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#include "redismodule.h"
#include <string.h>
#include <assert.h>
#include <unistd.h>
#define UNUSED(V) ((void) V)
/* Registered type */
RedisModuleType *mallocsize_type = NULL;
typedef enum {
UDT_RAW,
UDT_STRING,
UDT_DICT
} udt_type_t;
typedef struct {
void *ptr;
size_t len;
} raw_t;
typedef struct {
udt_type_t type;
union {
raw_t raw;
RedisModuleString *str;
RedisModuleDict *dict;
} data;
} udt_t;
void udt_free(void *value) {
udt_t *udt = value;
switch (udt->type) {
case (UDT_RAW): {
RedisModule_Free(udt->data.raw.ptr);
break;
}
case (UDT_STRING): {
RedisModule_FreeString(NULL, udt->data.str);
break;
}
case (UDT_DICT): {
RedisModuleString *dk, *dv;
RedisModuleDictIter *iter = RedisModule_DictIteratorStartC(udt->data.dict, "^", NULL, 0);
while((dk = RedisModule_DictNext(NULL, iter, (void **)&dv)) != NULL) {
RedisModule_FreeString(NULL, dk);
RedisModule_FreeString(NULL, dv);
}
RedisModule_DictIteratorStop(iter);
RedisModule_FreeDict(NULL, udt->data.dict);
break;
}
}
RedisModule_Free(udt);
}
void udt_rdb_save(RedisModuleIO *rdb, void *value) {
udt_t *udt = value;
RedisModule_SaveUnsigned(rdb, udt->type);
switch (udt->type) {
case (UDT_RAW): {
RedisModule_SaveStringBuffer(rdb, udt->data.raw.ptr, udt->data.raw.len);
break;
}
case (UDT_STRING): {
RedisModule_SaveString(rdb, udt->data.str);
break;
}
case (UDT_DICT): {
RedisModule_SaveUnsigned(rdb, RedisModule_DictSize(udt->data.dict));
RedisModuleString *dk, *dv;
RedisModuleDictIter *iter = RedisModule_DictIteratorStartC(udt->data.dict, "^", NULL, 0);
while((dk = RedisModule_DictNext(NULL, iter, (void **)&dv)) != NULL) {
RedisModule_SaveString(rdb, dk);
RedisModule_SaveString(rdb, dv);
RedisModule_FreeString(NULL, dk); /* Allocated by RedisModule_DictNext */
}
RedisModule_DictIteratorStop(iter);
break;
}
}
}
void *udt_rdb_load(RedisModuleIO *rdb, int encver) {
if (encver != 0)
return NULL;
udt_t *udt = RedisModule_Alloc(sizeof(*udt));
udt->type = RedisModule_LoadUnsigned(rdb);
switch (udt->type) {
case (UDT_RAW): {
udt->data.raw.ptr = RedisModule_LoadStringBuffer(rdb, &udt->data.raw.len);
break;
}
case (UDT_STRING): {
udt->data.str = RedisModule_LoadString(rdb);
break;
}
case (UDT_DICT): {
long long dict_len = RedisModule_LoadUnsigned(rdb);
udt->data.dict = RedisModule_CreateDict(NULL);
for (int i = 0; i < dict_len; i += 2) {
RedisModuleString *key = RedisModule_LoadString(rdb);
RedisModuleString *val = RedisModule_LoadString(rdb);
RedisModule_DictSet(udt->data.dict, key, val);
}
break;
}
}
return udt;
}
size_t udt_mem_usage(RedisModuleKeyOptCtx *ctx, const void *value, size_t sample_size) {
UNUSED(ctx);
UNUSED(sample_size);
const udt_t *udt = value;
size_t size = sizeof(*udt);
switch (udt->type) {
case (UDT_RAW): {
size += RedisModule_MallocSize(udt->data.raw.ptr);
break;
}
case (UDT_STRING): {
size += RedisModule_MallocSizeString(udt->data.str);
break;
}
case (UDT_DICT): {
void *dk;
size_t keylen;
RedisModuleString *dv;
RedisModuleDictIter *iter = RedisModule_DictIteratorStartC(udt->data.dict, "^", NULL, 0);
while((dk = RedisModule_DictNextC(iter, &keylen, (void **)&dv)) != NULL) {
size += keylen;
size += RedisModule_MallocSizeString(dv);
}
RedisModule_DictIteratorStop(iter);
break;
}
}
return size;
}
/* MALLOCSIZE.SETRAW key len */
int cmd_setraw(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
if (argc != 3)
return RedisModule_WrongArity(ctx);
RedisModuleKey *key = RedisModule_OpenKey(ctx, argv[1], REDISMODULE_WRITE);
udt_t *udt = RedisModule_Alloc(sizeof(*udt));
udt->type = UDT_RAW;
long long raw_len;
RedisModule_StringToLongLong(argv[2], &raw_len);
udt->data.raw.ptr = RedisModule_Alloc(raw_len);
udt->data.raw.len = raw_len;
RedisModule_ModuleTypeSetValue(key, mallocsize_type, udt);
RedisModule_CloseKey(key);
return RedisModule_ReplyWithSimpleString(ctx, "OK");
}
/* MALLOCSIZE.SETSTR key string */
int cmd_setstr(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
if (argc != 3)
return RedisModule_WrongArity(ctx);
RedisModuleKey *key = RedisModule_OpenKey(ctx, argv[1], REDISMODULE_WRITE);
udt_t *udt = RedisModule_Alloc(sizeof(*udt));
udt->type = UDT_STRING;
udt->data.str = argv[2];
RedisModule_RetainString(ctx, argv[2]);
RedisModule_ModuleTypeSetValue(key, mallocsize_type, udt);
RedisModule_CloseKey(key);
return RedisModule_ReplyWithSimpleString(ctx, "OK");
}
/* MALLOCSIZE.SETDICT key field value [field value ...] */
int cmd_setdict(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
if (argc < 4 || argc % 2)
return RedisModule_WrongArity(ctx);
RedisModuleKey *key = RedisModule_OpenKey(ctx, argv[1], REDISMODULE_WRITE);
udt_t *udt = RedisModule_Alloc(sizeof(*udt));
udt->type = UDT_DICT;
udt->data.dict = RedisModule_CreateDict(ctx);
for (int i = 2; i < argc; i += 2) {
RedisModule_DictSet(udt->data.dict, argv[i], argv[i+1]);
/* No need to retain argv[i], it is copied as the rax key */
RedisModule_RetainString(ctx, argv[i+1]);
}
RedisModule_ModuleTypeSetValue(key, mallocsize_type, udt);
RedisModule_CloseKey(key);
return RedisModule_ReplyWithSimpleString(ctx, "OK");
}
int RedisModule_OnLoad(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
UNUSED(argv);
UNUSED(argc);
if (RedisModule_Init(ctx,"mallocsize",1,REDISMODULE_APIVER_1)== REDISMODULE_ERR)
return REDISMODULE_ERR;
RedisModuleTypeMethods tm = {
.version = REDISMODULE_TYPE_METHOD_VERSION,
.rdb_load = udt_rdb_load,
.rdb_save = udt_rdb_save,
.free = udt_free,
.mem_usage2 = udt_mem_usage,
};
mallocsize_type = RedisModule_CreateDataType(ctx, "allocsize", 0, &tm);
if (mallocsize_type == NULL)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx, "mallocsize.setraw", cmd_setraw, "", 1, 1, 1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx, "mallocsize.setstr", cmd_setstr, "", 1, 1, 1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx, "mallocsize.setdict", cmd_setdict, "", 1, 1, 1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
return REDISMODULE_OK;
}
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