60da9d9559
The memory-allocation wrappers are simple things to allow malloc interposition: they are only used inconsistently at present, usually where malloc debugging was required in the past. These provide a default implementation that is environment-variable triggered (initialized on the first call to the libctf creation and file-opening functions, the first functions people will use), and a ctf_setdebug()/ctf_getdebug() pair that allows the caller to explicitly turn debugging off and on. If ctf_setdebug() is called, the automatic setting from an environment variable is skipped. libctf/ * ctf-impl.h: New file. * ctf-subr.c: New file. include/ * ctf-api.h (ctf_setdebug): New. (ctf_getdebug): Likewise.
79 lines
2.3 KiB
C
79 lines
2.3 KiB
C
/* Implementation header.
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Copyright (C) 2019 Free Software Foundation, Inc.
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This file is part of libctf.
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libctf is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING. If not see
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<http://www.gnu.org/licenses/>. */
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#ifndef _CTF_IMPL_H
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#define _CTF_IMPL_H
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#include "config.h"
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#include <sys/errno.h>
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#include <ctf-api.h>
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#include <sys/types.h>
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/* Compiler attributes. */
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#if defined (__GNUC__)
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/* GCC. We assume that all compilers claiming to be GCC support sufficiently
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many GCC attributes that the code below works. If some non-GCC compilers
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masquerading as GCC in fact do not implement these attributes, version checks
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may be required. */
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/* We use the _libctf_*_ pattern to avoid clashes with any future attribute
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macros glibc may introduce, which have names of the pattern
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__attribute_blah__. */
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#define _libctf_printflike_(string_index,first_to_check) \
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__attribute__ ((__format__ (__printf__, (string_index), (first_to_check))))
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#define _libctf_unlikely_(x) __builtin_expect ((x), 0)
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#define _libctf_unused_ __attribute__ ((__unused__))
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#define _libctf_malloc_ __attribute__((__malloc__))
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#endif
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_libctf_malloc_
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extern void *ctf_data_alloc (size_t);
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extern void ctf_data_free (void *, size_t);
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extern void ctf_data_protect (void *, size_t);
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_libctf_malloc_
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extern void *ctf_mmap (size_t length, size_t offset, int fd);
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extern void ctf_munmap (void *, size_t);
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extern ssize_t ctf_pread (int fd, void *buf, ssize_t count, off_t offset);
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_libctf_malloc_
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extern void *ctf_alloc (size_t);
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extern void ctf_free (void *);
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_libctf_printflike_ (1, 2)
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extern void ctf_dprintf (const char *, ...);
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extern void libctf_init_debug (void);
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extern int _libctf_debug; /* debugging messages enabled */
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#ifdef __cplusplus
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}
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#endif
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#endif /* _CTF_IMPL_H */
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