a signed 64 bit integer");
}
struct LazyFreeLinkObject *hto;
if (type == REDISMODULE_KEYTYPE_EMPTY) {
hto = createLazyFreeLinkObject();
RedisModule_ModuleTypeSetValue(key,LazyFreeLinkType,hto);
} else {
hto = RedisModule_ModuleTypeGetValue(key);
}
LazyFreeLinkInsert(hto,value);
RedisModule_SignalKeyAsReady(ctx,argv[1]);
RedisModule_ReplyWithLongLong(ctx,hto->len);
RedisModule_ReplicateVerbatim(ctx);
return REDISMODULE_OK;
}
/* LAZYFREELINK.LEN key */
int LazyFreeLinkLen_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
RedisModule_AutoMemory(ctx); /* Use automatic memory management. */
if (argc != 2) return RedisModule_WrongArity(ctx);
RedisModuleKey *key = RedisModule_OpenKey(ctx,argv[1],
REDISMODULE_READ);
int type = RedisModule_KeyType(key);
if (type != REDISMODULE_KEYTYPE_EMPTY &&
RedisModule_ModuleTypeGetType(key) != LazyFreeLinkType)
{
return RedisModule_ReplyWithError(ctx,REDISMODULE_ERRORMSG_WRONGTYPE);
}
struct LazyFreeLinkObject *hto = RedisModule_ModuleTypeGetValue(key);
RedisModule_ReplyWithLongLong(ctx,hto ? hto->len : 0);
return REDISMODULE_OK;
}
void *LazyFreeLinkRdbLoad(RedisModuleIO *rdb, int encver) {
if (encver != 0) {
return NULL;
}
uint64_t elements = RedisModule_LoadUnsigned(rdb);
struct LazyFreeLinkObject *hto = createLazyFreeLinkObject();
while(elements--) {
int64_t ele = RedisModule_LoadSigned(rdb);
LazyFreeLinkInsert(hto,ele);
}
return hto;
}
void LazyFreeLinkRdbSave(RedisModuleIO *rdb, void *value) {
struct LazyFreeLinkObject *hto = value;
struct LazyFreeLinkNode *node = hto->head;
RedisModule_SaveUnsigned(rdb,hto->len);
while(node) {
RedisModule_SaveSigned(rdb,node->value);
node = node->next;
}
}
void LazyFreeLinkAofRewrite(RedisModuleIO *aof, RedisModuleString *key, void *value) {
struct LazyFreeLinkObject *hto = value;
struct LazyFreeLinkNode *node = hto->head;
while(node) {
RedisModule_EmitAOF(aof,"LAZYFREELINK.INSERT","sl",key,node->value);
node = node->next;
}
}
void LazyFreeLinkFree(void *value) {
LazyFreeLinkReleaseObject(value);
}
size_t LazyFreeLinkFreeEffort(RedisModuleString *key, const void *value) {
REDISMODULE_NOT_USED(key);
const struct LazyFreeLinkObject *hto = value;
return hto->len;
}
void LazyFreeLinkUnlink(RedisModuleString *key, const void *value) {
REDISMODULE_NOT_USED(key);
REDISMODULE_NOT_USED(value);
/* Here you can know which key and value is about to be freed. */
}
int RedisModule_OnLoad(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
REDISMODULE_NOT_USED(argv);
REDISMODULE_NOT_USED(argc);
if (RedisModule_Init(ctx,"lazyfreetest",1,REDISMODULE_APIVER_1)
== REDISMODULE_ERR) return REDISMODULE_ERR;
/* We only allow our module to be loaded when the redis core version is greater than the version of my module */
if (RedisModule_GetTypeMethodVersion() < REDISMODULE_TYPE_METHOD_VERSION) {
return REDISMODULE_ERR;
}
RedisModuleTypeMethods tm = {
.version = REDISMODULE_TYPE_METHOD_VERSION,
.rdb_load = LazyFreeLinkRdbLoad,
.rdb_save = LazyFreeLinkRdbSave,
.aof_rewrite = LazyFreeLinkAofRewrite,
.free = LazyFreeLinkFree,
.free_effort = LazyFreeLinkFreeEffort,
.unlink = LazyFreeLinkUnlink,
};
LazyFreeLinkType = RedisModule_CreateDataType(ctx,"test_lazy",0,&tm);
if (LazyFreeLinkType == NULL) return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"lazyfreelink.insert",
LazyFreeLinkInsert_RedisCommand,"write deny-oom",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"lazyfreelink.len",
LazyFreeLinkLen_RedisCommand,"readonly",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
return REDISMODULE_OK;
}
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