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/* Thread management routine header.
* Copyright (C) 1998 Kunihiro Ishiguro
*
* This file is part of GNU Zebra.
*
* GNU Zebra is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* GNU Zebra is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Zebra; see the file COPYING. If not, write to the Free
* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
#ifndef _ZEBRA_THREAD_H
#define _ZEBRA_THREAD_H
#ifdef HAVE_RUSAGE
#define RUSAGE_T struct rusage
#define GETRUSAGE(X) getrusage (RUSAGE_SELF, X);
#else
#define RUSAGE_T struct timeval
#define GETRUSAGE(X) gettimeofday (X, NULL);
#endif /* HAVE_RUSAGE */
/* Linked list of thread. */
struct thread_list
{
struct thread *head;
struct thread *tail;
int count;
};
/* Master of the theads. */
struct thread_master
{
struct thread_list read;
struct thread_list write;
struct thread_list timer;
struct thread_list event;
struct thread_list ready;
struct thread_list unuse;
fd_set readfd;
fd_set writefd;
fd_set exceptfd;
unsigned long alloc;
};
/* Thread itself. */
struct thread
{
unsigned char type; /* thread type */
struct thread *next; /* next pointer of the thread */
struct thread *prev; /* previous pointer of the thread */
struct thread_master *master; /* pointer to the struct thread_master. */
int (*func) (struct thread *); /* event function */
void *arg; /* event argument */
union {
int val; /* second argument of the event. */
int fd; /* file descriptor in case of read/write. */
struct timeval sands; /* rest of time sands value. */
} u;
RUSAGE_T ru; /* Indepth usage info. */
};
/* Thread types. */
#define THREAD_READ 0
#define THREAD_WRITE 1
#define THREAD_TIMER 2
#define THREAD_EVENT 3
#define THREAD_READY 4
#define THREAD_UNUSED 5
/* Thread yield time. */
#define THREAD_YIELD_TIME_SLOT 100 * 1000L /* 100ms */
/* Macros. */
#define THREAD_ARG(X) ((X)->arg)
#define THREAD_FD(X) ((X)->u.fd)
#define THREAD_VAL(X) ((X)->u.val)
#define THREAD_READ_ON(master,thread,func,arg,sock) \
do { \
if (! thread) \
thread = thread_add_read (master, func, arg, sock); \
} while (0)
#define THREAD_WRITE_ON(master,thread,func,arg,sock) \
do { \
if (! thread) \
thread = thread_add_write (master, func, arg, sock); \
} while (0)
#define THREAD_TIMER_ON(master,thread,func,arg,time) \
do { \
if (! thread) \
thread = thread_add_timer (master, func, arg, time); \
} while (0)
#define THREAD_OFF(thread) \
do { \
if (thread) \
{ \
thread_cancel (thread); \
thread = NULL; \
} \
} while (0)
#define THREAD_READ_OFF(thread) THREAD_OFF(thread)
#define THREAD_WRITE_OFF(thread) THREAD_OFF(thread)
#define THREAD_TIMER_OFF(thread) THREAD_OFF(thread)
/* Prototypes. */
struct thread_master *thread_master_create ();
struct thread *thread_add_read (struct thread_master *,
int (*)(struct thread *), void *, int);
struct thread *thread_add_write (struct thread_master *,
int (*)(struct thread *), void *, int);
struct thread *thread_add_timer (struct thread_master *,
int (*)(struct thread *), void *, long);
struct thread *thread_add_timer_msec (struct thread_master *,
int (*)(struct thread *), void *, long);
struct thread *thread_add_event (struct thread_master *,
int (*)(struct thread *), void *, int );
void thread_cancel (struct thread *);
void thread_cancel_event (struct thread_master *, void *);
struct thread *thread_fetch (struct thread_master *, struct thread *);
struct thread *thread_execute (struct thread_master *,
int (*)(struct thread *), void *, int);
void thread_call (struct thread *);
unsigned long thread_timer_remain_second (struct thread *);
#endif /* _ZEBRA_THREAD_H */
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