gearman/libhostile/close.c

/*  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
 *
 *  Data Differential's libhostle
 *
 *  Copyright (C) 2013 Data Differential, http://datadifferential.com/
 *
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 *  modification, are permitted provided that the following conditions are
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 *  notice, this list of conditions and the following disclaimer.
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 *      * Redistributions in binary form must reproduce the above
 *  copyright notice, this list of conditions and the following disclaimer
 *  in the documentation and/or other materials provided with the
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 *  promote products derived from this software without specific prior
 *  written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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 *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 */

#include "gear_config.h"

#include <libhostile/function.h>
#include <libhostile/initialize.h>

#include <assert.h>
#include <errno.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>

static int not_until= 500;

static struct function_st __function;

static pthread_once_t function_lookup_once = PTHREAD_ONCE_INIT;
static void set_local(void)
{
  __function= set_function("close", "HOSTILE_CLOSE");
}

int close(int fd_)
{

  hostile_initialize();

  (void) pthread_once(&function_lookup_once, set_local);

  if (is_called() == false && __function.frequency)
  {
    if (false)
    { }
    else if (--not_until < 0 && rand() % __function.frequency)
    {
      __function._used++;
      errno= EIO;
      return -1;
    }
  }

  set_called();
  int ret= __function.function.close(fd_);
  reset_called();

  return ret;
}