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https://gitlab.freedesktop.org/pipewire/pipewire.git
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b208e8b690
Add maxsize to bufferdata in case the memory size can be variable such as with encoded formats. Copy new size in the proxy.
110 lines
3 KiB
C
110 lines
3 KiB
C
/* Pinos
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* Copyright (C) 2016 Wim Taymans <wim.taymans@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include <string.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <errno.h>
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#include <sys/mman.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include "memfd-wrappers.h"
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#include <pinos/server/utils.h>
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#undef USE_MEMFD
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gboolean
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pinos_memblock_alloc (PinosMemblockFlags flags,
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gsize size,
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PinosMemblock *mem)
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{
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g_return_val_if_fail (mem != NULL, FALSE);
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g_return_val_if_fail (size > 0, FALSE);
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mem->flags = flags;
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mem->size = size;
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if (flags & PINOS_MEMBLOCK_FLAG_WITH_FD) {
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#ifdef USE_MEMFD
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mem->fd = memfd_create ("pinos-memfd", MFD_CLOEXEC | MFD_ALLOW_SEALING);
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if (mem->fd == -1) {
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fprintf (stderr, "Failed to create memfd: %s\n", strerror (errno));
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return FALSE;
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}
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#else
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char filename[] = "/dev/shm/spa-tmpfile.XXXXXX";
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mem->fd = mkostemp (filename, O_CLOEXEC);
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if (mem->fd == -1) {
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fprintf (stderr, "Failed to create temporary file: %s\n", strerror (errno));
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return FALSE;
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}
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unlink (filename);
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#endif
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if (ftruncate (mem->fd, size) < 0) {
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g_warning ("Failed to truncate temporary file: %s", strerror (errno));
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close (mem->fd);
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return FALSE;
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}
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#ifdef USE_MEMFD
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if (flags & PINOS_MEMBLOCK_FLAG_SEAL) {
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unsigned int seals = F_SEAL_GROW | F_SEAL_SHRINK | F_SEAL_SEAL;
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if (fcntl (mem->fd, F_ADD_SEALS, seals) == -1) {
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g_warning ("Failed to add seals: %s", strerror (errno));
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}
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}
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#endif
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if (flags & PINOS_MEMBLOCK_FLAG_MAP_READWRITE) {
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int prot = 0;
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if (flags & PINOS_MEMBLOCK_FLAG_MAP_READ)
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prot |= PROT_READ;
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if (flags & PINOS_MEMBLOCK_FLAG_MAP_WRITE)
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prot |= PROT_WRITE;
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mem->ptr = mmap (NULL, size, prot, MAP_SHARED, mem->fd, 0);
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} else {
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mem->ptr = NULL;
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}
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} else {
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mem->ptr = g_malloc (size);
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mem->fd = -1;
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}
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return TRUE;
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}
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void
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pinos_memblock_free (PinosMemblock *mem)
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{
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g_return_if_fail (mem != NULL);
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if (mem->flags & PINOS_MEMBLOCK_FLAG_WITH_FD) {
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if (mem->ptr)
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munmap (mem->ptr, mem->size);
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if (mem->fd != -1)
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close (mem->fd);
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} else {
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g_free (mem->ptr);
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}
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mem->ptr = NULL;
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mem->fd = -1;
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}
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