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/*
* stdinc.h
* pull in standard headers (including portability hacks)
*
* Copyright (c) 2012 pkgconf authors (see AUTHORS).
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* This software is provided 'as is' and without any warranty, express or
* implied. In no event shall the authors be liable for any damages arising
* from the use of this software.
*/
#ifndef __STDINC_H
#define __STDINC_H
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <stdbool.h>
#include <stdarg.h>
#include <string.h>
#include <sys/types.h>
#include <stdint.h>
/*
* The original libpkgconf package uses PKGCONF_BUFSIZE size for all
* stack-allocated buffers, imposing high requirements for the thread stack
* size. This make it unusable on MacOS (as of 10.12) for non-main threads that
* are created with the default 512KB stack size. In particular that make it
* impossible to use libpkgconf API in threads created with C++11 std::thread
* class, that doesn't allow stack size customization.
*
* As an example, using pkgconf_pkg_find() for quite a simple .pc file consumes
* at least 460KB. The measurement was made as a difference between addresses
* of 2 stack-allocated variables: one was defined right before the function
* call, another right after the buffer definition in pkgconf_tuple_parse()
* function.
*
* To relax the stack size requirements we will minimize the usage of
* PKGCONF_BUFSIZE, inventing the smaller PKGCONF_ITEM_SIZE, and using it
* wherever it is possible instead. The PKGCONF_ITEM_SIZE is selected in such a
* way that a buffer of this size can accommodate the file system path, the
* value fragment, the variable name or the package dependency specification.
* The latest implies it also fits for the package key or the package version.
* This optimization decreased the stack usage for the described use case to
* 140KB.
*
* Issue #149 is reported.
*/
#ifdef _WIN32
# define WIN32_LEAN_AND_MEAN
# include <windows.h>
# include <malloc.h>
# define PATH_DEV_NULL "nul"
# ifdef _WIN64
# define SIZE_FMT_SPECIFIER "%I64u"
# else
# define SIZE_FMT_SPECIFIER "%u"
# endif
# ifndef ssize_t
# ifndef __MINGW32__
# include <BaseTsd.h>
# else
# include <basetsd.h>
# endif
# define ssize_t SSIZE_T
# endif
# ifndef __MINGW32__
# include "win-dirent.h"
# else
# include <dirent.h>
# endif
# define PKGCONF_ITEM_SIZE (_MAX_PATH + 1024)
#else
# define PATH_DEV_NULL "/dev/null"
# define SIZE_FMT_SPECIFIER "%zu"
# include <dirent.h>
# include <unistd.h>
# include <limits.h>
# ifdef PATH_MAX
# define PKGCONF_ITEM_SIZE (PATH_MAX + 1024)
# else
# define PKGCONF_ITEM_SIZE (4096 + 1024)
# endif
#endif
#endif
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