Added support for mappings with no associated file.

include/server/object.h

@@ -153,6 +153,8 @@ extern struct file *get_file_obj( struct process *process, int handle,
 extern int file_get_mmap_fd( struct file *file );
 extern int set_file_pointer( int handle, int *low, int *high, int whence );
 extern int truncate_file( int handle );
+extern int grow_file( struct file *file, int size_high, int size_low );
+extern struct file *create_temp_file( int access );
 extern int set_file_time( int handle, time_t access_time, time_t write_time );
 extern int file_lock( struct file *file, int offset_high, int offset_low,
                       int count_high, int count_low );

memory/virtual.c

@@ -1109,37 +1109,8 @@ HANDLE WINAPI CreateFileMappingA(
 
     /* Compute the size and extend the file if necessary */
 
-    if (hFile == INVALID_HANDLE_VALUE)
-    {
-	if (!size_high && !size_low)
-	{
-	    SetLastError( ERROR_INVALID_PARAMETER );
-	    return 0;
-	}
-        if (name)
-	{
-	    CHAR	buf[260];
-
-	    GetTempPathA(260,buf);
-	    GetTempFileNameA(buf,"wine",0,buf);
-	    hFile = CreateFileA(
-	    	buf,
-		GENERIC_READ|GENERIC_WRITE,
-	    	FILE_SHARE_READ|FILE_SHARE_WRITE,/* so we can reuse the tmpfn */
-		NULL,
-		OPEN_ALWAYS,
-		0,
-		0
-	    );
-	    /* FIXME: bad hack to avoid lots of leftover tempfiles */
-	    DeleteFileA(buf); 
-	    if (hFile == INVALID_HANDLE_VALUE)
-	    	FIXME(virtual,"could not create temp. file for anon shared mapping: reason was 0x%08lx\n",GetLastError());
-	}
-    }
     if (hFile != INVALID_HANDLE_VALUE) /* We have a file */
     {
-        BY_HANDLE_FILE_INFORMATION info;
         DWORD access = GENERIC_READ;
 
         if (((protect & 0xff) == PAGE_READWRITE) ||
@@ -1150,21 +1121,6 @@ HANDLE WINAPI CreateFileMappingA(
 
         if ((req.handle = HANDLE_GetServerHandle( PROCESS_Current(), hFile,
                                                   K32OBJ_FILE, access )) == -1) goto error;
-        if (!GetFileInformationByHandle( hFile, &info )) goto error;
-        if (!size_high && !size_low)
-        {
-            size_high = info.nFileSizeHigh;
-            size_low  = info.nFileSizeLow;
-        }
-        else if ((size_high > info.nFileSizeHigh) ||
-                 ((size_high == info.nFileSizeHigh) &&
-                  (size_low > info.nFileSizeLow)))
-        {
-            /* We have to grow the file */
-            if (SetFilePointer( hFile, size_low, &size_high,
-                                FILE_BEGIN ) == 0xffffffff) goto error;
-            if (!SetEndOfFile( hFile )) goto error;
-        }
     }
     else req.handle = -1;
 
@@ -1173,6 +1129,7 @@ HANDLE WINAPI CreateFileMappingA(
     req.size_high = size_high;
     req.size_low  = ROUND_SIZE( 0, size_low );
     req.protect   = vprot;
+    req.inherit   = inherit;
     CLIENT_SendRequest( REQ_CREATE_MAPPING, -1, 2,
                         &req, sizeof(req),
                         name, name ? strlen(name) + 1 : 0 );

server/file.c

@@ -199,6 +199,45 @@ struct object *create_file( int fd, const char *name, unsigned int access,
     return &file->obj;
 }
 
+/* Create a temp file for anonymous mappings */
+struct file *create_temp_file( int access )
+{
+    struct file *file;
+    char *name;
+    int fd;
+
+    do
+    {
+        if (!(name = tmpnam(NULL)))
+        {
+            SET_ERROR( ERROR_TOO_MANY_OPEN_FILES );
+            return NULL;
+        }
+        fd = open( name, O_CREAT | O_EXCL | O_RDWR, 0600 );
+    } while ((fd == -1) && (errno == EEXIST));
+    if (fd == -1)
+    {
+        file_set_error();
+        return NULL;
+    }
+    unlink( name );
+
+    if (!(file = mem_alloc( sizeof(*file) )))
+    {
+        close( fd );
+        return NULL;
+    }
+    init_object( &file->obj, &file_ops, NULL );
+    file->name    = NULL;
+    file->next    = NULL;
+    file->fd      = fd;
+    file->access  = access;
+    file->flags   = 0;
+    file->sharing = 0;
+    CLEAR_ERROR();
+    return file;
+}
+
 static void file_dump( struct object *obj, int verbose )
 {
     struct file *file = (struct file *)obj;
@@ -406,6 +445,27 @@ int truncate_file( int handle )
     
 }
 
+/* try to grow the file to the specified size */
+int grow_file( struct file *file, int size_high, int size_low )
+{
+    struct stat st;
+
+    if (size_high)
+    {
+        SET_ERROR( ERROR_INVALID_PARAMETER );
+        return 0;
+    }
+    if (fstat( file->fd, &st ) == -1)
+    {
+        file_set_error();
+        return 0;
+    }
+    if (st.st_size >= size_low) return 1;  /* already large enough */
+    if (ftruncate( file->fd, size_low ) != -1) return 1;
+    file_set_error();
+    return 0;
+}
+
 int set_file_time( int handle, time_t access_time, time_t write_time )
 {
     struct file *file;

server/mapping.c

@@ -9,6 +9,7 @@
 #include <stdlib.h>
 #include <unistd.h>
 
+#include "config.h"
 #include "winerror.h"
 #include "winnt.h"
 #include "server/process.h"
@@ -40,10 +41,51 @@ static const struct object_ops mapping_ops =
     mapping_destroy
 };
 
+#ifdef __i386__
+
+/* These are always the same on an i386, and it will be faster this way */
+# define page_mask  0xfff
+# define page_shift 12
+# define init_page_size() /* nothing */
+
+#else  /* __i386__ */
+
+static int page_shift, page_mask;
+
+static void init_page_size(void)
+{
+    int page_size;
+# ifdef HAVE_GETPAGESIZE
+    page_size = getpagesize();
+# else
+#  ifdef __svr4__
+    page_size = sysconf(_SC_PAGESIZE);
+#  else
+#   error Cannot get the page size on this platform
+#  endif
+# endif
+    page_mask = page_size - 1;
+    /* Make sure we have a power of 2 */
+    assert( !(page_size & page_mask) );
+    page_shift = 0;
+    while ((1 << page_shift) != page_size) page_shift++;
+}
+#endif  /* __i386__ */
+
+#define ROUND_ADDR(addr) \
+   ((int)(addr) & ~page_mask)
+
+#define ROUND_SIZE(addr,size) \
+   (((int)(size) + ((int)(addr) & page_mask) + page_mask) & ~page_mask)
+
+
 struct object *create_mapping( int size_high, int size_low, int protect,
                                int handle, const char *name )
 {
     struct mapping *mapping;
+    int access = 0;
+
+    if (!page_mask) init_page_size();
 
     if (!(mapping = (struct mapping *)create_named_object( name, &mapping_ops,
                                                            sizeof(*mapping) )))
@@ -51,22 +93,42 @@ struct object *create_mapping( int size_high, int size_low, int protect,
     if (GET_ERROR() == ERROR_ALREADY_EXISTS)
         return &mapping->obj;  /* Nothing else to do */
 
-    mapping->size_high = size_high;
-    mapping->size_low  = size_low;
-    mapping->protect   = protect;
-    if (handle != -1)
-    {
-        int access = 0;
     if (protect & VPROT_READ) access |= GENERIC_READ;
     if (protect & VPROT_WRITE) access |= GENERIC_WRITE;
-        if (!(mapping->file = get_file_obj( current->process, handle, access )))
+
+    size_low = ROUND_SIZE( 0, size_low );
+    if (handle != -1)
     {
-            release_object( mapping );
-            return NULL;
+        if (!(mapping->file = get_file_obj( current->process, handle, access ))) goto error;
+        if (!size_high && !size_low)
+        {
+            struct get_file_info_reply reply;
+            struct object *obj = (struct object *)mapping->file;
+            obj->ops->get_file_info( obj, &reply );
+            size_high = reply.size_high;
+            size_low  = ROUND_SIZE( 0, reply.size_low );
+        }
+        else if (!grow_file( mapping->file, size_high, size_low )) goto error;
+    }
+    else  /* Anonymous mapping (no associated file) */
+    {
+        if (!size_high && !size_low)
+        {
+            SET_ERROR( ERROR_INVALID_PARAMETER );
+            mapping->file = NULL;
+            goto error;
         }
+        if (!(mapping->file = create_temp_file( access ))) goto error;
+        if (!grow_file( mapping->file, size_high, size_low )) goto error;
     }
-    else mapping->file = NULL;
+    mapping->size_high = size_high;
+    mapping->size_low  = size_low;
+    mapping->protect   = protect;
     return &mapping->obj;
+
+ error:
+    release_object( mapping );
+    return NULL;
 }
 
 int open_mapping( unsigned int access, int inherit, const char *name )