Adding upstream version 14.2.upstream/14.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 49 insertions, 0 deletions

diff --git a/src/pulsecore/memtrap.h b/src/pulsecore/memtrap.h
new file mode 100644
index 0000000..cf3e99e
--- /dev/null
+++ b/src/pulsecore/memtrap.h
@@ -0,0 +1,49 @@
+#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