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common_public.h
#ifndef MQTT_WEBSOCKETS_COMMON_PUBLIC_H #define MQTT_WEBSOCKETS_COMMON_PUBLIC_H #include <stddef.h> /* free_fnc_t in general (in whatever function or struct it is used) * decides how the related data will be handled. * - If NULL the data are copied internally (causing malloc and later free) * - If pointer provided the free function pointed will be called when data are no longer needed * to free associated memory. This is effectively transfering ownership of that pointer to the library. * This also allows caller to provide custom free function other than system one. * - If == CALLER_RESPONSIBILITY the library will not copy the data pointed to and will not call free * at the end. This is usefull to avoid copying memory (and associated malloc/free) when data are for * example static. In this case caller has to guarantee the memory pointed to will be valid for entire duration * it is needed. For example by freeing the data after PUBACK is received or by data being static. */ typedef void (*free_fnc_t)(void *ptr); void _caller_responsibility(void *ptr); #define CALLER_RESPONSIBILITY ((free_fnc_t)&_caller_responsibility) struct mqtt_ng_stats { size_t tx_bytes_queued; int tx_messages_queued; int tx_messages_sent; int rx_messages_rcvd; size_t tx_buffer_used; size_t tx_buffer_free; size_t tx_buffer_size; // part of transaction buffer that containes mesages we can free alredy during the garbage colleciton step size_t tx_buffer_reclaimable; }; #endif /* MQTT_WEBSOCKETS_COMMON_PUBLIC_H */