forked from 0ad/0ad
497 lines
9.6 KiB
C++
Executable File
497 lines
9.6 KiB
C++
Executable File
// POSIX emulation for Win32
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//
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// Copyright (c) 2003 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 <cassert>
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#include <cstdlib>
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#include <cmath>
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#include <cstdio>
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#include <process.h>
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#include "posix.h"
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#include "win.h"
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#include "time.h"
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#include "misc.h"
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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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/*
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extern int aio_open(const char*, int, int);
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extern int aio_close(int);
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*/
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int open(const char* fn, int mode, ...)
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{
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// /dev/tty? => COM?
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if(!strncmp(fn, "/dev/tty", 8))
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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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int fd = _open(fn, mode);
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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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aio_open(fn, mode, fd);
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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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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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HANDLE h = (HANDLE)((char*)0 + _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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//////////////////////////////////////////////////////////////////////////////
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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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_DIR* d = (_DIR*)calloc(sizeof(_DIR), 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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if(d->not_first)
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if(!FindNextFile(d->handle, &d->fd))
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return 0;
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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_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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HANDLE hThread = (HANDLE)((char*)0 + thread);
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SetThreadPriority(hThread, param->sched_priority);
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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* arg)
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{
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/* can't use asm 'cause _beginthread might be a func ptr (with libc) */
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return (int)_beginthread((void(*)(void*))func, 0, arg);
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}
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pthread_mutex_t pthread_mutex_initializer()
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{
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return CreateMutex(0, 0, 0);
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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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if(!m)
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return -1;
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*m = pthread_mutex_initializer();
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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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return WaitForSingleObject(*m, INFINITE) == WAIT_OBJECT_0? 0 : -1;
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}
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int pthread_mutex_trylock(pthread_mutex_t* m)
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{
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return WaitForSingleObject(*m, 0) == WAIT_OBJECT_0? 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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return ReleaseMutex(*m)? 0 : -1;
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}
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//////////////////////////////////////////////////////////////////////////////
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//
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// time
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//
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//////////////////////////////////////////////////////////////////////////////
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int clock_gettime(clockid_t clock_id, struct timespec* tp)
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{
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static double start_t = -1.0;
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static time_t start_s;
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if(start_t < 0.0)
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{
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start_s = time(0);
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start_t = get_time();
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}
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if(clock_id != CLOCK_REALTIME)
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{
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// errno = EINVAL;
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return -1;
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}
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double t = get_time();
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double dt = t-start_t;
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start_t = t;
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int ds = (int)floor(dt);
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int dn = (int)floor((dt-ds) * 1.0e9);
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tp->tv_sec = start_s + ds;
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tp->tv_nsec = 0 + dn;
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return 0;
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}
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int nanosleep(const struct timespec* rqtp, struct timespec* /* rmtp */)
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{
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int ms = (int)rqtp->tv_sec * 1000 + rqtp->tv_nsec / 1000000;
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if(ms > 0)
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Sleep(ms);
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else
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{
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struct timespec t1, t2;
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clock_gettime(CLOCK_REALTIME, &t1);
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int d_ns;
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do
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{
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clock_gettime(CLOCK_REALTIME, &t2);
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d_ns = (int)(t2.tv_sec-t1.tv_sec)*1000000000 + (t2.tv_nsec-t1.tv_nsec);
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}
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while(d_ns < rqtp->tv_nsec);
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}
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return 0;
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}
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uint sleep(uint sec)
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{
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Sleep(sec * 1000);
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return sec;
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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, unsigned int len, int prot, int flags, int fd, long offset)
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{
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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 = (u32)((u64)len >> 32), len_lo = (u32)len & 0xffffffff;
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HANDLE hFile = (HANDLE)((char*)0 + _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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return ptr;
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}
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int munmap(void* start, unsigned int /* len */)
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{
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return UnmapViewOfFile(start) - 1; /* 0: success; -1: fail */
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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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u32 buf_size = sizeof(un->nodename);
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GetComputerName(un->nodename, &buf_size);
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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, "x86");
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return 0;
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}
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u16_t htons(u16_t s)
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{
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return (s >> 8) || ((s & 0xff) << 8);
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}
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void entry(void)
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{
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// note: winsock header is also removed by this define
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#ifndef NO_WINSOCK
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char d[1024];
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WSAStartup(0x0002, d); // want 2.0
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#endif
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mainCRTStartup();
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}
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