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eb915a82a5
If we want to support bits that can be overlapping, we need to make sure that: 1. we don't use the same bit for two return values. 2. values should be sorted so that prefer ones (matching more bits) come first.
161 lines
6.0 KiB
C
161 lines
6.0 KiB
C
#include "redismodule.h"
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#include <strings.h>
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int mutable_bool_val;
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int immutable_bool_val;
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long long longval;
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long long memval;
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RedisModuleString *strval = NULL;
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int enumval;
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int flagsval;
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/* Series of get and set callbacks for each type of config, these rely on the privdata ptr
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* to point to the config, and they register the configs as such. Note that one could also just
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* use names if they wanted, and store anything in privdata. */
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int getBoolConfigCommand(const char *name, void *privdata) {
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REDISMODULE_NOT_USED(name);
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return (*(int *)privdata);
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}
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int setBoolConfigCommand(const char *name, int new, void *privdata, RedisModuleString **err) {
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REDISMODULE_NOT_USED(name);
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REDISMODULE_NOT_USED(err);
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*(int *)privdata = new;
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return REDISMODULE_OK;
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}
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long long getNumericConfigCommand(const char *name, void *privdata) {
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REDISMODULE_NOT_USED(name);
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return (*(long long *) privdata);
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}
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int setNumericConfigCommand(const char *name, long long new, void *privdata, RedisModuleString **err) {
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REDISMODULE_NOT_USED(name);
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REDISMODULE_NOT_USED(err);
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*(long long *)privdata = new;
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return REDISMODULE_OK;
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}
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RedisModuleString *getStringConfigCommand(const char *name, void *privdata) {
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REDISMODULE_NOT_USED(name);
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REDISMODULE_NOT_USED(privdata);
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return strval;
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}
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int setStringConfigCommand(const char *name, RedisModuleString *new, void *privdata, RedisModuleString **err) {
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REDISMODULE_NOT_USED(name);
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REDISMODULE_NOT_USED(err);
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REDISMODULE_NOT_USED(privdata);
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size_t len;
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if (!strcasecmp(RedisModule_StringPtrLen(new, &len), "rejectisfreed")) {
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*err = RedisModule_CreateString(NULL, "Cannot set string to 'rejectisfreed'", 36);
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return REDISMODULE_ERR;
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}
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if (strval) RedisModule_FreeString(NULL, strval);
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RedisModule_RetainString(NULL, new);
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strval = new;
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return REDISMODULE_OK;
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}
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int getEnumConfigCommand(const char *name, void *privdata) {
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REDISMODULE_NOT_USED(name);
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REDISMODULE_NOT_USED(privdata);
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return enumval;
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}
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int setEnumConfigCommand(const char *name, int val, void *privdata, RedisModuleString **err) {
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REDISMODULE_NOT_USED(name);
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REDISMODULE_NOT_USED(err);
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REDISMODULE_NOT_USED(privdata);
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enumval = val;
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return REDISMODULE_OK;
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}
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int getFlagsConfigCommand(const char *name, void *privdata) {
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REDISMODULE_NOT_USED(name);
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REDISMODULE_NOT_USED(privdata);
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return flagsval;
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}
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int setFlagsConfigCommand(const char *name, int val, void *privdata, RedisModuleString **err) {
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REDISMODULE_NOT_USED(name);
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REDISMODULE_NOT_USED(err);
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REDISMODULE_NOT_USED(privdata);
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flagsval = val;
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return REDISMODULE_OK;
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}
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int boolApplyFunc(RedisModuleCtx *ctx, void *privdata, RedisModuleString **err) {
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REDISMODULE_NOT_USED(ctx);
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REDISMODULE_NOT_USED(privdata);
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if (mutable_bool_val && immutable_bool_val) {
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*err = RedisModule_CreateString(NULL, "Bool configs cannot both be yes.", 32);
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return REDISMODULE_ERR;
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}
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return REDISMODULE_OK;
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}
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int longlongApplyFunc(RedisModuleCtx *ctx, void *privdata, RedisModuleString **err) {
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REDISMODULE_NOT_USED(ctx);
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REDISMODULE_NOT_USED(privdata);
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if (longval == memval) {
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*err = RedisModule_CreateString(NULL, "These configs cannot equal each other.", 38);
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return REDISMODULE_ERR;
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}
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return REDISMODULE_OK;
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}
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int RedisModule_OnLoad(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
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REDISMODULE_NOT_USED(argv);
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REDISMODULE_NOT_USED(argc);
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if (RedisModule_Init(ctx, "moduleconfigs", 1, REDISMODULE_APIVER_1) == REDISMODULE_ERR) return REDISMODULE_ERR;
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if (RedisModule_RegisterBoolConfig(ctx, "mutable_bool", 1, REDISMODULE_CONFIG_DEFAULT, getBoolConfigCommand, setBoolConfigCommand, boolApplyFunc, &mutable_bool_val) == REDISMODULE_ERR) {
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return REDISMODULE_ERR;
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}
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/* Immutable config here. */
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if (RedisModule_RegisterBoolConfig(ctx, "immutable_bool", 0, REDISMODULE_CONFIG_IMMUTABLE, getBoolConfigCommand, setBoolConfigCommand, boolApplyFunc, &immutable_bool_val) == REDISMODULE_ERR) {
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return REDISMODULE_ERR;
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}
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if (RedisModule_RegisterStringConfig(ctx, "string", "secret password", REDISMODULE_CONFIG_DEFAULT, getStringConfigCommand, setStringConfigCommand, NULL, NULL) == REDISMODULE_ERR) {
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return REDISMODULE_ERR;
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}
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/* On the stack to make sure we're copying them. */
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const char *enum_vals[] = {"none", "five", "one", "two", "four"};
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const int int_vals[] = {0, 5, 1, 2, 4};
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if (RedisModule_RegisterEnumConfig(ctx, "enum", 1, REDISMODULE_CONFIG_DEFAULT, enum_vals, int_vals, 5, getEnumConfigCommand, setEnumConfigCommand, NULL, NULL) == REDISMODULE_ERR) {
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return REDISMODULE_ERR;
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}
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if (RedisModule_RegisterEnumConfig(ctx, "flags", 3, REDISMODULE_CONFIG_DEFAULT | REDISMODULE_CONFIG_BITFLAGS, enum_vals, int_vals, 5, getFlagsConfigCommand, setFlagsConfigCommand, NULL, NULL) == REDISMODULE_ERR) {
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return REDISMODULE_ERR;
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}
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/* Memory config here. */
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if (RedisModule_RegisterNumericConfig(ctx, "memory_numeric", 1024, REDISMODULE_CONFIG_DEFAULT | REDISMODULE_CONFIG_MEMORY, 0, 3000000, getNumericConfigCommand, setNumericConfigCommand, longlongApplyFunc, &memval) == REDISMODULE_ERR) {
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return REDISMODULE_ERR;
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}
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if (RedisModule_RegisterNumericConfig(ctx, "numeric", -1, REDISMODULE_CONFIG_DEFAULT, -5, 2000, getNumericConfigCommand, setNumericConfigCommand, longlongApplyFunc, &longval) == REDISMODULE_ERR) {
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return REDISMODULE_ERR;
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}
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size_t len;
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if (argc && !strcasecmp(RedisModule_StringPtrLen(argv[0], &len), "noload")) {
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return REDISMODULE_OK;
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} else if (RedisModule_LoadConfigs(ctx) == REDISMODULE_ERR) {
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if (strval) {
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RedisModule_FreeString(ctx, strval);
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strval = NULL;
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}
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return REDISMODULE_ERR;
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}
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return REDISMODULE_OK;
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}
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int RedisModule_OnUnload(RedisModuleCtx *ctx) {
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REDISMODULE_NOT_USED(ctx);
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if (strval) {
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RedisModule_FreeString(ctx, strval);
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strval = NULL;
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}
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return REDISMODULE_OK;
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}
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