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path: root/intern/guardedalloc/intern/mmap_win.c
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Diffstat (limited to 'intern/guardedalloc/intern/mmap_win.c')
-rw-r--r--intern/guardedalloc/intern/mmap_win.c294
1 files changed, 0 insertions, 294 deletions
diff --git a/intern/guardedalloc/intern/mmap_win.c b/intern/guardedalloc/intern/mmap_win.c
deleted file mode 100644
index a02a0f88fa9..00000000000
--- a/intern/guardedalloc/intern/mmap_win.c
+++ /dev/null
@@ -1,294 +0,0 @@
-/*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
- * The Original Code is Copyright (C) 2008 Blender Foundation.
- * All rights reserved.
- */
-
-/** \file
- * \ingroup MEM
- */
-
-#ifdef WIN32
-
-# include <errno.h>
-# include <io.h>
-# include <stdio.h>
-# include <sys/types.h>
-# include <windows.h>
-
-# include "mmap_win.h"
-
-# ifndef FILE_MAP_EXECUTE
-// not defined in earlier versions of the Platform SDK (before February 2003)
-# define FILE_MAP_EXECUTE 0x0020
-# endif
-
-/* copied from BLI_utildefines.h, ugh */
-# ifdef __GNUC__
-# define UNUSED(x) UNUSED_##x __attribute__((__unused__))
-# else
-# define UNUSED(x) x
-# endif
-
-/* --------------------------------------------------------------------- */
-/* local storage definitions */
-/* --------------------------------------------------------------------- */
-/* all memory mapped chunks are put in linked lists */
-typedef struct mmapLink {
- struct mmapLink *next, *prev;
-} mmapLink;
-
-typedef struct mmapListBase {
- void *first, *last;
-} mmapListBase;
-
-typedef struct MemMap {
- struct MemMap *next, *prev;
- void *mmap;
- HANDLE fhandle;
- HANDLE maphandle;
-} MemMap;
-
-/* --------------------------------------------------------------------- */
-/* local functions */
-/* --------------------------------------------------------------------- */
-
-static void mmap_addtail(volatile mmapListBase *listbase, void *vlink);
-static void mmap_remlink(volatile mmapListBase *listbase, void *vlink);
-static void *mmap_findlink(volatile mmapListBase *listbase, void *ptr);
-
-static int mmap_get_prot_flags(int flags);
-static int mmap_get_access_flags(int flags);
-
-/* --------------------------------------------------------------------- */
-/* vars */
-/* --------------------------------------------------------------------- */
-volatile static struct mmapListBase _mmapbase;
-volatile static struct mmapListBase *mmapbase = &_mmapbase;
-
-/* --------------------------------------------------------------------- */
-/* implementation */
-/* --------------------------------------------------------------------- */
-
-/* mmap for windows */
-void *mmap(void *UNUSED(start), size_t len, int prot, int flags, int fd, off_t offset)
-{
- HANDLE fhandle = INVALID_HANDLE_VALUE;
- HANDLE maphandle;
- int prot_flags = mmap_get_prot_flags(prot);
- int access_flags = mmap_get_access_flags(prot);
- MemMap *mm = NULL;
- void *ptr = NULL;
-
- if (flags & MAP_FIXED) {
- return MAP_FAILED;
- }
-
-# if 0
- if (fd == -1) {
- _set_errno(EBADF);
- return MAP_FAILED;
- }
-# endif
-
- if (fd != -1) {
- fhandle = (HANDLE)_get_osfhandle(fd);
- }
- if (fhandle == INVALID_HANDLE_VALUE) {
- if (!(flags & MAP_ANONYMOUS)) {
- errno = EBADF;
- return MAP_FAILED;
- }
- }
- else {
- if (!DuplicateHandle(GetCurrentProcess(),
- fhandle,
- GetCurrentProcess(),
- &fhandle,
- 0,
- FALSE,
- DUPLICATE_SAME_ACCESS)) {
- return MAP_FAILED;
- }
- }
-
- /* Split 64 bit size into low and high bits. */
- DWORD len_bits_high = len >> 32;
- DWORD len_bits_low = len & 0xFFFFFFFF;
-
- maphandle = CreateFileMapping(fhandle, NULL, prot_flags, len_bits_high, len_bits_low, NULL);
- if (maphandle == 0) {
- errno = EBADF;
- return MAP_FAILED;
- }
-
- ptr = MapViewOfFile(maphandle, access_flags, 0, offset, 0);
- if (ptr == NULL) {
- DWORD dwLastErr = GetLastError();
- if (dwLastErr == ERROR_MAPPED_ALIGNMENT) {
- errno = EINVAL;
- }
- else {
- errno = EACCES;
- }
- CloseHandle(maphandle);
- return MAP_FAILED;
- }
-
- mm = (MemMap *)malloc(sizeof(MemMap));
- if (!mm) {
- errno = ENOMEM;
- }
- mm->fhandle = fhandle;
- mm->maphandle = maphandle;
- mm->mmap = ptr;
- mmap_addtail(mmapbase, mm);
-
- return ptr;
-}
-
-/* munmap for windows */
-intptr_t munmap(void *ptr, size_t UNUSED(size))
-{
- MemMap *mm = mmap_findlink(mmapbase, ptr);
- if (!mm) {
- errno = EINVAL;
- return -1;
- }
- UnmapViewOfFile(mm->mmap);
- CloseHandle(mm->maphandle);
- CloseHandle(mm->fhandle);
- mmap_remlink(mmapbase, mm);
- free(mm);
- return 0;
-}
-
-/* --------------------------------------------------------------------- */
-/* local functions */
-/* --------------------------------------------------------------------- */
-
-static void mmap_addtail(volatile mmapListBase *listbase, void *vlink)
-{
- struct mmapLink *link = vlink;
-
- if (link == NULL) {
- return;
- }
- if (listbase == NULL) {
- return;
- }
-
- link->next = 0;
- link->prev = listbase->last;
-
- if (listbase->last) {
- ((struct mmapLink *)listbase->last)->next = link;
- }
- if (listbase->first == NULL) {
- listbase->first = link;
- }
- listbase->last = link;
-}
-
-static void mmap_remlink(volatile mmapListBase *listbase, void *vlink)
-{
- struct mmapLink *link = vlink;
-
- if (link == NULL) {
- return;
- }
- if (listbase == NULL) {
- return;
- }
- if (link->next) {
- link->next->prev = link->prev;
- }
- if (link->prev) {
- link->prev->next = link->next;
- }
-
- if (listbase->last == link) {
- listbase->last = link->prev;
- }
- if (listbase->first == link) {
- listbase->first = link->next;
- }
-}
-
-static void *mmap_findlink(volatile mmapListBase *listbase, void *ptr)
-{
- MemMap *mm;
-
- if (ptr == NULL) {
- return NULL;
- }
- if (listbase == NULL) {
- return NULL;
- }
-
- mm = (MemMap *)listbase->first;
- while (mm) {
- if (mm->mmap == ptr) {
- return mm;
- }
- mm = mm->next;
- }
- return NULL;
-}
-
-static int mmap_get_prot_flags(int flags)
-{
- int prot = PAGE_NOACCESS;
-
- if ((flags & PROT_READ) == PROT_READ) {
- if ((flags & PROT_WRITE) == PROT_WRITE) {
- prot = (flags & PROT_EXEC) ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE;
- }
- else {
- prot = (flags & PROT_EXEC) ? PAGE_EXECUTE_READ : PAGE_READONLY;
- }
- }
- else if ((flags & PROT_WRITE) == PROT_WRITE) {
- prot = (flags & PROT_EXEC) ? PAGE_EXECUTE_READ : PAGE_WRITECOPY;
- }
- else if ((flags & PROT_EXEC) == PROT_EXEC) {
- prot = PAGE_EXECUTE_READ;
- }
- return prot;
-}
-
-static int mmap_get_access_flags(int flags)
-{
- int access = 0;
-
- if ((flags & PROT_READ) == PROT_READ) {
- if ((flags & PROT_WRITE) == PROT_WRITE) {
- access = FILE_MAP_WRITE;
- }
- else {
- access = (flags & PROT_EXEC) ? FILE_MAP_EXECUTE : FILE_MAP_READ;
- }
- }
- else if ((flags & PROT_WRITE) == PROT_WRITE) {
- access = FILE_MAP_COPY;
- }
- else if ((flags & PROT_EXEC) == PROT_EXEC) {
- access = FILE_MAP_EXECUTE;
- }
- return access;
-}
-
-#endif // WIN32
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