Function RM_GetSharedAPI

app/redis-6.2.6/src/module.c:7288–7297

Request an exported API pointer. The return value is just a void pointer * that the caller of this function will be required to cast to the right * function pointer, so this is a private contract between modules. * * If the requested API is not available then NULL is returned. Because * modules can be loaded at different times with different order, this * function calls should be put inside

 *     }
 */
void *RM_GetSharedAPI(RedisModuleCtx *ctx, const char *apiname) {
    dictEntry *de = dictFind(server.sharedapi, apiname);
    if (de == NULL) return NULL;
    RedisModuleSharedAPI *sapi = dictGetVal(de);
    if (listSearchKey(sapi->module->usedby,ctx->module) == NULL) {
        listAddNodeTail(sapi->module->usedby,ctx->module);
        listAddNodeTail(ctx->module->using,sapi->module);
    }
    return sapi->func;
}

/* Remove all the APIs registered by the specified module. Usually you
 * want this when the module is going to be unloaded. This function