From 18e975fc5ef68a89875c77974570884b9214a009 Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Mon, 20 Jul 2009 17:34:17 +0200 Subject: merged --- src/pulsecore/memtrap.h | 51 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 src/pulsecore/memtrap.h (limited to 'src/pulsecore/memtrap.h') diff --git a/src/pulsecore/memtrap.h b/src/pulsecore/memtrap.h new file mode 100644 index 00000000..fa38da58 --- /dev/null +++ b/src/pulsecore/memtrap.h @@ -0,0 +1,51 @@ +#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, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 + USA. +***/ + +#include + +#include + +/* 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); + +pa_bool_t pa_memtrap_is_good(pa_memtrap *m); + +void pa_memtrap_install(void); + +#endif -- cgit