There's code using this in Roadmap, and it works.
Included below.
Danny
const char *roadmap_file_map (const char *path,
const char *name,
const char *mode,
RoadMapFileContext *file)
{
RoadMapFileContext context;
DWORD file_size;
const char *full_name;
context = malloc (sizeof(*context));
roadmap_check_allocated(context);
context->hFile = INVALID_HANDLE_VALUE;
context->base = NULL;
context->name = NULL;
context->size = 0;
if (name[0] == '\\') {
full_name = name;
} else {
full_name = roadmap_path_join (path, name);
}
context->name = ConvertToUNICODE(full_name);
context->hFile = CreateFileForMapping(
context->name,
GENERIC_READ ,
FILE_SHARE_READ, NULL, OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL, NULL);
if (context->hFile == INVALID_HANDLE_VALUE ) {
roadmap_log (ROADMAP_INFO, "cannot open file %s",
full_name);
roadmap_file_unmap (&context);
return NULL;
}
file_size = GetFileSize(context->hFile, NULL);
if (file_size == INVALID_FILE_SIZE) {
roadmap_log (ROADMAP_ERROR, "cannot get size of file %
s", full_name);
roadmap_file_unmap (&context);
return NULL;
}
context->size = file_size;
context->hFile = CreateFileMapping(
context->hFile,
NULL,
PAGE_READONLY,
0,0,0);
if (context->hFile == INVALID_HANDLE_VALUE) {
roadmap_log (ROADMAP_INFO, "cannot open file %s",
full_name);
roadmap_file_unmap (&context);
return NULL;
}
context->base = MapViewOfFile(context->hFile, FILE_MAP_READ, 0,
0, 0 );
if (context->base == NULL) {
roadmap_log (ROADMAP_ERROR, "cannot map file %s",
full_name);
roadmap_file_unmap (&context);
return NULL;
}
*file = context;
roadmap_log (ROADMAP_INFO, "Mapped file %s", full_name);
return context->base;
}
On Sun, 2008-06-08 at 09:37 +0200, Vincent Torri wrote:
> Hey,
>
> I want to simulate mmap on windows ce. I've already written a code that
> works on Windows XP. I thought that there would be no problem on Windows
> CE, but it seems that CreateFileMapping() returns always an error.
>
> Here is my complete test code :
>
> /* arm-wince-cegcc-gcc -O3 -Wall -mwin32 -o cegcc_test1.exe cegcc_test1.c
> -Wl,--enable-auto-import -Wl,-s */
>
> #include <stdlib.h>
> #include <stdio.h>
>
> #include <windows.h>
> # include <wchar.h>
>
>
> wchar_t *
> evil_char_to_wchar(const char *text)
> {
> wchar_t *wtext;
> int wsize;
>
> wsize = MultiByteToWideChar(CP_ACP, 0, text, strlen(text) + 1, NULL,
> 0);
> if ((wsize == 0) ||
> (wsize > (int)(ULONG_MAX/sizeof(wchar_t))))
> return NULL;
>
> wtext = malloc(wsize * sizeof(wchar_t));
> if (wtext)
> if (!MultiByteToWideChar(CP_ACP, 0, text, strlen(text) + 1, wtext,
> wsize))
> return NULL;
>
> return wtext;
> }
>
> char *
> evil_wchar_to_char(const wchar_t *text)
> {
> char * atext;
> int size;
> int asize;
>
> size = wcslen(text) + 1;
>
> asize = WideCharToMultiByte(CP_ACP, 0, text, size, NULL, 0, NULL,
> NULL);
> if (asize == 0)
> return NULL;
>
> atext = (char*)malloc((asize + 1) * sizeof(char));
>
> if (atext)
> if (!WideCharToMultiByte(CP_ACP, 0, text, size, atext, asize, NULL,
> NULL))
> return NULL;
> atext[asize] = '\0';
>
> return atext;
> }
>
> char *
> evil_last_error_get(void)
> {
> char str[206];
> LPTSTR str1;
> char *str2;
> DWORD err;
>
> err = GetLastError();
> FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
> FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
> NULL,
> err,
> 0, // Default language
> (LPTSTR)&str1,
> 0,
> NULL);
>
> #ifdef UNICODE
> str2 = evil_wchar_to_char(str1);
> LocalFree(str1);
> #else
> str2 = str1;
> #endif /* ! UNICODE */
>
> snprintf(str, 206, "(%ld) %s", err, str2);
> LocalFree(str2);
>
> return strdup(str);
> }
>
>
> int main (int argc, char *argv[])
> {
> FILE *fp;
> int fd;
> HANDLE handle;
> HANDLE fm;
> wchar_t *file;
>
> fp = fopen (argv[1], "rb");
> if (!fp) {
> printf (" * fopen failed\n");
> return -1;
> }
>
> fd = fileno (fp);
> printf (" %p %d\n", fp, fd);
> handle = (HANDLE)get_osfhandle (fd);
> if (handle == INVALID_HANDLE_VALUE) {
> printf(" * get_osfhandle failed\n");
> return -1;
> }
>
> fm = CreateFileMapping(handle,
> NULL,
> PAGE_READONLY,
> 0,
> 0,
> NULL);
> if (!fm) {
> printf (" * CreateFileMapping failed %s\n", evil_last_error_get());
> return -1;
> }
>
> printf ("success\n");
>
> return 0;
> }
>
>
>
> CreateFileMapping returns the error 6 "The handle is invalid." If I use
> PAGE_READWRITE, I get the error 5 "Access is denied."
>
> So I tried to create the handle with CreateFileForMapping(), using that
> code:
>
>
> file = evil_char_to_wchar(argv[1]);
> handle = CreateFileForMapping(file, GENERIC_READ, 0, NULL, OPEN_EXISTING,
> 0, 0);
>
>
> but then, the error is 87 "The parameter is incorrect."
>
> Does someone know if CreateFileMapping() is working with cegcc ? And if
> it is working, what is wrong in my code ?
>
> thank you
>
> Vincent Torri
>
>
>
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>
--
Danny Backx ; danny.backx - at - scarlet.be ; http://danny.backx.info
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