diff options
Diffstat (limited to 'intern/guardedalloc/intern/mmap_win.c')
| -rw-r--r-- | intern/guardedalloc/intern/mmap_win.c | 336 |
1 files changed, 176 insertions, 160 deletions
diff --git a/intern/guardedalloc/intern/mmap_win.c b/intern/guardedalloc/intern/mmap_win.c index 93b0370a011..d5488351700 100644 --- a/intern/guardedalloc/intern/mmap_win.c +++ b/intern/guardedalloc/intern/mmap_win.c @@ -23,43 +23,43 @@ #ifdef WIN32 -#include <windows.h> -#include <errno.h> -#include <io.h> -#include <sys/types.h> -#include <stdio.h> +# include <windows.h> +# include <errno.h> +# include <io.h> +# include <sys/types.h> +# include <stdio.h> -#include "mmap_win.h" +# include "mmap_win.h" -#ifndef FILE_MAP_EXECUTE +# ifndef FILE_MAP_EXECUTE //not defined in earlier versions of the Platform SDK (before February 2003) -#define FILE_MAP_EXECUTE 0x0020 -#endif +# 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 +# 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; + struct mmapLink *next, *prev; } mmapLink; typedef struct mmapListBase { - void *first, *last; + void *first, *last; } mmapListBase; typedef struct MemMap { - struct MemMap *next, *prev; - void *mmap; - HANDLE fhandle; - HANDLE maphandle; + struct MemMap *next, *prev; + void *mmap; + HANDLE fhandle; + HANDLE maphandle; } MemMap; /* --------------------------------------------------------------------- */ @@ -79,7 +79,6 @@ static int mmap_get_access_flags(int flags); volatile static struct mmapListBase _mmapbase; volatile static struct mmapListBase *mmapbase = &_mmapbase; - /* --------------------------------------------------------------------- */ /* implementation */ /* --------------------------------------------------------------------- */ @@ -87,84 +86,89 @@ volatile static struct mmapListBase *mmapbase = &_mmapbase; /* 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; - } - } - - /* note len is passed to a 32 bit DWORD, so can't be > 4 GB */ - maphandle = CreateFileMapping(fhandle, NULL, prot_flags, 0, len, 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; + 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; + } + } + + /* note len is passed to a 32 bit DWORD, so can't be > 4 GB */ + maphandle = CreateFileMapping(fhandle, NULL, prot_flags, 0, len, 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; + 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; } /* --------------------------------------------------------------------- */ @@ -173,90 +177,102 @@ intptr_t munmap(void *ptr, size_t UNUSED(size)) static void mmap_addtail(volatile mmapListBase *listbase, void *vlink) { - struct mmapLink *link = vlink; + struct mmapLink *link = vlink; - if (link == NULL) return; - if (listbase == NULL) return; + if (link == NULL) + return; + if (listbase == NULL) + return; - link->next = 0; - link->prev = listbase->last; + 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; + 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; + 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; + 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; + 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; + 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 +#endif // WIN32 |