diff options
author | Lennart Poettering <lennart@poettering.net> | 2006-09-26 23:50:56 +0000 |
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committer | Lennart Poettering <lennart@poettering.net> | 2006-09-26 23:50:56 +0000 |
commit | d210ebbb09daddb2c8c8e8e77243e088b0b19c4d (patch) | |
tree | 6ca5cc7add195f5a59778df4b0ff44f2881a0c12 /src/tests/mcalign-test.c | |
parent | 5ad143b3aba3e5bd0d528feb3143dd9cd2f1e845 (diff) |
rework memory block management to be thread-safe and mostly lock-free.
pa_memblock is now an opaque structure. Access to its fields is now done
through various accessor functions in a thread-safe manner.
pa_memblock_acquire() and pa_memblock_release() are now used to access the
attached audio data. Why? To allow safe manipulation of the memory pointer
maintained by the memory block. Internally _acquire() and _release() maintain a
reference counter. Please do not confuse this reference counter whith the one
maintained by pa_memblock_ref()/_unref()!
As a side effect this patch removes all direct usages of AO_t and replaces it
with pa_atomic_xxx based code.
This stuff needs some serious testing love. Especially if threads are actively
used.
git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@1404 fefdeb5f-60dc-0310-8127-8f9354f1896f
Diffstat (limited to 'src/tests/mcalign-test.c')
-rw-r--r-- | src/tests/mcalign-test.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/src/tests/mcalign-test.c b/src/tests/mcalign-test.c index 35691698..1584256c 100644 --- a/src/tests/mcalign-test.c +++ b/src/tests/mcalign-test.c @@ -59,24 +59,27 @@ int main(PA_GCC_UNUSED int argc, PA_GCC_UNUSED char *argv[]) { c.index = c.length = 0; } - assert(c.index < c.memblock->length); + assert(c.index < pa_memblock_get_length(c.memblock)); - l = c.memblock->length - c.index; + l = pa_memblock_get_length(c.memblock) - c.index; l = l <= 1 ? l : rand() % (l-1) +1 ; - - if ((r = read(STDIN_FILENO, (uint8_t*) c.memblock->data + c.index, l)) <= 0) { + + p = pa_memblock_acquire(c.memblock); + if ((r = read(STDIN_FILENO, (uint8_t*) p + c.index, l)) <= 0) { + pa_memblock_release(c.memblock); fprintf(stderr, "read() failed: %s\n", r < 0 ? strerror(errno) : "EOF"); break; } - + pa_memblock_release(c.memblock); + c.length = r; pa_mcalign_push(a, &c); fprintf(stderr, "Read %ld bytes\n", (long)r); c.index += r; - if (c.index >= c.memblock->length) { + if (c.index >= pa_memblock_get_length(c.memblock)) { pa_memblock_unref(c.memblock); pa_memchunk_reset(&c); } @@ -87,7 +90,9 @@ int main(PA_GCC_UNUSED int argc, PA_GCC_UNUSED char *argv[]) { if (pa_mcalign_pop(a, &t) < 0) break; - pa_loop_write(STDOUT_FILENO, (uint8_t*) t.memblock->data + t.index, t.length, NULL); + p = pa_memblock_acquire(t.memblock); + pa_loop_write(STDOUT_FILENO, (uint8_t*) p + t.index, t.length, NULL); + pa_memblock_release(t.memblock); fprintf(stderr, "Wrote %lu bytes.\n", (unsigned long) t.length); pa_memblock_unref(t.memblock); |