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8cc4198f9f
* (general) extern and static'ification of functions in code and header. Cleanup any definitions with unspecified arguments. Add casts for callback assignments where the callback is defined, typically, as passing void *, but the function being assigned has some other pointer type defined as its argument, as gcc complains about casts from void * to X* via function arguments. Fix some old K&R style function argument definitions. Add noreturn gcc attribute to some functions, as appropriate. Add unused gcc attribute to some functions (eg ones meant to help while debugging) Add guard defines to headers which were missing them. * command.c: (install_node) add const qualifier, still doesnt shut up the warning though, because of the double pointer. (cmp_node) ditto * keychain.c: (key_str2time) Add GET_LONG_RANGE() macro, derived fromn vty.h ones to fix some of the (long) < 0 warnings. * thread.c: (various) use thread_empty (cpu_record_hash_key) should cast to uintptr_t, a stdint.h type * vty.h: Add VTY_GET_IPV4_ADDRESS and VTY_GET_IPV4_PREFIX so they removed from ospfd/ospf_vty.h * zebra.h: Move definition of ZEBRA_PORT to here, to remove dependence of lib on zebra/zserv.h
206 lines
6.7 KiB
C
206 lines
6.7 KiB
C
/* Thread management routine header.
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* Copyright (C) 1998 Kunihiro Ishiguro
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*
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* This file is part of GNU Zebra.
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*
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* GNU Zebra is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* GNU Zebra is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Zebra; see the file COPYING. If not, write to the Free
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* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*/
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#ifndef _ZEBRA_THREAD_H
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#define _ZEBRA_THREAD_H
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struct rusage_t
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{
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#ifdef HAVE_RUSAGE
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struct rusage cpu;
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#endif
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struct timeval real;
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};
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#define RUSAGE_T struct rusage_t
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#ifdef HAVE_RUSAGE
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#define GETRUSAGE(X) \
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getrusage(RUSAGE_SELF, &((X)->cpu)); \
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gettimeofday(&recent_time, NULL); (X)->real = recent_time
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#else
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#define GETRUSAGE(X) \
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gettimeofday(&recent_time, NULL); (X)->real = recent_time
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#endif /* HAVE_RUSAGE */
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/* Linked list of thread. */
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struct thread_list
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{
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struct thread *head;
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struct thread *tail;
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int count;
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};
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/* Master of the theads. */
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struct thread_master
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{
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struct thread_list read;
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struct thread_list write;
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struct thread_list timer;
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struct thread_list event;
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struct thread_list ready;
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struct thread_list unuse;
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struct thread_list background;
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fd_set readfd;
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fd_set writefd;
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fd_set exceptfd;
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unsigned long alloc;
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};
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/* Thread itself. */
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struct thread
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{
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unsigned char type; /* thread type */
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unsigned char add_type; /* thread type */
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struct thread *next; /* next pointer of the thread */
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struct thread *prev; /* previous pointer of the thread */
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struct thread_master *master; /* pointer to the struct thread_master. */
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int (*func) (struct thread *); /* event function */
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void *arg; /* event argument */
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union {
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int val; /* second argument of the event. */
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int fd; /* file descriptor in case of read/write. */
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struct timeval sands; /* rest of time sands value. */
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} u;
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RUSAGE_T ru; /* Indepth usage info. */
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char* funcname;
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};
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struct cpu_thread_history
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{
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int (*func)(struct thread *);
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const char *funcname;
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unsigned int total_calls;
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struct time_stats
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{
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unsigned long total, max;
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} real;
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#ifdef HAVE_RUSAGE
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struct time_stats cpu;
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#endif
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unsigned char types;
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};
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/* Thread types. */
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#define THREAD_READ 0
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#define THREAD_WRITE 1
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#define THREAD_TIMER 2
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#define THREAD_EVENT 3
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#define THREAD_READY 4
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#define THREAD_BACKGROUND 5
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#define THREAD_UNUSED 6
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#define THREAD_EXECUTE 7
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/* Thread yield time. */
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#define THREAD_YIELD_TIME_SLOT 10 * 1000L /* 10ms */
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/* Macros. */
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#define THREAD_ARG(X) ((X)->arg)
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#define THREAD_FD(X) ((X)->u.fd)
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#define THREAD_VAL(X) ((X)->u.val)
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#define THREAD_READ_ON(master,thread,func,arg,sock) \
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do { \
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if (! thread) \
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thread = thread_add_read (master, func, arg, sock); \
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} while (0)
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#define THREAD_WRITE_ON(master,thread,func,arg,sock) \
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do { \
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if (! thread) \
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thread = thread_add_write (master, func, arg, sock); \
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} while (0)
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#define THREAD_TIMER_ON(master,thread,func,arg,time) \
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do { \
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if (! thread) \
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thread = thread_add_timer (master, func, arg, time); \
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} while (0)
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#define THREAD_OFF(thread) \
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do { \
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if (thread) \
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{ \
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thread_cancel (thread); \
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thread = NULL; \
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} \
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} while (0)
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#define THREAD_READ_OFF(thread) THREAD_OFF(thread)
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#define THREAD_WRITE_OFF(thread) THREAD_OFF(thread)
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#define THREAD_TIMER_OFF(thread) THREAD_OFF(thread)
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#define thread_add_read(m,f,a,v) funcname_thread_add_read(m,f,a,v,#f)
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#define thread_add_write(m,f,a,v) funcname_thread_add_write(m,f,a,v,#f)
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#define thread_add_timer(m,f,a,v) funcname_thread_add_timer(m,f,a,v,#f)
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#define thread_add_timer_msec(m,f,a,v) funcname_thread_add_timer_msec(m,f,a,v,#f)
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#define thread_add_event(m,f,a,v) funcname_thread_add_event(m,f,a,v,#f)
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#define thread_execute(m,f,a,v) funcname_thread_execute(m,f,a,v,#f)
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/* The 4th arg to thread_add_background is the # of milliseconds to delay. */
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#define thread_add_background(m,f,a,v) funcname_thread_add_background(m,f,a,v,#f)
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/* Prototypes. */
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extern struct thread_master *thread_master_create (void);
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extern void thread_master_free (struct thread_master *);
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extern struct thread *funcname_thread_add_read (struct thread_master *,
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int (*)(struct thread *),
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void *, int, const char*);
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extern struct thread *funcname_thread_add_write (struct thread_master *,
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int (*)(struct thread *),
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void *, int, const char*);
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extern struct thread *funcname_thread_add_timer (struct thread_master *,
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int (*)(struct thread *),
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void *, long, const char*);
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extern struct thread *funcname_thread_add_timer_msec (struct thread_master *,
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int (*)(struct thread *),
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void *, long, const char*);
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extern struct thread *funcname_thread_add_event (struct thread_master *,
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int (*)(struct thread *),
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void *, int, const char*);
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extern struct thread *funcname_thread_add_background (struct thread_master *,
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int (*func)(struct thread *),
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void *arg,
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long milliseconds_to_delay,
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const char *funcname);
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extern struct thread *funcname_thread_execute (struct thread_master *,
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int (*)(struct thread *),
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void *, int, const char *);
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extern void thread_cancel (struct thread *);
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extern void thread_cancel_event (struct thread_master *, void *);
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extern struct thread *thread_fetch (struct thread_master *, struct thread *);
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extern void thread_call (struct thread *);
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extern unsigned long thread_timer_remain_second (struct thread *);
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extern int thread_should_yield (struct thread *);
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extern struct cmd_element show_thread_cpu_cmd;
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/* Returns elapsed real (wall clock) time. */
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extern unsigned long thread_consumed_time(RUSAGE_T *after, RUSAGE_T *before,
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unsigned long *cpu_time_elapsed);
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/* Global variable containing a recent result from gettimeofday. This can
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be used instead of calling gettimeofday if a recent value is sufficient.
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This is guaranteed to be refreshed before a thread is called. */
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extern struct timeval recent_time;
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#endif /* _ZEBRA_THREAD_H */
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