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#ifndef foopulsecorememtraphfoo
#define foopulsecorememtraphfoo
/***
This file is part of PulseAudio.
Copyright 2009 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
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>
/* This subsystem will trap SIGBUS on specific memory regions. The
* regions will be remapped to anonymous memory (i.e. writable NUL
* bytes) on SIGBUS, so that execution of the main program can
* continue though with memory having changed beneath its hands. With
* pa_memtrap_is_good() it is possible to query if a memory region is
* still 'good' i.e. no SIGBUS has happened yet for it.
*
* Intended usage is to handle memory mapped in which is controlled by
* other processes that might execute ftruncate() or when mapping inb
* hardware resources that might get invalidated when unplugged. */
typedef struct pa_memtrap pa_memtrap;
pa_memtrap* pa_memtrap_add(const void *start, size_t size);
pa_memtrap *pa_memtrap_update(pa_memtrap *m, const void *start, size_t size);
void pa_memtrap_remove(pa_memtrap *m);
bool pa_memtrap_is_good(pa_memtrap *m);
void pa_memtrap_install(void);
#endif
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