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Post-review fixes + some bugs fixed + several minor features

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This commit is contained in:
petr@mysql.com
2005-02-11 14:21:59 +03:00
parent 0eddb07ff7
commit 6b50b5b087
21 changed files with 593 additions and 376 deletions
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49
server-tools/instance-manager/guardian.h
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@ -19,6 +19,7 @@
#include <my_global.h>
#include <my_sys.h>
#include <my_list.h>
#include "thread_registry.h"
#ifdef __GNUC__
#pragma interface
@ -26,9 +27,8 @@
class Instance;
class Instance_map;
#include "thread_registry.h"
#include "instance.h"
class Thread_registry;
struct GUARD_NODE;
C_MODE_START
@ -36,19 +36,11 @@ pthread_handler_decl(guardian, arg);
C_MODE_END
typedef struct st_guard_node
{
Instance *instance;
uint restart_counter;
time_t crash_moment;
} GUARD_NODE;
struct Guardian_thread_args
{
Thread_registry &thread_registry;
Instance_map *instance_map;
uint monitoring_interval;
int monitoring_interval;
Guardian_thread_args(Thread_registry &thread_registry_arg,
Instance_map *instance_map_arg,
@ -72,36 +64,41 @@ public:
Instance_map *instance_map_arg,
uint monitoring_interval_arg);
~Guardian_thread();
/* Main funtion of the thread */
void run();
int start();
void shutdown();
void request_stop_instances();
/* Initialize list of guarded instances */
int init();
/* Request guardian shutdown. Stop instances if needed */
void request_shutdown(bool stop_instances);
/* Start instance protection */
int guard(Instance *instance);
/* Stop instance protection */
int stop_guard(Instance *instance);
bool is_stopped;
/* Returns true if guardian thread is stopped */
int is_stopped();
public:
pthread_cond_t COND_guardian;
private:
int stop_instances();
int add_instance_to_list(Instance *instance, LIST **list);
void move_to_list(LIST **from, LIST **to);
/* Prepares Guardian shutdown. Stops instances is needed */
int stop_instances(bool stop_instances_arg);
/* check instance state and act accordingly */
void process_instance(Instance *instance, GUARD_NODE *current_node,
LIST **guarded_instances, LIST *elem);
int stopped;
private:
/* states of an instance */
enum { NOT_STARTED= 1, STARTING, STARTED, JUST_CRASHED, CRASHED,
CRASHED_AND_ABANDONED, STOPPING };
pthread_mutex_t LOCK_guardian;
Thread_info thread_info;
LIST *guarded_instances;
LIST *starting_instances;
MEM_ROOT alloc;
enum { MEM_ROOT_BLOCK_SIZE= 512 };
/* this variable is set to TRUE when we want to stop Guardian thread */
bool shutdown_guardian;
/*
This var is usually set together with shutdown_guardian. this way we
request guardian to shut down all instances before termination
*/
bool request_stop;
bool shutdown_requested;
};
#endif /* INCLUDES_MYSQL_INSTANCE_MANAGER_GUARDIAN_H */