pthreads.c

来自「这个是LINUX下的GDB调度工具的源码」· C语言 代码 · 共 174 行

/* Pthreads test program.
   Copyright 1996, 2002, 2003, 2004
   Free Software Foundation, Inc.

   Written by Fred Fish of Cygnus Support
   Contributed by Cygnus Support

   This file is part of GDB.

   This program 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 of the License, or
   (at your option) any later version.
   
   This program 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 this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>

/* Under OSF 2.0 & 3.0 and HPUX 10, the second arg of pthread_create
   is prototyped to be just a "pthread_attr_t", while under Solaris it
   is a "pthread_attr_t *".  Arg! */

#if defined (__osf__) || defined (__hpux__)
#define PTHREAD_CREATE_ARG2(arg) arg
#define PTHREAD_CREATE_NULL_ARG2 null_attr
static pthread_attr_t null_attr;
#else
#define PTHREAD_CREATE_ARG2(arg) &arg
#define PTHREAD_CREATE_NULL_ARG2 NULL
#endif

static int verbose = 0;

static void
common_routine (arg)
     int arg;
{
  static int from_thread1;
  static int from_thread2;
  static int from_main;
  static int hits;
  static int full_coverage;

  if (verbose) printf("common_routine (%d)\n", arg);
  hits++;
  switch (arg)
    {
    case 0:
      from_main++;
      break;
    case 1:
      from_thread1++;
      break;
    case 2:
      from_thread2++;
      break;
    }
  if (from_main && from_thread1 && from_thread2)
    full_coverage = 1;
}

static void *
thread1 (void *arg)
{
  int i;
  int z = 0;

  if (verbose) printf ("thread1 (%0x) ; pid = %d\n", arg, getpid ());
  for (i=1; i <= 10000000; i++)
    {
      if (verbose) printf("thread1 %d\n", pthread_self ());
      z += i;
      common_routine (1);
      sleep(1);
    }
  return (void *) 0;
}

static void *
thread2 (void * arg)
{
  int i;
  int k = 0;

  if (verbose) printf ("thread2 (%0x) ; pid = %d\n", arg, getpid ());
  for (i=1; i <= 10000000; i++)
    {
      if (verbose) printf("thread2 %d\n", pthread_self ());
      k += i;
      common_routine (2);
      sleep(1);
    }
  sleep(100);
  return (void *) 0;
}

void
foo (a, b, c)
     int a, b, c;
{
  int d, e, f;

  if (verbose) printf("a=%d\n", a);
}

main(argc, argv)
     int argc;
     char **argv;
{
  pthread_t tid1, tid2;
  int j;
  int t = 0;
  void (*xxx) ();
  pthread_attr_t attr;

  if (verbose) printf ("pid = %d\n", getpid());

  foo (1, 2, 3);

#ifndef __osf__
  if (pthread_attr_init (&attr))
    {
      perror ("pthread_attr_init 1");
      exit (1);
    }
#endif

#ifdef PTHREAD_SCOPE_SYSTEM
  if (pthread_attr_setscope (&attr, PTHREAD_SCOPE_SYSTEM))
    {
      perror ("pthread_attr_setscope 1");
      exit (1);
    }
#endif

  if (pthread_create (&tid1, PTHREAD_CREATE_ARG2(attr), thread1, (void *) 0xfeedface))
    {
      perror ("pthread_create 1");
      exit (1);
    }
  if (verbose) printf ("Made thread %d\n", tid1);
  sleep (1);

  if (pthread_create (&tid2, PTHREAD_CREATE_NULL_ARG2, thread2, (void *) 0xdeadbeef))
    {
      perror ("pthread_create 2");
      exit (1);
    }
  if (verbose) printf("Made thread %d\n", tid2);

  sleep (1);

  for (j = 1; j <= 10000000; j++)
    {
      if (verbose) printf("top %d\n", pthread_self ());
      common_routine (0);
      sleep(1);
      t += j;
    }
  
  exit(0);
}