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/* libguestfs
* Copyright (C) 2009 Red Hat Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <guestfs.h>
#include <caml/config.h>
#include <caml/alloc.h>
#include <caml/callback.h>
#include <caml/custom.h>
#include <caml/fail.h>
#include <caml/memory.h>
#include <caml/mlvalues.h>
#include "guestfs_c.h"
/* This macro was added in OCaml 3.10. Backport for earlier versions. */
#ifndef CAMLreturnT
#define CAMLreturnT(type, result) do{ \
type caml__temp_result = (result); \
caml_local_roots = caml__frame; \
return (caml__temp_result); \
}while(0)
#endif
/* Allocate handles and deal with finalization. */
static void
guestfs_finalize (value gv)
{
guestfs_h *g = Guestfs_val (gv);
if (g) guestfs_close (g);
}
static struct custom_operations guestfs_custom_operations = {
"guestfs_custom_operations",
guestfs_finalize,
custom_compare_default,
custom_hash_default,
custom_serialize_default,
custom_deserialize_default
};
static value
Val_guestfs (guestfs_h *g)
{
CAMLparam0 ();
CAMLlocal1 (rv);
rv = caml_alloc_custom (&guestfs_custom_operations,
sizeof (guestfs_h *), 0, 1);
Guestfs_val (rv) = g;
CAMLreturn (rv);
}
void
ocaml_guestfs_raise_error (guestfs_h *g, const char *func)
{
CAMLparam0 ();
CAMLlocal1 (v);
const char *msg;
msg = guestfs_last_error (g);
if (msg)
v = caml_copy_string (msg);
else
v = caml_copy_string (func);
caml_raise_with_arg (*caml_named_value ("ocaml_guestfs_error"), v);
CAMLnoreturn;
}
/* Guestfs.create */
CAMLprim value
ocaml_guestfs_create (void)
{
CAMLparam0 ();
CAMLlocal1 (gv);
guestfs_h *g;
g = guestfs_create ();
if (g == NULL)
caml_failwith ("failed to create guestfs handle");
guestfs_set_error_handler (g, NULL, NULL);
gv = Val_guestfs (g);
CAMLreturn (gv);
}
/* Guestfs.close */
CAMLprim value
ocaml_guestfs_close (value gv)
{
CAMLparam1 (gv);
guestfs_finalize (gv);
/* So we don't double-free in the finalizer. */
Guestfs_val (gv) = NULL;
CAMLreturn (Val_unit);
}
/* Copy string array value.
* The return value is only 'safe' provided we don't allocate anything
* further on the OCaml heap (ie. cannot trigger the OCaml GC) because
* that could move the strings around.
*/
char **
ocaml_guestfs_strings_val (guestfs_h *g, value sv)
{
CAMLparam1 (sv);
char **r;
unsigned int i;
r = guestfs_safe_malloc (g, sizeof (char *) * (Wosize_val (sv) + 1));
for (i = 0; i < Wosize_val (sv); ++i)
r[i] = String_val (Field (sv, i));
r[i] = NULL;
CAMLreturnT (char **, r);
}
/* Free array of strings. */
void
ocaml_guestfs_free_strings (char **argv)
{
/* Don't free the actual strings - they are String_vals on
* the OCaml heap.
*/
free (argv);
}
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