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// SPDX-FileCopyrightText: 2024 Redict Contributors
// SPDX-FileCopyrightText: 2024 Salvatore Sanfilippo <antirez at gmail dot com>
//
// SPDX-License-Identifier: BSD-3-Clause
// SPDX-License-Identifier: LGPL-3.0-only
#include "redictmodule.h"
#include <string.h>
#include <assert.h>
#include <unistd.h>
#define UNUSED(V) ((void) V)
/* Registered type */
RedictModuleType *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;
RedictModuleString *str;
RedictModuleDict *dict;
} data;
} udt_t;
void udt_free(void *value) {
udt_t *udt = value;
switch (udt->type) {
case (UDT_RAW): {
RedictModule_Free(udt->data.raw.ptr);
break;
}
case (UDT_STRING): {
RedictModule_FreeString(NULL, udt->data.str);
break;
}
case (UDT_DICT): {
RedictModuleString *dk, *dv;
RedictModuleDictIter *iter = RedictModule_DictIteratorStartC(udt->data.dict, "^", NULL, 0);
while((dk = RedictModule_DictNext(NULL, iter, (void **)&dv)) != NULL) {
RedictModule_FreeString(NULL, dk);
RedictModule_FreeString(NULL, dv);
}
RedictModule_DictIteratorStop(iter);
RedictModule_FreeDict(NULL, udt->data.dict);
break;
}
}
RedictModule_Free(udt);
}
void udt_rdb_save(RedictModuleIO *rdb, void *value) {
udt_t *udt = value;
RedictModule_SaveUnsigned(rdb, udt->type);
switch (udt->type) {
case (UDT_RAW): {
RedictModule_SaveStringBuffer(rdb, udt->data.raw.ptr, udt->data.raw.len);
break;
}
case (UDT_STRING): {
RedictModule_SaveString(rdb, udt->data.str);
break;
}
case (UDT_DICT): {
RedictModule_SaveUnsigned(rdb, RedictModule_DictSize(udt->data.dict));
RedictModuleString *dk, *dv;
RedictModuleDictIter *iter = RedictModule_DictIteratorStartC(udt->data.dict, "^", NULL, 0);
while((dk = RedictModule_DictNext(NULL, iter, (void **)&dv)) != NULL) {
RedictModule_SaveString(rdb, dk);
RedictModule_SaveString(rdb, dv);
RedictModule_FreeString(NULL, dk); /* Allocated by RedictModule_DictNext */
}
RedictModule_DictIteratorStop(iter);
break;
}
}
}
void *udt_rdb_load(RedictModuleIO *rdb, int encver) {
if (encver != 0)
return NULL;
udt_t *udt = RedictModule_Alloc(sizeof(*udt));
udt->type = RedictModule_LoadUnsigned(rdb);
switch (udt->type) {
case (UDT_RAW): {
udt->data.raw.ptr = RedictModule_LoadStringBuffer(rdb, &udt->data.raw.len);
break;
}
case (UDT_STRING): {
udt->data.str = RedictModule_LoadString(rdb);
break;
}
case (UDT_DICT): {
long long dict_len = RedictModule_LoadUnsigned(rdb);
udt->data.dict = RedictModule_CreateDict(NULL);
for (int i = 0; i < dict_len; i += 2) {
RedictModuleString *key = RedictModule_LoadString(rdb);
RedictModuleString *val = RedictModule_LoadString(rdb);
RedictModule_DictSet(udt->data.dict, key, val);
}
break;
}
}
return udt;
}
size_t udt_mem_usage(RedictModuleKeyOptCtx *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 += RedictModule_MallocSize(udt->data.raw.ptr);
break;
}
case (UDT_STRING): {
size += RedictModule_MallocSizeString(udt->data.str);
break;
}
case (UDT_DICT): {
void *dk;
size_t keylen;
RedictModuleString *dv;
RedictModuleDictIter *iter = RedictModule_DictIteratorStartC(udt->data.dict, "^", NULL, 0);
while((dk = RedictModule_DictNextC(iter, &keylen, (void **)&dv)) != NULL) {
size += keylen;
size += RedictModule_MallocSizeString(dv);
}
RedictModule_DictIteratorStop(iter);
break;
}
}
return size;
}
/* MALLOCSIZE.SETRAW key len */
int cmd_setraw(RedictModuleCtx *ctx, RedictModuleString **argv, int argc) {
if (argc != 3)
return RedictModule_WrongArity(ctx);
RedictModuleKey *key = RedictModule_OpenKey(ctx, argv[1], REDICTMODULE_WRITE);
udt_t *udt = RedictModule_Alloc(sizeof(*udt));
udt->type = UDT_RAW;
long long raw_len;
RedictModule_StringToLongLong(argv[2], &raw_len);
udt->data.raw.ptr = RedictModule_Alloc(raw_len);
udt->data.raw.len = raw_len;
RedictModule_ModuleTypeSetValue(key, mallocsize_type, udt);
RedictModule_CloseKey(key);
return RedictModule_ReplyWithSimpleString(ctx, "OK");
}
/* MALLOCSIZE.SETSTR key string */
int cmd_setstr(RedictModuleCtx *ctx, RedictModuleString **argv, int argc) {
if (argc != 3)
return RedictModule_WrongArity(ctx);
RedictModuleKey *key = RedictModule_OpenKey(ctx, argv[1], REDICTMODULE_WRITE);
udt_t *udt = RedictModule_Alloc(sizeof(*udt));
udt->type = UDT_STRING;
udt->data.str = argv[2];
RedictModule_RetainString(ctx, argv[2]);
RedictModule_ModuleTypeSetValue(key, mallocsize_type, udt);
RedictModule_CloseKey(key);
return RedictModule_ReplyWithSimpleString(ctx, "OK");
}
/* MALLOCSIZE.SETDICT key field value [field value ...] */
int cmd_setdict(RedictModuleCtx *ctx, RedictModuleString **argv, int argc) {
if (argc < 4 || argc % 2)
return RedictModule_WrongArity(ctx);
RedictModuleKey *key = RedictModule_OpenKey(ctx, argv[1], REDICTMODULE_WRITE);
udt_t *udt = RedictModule_Alloc(sizeof(*udt));
udt->type = UDT_DICT;
udt->data.dict = RedictModule_CreateDict(ctx);
for (int i = 2; i < argc; i += 2) {
RedictModule_DictSet(udt->data.dict, argv[i], argv[i+1]);
/* No need to retain argv[i], it is copied as the rax key */
RedictModule_RetainString(ctx, argv[i+1]);
}
RedictModule_ModuleTypeSetValue(key, mallocsize_type, udt);
RedictModule_CloseKey(key);
return RedictModule_ReplyWithSimpleString(ctx, "OK");
}
int RedictModule_OnLoad(RedictModuleCtx *ctx, RedictModuleString **argv, int argc) {
UNUSED(argv);
UNUSED(argc);
if (RedictModule_Init(ctx,"mallocsize",1,REDICTMODULE_APIVER_1)== REDICTMODULE_ERR)
return REDICTMODULE_ERR;
RedictModuleTypeMethods tm = {
.version = REDICTMODULE_TYPE_METHOD_VERSION,
.rdb_load = udt_rdb_load,
.rdb_save = udt_rdb_save,
.free = udt_free,
.mem_usage2 = udt_mem_usage,
};
mallocsize_type = RedictModule_CreateDataType(ctx, "allocsize", 0, &tm);
if (mallocsize_type == NULL)
return REDICTMODULE_ERR;
if (RedictModule_CreateCommand(ctx, "mallocsize.setraw", cmd_setraw, "", 1, 1, 1) == REDICTMODULE_ERR)
return REDICTMODULE_ERR;
if (RedictModule_CreateCommand(ctx, "mallocsize.setstr", cmd_setstr, "", 1, 1, 1) == REDICTMODULE_ERR)
return REDICTMODULE_ERR;
if (RedictModule_CreateCommand(ctx, "mallocsize.setdict", cmd_setdict, "", 1, 1, 1) == REDICTMODULE_ERR)
return REDICTMODULE_ERR;
return REDICTMODULE_OK;
}
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