Application Log

Detailed Description

Application log logs application status and abnormal conditions. There is a dedicated thread to log messages to file (disk). This ensures that blocking IO operations are isolated from other DNS query processing threads.

Data Structures
struct	app_log_loop_args_s

Typedefs
typedef enum app_log_msg_id_e	app_log_msg_id_t
typedef struct app_log_loop_args_s	app_log_loop_args_t

Enumerations
enum	app_log_msg_id_e {   APP_LOG_MSG_CUSTOM = 0 , APP_LOG_MSG_VL_FN_EPOLL , APP_LOG_MSG_VL_FN_TCP_CONN_CLIENT_IP_FAM , APP_LOG_MSG_VL_FN_TCP_CONN_LOCAL_IP_FAM ,   APP_LOG_MSG_VL_FN_TCP_CONN_GETSOCKNAME , APP_LOG_MSG_VL_RUN_CPU_AFFINITY }

Functions
void *	log_app_loop (void *args)

Typedef Documentation

app_log_loop_args_t

typedef struct app_log_loop_args_s app_log_loop_args_t

Structure holds arguments for log_app_loop() function. As log_app_loop function is started via a pthread it can only handle a single argument hence having a structure to hold all the different arguments log_app_loop needs.

app_log_msg_id_t

typedef enum app_log_msg_id_e app_log_msg_id_t

Enumerated static predefined application log messages. Order matters and MUST match one for app_log_msg_id_txt.

Enumeration Type Documentation

app_log_msg_id_e

enum app_log_msg_id_e

Enumerated static predefined application log messages. Order matters and MUST match one for app_log_msg_id_txt.

Function Documentation

log_app_loop()

void * log_app_loop

(

void *

args

)

Application log loop function. This function is started by pthread.

Parameters

args	Arguments passed to application log loop.

Returns

On loop exit returns a NULL pointer only because it needs to abide by pthread API.

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