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/*
* Prototypes for malloc routines with failure handling.
*
* Copyright 2010 Board of Trustees, Leland Stanford Jr. University
* Copyright (c) 2004, 2005, 2006
* by Internet Systems Consortium, Inc. ("ISC")
* Copyright (c) 1991, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
* 2002, 2003 by The Internet Software Consortium and Rich Salz
*
* See LICENSE for licensing terms.
*/
#ifndef UTIL_XMALLOC_H
#define UTIL_XMALLOC_H 1
#include <config.h>
#include <portable/macros.h>
#include <sys/types.h>
/*
* The functions are actually macros so that we can pick up the file and line
* number information for debugging error messages without the user having to
* pass those in every time.
*/
#define xcalloc(n, size) x_calloc((n), (size), __FILE__, __LINE__)
#define xmalloc(size) x_malloc((size), __FILE__, __LINE__)
#define xrealloc(p, size) x_realloc((p), (size), __FILE__, __LINE__)
#define xstrdup(p) x_strdup((p), __FILE__, __LINE__)
#define xstrndup(p, size) x_strndup((p), (size), __FILE__, __LINE__)
#define xvasprintf(p, f, a) x_vasprintf((p), (f), (a), __FILE__, __LINE__)
/*
* asprintf is a special case since it takes variable arguments. If we have
* support for variadic macros, we can still pass in the file and line and
* just need to put them somewhere else in the argument list than last.
* Otherwise, just call x_asprintf directly. This means that the number of
* arguments x_asprintf takes must vary depending on whether variadic macros
* are supported.
*/
#ifdef HAVE_C99_VAMACROS
# define xasprintf(p, f, ...) \
x_asprintf((p), __FILE__, __LINE__, (f), __VA_ARGS__)
#elif HAVE_GNU_VAMACROS
# define xasprintf(p, f, args...) \
x_asprintf((p), __FILE__, __LINE__, (f), args)
#else
# define xasprintf x_asprintf
#endif
BEGIN_DECLS
/* Default to a hidden visibility for all util functions. */
#pragma GCC visibility push(hidden)
/*
* Last two arguments are always file and line number. These are internal
* implementations that should not be called directly.
*/
void *x_calloc(size_t, size_t, const char *, int)
__attribute__((__alloc_size__(1, 2), __malloc__, __nonnull__));
void *x_malloc(size_t, const char *, int)
__attribute__((__alloc_size__(1), __malloc__, __nonnull__));
void *x_realloc(void *, size_t, const char *, int)
__attribute__((__alloc_size__(2), __malloc__, __nonnull__(3)));
char *x_strdup(const char *, const char *, int)
__attribute__((__malloc__, __nonnull__));
char *x_strndup(const char *, size_t, const char *, int)
__attribute__((__malloc__, __nonnull__));
int x_vasprintf(char **, const char *, va_list, const char *, int)
__attribute__((__nonnull__));
/* asprintf special case. */
#if HAVE_C99_VAMACROS || HAVE_GNU_VAMACROS
int x_asprintf(char **, const char *, int, const char *, ...)
__attribute__((__nonnull__, __format__(printf, 4, 5)));
#else
int x_asprintf(char **, const char *, ...)
__attribute__((__nonnull__, __format__(printf, 2, 3)));
#endif
/* Failure handler takes the function, the size, the file, and the line. */
typedef void (*xmalloc_handler_type)(const char *, size_t, const char *, int);
/* The default error handler. */
void xmalloc_fail(const char *, size_t, const char *, int)
__attribute__((__nonnull__));
/*
* Assign to this variable to choose a handler other than the default, which
* just calls sysdie.
*/
extern xmalloc_handler_type xmalloc_error_handler;
/* Undo default visibility change. */
#pragma GCC visibility pop
END_DECLS
#endif /* UTIL_XMALLOC_H */
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