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/* $Id$ */
/* Copyright (C) 1998-99 Martin Baulig
This file is part of LibGTop 1.0.
Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.
LibGTop 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.
LibGTop 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 LibGTop; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#include <glibtop/read.h>
#include <glibtop/write.h>
#include <glibtop/read_data.h>
#include <glibtop/command.h>
#include <glibtop/xmalloc.h>
void *
glibtop_call_l (glibtop *server, unsigned command, size_t send_size,
const void *send_buf, size_t recv_size, void *recv_buf,
int *retval_ptr)
{
glibtop_command cmnd;
glibtop_response response;
int retval;
glibtop_init_r (&server, 0, 0);
memset (&cmnd, 0, sizeof (glibtop_command));
cmnd.command = command;
/* If send_size is less than _GLIBTOP_PARAM_SIZE (normally 16 Bytes), we
* send it together with command, so we only need one system call instead
* of two. */
if (send_size <= _GLIBTOP_PARAM_SIZE) {
memcpy (cmnd.parameter, send_buf, send_size);
cmnd.size = send_size;
} else {
cmnd.data_size = send_size;
}
glibtop_write_l (server, sizeof (glibtop_command), &cmnd);
glibtop_read_l (server, sizeof (glibtop_response), &response);
#ifdef DEBUG
fprintf (stderr, "RESPONSE: %lu - %d\n",
response.offset, response.data_size);
#endif
glibtop_read_l (server, sizeof (int), &retval);
if (retval_ptr)
*retval_ptr = retval;
if (recv_buf)
memcpy (recv_buf, ((char *) &response) + response.offset,
recv_size);
if (response.data_size) {
void *ptr = glibtop_malloc_r (server, response.data_size);
glibtop_read_l (server, response.data_size, ptr);
return ptr;
}
return NULL;
}
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