ancillaries.h

/*
 * Copyright (C) 2014 Philippe Gerum <rpm@xenomai.org>.
 *
 * Xenomai 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.
 *
 * Xenomai 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 Xenomai; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 */
#ifndef _COBALT_KERNEL_ANCILLARIES_H
#define _COBALT_KERNEL_ANCILLARIES_H
 
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/uidgid.h>
#include <cobalt/uapi/kernel/limits.h>
 
#define ksformat(__dst, __len, __fmt, __args...)                        \
        ({                                                              \
                size_t __ret;                                           \
                __ret = snprintf(__dst, __len, __fmt, ##__args);        \
                if (__ret >= __len)                                     \
                        __dst[__len-1] = '\0';                          \
                __ret;                                                  \
        })
 
#define kasformat(__fmt, __args...)                                     \
        ({                                                              \
                kasprintf(GFP_KERNEL, __fmt, ##__args);                 \
        })
 
#define kvsformat(__dst, __len, __fmt, __ap)                            \
        ({                                                              \
                size_t __ret;                                           \
                __ret = vsnprintf(__dst, __len, __fmt, __ap);           \
                if (__ret >= __len)                                     \
                        __dst[__len-1] = '\0';                          \
                __ret;                                                  \
        })
 
#define kvasformat(__fmt, __ap)                                         \
        ({                                                              \
                kvasprintf(GFP_KERNEL, __fmt, __ap);                    \
        })
 
void __knamecpy_requires_character_array_as_destination(void);
 
#define knamecpy(__dst, __src)                                          \
        ({                                                              \
                if (!__builtin_types_compatible_p(typeof(__dst), char[])) \
                        __knamecpy_requires_character_array_as_destination();   \
                strncpy((__dst), __src, sizeof(__dst));                 \
                __dst[sizeof(__dst) - 1] = '\0';                        \
                __dst;                                                  \
         })
 
#define get_current_uuid() from_kuid_munged(current_user_ns(), current_uid())
 
#endif /* !_COBALT_KERNEL_ANCILLARIES_H */