Adding upstream version 14.2.upstream/14.2upstream

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

1 files changed, 56 insertions, 0 deletions

diff --git a/src/pulsecore/memchunk.h b/src/pulsecore/memchunk.h
new file mode 100644
index 0000000..2b19712
--- /dev/null
+++ b/src/pulsecore/memchunk.h
@@ -0,0 +1,56 @@
+#ifndef foomemchunkhfoo
+#define foomemchunkhfoo
+
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2004-2006 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/>.
+***/
+
+typedef struct pa_memchunk pa_memchunk;
+
+#include <pulsecore/memblock.h>
+
+/* A memchunk describes a part of a memblock. In contrast to the memblock, a
+ * memchunk is not allocated dynamically or reference counted, instead
+ * it is usually stored on the stack and copied around */
+
+struct pa_memchunk {
+    pa_memblock *memblock;
+    size_t index, length;
+};
+
+/* Make a memchunk writable, i.e. make sure that the caller may have
+ * exclusive access to the memblock and it is not read-only. If needed
+ * the memblock in the structure is replaced by a copy. If min is not
+ * 0 it is made sure that the returned memblock is at least of the
+ * specified size, i.e. is enlarged if necessary. */
+pa_memchunk* pa_memchunk_make_writable(pa_memchunk *c, size_t min);
+
+/* Invalidate a memchunk. This does not free the containing memblock,
+ * but sets all members to zero. */
+pa_memchunk* pa_memchunk_reset(pa_memchunk *c);
+
+/* Map a memory chunk back into memory if it was swapped out */
+pa_memchunk *pa_memchunk_will_need(const pa_memchunk *c);
+
+/* Copy the data in the src memchunk to the dst memchunk */
+pa_memchunk* pa_memchunk_memcpy(pa_memchunk *dst, pa_memchunk *src);
+
+/* Return true if any field is set != 0 */
+bool pa_memchunk_isset(pa_memchunk *c);
+
+#endif