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wbemprox: Optimize a common Win32_Directory query.

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This commit is contained in:
Hans Leidekker 2013-06-04 13:26:32 +02:00 committed by Alexandre Julliard
parent a6dc4906de
commit 8e1aa4358a
1 changed files with 139 additions and 37 deletions
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176
dlls/wbemprox/builtin.c
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@ -839,37 +839,6 @@ static enum fill_status fill_compsys( struct table *table, const struct expr *co
return status;
}
static WCHAR *get_filesystem( const WCHAR *root )
{
static const WCHAR ntfsW[] = {'N','T','F','S',0};
WCHAR buffer[MAX_PATH + 1];
if (GetVolumeInformationW( root, NULL, 0, NULL, NULL, NULL, buffer, MAX_PATH + 1 ))
return heap_strdupW( buffer );
return heap_strdupW( ntfsW );
}
static UINT64 get_freespace( const WCHAR *dir, UINT64 *disksize )
{
WCHAR root[] = {'\\','\\','.','\\','A',':',0};
ULARGE_INTEGER free;
DISK_GEOMETRY_EX info;
HANDLE handle;
free.QuadPart = 512 * 1024 * 1024;
GetDiskFreeSpaceExW( dir, NULL, NULL, &free );
root[4] = dir[0];
handle = CreateFileW( root, GENERIC_READ, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, 0 );
if (handle != INVALID_HANDLE_VALUE)
{
if (DeviceIoControl( handle, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX, NULL, 0, &info, sizeof(info), NULL, NULL ))
*disksize = info.DiskSize.QuadPart;
CloseHandle( handle );
}
return free.QuadPart;
}
struct dirstack
{
WCHAR **dirs;
@ -899,10 +868,16 @@ static struct dirstack *alloc_dirstack( UINT size )
return dirstack;
}
static void free_dirstack( struct dirstack *dirstack )
static void clear_dirstack( struct dirstack *dirstack )
{
UINT i;
for (i = 0; i < dirstack->num_dirs; i++) heap_free( dirstack->dirs[i] );
dirstack->num_dirs = 0;
}
static void free_dirstack( struct dirstack *dirstack )
{
clear_dirstack( dirstack );
heap_free( dirstack->dirs );
heap_free( dirstack->len_dirs );
heap_free( dirstack );
@ -912,6 +887,8 @@ static BOOL push_dir( struct dirstack *dirstack, WCHAR *dir, UINT len )
{
UINT size, i = dirstack->num_dirs;
if (!dir) return FALSE;
if (i == dirstack->num_allocated)
{
WCHAR **tmp;
@ -957,7 +934,7 @@ static WCHAR *build_glob( WCHAR drive, const WCHAR *path, UINT len )
ret[i++] = drive;
ret[i++] = ':';
ret[i++] = '\\';
if (path)
if (path && len)
{
memcpy( ret + i, path, len * sizeof(WCHAR) );
i += len;
@ -968,7 +945,7 @@ static WCHAR *build_glob( WCHAR drive, const WCHAR *path, UINT len )
return ret;
}
static WCHAR *build_dirname( WCHAR drive, const WCHAR *path )
static WCHAR *build_name( WCHAR drive, const WCHAR *path )
{
UINT i = 0, len = 0;
const WCHAR *p;
@ -997,6 +974,90 @@ static WCHAR *build_dirname( WCHAR drive, const WCHAR *path )
return ret;
}
static WCHAR *build_dirname( const WCHAR *path, UINT *ret_len )
{
const WCHAR *p = path, *start;
UINT len, i;
WCHAR *ret;
if (!isalphaW( p[0] ) || p[1] != ':' || p[2] != '\\' || p[3] != '\\' || !p[4]) return NULL;
start = path + 4;
len = strlenW( start );
p = start + len - 1;
if (*p == '\\') return NULL;
while (p >= start && *p != '\\') { len--; p--; };
while (p >= start && *p == '\\') { len--; p--; };
if (!(ret = heap_alloc( (len + 1) * sizeof(WCHAR) ))) return NULL;
for (i = 0, p = start; p < start + len; p++)
{
if (p[0] == '\\' && p[1] == '\\')
{
ret[i++] = '\\';
p++;
}
else ret[i++] = *p;
}
ret[i] = 0;
*ret_len = i;
return ret;
}
static BOOL seen_dir( struct dirstack *dirstack, const WCHAR *path )
{
UINT i;
for (i = 0; i < dirstack->num_dirs; i++) if (!strcmpW( dirstack->dirs[i], path )) return TRUE;
return FALSE;
}
/* optimize queries of the form WHERE Name='...' [OR Name='...']* */
static UINT seed_dirs( struct dirstack *dirstack, const struct expr *cond, WCHAR root, UINT *count )
{
const struct expr *left = cond->u.expr.left, *right = cond->u.expr.right;
if (cond->type != EXPR_COMPLEX) return *count = 0;
if (cond->u.expr.op == OP_EQ)
{
UINT len;
WCHAR *path;
const WCHAR *str = NULL;
if (left->type == EXPR_PROPVAL && right->type == EXPR_SVAL &&
!strcmpW( left->u.propval->name, prop_nameW ) &&
toupperW( right->u.sval[0] ) == toupperW( root ))
{
str = right->u.sval;
}
else if (left->type == EXPR_SVAL && right->type == EXPR_PROPVAL &&
!strcmpW( right->u.propval->name, prop_nameW ) &&
toupperW( left->u.sval[0] ) == toupperW( root ))
{
str = left->u.sval;
}
if (str && (path = build_dirname( str, &len )))
{
if (seen_dir( dirstack, path ))
{
heap_free( path );
return ++*count;
}
else if (push_dir( dirstack, path, len )) return ++*count;
heap_free( path );
return *count = 0;
}
}
else if (cond->u.expr.op == OP_OR)
{
UINT left_count = 0, right_count = 0;
if (!(seed_dirs( dirstack, left, root, &left_count ))) return *count = 0;
if (!(seed_dirs( dirstack, right, root, &right_count ))) return *count = 0;
return *count += left_count + right_count;
}
return *count = 0;
}
static WCHAR *append_path( const WCHAR *path, const WCHAR *segment, UINT *len )
{
UINT len_path = 0, len_segment = strlenW( segment );
@ -1005,7 +1066,7 @@ static WCHAR *append_path( const WCHAR *path, const WCHAR *segment, UINT *len )
*len = 0;
if (path) len_path = strlenW( path );
if (!(ret = heap_alloc( (len_path + len_segment + 2) * sizeof(WCHAR) ))) return NULL;
if (path)
if (path && len_path)
{
memcpy( ret, path, len_path * sizeof(WCHAR) );
ret[len_path] = '\\';
@ -1021,7 +1082,7 @@ static enum fill_status fill_directory( struct table *table, const struct expr *
{
static const WCHAR dotW[] = {'.',0}, dotdotW[] = {'.','.',0};
struct record_directory *rec;
UINT i, len, row = 0, offset = 0, count = 4;
UINT i, len, row = 0, offset = 0, count = 4, num_expected_rows;
WCHAR *glob = NULL, *path = NULL, *new_path, root[] = {'A',':','\\',0};
DWORD drives = GetLogicalDrives();
WIN32_FIND_DATAW data;
@ -1038,6 +1099,9 @@ static enum fill_status fill_directory( struct table *table, const struct expr *
root[0] = 'A' + i;
if (GetDriveTypeW( root ) != DRIVE_FIXED) continue;
num_expected_rows = 0;
if (!seed_dirs( dirstack, cond, root[0], &num_expected_rows )) clear_dirstack( dirstack );
for (;;)
{
path = pop_dir( dirstack, &len );
@ -1074,12 +1138,19 @@ static enum fill_status fill_directory( struct table *table, const struct expr *
}
rec = (struct record_directory *)(table->data + offset);
rec->accessmask = FILE_ALL_ACCESS;
rec->name = build_dirname( root[0], new_path );
rec->name = build_name( root[0], new_path );
if (!match_row( table, row, cond, &status ))
{
free_row_values( table, row );
continue;
}
else if (num_expected_rows && row == num_expected_rows - 1)
{
row++;
FindClose( handle );
status = FILL_STATUS_FILTERED;
goto done;
}
offset += sizeof(*rec);
row++;
}
@ -1102,6 +1173,37 @@ done:
return status;
}
static WCHAR *get_filesystem( const WCHAR *root )
{
static const WCHAR ntfsW[] = {'N','T','F','S',0};
WCHAR buffer[MAX_PATH + 1];
if (GetVolumeInformationW( root, NULL, 0, NULL, NULL, NULL, buffer, MAX_PATH + 1 ))
return heap_strdupW( buffer );
return heap_strdupW( ntfsW );
}
static UINT64 get_freespace( const WCHAR *dir, UINT64 *disksize )
{
WCHAR root[] = {'\\','\\','.','\\','A',':',0};
ULARGE_INTEGER free;
DISK_GEOMETRY_EX info;
HANDLE handle;
free.QuadPart = 512 * 1024 * 1024;
GetDiskFreeSpaceExW( dir, NULL, NULL, &free );
root[4] = dir[0];
handle = CreateFileW( root, GENERIC_READ, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, 0 );
if (handle != INVALID_HANDLE_VALUE)
{
if (DeviceIoControl( handle, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX, NULL, 0, &info, sizeof(info), NULL, NULL ))
*disksize = info.DiskSize.QuadPart;
CloseHandle( handle );
}
return free.QuadPart;
}
static enum fill_status fill_diskpartition( struct table *table, const struct expr *cond )
{
static const WCHAR fmtW[] =