vmdsock.h File Reference

Go to the source code of this file.

Functions
int	vmdsock_init (void)
void *	vmdsock_create (void)
int	vmdsock_bind (void *, int)
int	vmdsock_listen (void *)
void *	vmdsock_accept (void *)
int	vmdsock_connect (void *, const char *, int)
int	vmdsock_write (void *, const void *, int)
int	vmdsock_read (void *, void *, int)
int	vmdsock_selread (void *, int)
int	vmdsock_selwrite (void *, int)
void	vmdsock_destroy (void *)

Function Documentation

void* vmdsock_accept

(

void *

)

Definition at line 128 of file vmdsock.C.

Referenced by GlobalMasterIMD::calculate().

                               {
  int rc;
  vmdsocket *new_s = NULL, *s = (vmdsocket *) v;
  socklen_t len;

  len = sizeof(s->addr);
  rc = accept(s->sd, (struct sockaddr *) &s->addr, &len);
  if (rc >= 0) {
    new_s = (vmdsocket *) malloc(sizeof(vmdsocket));
    if (new_s != NULL) {
      *new_s = *s;
      new_s->sd = rc;
    }
  }
  return (void *)new_s;
}

int vmdsock_bind	(	void *	,
		int
	)

Definition at line 114 of file vmdsock.C.

Referenced by find_free_port().

                                     {
  vmdsocket *s = (vmdsocket *) v;
  memset(&(s->addr), 0, sizeof(s->addr)); 
  s->addr.sin_family = PF_INET;
  s->addr.sin_port = htons(port);

  return bind(s->sd, (struct sockaddr *) &s->addr, sizeof(s->addr));
}

int vmdsock_connect	(	void *	,
		const char *	,
		int
	)

Definition at line 92 of file vmdsock.C.

                                                          {
  vmdsocket *s = (vmdsocket *) v;
  char address[1030];
  struct hostent *h;

  h=gethostbyname(host);
  if (h == NULL) 
    return -1;
  sprintf(address, "%d.%d.%d.%d",
    (unsigned char) h->h_addr_list[0][0],
    (unsigned char) h->h_addr_list[0][1],
    (unsigned char) h->h_addr_list[0][2],
    (unsigned char) h->h_addr_list[0][3]);

  memset(&(s->addr), 0, sizeof(s->addr)); 
  s->addr.sin_family = PF_INET;
  s->addr.sin_addr.s_addr = inet_addr(address);
  s->addr.sin_port = htons(port);  

  return connect(s->sd, (struct sockaddr *) &s->addr, sizeof(s->addr)); 
}

void* vmdsock_create

(

void

)

Definition at line 76 of file vmdsock.C.

Referenced by GlobalMasterIMD::GlobalMasterIMD().

                            {
  vmdsocket * s;

  s = (vmdsocket *) malloc(sizeof(vmdsocket));
  if (s != NULL)
    memset(s, 0, sizeof(vmdsocket)); 

  if ((s->sd = socket(PF_INET, SOCK_STREAM, 0)) == -1) {
    printf("Failed to open socket.");
    free(s);
    return NULL;
  }

  return (void *) s;
}

void vmdsock_destroy

(

void *

)

Definition at line 164 of file vmdsock.C.

Referenced by GlobalMasterIMD::calculate(), GlobalMasterIMD::get_vmd_forces(), GlobalMasterIMD::GlobalMasterIMD(), and GlobalMasterIMD::~GlobalMasterIMD().

                               {
  vmdsocket * s = (vmdsocket *) v;
  if (s == NULL)
    return;

#if defined(WIN32) && !defined(__CYGWIN__)
  closesocket(s->sd);
#else
  close(s->sd);
#endif
  free(s);  
}

int vmdsock_init

(

void

)

Copyright (c) 1995, 1996, 1997, 1998, 1999, 2000 by The Board of Trustees of the University of Illinois. All rights reserved.

Definition at line 52 of file vmdsock.C.

Referenced by GlobalMasterIMD::GlobalMasterIMD().

                       {
#if defined(WIN32) && !defined(__CYGWIN__)
  int rc = 0;

/*
** XXX static and global variables are unsafe for shared memory builds.
** The global and static vars should be eliminated.
*/
  static int initialized=0;

  if (!initialized) {
    WSADATA wsdata;
    rc = WSAStartup(MAKEWORD(1,1), &wsdata);
    if (rc == 0)
      initialized = 1;
  }

  return rc;
#else   
  return 0;
#endif
}

int vmdsock_listen

(

void *

)

Definition at line 123 of file vmdsock.C.

Referenced by GlobalMasterIMD::GlobalMasterIMD().

                             {
  vmdsocket *s = (vmdsocket *) v;
  return listen(s->sd, 5);
}

int vmdsock_read	(	void *	,
		void *	,
		int
	)

Definition at line 154 of file vmdsock.C.

Referenced by imd_readn().

                                                {
  vmdsocket *s = (vmdsocket *) v;
#if defined(WIN32) && !defined(__CYGWIN__)
  return recv(s->sd, (char*) buf, len, 0); // windows lacks the read() call
#else
  return read(s->sd, buf, len);
#endif

}

int vmdsock_selread	(	void *	,
		int
	)

Definition at line 177 of file vmdsock.C.

Referenced by GlobalMasterIMD::calculate(), GlobalMasterIMD::get_vmd_forces(), imd_recv_handshake(), and my_imd_connect().

                                      {
  vmdsocket *s = (vmdsocket *)v;
  fd_set rfd;
  struct timeval tv;
  int rc;
 
  FD_ZERO(&rfd);
  FD_SET(s->sd, &rfd);
  memset((void *)&tv, 0, sizeof(struct timeval));
  tv.tv_sec = sec;
  do {
    rc = select(s->sd+1, &rfd, NULL, NULL, &tv);
  } while (rc < 0 && errno == EINTR);
  return rc;

}

int vmdsock_selwrite	(	void *	,
		int
	)

Definition at line 194 of file vmdsock.C.

Referenced by GlobalMasterIMD::send_energies(), and GlobalMasterIMD::send_fcoords().

                                       {
  vmdsocket *s = (vmdsocket *)v;
  fd_set wfd;
  struct timeval tv;
  int rc;
 
  FD_ZERO(&wfd);
  FD_SET(s->sd, &wfd);
  memset((void *)&tv, 0, sizeof(struct timeval));
  tv.tv_sec = sec;
  do {
    rc = select(s->sd + 1, NULL, &wfd, NULL, &tv);
  } while (rc < 0 && errno == EINTR);
  return rc;
}

int vmdsock_write	(	void *	,
		const void *	,
		int
	)

Definition at line 145 of file vmdsock.C.

Referenced by imd_writen().

                                                       {
  vmdsocket *s = (vmdsocket *) v;
#if defined(WIN32) && !defined(__CYGWIN__)
  return send(s->sd, (const char*) buf, len, 0);  // windows lacks the write() call
#else
  return write(s->sd, buf, len);
#endif
}