mesa: copy anon_file from Mesa

Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
Reviewed-by: Yiwei Zhang <zzyiwei@chromium.org>
Reviewed-by: Ryan Neph <ryanneph@google.com>
macos/master
Chia-I Wu 3 years ago
parent 778ad42253
commit 3464655e84
  1. 1
      config.h.meson
  2. 2
      meson.build
  3. 1
      src/mesa/meson.build
  4. 166
      src/mesa/util/anon_file.c
  5. 33
      src/mesa/util/anon_file.h

@ -23,6 +23,7 @@
#mesondefine HAVE_FUNC_ATTRIBUTE_UNUSED
#mesondefine HAVE_FUNC_ATTRIBUTE_WARN_UNUSED_RESULT
#mesondefine HAVE_FUNC_ATTRIBUTE_WEAK
#mesondefine HAVE_MEMFD_CREATE
#mesondefine HAVE_STRTOK_R
#mesondefine HAVE_TIMESPEC_GET
#mesondefine HAVE_SYS_UIO_H

@ -148,7 +148,7 @@ foreach a : supported_function_attributes
conf_data.set('HAVE_FUNC_ATTRIBUTE_@0@'.format(a.to_upper()), 1)
endforeach
foreach f : ['strtok_r', 'timespec_get']
foreach f : ['memfd_create', 'strtok_r', 'timespec_get']
if cc.has_function(f)
conf_data.set('HAVE_@0@'.format(f.to_upper()), 1)
endif

@ -4,6 +4,7 @@
inc_mesa = include_directories('.', 'compat', 'pipe', 'util')
files_mesa = files(
'util/anon_file.c',
'util/bitscan.c',
'util/hash_table.c',
'util/os_file.c',

@ -0,0 +1,166 @@
/*
* Copyright © 2012 Collabora, Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
/*
* Based on weston shared/os-compatibility.c
*/
#ifndef _WIN32
#include "anon_file.h"
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <stdlib.h>
#if defined(HAVE_MEMFD_CREATE) || defined(__FreeBSD__) || defined(__OpenBSD__)
#include <sys/mman.h>
#elif defined(ANDROID)
#include <sys/syscall.h>
#include <linux/memfd.h>
#else
#include <stdio.h>
#endif
#if !(defined(__FreeBSD__) || defined(HAVE_MEMFD_CREATE) || defined(HAVE_MKOSTEMP) || defined(ANDROID))
static int
set_cloexec_or_close(int fd)
{
long flags;
if (fd == -1)
return -1;
flags = fcntl(fd, F_GETFD);
if (flags == -1)
goto err;
if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) == -1)
goto err;
return fd;
err:
close(fd);
return -1;
}
#endif
#if !(defined(__FreeBSD__) || defined(HAVE_MEMFD_CREATE) || defined(ANDROID))
static int
create_tmpfile_cloexec(char *tmpname)
{
int fd;
#ifdef HAVE_MKOSTEMP
fd = mkostemp(tmpname, O_CLOEXEC);
#else
fd = mkstemp(tmpname);
#endif
if (fd < 0) {
return fd;
}
#ifndef HAVE_MKOSTEMP
fd = set_cloexec_or_close(fd);
#endif
unlink(tmpname);
return fd;
}
#endif
/*
* Create a new, unique, anonymous file of the given size, and
* return the file descriptor for it. The file descriptor is set
* CLOEXEC. The file is immediately suitable for mmap()'ing
* the given size at offset zero.
*
* An optional name for debugging can be provided as the second argument.
*
* The file should not have a permanent backing store like a disk,
* but may have if XDG_RUNTIME_DIR is not properly implemented in OS.
*
* If memfd or SHM_ANON is supported, the filesystem is not touched at all.
* Otherwise, the file name is deleted from the file system.
*
* The file is suitable for buffer sharing between processes by
* transmitting the file descriptor over Unix sockets using the
* SCM_RIGHTS methods.
*/
int
os_create_anonymous_file(off_t size, const char *debug_name)
{
int fd, ret;
#if defined(HAVE_MEMFD_CREATE)
if (!debug_name)
debug_name = "mesa-shared";
fd = memfd_create(debug_name, MFD_CLOEXEC | MFD_ALLOW_SEALING);
#elif defined(ANDROID)
if (!debug_name)
debug_name = "mesa-shared";
fd = syscall(SYS_memfd_create, debug_name, MFD_CLOEXEC | MFD_ALLOW_SEALING);
#elif defined(__FreeBSD__)
fd = shm_open(SHM_ANON, O_CREAT | O_RDWR | O_CLOEXEC, 0600);
#elif defined(__OpenBSD__)
char template[] = "/tmp/mesa-XXXXXXXXXX";
fd = shm_mkstemp(template);
if (fd != -1)
shm_unlink(template);
#else
const char *path;
char *name;
path = getenv("XDG_RUNTIME_DIR");
if (!path) {
errno = ENOENT;
return -1;
}
if (debug_name)
asprintf(&name, "%s/mesa-shared-%s-XXXXXX", path, debug_name);
else
asprintf(&name, "%s/mesa-shared-XXXXXX", path);
if (!name)
return -1;
fd = create_tmpfile_cloexec(name);
free(name);
#endif
if (fd < 0)
return -1;
ret = ftruncate(fd, size);
if (ret < 0) {
close(fd);
return -1;
}
return fd;
}
#endif

@ -0,0 +1,33 @@
/*
* Copyright © 2012 Collabora, Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef _ANON_FILE_H_
#define _ANON_FILE_H_
#include <sys/types.h>
int os_create_anonymous_file(off_t size, const char *debug_name);
#endif
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