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LibretroAdmin
2323f96cf4
Every file the core touches goes through libretro-common's filestream, path and dirent layers, taken from RetroArch: vfs_hybrid opens local paths with libretro-common's own implementation and hands URI paths (and, on Android, anything a local open cannot reach) to the frontend's VFS. File::IOFile and File::DirectIOFile sit on RFILE, and FileUtil, FileSearch and the directory walks on path_stat, path_mkdir and retro_opendir. Dolphin's fopen, POSIX and Win32 file code, std::filesystem and std::fstream are gone, with the dual VFS paths and the core option that chose between them. Files opened for reading alone are memory-mapped where the platform can: reads copy straight out of the page cache, DirectIOFile's offset reads on one mapped object are thread safe, and GetMappedPtr(), View() and Prefetch() lend and warm without a copy. Text files are read a line at a time through File::LineReader, lent from the mapping or a window refilled a block at a time, never a byte at a time; JSON is parsed straight from the mapping. Ini files and the cheat file are built in memory and written once, an ini only when it changed and then atomically.
66 lines
2.8 KiB
C
66 lines
2.8 KiB
C
/* Copyright (C) 2010-2020 The RetroArch team
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*
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* ---------------------------------------------------------------------------------------
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* The following license statement only applies to this file (retro_posix_source.h).
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* ---------------------------------------------------------------------------------------
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*
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* Permission is hereby granted, free of charge,
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* to any person obtaining a copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef __LIBRETRO_SDK_POSIX_SOURCE_H
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#define __LIBRETRO_SDK_POSIX_SOURCE_H
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/* The feature profile these sources are written against: strdup(),
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* strcasecmp(), fstatat(), O_CLOEXEC, M_PI, sigaltstack() and syscall()
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* all sit behind __USE_XOPEN2K8 or __USE_MISC, and a consumer is free to
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* build the library under a stricter profile than the default -- the
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* Debian/Launchpad core packaging passes -D_XOPEN_SOURCE=600.
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*
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* MUST BE THE FIRST INCLUDE: a libc settles what its headers expose when
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* the first of them is seen.
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*
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* The guards only raise the profile, and ask for what a build passing no
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* feature macros already gets, so nothing this library selects changes.
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* Linux only: elsewhere _POSIX_C_SOURCE would instead hide extensions
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* these sources use. */
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/* Opt-in, because a unity build reaches its second file with system
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* headers already in scope, where these macros are inert rather than
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* wrong. __GLIBC__ arrives from <features.h>. */
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#if defined(RETRO_POSIX_SOURCE_CHECK_ORDER) && defined(__GLIBC__)
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#error "retro_posix_source.h must be included before any system header"
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#endif
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#if defined(__linux__) && !defined(_GNU_SOURCE)
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#if !defined(_POSIX_C_SOURCE) || (_POSIX_C_SOURCE - 0) < 200809L
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#undef _POSIX_C_SOURCE
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#define _POSIX_C_SOURCE 200809L
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#endif
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#if defined(_XOPEN_SOURCE) && (_XOPEN_SOURCE - 0) < 700
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#undef _XOPEN_SOURCE
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#define _XOPEN_SOURCE 700
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#endif
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#ifndef _DEFAULT_SOURCE
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#define _DEFAULT_SOURCE 1
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#endif
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#endif
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#endif
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