mirror of
https://gitlab.freedesktop.org/pipewire/pipewire.git
synced 2025-11-03 09:01:54 -05:00
9d4048e73a
Enable the header metadata so that we have timestamps again. Rework allocation in the link a little. Reuse previously allocated buffers when possible. Keep track of where the buffers was allocated. Make some more convenience functions to initialize buffer headers. Make it so that we move allocations to the app. Make some helpers to make memfd memory in pinos now that we will be able to do all allocation there.
91 lines
2.5 KiB
C
91 lines
2.5 KiB
C
/* Pinos
|
|
* Copyright (C) 2016 Wim Taymans <wim.taymans@gmail.com>
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#include <string.h>
|
|
#include <stddef.h>
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
#include <sys/mman.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
|
|
#include "memfd-wrappers.h"
|
|
|
|
#include <pinos/server/utils.h>
|
|
|
|
gboolean
|
|
pinos_memblock_alloc (PinosMemblockFlags flags,
|
|
gsize size,
|
|
PinosMemblock *mem)
|
|
{
|
|
g_return_val_if_fail (mem != NULL, FALSE);
|
|
g_return_val_if_fail (size > 0, FALSE);
|
|
|
|
mem->flags = flags;
|
|
mem->size = size;
|
|
|
|
if (flags & PINOS_MEMBLOCK_FLAG_WITH_FD) {
|
|
mem->fd = memfd_create ("pinos-memfd", MFD_CLOEXEC | MFD_ALLOW_SEALING);
|
|
|
|
if (ftruncate (mem->fd, size) < 0) {
|
|
g_warning ("Failed to truncate temporary file: %s", strerror (errno));
|
|
close (mem->fd);
|
|
return FALSE;
|
|
}
|
|
if (flags & PINOS_MEMBLOCK_FLAG_SEAL) {
|
|
unsigned int seals = F_SEAL_GROW | F_SEAL_SHRINK | F_SEAL_SEAL;
|
|
if (fcntl (mem->fd, F_ADD_SEALS, seals) == -1) {
|
|
g_warning ("Failed to add seals: %s", strerror (errno));
|
|
}
|
|
}
|
|
if (flags & PINOS_MEMBLOCK_FLAG_MAP_READWRITE) {
|
|
int prot = 0;
|
|
|
|
if (flags & PINOS_MEMBLOCK_FLAG_MAP_READ)
|
|
prot |= PROT_READ;
|
|
if (flags & PINOS_MEMBLOCK_FLAG_MAP_WRITE)
|
|
prot |= PROT_WRITE;
|
|
|
|
mem->ptr = mmap (NULL, size, prot, MAP_SHARED, mem->fd, 0);
|
|
} else {
|
|
mem->ptr = NULL;
|
|
}
|
|
} else {
|
|
mem->ptr = g_malloc (size);
|
|
mem->fd = -1;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
void
|
|
pinos_memblock_free (PinosMemblock *mem)
|
|
{
|
|
g_return_if_fail (mem != NULL);
|
|
|
|
if (mem->flags & PINOS_MEMBLOCK_FLAG_WITH_FD) {
|
|
if (mem->ptr)
|
|
munmap (mem->ptr, mem->size);
|
|
if (mem->fd != -1)
|
|
close (mem->fd);
|
|
} else {
|
|
g_free (mem->ptr);
|
|
}
|
|
mem->ptr = NULL;
|
|
mem->fd = -1;
|
|
}
|