17 #elif defined(HAVE_DB4_DB_H)
20 #error Neither <db.h> nor <db4/db.h> was found by configure. Install db4-devel.
29 enum CtdlThreadState {
33 CTDL_THREAD_CANCELLED,
36 CTDL_THREAD_STOP_REQ, /* Do NOT put any running states before this state */
40 CTDL_THREAD_LAST_STATE
42 typedef struct CtdlThreadNode CtdlThreadNode;
44 struct CtdlThreadNode{
45 pthread_t tid; /* id as returned by pthread_create() */
46 pid_t pid; /* pid, as best the OS will let us determine */
47 time_t when; /* When to start a scheduled thread */
48 struct CitContext *Context; /* The session context that this thread mught be working on or NULL if none */
49 long number; /* A unigue number for this thread (not implimented yet) */
50 int wakefd_recv; /* An fd that this thread can sleep on (not implimented yet) */
51 int wakefd_send; /* An fd that this thread can send out on (Not implimented yet) */
52 int signal; /* A field to store a signal we caught. */
53 const char *name; /* A name for this thread */
54 void *(*thread_func) (void *arg); /* The actual function that does this threads work */
55 void *user_args; /* Arguments passed to this threads work function */
56 long flags; /* Flags that describe this thread */
57 enum CtdlThreadState state; /* Flag to show state of this thread */
58 pthread_mutex_t ThreadMutex; /* A mutex to sync this thread to others if this thread allows (also used for sleeping) */
59 pthread_cond_t ThreadCond; /* A condition variable to sync this thread with others */
60 pthread_mutex_t SleepMutex; /* A mutex for sleeping */
61 pthread_cond_t SleepCond; /* A condition variable for sleeping */
62 pthread_attr_t attr; /* Attributes of this thread */
63 struct timeval start_time; /* Time this thread was started */
64 struct timeval last_state_change; /* Time when this thread last changed state */
65 double avg_sleeping; /* Average sleeping time */
66 double avg_running; /* Average running time */
67 double avg_blocked; /* Average blocked time */
68 double load_avg; /* Load average for this thread */
69 CtdlThreadNode *prev; /* Previous thread in the thread table */
70 CtdlThreadNode *next; /* Next thread in the thread table */
73 extern CtdlThreadNode *CtdlThreadList;
75 typedef struct ThreadTSD ThreadTSD;
78 DB_TXN *tid; /* Transaction handle */
79 DBC *cursors[MAXCDB]; /* Cursors, for traversals... */
80 CtdlThreadNode *self; /* Pointer to this threads control structure */
83 extern double CtdlThreadLoadAvg;
84 extern double CtdlThreadWorkerAvg;
85 extern pthread_key_t ThreadKey;
87 void ctdl_thread_internal_init_tsd(void);
88 void ctdl_internal_thread_gc (void);
89 void ctdl_thread_internal_init(void);
90 void ctdl_thread_internal_cleanup(void);
91 void ctdl_thread_internal_calc_loadavg(void);
92 void ctdl_thread_internal_free_tsd(void);
93 CtdlThreadNode *ctdl_internal_create_thread(char *name, long flags, void *(*thread_func) (void *arg), void *args);
94 void ctdl_thread_internal_check_scheduled(void);
96 void InitialiseSemaphores(void);
97 int try_critical_section (int which_one);
98 void begin_critical_section (int which_one);
99 void end_critical_section (int which_one);
100 void go_threading(void);