mirror of https://github.com/ProDOS-8/xHD.git
Removed unnecessary source file.
https://github.com/digitalinteraction/openmovement/blob/master/Software/AX3/omconvert/mmap-win32.h already contains the full implementation.
This commit is contained in:
Oliver Schmidt
parent
413bfd6b96
commit
b958c660a9
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@ -12,6 +12,4 @@ CXX = g++
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CPPFLAGS = -m64 -I win32
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LDFLAGS = -m64 -L win32
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xHDServer: win32/mmap-win32.o
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endif # Windows_NT
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@ -1,165 +0,0 @@
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/*
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* Copyright (c) 2014, Newcastle University, UK.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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// Memory mapped file - Implementation of mmap() for Windows
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// Dan Jackson, 2014 - 'MMAP_CLEANUP' changes to clean up otherwise leaked handles from CreateFileMapping()
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// Original author: Mike Frysinger <vapier@gentoo.org>, placed into the public domain.
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// References:
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// CreateFileMapping: http://msdn.microsoft.com/en-us/library/aa366537(VS.85).aspx
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// CloseHandle: http://msdn.microsoft.com/en-us/library/ms724211(VS.85).aspx
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// MapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366761(VS.85).aspx
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// UnmapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366882(VS.85).aspx
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#define MMAP_CLEANUP // Dan
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#include <io.h>
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#include <windows.h>
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#include <sys/types.h>
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#ifdef MMAP_CLEANUP
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struct mmap_cleanup_tag;
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typedef struct mmap_cleanup_tag
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{
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void *addr;
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HANDLE h;
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struct mmap_cleanup_tag *next;
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} mmap_cleanup_t;
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mmap_cleanup_t *mmap_cleanup = NULL;
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#endif
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#define PROT_READ 0x1
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#define PROT_WRITE 0x2
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/* This flag is only available in WinXP+ */
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#ifdef FILE_MAP_EXECUTE
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#define PROT_EXEC 0x4
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#else
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#define PROT_EXEC 0x0
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#define FILE_MAP_EXECUTE 0
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#endif
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#define MAP_SHARED 0x01
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#define MAP_PRIVATE 0x02
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#define MAP_ANONYMOUS 0x20
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#define MAP_ANON MAP_ANONYMOUS
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#define MAP_FAILED ((void *) -1)
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#ifdef __USE_FILE_OFFSET64
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# define DWORD_HI(x) (x >> 32)
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# define DWORD_LO(x) ((x) & 0xffffffff)
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#else
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# define DWORD_HI(x) (0)
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# define DWORD_LO(x) (x)
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#endif
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static void *mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset)
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{
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if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC))
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return MAP_FAILED;
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if (fd == -1) {
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if (!(flags & MAP_ANON) || offset)
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return MAP_FAILED;
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} else if (flags & MAP_ANON)
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return MAP_FAILED;
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DWORD flProtect;
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if (prot & PROT_WRITE) {
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if (prot & PROT_EXEC)
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flProtect = PAGE_EXECUTE_READWRITE;
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else
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flProtect = PAGE_READWRITE;
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} else if (prot & PROT_EXEC) {
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if (prot & PROT_READ)
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flProtect = PAGE_EXECUTE_READ;
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else if (prot & PROT_EXEC)
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flProtect = PAGE_EXECUTE;
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} else
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flProtect = PAGE_READONLY;
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off_t end = length + offset;
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HANDLE mmap_fd, h;
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if (fd == -1)
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mmap_fd = INVALID_HANDLE_VALUE;
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else
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mmap_fd = (HANDLE)_get_osfhandle(fd);
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h = CreateFileMapping(mmap_fd, NULL, flProtect, DWORD_HI(end), DWORD_LO(end), NULL);
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if (h == NULL)
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return MAP_FAILED;
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DWORD dwDesiredAccess;
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if (prot & PROT_WRITE)
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dwDesiredAccess = FILE_MAP_WRITE;
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else
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dwDesiredAccess = FILE_MAP_READ;
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if (prot & PROT_EXEC)
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dwDesiredAccess |= FILE_MAP_EXECUTE;
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if (flags & MAP_PRIVATE)
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dwDesiredAccess |= FILE_MAP_COPY;
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void *ret = MapViewOfFile(h, dwDesiredAccess, DWORD_HI(offset), DWORD_LO(offset), length);
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if (ret == NULL) {
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CloseHandle(h);
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ret = MAP_FAILED;
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}
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#ifdef MMAP_CLEANUP
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else
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{
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// Add a tracking element (to the start of our list)
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mmap_cleanup_t *mc = (mmap_cleanup_t *)malloc(sizeof(mmap_cleanup_t));
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if (mc != NULL)
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{
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mc->addr = ret;
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mc->h = h;
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mc->next = mmap_cleanup;
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mmap_cleanup = mc;
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}
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}
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#endif
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return ret;
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}
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static void munmap(void *addr, size_t length)
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{
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UnmapViewOfFile(addr);
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#ifdef MMAP_CLEANUP
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// Look up through the tracking elements to close the handle
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mmap_cleanup_t **prevPtr = &mmap_cleanup;
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mmap_cleanup_t *mc;
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for (mc = *prevPtr; mc != NULL; prevPtr = &mc->next, mc = *prevPtr)
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{
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if (mc->addr == addr)
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{
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CloseHandle(mc->h);
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*prevPtr = mc->next;
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break;
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}
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}
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#else
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// ruh-ro, we leaked handle from CreateFileMapping() ...
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#endif
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}
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#undef DWORD_HI
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#undef DWORD_LO
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