diff options
| author | Lukas Stockner <lukasstockner97> | 2021-01-15 00:02:48 +0300 |
|---|---|---|
| committer | Lukas Stockner <lukas.stockner@freenet.de> | 2021-01-15 00:03:29 +0300 |
| commit | 0f2ae614a17a7c231b2a6e129633a99d9d1f12e3 (patch) | |
| tree | 7d8b8f5873b96ce115cb13e80e6b78e92728a7e1 /intern/guardedalloc/mmap_win.h | |
| parent | 33a558bf21579b57f94329bc98d87f28e178c17a (diff) | |
Use mmap() IO for reading uncompressed .blends
Instead of submitting tons of tiny IO syscalls, we can speed things up
significantly by `mmap`ing the .blend file into virtual memory and directly
accessing it.
In my local testing, this speeds up loading the Dweebs file with all its
linked files from 19sec to 10sec (on Linux).
As far as I can see, this should be supported on Linux, OSX and BSD.
For Windows, a second code path uses `CreateFileMapping` and
`MapViewOfFile` to achieve the same result.
Reviewed By: mont29, brecht
Differential Revision: https://developer.blender.org/D8246
Diffstat (limited to 'intern/guardedalloc/mmap_win.h')
| -rw-r--r-- | intern/guardedalloc/mmap_win.h | 50 |
1 files changed, 0 insertions, 50 deletions
diff --git a/intern/guardedalloc/mmap_win.h b/intern/guardedalloc/mmap_win.h deleted file mode 100644 index c0cbaa0e512..00000000000 --- a/intern/guardedalloc/mmap_win.h +++ /dev/null @@ -1,50 +0,0 @@ -/* - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software Foundation, - * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. - * - * The Original Code is Copyright (C) 2008 Blender Foundation. - * All rights reserved. - */ - -/** \file - * \ingroup MEM - */ - -#ifndef __MMAP_WIN_H__ -#define __MMAP_WIN_H__ - -#define PROT_NONE 0 -#define PROT_READ 1 -#define PROT_WRITE 2 -#define PROT_EXEC 4 - -#define MAP_FILE 0 -#define MAP_SHARED 1 -#define MAP_PRIVATE 2 -#define MAP_TYPE 0xF -#define MAP_FIXED 0x10 -#define MAP_ANONYMOUS 0x20 -#define MAP_ANON MAP_ANONYMOUS - -#define MAP_FAILED ((void *)-1) - -/* needed for uintptr_t, exception, dont use BLI anywhere else in MEM_* */ -#include "../../source/blender/blenlib/BLI_sys_types.h" - -#include <sys/types.h> - -void *mmap(void *start, size_t len, int prot, int flags, int fd, off_t offset); -intptr_t munmap(void *ptr, size_t size); - -#endif |