654 lines
14 KiB
C++
Executable File
654 lines
14 KiB
C++
Executable File
// misc. POSIX routines for Win32
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//
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// Copyright (c) 2004 Jan Wassenberg
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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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. See the GNU
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// General Public License for more details.
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//
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// Contact info:
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// Jan.Wassenberg@stud.uni-karlsruhe.de
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// http://www.stud.uni-karlsruhe.de/~urkt/
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// collection of hacks :P
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#include "precompiled.h"
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#include "lib.h"
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#include "win_internal.h"
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#include <process.h>
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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static HANDLE mk_handle(intptr_t i)
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{
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// passing in -1 (e.g. if _get_osfhandle fails),
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// is fine, it ends up INVALID_HANDLE_VALUE.
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return (HANDLE)((char*)0 + i);
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}
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//////////////////////////////////////////////////////////////////////////////
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//
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// file
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//
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//////////////////////////////////////////////////////////////////////////////
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int open(const char* fn, int oflag, ...)
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{
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bool is_com_port = strncmp(fn, "/dev/tty", 8) == 0;
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// /dev/tty? => COM?
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if(is_com_port)
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{
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static char port[] = "COM ";
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port[3] = (char)(fn[8]+1);
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fn = port;
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}
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mode_t mode = 0;
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if(oflag & O_CREAT)
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{
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va_list args;
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va_start(args, oflag);
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mode = va_arg(args, mode_t);
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va_end(args);
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}
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WIN_SAVE_LAST_ERROR; // CreateFile
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int fd = _open(fn, oflag, mode);
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WIN_RESTORE_LAST_ERROR;
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#ifdef PARANOIA
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debug_out("open %s = %d\n", fn, fd);
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#endif
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// open it for async I/O as well (_open defaults to deny_none sharing)
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if(fd > 2)
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{
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// .. unless it's a COM port. don't currently need aio access for those;
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// also, aio_reopen's CreateFile reports access denied when trying to open.
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if(!is_com_port)
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aio_reopen(fd, fn, oflag);
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}
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// CRT doesn't like more than 255 files open.
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// warn now, so that we notice why so many are open
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if(fd > 256)
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debug_warn("wposix: too many files open (CRT limitation)");
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return fd;
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}
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int close(int fd)
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{
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#ifdef PARANOIA
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debug_out("close %d\n", fd);
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#endif
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assert(3 <= fd && fd < 256);
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aio_close(fd);
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return _close(fd);
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}
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int ioctl(int fd, int op, int* data)
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{
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const HANDLE h = mk_handle(_get_osfhandle(fd));
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switch(op)
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{
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case TIOCMGET:
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/* TIOCM_* mapped directly to MS_*_ON */
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GetCommModemStatus(h, (DWORD*)data);
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break;
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case TIOCMBIS:
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/* only RTS supported */
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if(*data & TIOCM_RTS)
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EscapeCommFunction(h, SETRTS);
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else
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EscapeCommFunction(h, CLRRTS);
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break;
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case TIOCMIWAIT:
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static DWORD mask;
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DWORD new_mask = 0;
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if(*data & TIOCM_CD)
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new_mask |= EV_RLSD;
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if(*data & TIOCM_CTS)
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new_mask |= EV_CTS;
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if(new_mask != mask)
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SetCommMask(h, mask = new_mask);
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WaitCommEvent(h, &mask, 0);
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break;
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}
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return 0;
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}
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// currently only sets st_mode (file or dir) and st_size.
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int stat(const char* fn, struct stat* s)
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{
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memset(s, 0, sizeof(struct stat));
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WIN32_FILE_ATTRIBUTE_DATA fad;
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if(!GetFileAttributesEx(fn, GetFileExInfoStandard, &fad))
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return -1;
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// dir
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if(fad.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
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s->st_mode = S_IFDIR;
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else
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{
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s->st_mode = S_IFREG;
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s->st_size = (off_t)((((u64)fad.nFileSizeHigh) << 32) | fad.nFileSizeLow);
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}
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return 0;
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}
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//////////////////////////////////////////////////////////////////////////////
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//
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// dir
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//
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//////////////////////////////////////////////////////////////////////////////
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char* realpath(const char* fn, char* path)
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{
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if(!GetFullPathName(fn, PATH_MAX, path, 0))
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return 0;
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return path;
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}
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int mkdir(const char* path, mode_t)
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{
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return CreateDirectory(path, 0)? 0 : -1;
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}
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struct _DIR
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{
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WIN32_FIND_DATA fd;
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HANDLE handle;
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struct dirent ent; // must not be overwritten by calls for different dirs
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bool not_first;
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};
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DIR* opendir(const char* name)
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{
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DWORD fa = GetFileAttributes(name);
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if(fa == INVALID_FILE_ATTRIBUTES || !(fa & FILE_ATTRIBUTE_DIRECTORY))
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return 0;
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size_t size = round_up(sizeof(_DIR), 32);
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// be nice to allocator.
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_DIR* d = (_DIR*)calloc(size, 1);
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char path[MAX_PATH+1];
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strncpy(path, name, MAX_PATH-2);
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strcat(path, "\\*");
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d->handle = FindFirstFile(path, &d->fd);
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return d;
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}
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struct dirent* readdir(DIR* dir)
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{
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_DIR* d = (_DIR*)dir;
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DWORD last_err = GetLastError();
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if(d->not_first)
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if(!FindNextFile(d->handle, &d->fd))
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{
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// don't pass on the "error"
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if(GetLastError() == ERROR_NO_MORE_FILES)
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SetLastError(last_err);
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else
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debug_warn("FindNextFile failed");
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return 0;
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}
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d->not_first = true;
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d->ent.d_ino = 0;
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d->ent.d_name = &d->fd.cFileName[0];
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return &d->ent;
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}
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int closedir(DIR* dir)
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{
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_DIR* d = (_DIR*)dir;
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FindClose(d->handle);
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free(dir);
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return 0;
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}
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//////////////////////////////////////////////////////////////////////////////
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//
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// terminal
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//
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//////////////////////////////////////////////////////////////////////////////
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static HANDLE std_h[2] = { (HANDLE)((char*)0 + 3), (HANDLE)((char*)0 + 7) };
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__declspec(naked) void _get_console()
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{ __asm jmp dword ptr [AllocConsole] }
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__declspec(naked) void _hide_console()
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{ __asm jmp dword ptr [FreeConsole] }
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int tcgetattr(int fd, struct termios* termios_p)
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{
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if(fd > 2)
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return -1;
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HANDLE h = std_h[fd];
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DWORD mode;
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GetConsoleMode(h, &mode);
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termios_p->c_lflag = mode & (ENABLE_ECHO_INPUT|ENABLE_LINE_INPUT);
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return 0;
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}
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int tcsetattr(int fd, int /* optional_actions */, const struct termios* termios_p)
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{
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if(fd > 2)
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return -1;
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HANDLE h = std_h[fd];
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SetConsoleMode(h, (DWORD)termios_p->c_lflag);
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FlushConsoleInputBuffer(h);
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return 0;
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}
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int poll(struct pollfd /* fds */[], int /* nfds */, int /* timeout */)
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{
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return -1;
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}
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//////////////////////////////////////////////////////////////////////////////
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//
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// thread
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//
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//////////////////////////////////////////////////////////////////////////////
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__declspec(naked) pthread_t pthread_self(void)
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{ __asm jmp dword ptr [GetCurrentThread] }
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int pthread_getschedparam(pthread_t thread, int* policy, struct sched_param* param)
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{
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if(policy)
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{
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DWORD pc = GetPriorityClass(GetCurrentProcess());
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*policy = (pc >= HIGH_PRIORITY_CLASS)? SCHED_FIFO : SCHED_RR;
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}
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if(param)
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{
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const HANDLE hThread = mk_handle((intptr_t)thread);
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param->sched_priority = GetThreadPriority(hThread);
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}
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return 0;
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}
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int pthread_setschedparam(pthread_t thread, int policy, const struct sched_param* param)
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{
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if(policy == SCHED_FIFO)
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SetPriorityClass(GetCurrentProcess(), HIGH_PRIORITY_CLASS);
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const HANDLE hThread = mk_handle((intptr_t)thread);
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SetThreadPriority(hThread, param->sched_priority);
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return 0;
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}
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struct ThreadParam
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{
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void*(*func)(void*);
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void* user_arg;
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};
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static unsigned __stdcall thread_start(void* arg)
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{
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ThreadParam* param = (ThreadParam*)arg;
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param->func(param->user_arg);
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delete param;
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return 0;
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}
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int pthread_create(pthread_t* thread, const void* attr, void*(*func)(void*), void* user_arg)
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{
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UNUSED(attr);
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// can't use asm - _beginthreadex might be a func ptr (with DLL CRT)
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// Heap Allocate - we can't make sure that the other thread's thread_start
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// function is run before we exit this stack frame
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ThreadParam *param = new ThreadParam;
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param->func=func;
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param->user_arg=user_arg;
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*thread = (pthread_t)_beginthreadex(0, 0, thread_start, (void*)param, 0, 0);
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return 0;
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}
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// DeleteCriticalSection currently doesn't complain if we double-free
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// (e.g. user calls destroy() and static initializer atexit runs),
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// and dox are ambiguous.
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/*
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struct CS
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{
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CRITICAL_SECTION cs;
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CS()
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{
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InitializeCriticalSection(&cs);
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}
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~CS()
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{
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DeleteCriticalSection(&cs);
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}
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};*/
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cassert(sizeof(CRITICAL_SECTION) == sizeof(pthread_mutex_t));
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/*
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static std::list<CS> mutexes;
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static void destroy_mutexes()
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{
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mutexes.clear();
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}
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*/
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pthread_mutex_t pthread_mutex_initializer()
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{
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CRITICAL_SECTION cs;
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InitializeCriticalSection(&cs);
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return *(pthread_mutex_t*)&cs;
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}
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int pthread_mutex_destroy(pthread_mutex_t* m)
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{
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DeleteCriticalSection((CRITICAL_SECTION*)m);
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return 0;
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/*
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CS* cs = (CS*)m;
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mutexes.erase(cs);
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delete cs;
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return 0;
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*/
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}
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int pthread_mutex_init(pthread_mutex_t* m, const pthread_mutexattr_t*)
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{
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InitializeCriticalSection((CRITICAL_SECTION*)m);
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return 0;
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}
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int pthread_mutex_lock(pthread_mutex_t* m)
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{
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EnterCriticalSection((CRITICAL_SECTION*)m);
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return 0;
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}
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int pthread_mutex_trylock(pthread_mutex_t* m)
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{
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BOOL got_it = TryEnterCriticalSection((CRITICAL_SECTION*)m);
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return got_it? 0 : -1;
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}
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int pthread_mutex_unlock(pthread_mutex_t* m)
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{
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LeaveCriticalSection((CRITICAL_SECTION*)m);
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return 0;
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}
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int pthread_mutex_timedlock(pthread_mutex_t* m, const struct timespec* abs_timeout)
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{
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return -ENOSYS;
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}
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//////////////////////////////////////////////////////////////////////////////
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//
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// memory mapping
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//
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//////////////////////////////////////////////////////////////////////////////
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void* mmap(void* start, size_t len, int prot, int flags, int fd, off_t offset)
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{
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WIN_SAVE_LAST_ERROR;
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if(!(flags & MAP_FIXED))
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start = 0;
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/* interpret protection/mapping flags. */
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SECURITY_ATTRIBUTES sec = { sizeof(SECURITY_ATTRIBUTES), 0, 0 };
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DWORD flProtect = PAGE_READONLY; /* mapping object permission */
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DWORD dwAccess = FILE_MAP_READ; /* file map access permission */
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if(prot & PROT_WRITE)
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{
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flProtect = PAGE_READWRITE;
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/* changes are shared & written to file */
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if(flags & MAP_SHARED)
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{
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sec.bInheritHandle = 1;
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dwAccess = FILE_MAP_ALL_ACCESS;
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}
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/* private copy on write mapping */
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else if(flags & MAP_PRIVATE)
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{
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flProtect = PAGE_WRITECOPY;
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dwAccess = FILE_MAP_COPY;
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}
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}
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DWORD len_hi = (DWORD)((u64)len >> 32), len_lo = (DWORD)len & 0xffffffff;
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HANDLE hFile = mk_handle(_get_osfhandle(fd));
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HANDLE hMap = CreateFileMapping(hFile, &sec, flProtect, len_hi, len_lo, 0);
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void* ptr = MapViewOfFileEx(hMap, dwAccess, len_hi, offset, len_lo, start);
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/* file mapping object will be freed when ptr is unmapped */
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CloseHandle(hMap);
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if(!ptr || (flags & MAP_FIXED && ptr != start))
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return MAP_FAILED;
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WIN_RESTORE_LAST_ERROR;
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return ptr;
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}
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int munmap(void* start, size_t /* len */)
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{
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BOOL ok = UnmapViewOfFile(start);
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return ok? 0 : -1;
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}
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int uname(struct utsname* un)
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{
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if(!un)
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return -1;
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static OSVERSIONINFO vi;
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vi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
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GetVersionEx(&vi);
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// OS implementation name
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const char* family = "??";
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int ver = (vi.dwMajorVersion << 8) | vi.dwMinorVersion;
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if(vi.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS)
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family = (ver == 0x045a)? "ME" : "9x";
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if(vi.dwPlatformId == VER_PLATFORM_WIN32_NT)
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{
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if(ver == 0x0500)
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family = "2k";
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else if(ver == 0x0501)
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family = "XP";
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else
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family = "NT";
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}
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sprintf(un->sysname, "Win%s", family);
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// release info
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const char* vs = vi.szCSDVersion;
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int sp;
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if(sscanf(vs, "Service Pack %d", &sp) == 1)
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sprintf(un->release, "SP %d", sp);
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else
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{
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const char* release = "";
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if(vi.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS)
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{
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if(!strcmp(vs, " C"))
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release = "OSR2";
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else if(!strcmp(vs, " A"))
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release = "SE";
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}
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strcpy(un->release, release);
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}
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// version
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sprintf(un->version, "%lu.%02lu.%lu", vi.dwMajorVersion, vi.dwMinorVersion, vi.dwBuildNumber & 0xffff);
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// node name
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DWORD buf_size = sizeof(un->nodename);
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DWORD last_err = GetLastError();
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BOOL ok = GetComputerName(un->nodename, &buf_size);
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// GetComputerName sets last error even on success - suppress.
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if(ok)
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SetLastError(last_err);
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else
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debug_warn("GetComputerName failed");
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// hardware type
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static SYSTEM_INFO si;
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GetSystemInfo(&si);
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if(si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64)
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strcpy(un->machine, "AMD64");
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else
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strcpy(un->machine, "IA-32");
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return 0;
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}
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long sysconf(int name)
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{
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// used by _SC_*_PAGES
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static DWORD page_size;
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static BOOL (WINAPI *pGlobalMemoryStatusEx)(MEMORYSTATUSEX*);
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ONCE(
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{
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// get page size
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// (used by _SC_PAGESIZE and _SC_*_PAGES)
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SYSTEM_INFO si;
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GetSystemInfo(&si); // can't fail => page_size always > 0.
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page_size = si.dwPageSize;
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// import GlobalMemoryStatusEx
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// (used by _SC_*_PAGES if available -
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// it's not defined in the VC6 Platform SDK)
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const HMODULE hKernel32Dll = LoadLibrary("kernel32.dll");
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*(void**)&pGlobalMemoryStatusEx = GetProcAddress(hKernel32Dll, "GlobalMemoryStatusEx");
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FreeLibrary(hKernel32Dll);
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// make sure the reference is released so BoundsChecker
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// doesn't complain. it won't actually be unloaded anyway -
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// there is at least one other reference.
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}
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);
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switch(name)
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{
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case _SC_PAGESIZE:
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return page_size;
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case _SC_PHYS_PAGES:
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case _SC_AVPHYS_PAGES:
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{
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u64 total_phys_mem;
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u64 avail_phys_mem;
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// first try GlobalMemoryStatus - cannot fail.
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// override its results if GlobalMemoryStatusEx is available.
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MEMORYSTATUS ms;
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GlobalMemoryStatus(&ms);
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// can't fail.
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total_phys_mem = ms.dwTotalPhys;
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avail_phys_mem = ms.dwAvailPhys;
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// newer API is available: use it to report correct results
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// (no overflow or wraparound) on systems with > 4 GB of memory.
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MEMORYSTATUSEX mse = { sizeof(mse) };
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if(pGlobalMemoryStatusEx(&mse))
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{
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total_phys_mem = mse.ullTotalPhys;
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avail_phys_mem = mse.ullAvailPhys;
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}
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else
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// no matter though, we have the results from GlobalMemoryStatus.
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debug_warn("GlobalMemoryStatusEx failed - why?");
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if(name == _SC_PHYS_PAGES)
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return (long)(round_up((uintptr_t)total_phys_mem, 2*MB) / page_size);
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// Richter, "Programming Applications for Windows":
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// reported value doesn't include non-paged pool reserved
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// during boot; it's not considered available to kernel.
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// it's 528 KB on my 512 MB machine (WinXP and Win2k).
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else
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return (long)(avail_phys_mem / page_size);
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}
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default:
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return -1;
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}
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}
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