mirrors/pulseaudio
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git synced 2025-11-11 13:30:02 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions

memimport: Support memfd blocks

Browse source 
To transfer memfd-backed blocks without passing their fd every time,
thus minimizing overhead and avoiding fd leaks, a command is sent
with the memfd fd as ancil data very early on.

This command has an ID that uniquely identifies the memfd region.
Further memfd block references are then exclusively done using this
ID.

This commit implements the details of such 'permanent' mappings on
the receiving end, using memimport segments.

Suggested-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Ahmed S. Darwish <darwish.07@gmail.com>
This commit is contained in:
Ahmed S. Darwish 2016-03-13 01:07:27 +02:00 • committed by David Henningsson
parent 73e86b1cb1
commit f8714af56b
6 changed files with 113 additions and 23 deletions
Download patch file Download diff file Expand all files Collapse all files

9
src/tests/memblock-test.c
View file

@ -74,6 +74,7 @@ START_TEST (memblock_test) {
pa_memblock *mb_a, *mb_b, *mb_c;
int r, i;
pa_memblock* blocks[5];
pa_mem_type_t mem_type;
uint32_t id, shm_id;
size_t offset, size;
char *x;
@ -122,22 +123,22 @@ START_TEST (memblock_test) {
import_c = pa_memimport_new(pool_c, release_cb, (void*) "C");
fail_unless(import_b != NULL);
r = pa_memexport_put(export_a, mb_a, &id, &shm_id, &offset, &size);
r = pa_memexport_put(export_a, mb_a, &mem_type, &id, &shm_id, &offset, &size);
fail_unless(r >= 0);
fail_unless(shm_id == id_a);
pa_log("A: Memory block exported as %u", id);
mb_b = pa_memimport_get(import_b, id, shm_id, offset, size, false);
mb_b = pa_memimport_get(import_b, PA_MEM_TYPE_SHARED_POSIX, id, shm_id, offset, size, false);
fail_unless(mb_b != NULL);
r = pa_memexport_put(export_b, mb_b, &id, &shm_id, &offset, &size);
r = pa_memexport_put(export_b, mb_b, &mem_type, &id, &shm_id, &offset, &size);
fail_unless(r >= 0);
fail_unless(shm_id == id_a || shm_id == id_b);
pa_memblock_unref(mb_b);
pa_log("B: Memory block exported as %u", id);
mb_c = pa_memimport_get(import_c, id, shm_id, offset, size, false);
mb_c = pa_memimport_get(import_c, PA_MEM_TYPE_SHARED_POSIX, id, shm_id, offset, size, false);
fail_unless(mb_c != NULL);
x = pa_memblock_acquire(mb_c);
pa_log_debug("1 data=%s", x);