go-nbdkit/utils.go

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2020-09-28 20:00:36 +00:00
/* cgo wrappers.
* Copyright (C) 2013-2020 Red Hat Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * 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 distribution.
*
* * Neither the name of Red Hat nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
package nbdkit
/*
#cgo LDFLAGS: -lnbdkit
#define NBDKIT_API_VERSION 2
#include <nbdkit-plugin.h>
// cgo cannot call varargs functions.
void
_nbdkit_debug (const char *s)
{
nbdkit_debug ("%s", s);
}
// cgo cannot call varargs functions.
void
_nbdkit_error (const char *s)
{
nbdkit_error ("%s", s);
}
*/
import "C"
import "syscall"
// Utility functions.
func Debug(s string) {
C._nbdkit_debug(C.CString(s))
}
// This function is provided but plugins would rarely need to call
// this explicitly since returning an error from a plugin callback
// will call it implicitly.
func Error(s string) {
C._nbdkit_error(C.CString(s))
}
// Same applies as for Error(). Callers should not usually need to
// call this.
func SetError(err syscall.Errno) {
C.nbdkit_set_error(C.int(err))
}