mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-11-01 22:58:47 -04:00
ee2db62277
Color global mempools with a special mark. This special marking is needed for handling memfd-backed pools. To avoid fd leaks, memfd pools are registered with the connection pstream to create an ID<->memfd mapping on both PA endpoints. Such memory regions are then always referenced by their IDs and never by their fds, and so their fds can be safely closed later. Unfortunately this scheme cannot work with global pools since the registration ID<->memfd mechanism needs to happen for each newly connected client, and thus the need for a more special handling. That is, for the pool's fd to be always open :-( Almost all mempools are now created on a per-client basis. The only exception is the pa_core's mempool which is still shared between all clients of the system. Signed-off-by: Ahmed S. Darwish <darwish.07@gmail.com>
61 lines
1.8 KiB
C
61 lines
1.8 KiB
C
#ifndef foopulseshmhfoo
|
|
#define foopulseshmhfoo
|
|
|
|
/***
|
|
This file is part of PulseAudio.
|
|
|
|
Copyright 2006 Lennart Poettering
|
|
|
|
PulseAudio is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU Lesser General Public License as
|
|
published by the Free Software Foundation; either version 2.1 of the
|
|
License, or (at your option) any later version.
|
|
|
|
PulseAudio 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
|
|
***/
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include <pulsecore/macro.h>
|
|
#include <pulsecore/mem.h>
|
|
|
|
typedef struct pa_shm {
|
|
pa_mem_type_t type;
|
|
unsigned id;
|
|
void *ptr;
|
|
size_t size;
|
|
|
|
/* Only for type = PA_MEM_TYPE_SHARED_POSIX */
|
|
bool do_unlink:1;
|
|
|
|
/* Only for type = PA_MEM_TYPE_SHARED_MEMFD
|
|
*
|
|
* To avoid fd leaks, we keep this fd open only until we pass it
|
|
* to the other PA endpoint over unix domain socket.
|
|
*
|
|
* When we don't have ownership for the memfd fd in question (e.g.
|
|
* pa_shm_attach()), or the file descriptor has now been closed,
|
|
* this is set to -1.
|
|
*
|
|
* For the special case of a global mempool, we keep this fd
|
|
* always open. Check comments on top of pa_mempool_new() for
|
|
* rationale. */
|
|
int fd;
|
|
} pa_shm;
|
|
|
|
int pa_shm_create_rw(pa_shm *m, pa_mem_type_t type, size_t size, mode_t mode);
|
|
int pa_shm_attach(pa_shm *m, pa_mem_type_t type, unsigned id, int memfd_fd, bool writable);
|
|
|
|
void pa_shm_punch(pa_shm *m, size_t offset, size_t size);
|
|
|
|
void pa_shm_free(pa_shm *m);
|
|
|
|
int pa_shm_cleanup(void);
|
|
|
|
#endif
|