[PATCH] Set FILE_ATTRIBUTE_TEMPORARY on files opened by mkstemp() on WinNT
Vaclav Haisman
V.Haisman@sh.cvut.cz
Fri Jul 22 01:18:00 GMT 2005
On Thu, 21 Jul 2005, Christopher Faylor wrote:
> On Fri, Jul 22, 2005 at 01:32:50AM +0200, Vaclav Haisman wrote:
> >the attached patch sets FILE_ATTRIBUTE_TEMPORARY on files opened by
> >mkstemp() on WinNT class systems. Theoretically the OS should then be
> >less eager to write such files onto the physical storage and use cache
> >instead.
>
> Thank you for the patch but unless you can demonstrate some obvious
> performance improvements I don't think we'll be applying it. You've
> slowed down (slightly) the common case of calling open for the uncommon
> case of calling mk?temp.
I am not sure what kind of slow down do you mean. Is it the one extra call? In
that case the attached modified patch should fix it. The call to
open_with_attributes() in open() gets inlined, I have checked the resulting .s
file.
>
> Also, if this was to be accepted, the preference for this type of thing
> is to add a capability like wincap.has_file_attribute_temporary () rather
> than just relying on is_winnt ().
Done.
>
> cgf
>
VH
2005-07-22 Vaclav Haisman <v.haisman@sh.cvut.cz>
* wincap.h (wincap::has_file_attribute_temporary): New field.
(wincapc::has_file_attribute_temporary): New accessor.
* wincap.cc (wincap_unknown): Initialize
has_file_attribute_temporary field.
(wincap_95): Ditto.
(wincap_95osr2): Ditto.
(wincap_98): Ditto.
(wincap_98se): Ditto.
(wincap_me): Ditto.
(wincap_nt3): Ditto.
(wincap_nt4): Ditto.
(wincap_nt4sp4): Ditto.
(wincap_2000): Ditto.
(wincap_xp): Ditto.
(wincap_2003): Ditto.
* syscalls.cc (open_with_attributes): Rename open() to
open_with_attributes(). Add fileattr parameter and use it. Add
explicit mode_t parameter for mode. Tweak debugging
syscall_printf() calls to reflect the new parameter.
(open): Reimplement using open_with_attributes().
* fhandler.cc (fhandler_base::open): Use pc.file_attributes() when
opening disk file.
* mktemp.cc (_gettemp): Set FILE_ATTRIBUTE_TEMPORARY on WinNT
using open_with_attributes().
-------------- next part --------------
Index: fhandler.cc
===================================================================
RCS file: /cvs/src/src/winsup/cygwin/fhandler.cc,v
retrieving revision 1.239
diff -u -p -d -r1.239 fhandler.cc
--- fhandler.cc 6 Jul 2005 20:05:00 -0000 1.239
+++ fhandler.cc 22 Jul 2005 01:07:45 -0000
@@ -639,7 +639,10 @@ fhandler_base::open (int flags, mode_t m
if (flags & O_CREAT && get_device () == FH_FS)
{
- file_attributes = FILE_ATTRIBUTE_NORMAL;
+ if (pc.file_attributes () == INVALID_FILE_ATTRIBUTES)
+ file_attributes = FILE_ATTRIBUTE_NORMAL;
+ else
+ file_attributes = pc.file_attributes ();
/* If mode has no write bits set, we set the R/O attribute. */
if (!(mode & (S_IWUSR | S_IWGRP | S_IWOTH)))
file_attributes |= FILE_ATTRIBUTE_READONLY;
Index: mktemp.cc
===================================================================
RCS file: /cvs/src/src/winsup/cygwin/mktemp.cc,v
retrieving revision 1.2
diff -u -p -d -r1.2 mktemp.cc
--- mktemp.cc 25 May 2005 03:43:58 -0000 1.2
+++ mktemp.cc 22 Jul 2005 01:07:46 -0000
@@ -101,11 +101,15 @@ _gettemp(char *path, int *doopen, int do
}
}
+ DWORD const fileattr = wincap.has_file_attribute_temporary () ?
+ FILE_ATTRIBUTE_TEMPORARY : FILE_ATTRIBUTE_NORMAL;
for (;;)
{
if (doopen)
{
- if ((*doopen = open (path, O_CREAT | O_EXCL | O_RDWR, 0600)) >= 0)
+ extern int open_with_attributes (const char *, int, mode_t, DWORD);
+ if ((*doopen = open_with_attributes (path, O_CREAT | O_EXCL | O_RDWR,
+ 0600, fileattr)) >= 0)
return 1;
if (errno != EEXIST)
return 0;
Index: syscalls.cc
===================================================================
RCS file: /cvs/src/src/winsup/cygwin/syscalls.cc,v
retrieving revision 1.386
diff -u -p -d -r1.386 syscalls.cc
--- syscalls.cc 6 Jul 2005 20:05:03 -0000 1.386
+++ syscalls.cc 22 Jul 2005 01:07:47 -0000
@@ -539,18 +539,17 @@ done:
return res;
}
-/* _open */
-/* newlib's fcntl.h defines _open as taking variable args so we must
- correspond. The third arg if it exists is: mode_t mode. */
-extern "C" int
-open (const char *unix_path, int flags, ...)
+
+int open_with_attributes (const char *unix_path, int flags, mode_t mode,
+ DWORD fileattr) __attribute__ ((used));
+extern inline int
+open_with_attributes (const char *unix_path, int flags, mode_t mode,
+ DWORD fileattr)
{
int res = -1;
- va_list ap;
- mode_t mode = 0;
sig_dispatch_pending ();
- syscall_printf ("open (%s, %p)", unix_path, flags);
+ syscall_printf ("open (%s, %p, %p, %p)", unix_path, flags, mode, fileattr);
myfault efault;
if (efault.faulted (EFAULT))
/* errno already set */;
@@ -558,30 +557,36 @@ open (const char *unix_path, int flags,
set_errno (ENOENT);
else
{
- /* check for optional mode argument */
- va_start (ap, flags);
- mode = va_arg (ap, mode_t);
- va_end (ap);
-
fhandler_base *fh;
cygheap_fdnew fd;
if (fd >= 0)
{
if (!(fh = build_fh_name (unix_path, NULL, PC_SYM_FOLLOW)))
- res = -1; // errno already set
- else if (((flags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) && fh->exists ())
+ {
+ res = -1; // errno already set
+ goto out;
+ }
+ else if (((flags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
+ && fh->exists ())
{
delete fh;
res = -1;
set_errno (EEXIST);
+ goto out;
}
else if (fh->is_fs_special () && fh->device_access_denied (flags))
{
delete fh;
res = -1;
+ goto out;
}
- else if (!fh->open (flags, (mode & 07777) & ~cygheap->umask))
+
+ if (static_cast<DWORD &>(*fh) == INVALID_FILE_ATTRIBUTES)
+ static_cast<DWORD &>(*fh) = fileattr;
+ else
+ static_cast<DWORD &>(*fh) = static_cast<DWORD &>(*fh) | fileattr;
+ if (!fh->open (flags, (mode & 07777) & ~cygheap->umask))
{
delete fh;
res = -1;
@@ -595,10 +600,31 @@ open (const char *unix_path, int flags,
}
}
- syscall_printf ("%d = open (%s, %p)", res, unix_path, flags);
+ out:
+ syscall_printf ("%d = open (%s, %p, %p, %p)", res, unix_path, flags, mode,
+ fileattr);
return res;
}
+
+/* _open */
+/* newlib's fcntl.h defines _open as taking variable args so we must
+ correspond. The third arg if it exists is: mode_t mode. */
+extern "C" int
+open (const char *unix_path, int flags, ...)
+{
+ va_list ap;
+ int ret;
+ mode_t mode;
+
+ va_start (ap, flags);
+ mode = flags & O_CREAT ? va_arg (ap, mode_t) : 0;
+ ret = open_with_attributes (unix_path, flags, mode, FILE_ATTRIBUTE_NORMAL);
+ va_end (ap);
+
+ return ret;
+}
+
EXPORT_ALIAS (open, _open )
EXPORT_ALIAS (open, _open64 )
Index: wincap.cc
===================================================================
RCS file: /cvs/src/src/winsup/cygwin/wincap.cc,v
retrieving revision 1.40
diff -u -p -d -r1.40 wincap.cc
--- wincap.cc 30 Jun 2005 02:52:14 -0000 1.40
+++ wincap.cc 22 Jul 2005 01:07:48 -0000
@@ -59,7 +59,8 @@ static NO_COPY wincaps wincap_unknown =
has_extended_priority_class:false,
has_guid_volumes:false,
detect_win16_exe:true,
- has_null_console_handler_routine:false
+ has_null_console_handler_routine:false,
+ has_file_attribute_temporary:false
};
static NO_COPY wincaps wincap_95 = {
@@ -110,7 +111,8 @@ static NO_COPY wincaps wincap_95 = {
has_extended_priority_class:false,
has_guid_volumes:false,
detect_win16_exe:true,
- has_null_console_handler_routine:false
+ has_null_console_handler_routine:false,
+ has_file_attribute_temporary:false
};
static NO_COPY wincaps wincap_95osr2 = {
@@ -161,7 +163,8 @@ static NO_COPY wincaps wincap_95osr2 = {
has_extended_priority_class:false,
has_guid_volumes:false,
detect_win16_exe:true,
- has_null_console_handler_routine:false
+ has_null_console_handler_routine:false,
+ has_file_attribute_temporary:false
};
static NO_COPY wincaps wincap_98 = {
@@ -212,7 +215,8 @@ static NO_COPY wincaps wincap_98 = {
has_extended_priority_class:false,
has_guid_volumes:false,
detect_win16_exe:true,
- has_null_console_handler_routine:false
+ has_null_console_handler_routine:false,
+ has_file_attribute_temporary:false
};
static NO_COPY wincaps wincap_98se = {
@@ -263,7 +267,8 @@ static NO_COPY wincaps wincap_98se = {
has_extended_priority_class:false,
has_guid_volumes:false,
detect_win16_exe:true,
- has_null_console_handler_routine:false
+ has_null_console_handler_routine:false,
+ has_file_attribute_temporary:false
};
static NO_COPY wincaps wincap_me = {
@@ -314,7 +319,8 @@ static NO_COPY wincaps wincap_me = {
has_extended_priority_class:false,
has_guid_volumes:false,
detect_win16_exe:true,
- has_null_console_handler_routine:false
+ has_null_console_handler_routine:false,
+ has_file_attribute_temporary:false
};
static NO_COPY wincaps wincap_nt3 = {
@@ -365,7 +371,8 @@ static NO_COPY wincaps wincap_nt3 = {
has_extended_priority_class:false,
has_guid_volumes:false,
detect_win16_exe:false,
- has_null_console_handler_routine:true
+ has_null_console_handler_routine:true,
+ has_file_attribute_temporary:true
};
static NO_COPY wincaps wincap_nt4 = {
@@ -416,7 +423,8 @@ static NO_COPY wincaps wincap_nt4 = {
has_extended_priority_class:false,
has_guid_volumes:false,
detect_win16_exe:false,
- has_null_console_handler_routine:true
+ has_null_console_handler_routine:true,
+ has_file_attribute_temporary:true
};
static NO_COPY wincaps wincap_nt4sp4 = {
@@ -467,7 +475,8 @@ static NO_COPY wincaps wincap_nt4sp4 = {
has_extended_priority_class:false,
has_guid_volumes:false,
detect_win16_exe:false,
- has_null_console_handler_routine:true
+ has_null_console_handler_routine:true,
+ has_file_attribute_temporary:true
};
static NO_COPY wincaps wincap_2000 = {
@@ -518,7 +527,8 @@ static NO_COPY wincaps wincap_2000 = {
has_extended_priority_class:true,
has_guid_volumes:true,
detect_win16_exe:false,
- has_null_console_handler_routine:true
+ has_null_console_handler_routine:true,
+ has_file_attribute_temporary:true
};
static NO_COPY wincaps wincap_xp = {
@@ -569,7 +579,8 @@ static NO_COPY wincaps wincap_xp = {
has_extended_priority_class:true,
has_guid_volumes:true,
detect_win16_exe:false,
- has_null_console_handler_routine:true
+ has_null_console_handler_routine:true,
+ has_file_attribute_temporary:true
};
static NO_COPY wincaps wincap_2003 = {
@@ -620,7 +631,8 @@ static NO_COPY wincaps wincap_2003 = {
has_extended_priority_class:true,
has_guid_volumes:true,
detect_win16_exe:false,
- has_null_console_handler_routine:true
+ has_null_console_handler_routine:true,
+ has_file_attribute_temporary:true
};
wincapc wincap;
Index: wincap.h
===================================================================
RCS file: /cvs/src/src/winsup/cygwin/wincap.h,v
retrieving revision 1.32
diff -u -p -d -r1.32 wincap.h
--- wincap.h 30 Jun 2005 02:52:14 -0000 1.32
+++ wincap.h 22 Jul 2005 01:07:48 -0000
@@ -61,6 +61,7 @@ struct wincaps
unsigned has_guid_volumes : 1;
unsigned detect_win16_exe : 1;
unsigned has_null_console_handler_routine : 1;
+ unsigned has_file_attribute_temporary : 1;
};
class wincapc
@@ -126,6 +127,7 @@ public:
bool IMPLEMENT (has_guid_volumes)
bool IMPLEMENT (detect_win16_exe)
bool IMPLEMENT (has_null_console_handler_routine)
+ bool IMPLEMENT (has_file_attribute_temporary)
#undef IMPLEMENT
};
-------------- next part --------------
2005-07-22 Vaclav Haisman <v.haisman@sh.cvut.cz>
* wincap.h (wincap::has_file_attribute_temporary): New field.
(wincapc::has_file_attribute_temporary): New accessor.
* wincap.cc (wincap_unknown): Initialize
has_file_attribute_temporary field.
(wincap_95): Ditto.
(wincap_95osr2): Ditto.
(wincap_98): Ditto.
(wincap_98se): Ditto.
(wincap_me): Ditto.
(wincap_nt3): Ditto.
(wincap_nt4): Ditto.
(wincap_nt4sp4): Ditto.
(wincap_2000): Ditto.
(wincap_xp): Ditto.
(wincap_2003): Ditto.
* syscalls.cc (open_with_attributes): Rename open() to
open_with_attributes(). Add fileattr parameter and use it. Add
explicit mode_t parameter for mode. Tweak debugging
syscall_printf() calls to reflect the new parameter.
(open): Reimplement using open_with_attributes().
* fhandler.cc (fhandler_base::open): Use pc.file_attributes() when
opening disk file.
* mktemp.cc (_gettemp): Set FILE_ATTRIBUTE_TEMPORARY on WinNT
using open_with_attributes().
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