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#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
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