Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
lib-test: Added test_ostream for testing nonblocking ostreams.
- Loading branch information
Showing
3 changed files
with
203 additions
and
1 deletion.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,193 @@ | ||
/* Copyright (c) 2016 Dovecot authors, see the included COPYING file */ | ||
|
||
#include "lib.h" | ||
#include "buffer.h" | ||
#include "ostream-private.h" | ||
#include "test-common.h" | ||
|
||
struct test_ostream { | ||
struct ostream_private ostream; | ||
buffer_t *internal_buf; | ||
buffer_t *output_buf; | ||
size_t max_output_size; | ||
struct timeout *to; | ||
bool flush_pending; | ||
}; | ||
|
||
static void o_stream_test_destroy(struct iostream_private *stream) | ||
{ | ||
struct test_ostream *tstream = (struct test_ostream *)stream; | ||
|
||
if (tstream->to != NULL) | ||
timeout_remove(&tstream->to); | ||
if (tstream->internal_buf != NULL) | ||
i_free(tstream->internal_buf); | ||
} | ||
|
||
static int o_stream_test_flush(struct ostream_private *stream) | ||
{ | ||
struct test_ostream *tstream = (struct test_ostream *)stream; | ||
|
||
if (tstream->internal_buf == NULL || tstream->internal_buf->used == 0) | ||
return 1; | ||
if (tstream->output_buf->used >= tstream->max_output_size) | ||
return 0; | ||
|
||
size_t left = tstream->max_output_size - tstream->output_buf->used; | ||
size_t n = I_MIN(left, tstream->internal_buf->used); | ||
buffer_append(tstream->output_buf, tstream->internal_buf->data, n); | ||
buffer_delete(tstream->internal_buf, 0, n); | ||
return tstream->internal_buf->used == 0 ? 1 : 0; | ||
} | ||
|
||
static ssize_t | ||
o_stream_test_sendv(struct ostream_private *stream, | ||
const struct const_iovec *iov, unsigned int iov_count) | ||
{ | ||
struct test_ostream *tstream = (struct test_ostream *)stream; | ||
struct const_iovec cur_iov = { NULL, 0 }; | ||
size_t left, n; | ||
ssize_t ret = 0; | ||
unsigned int i; | ||
|
||
/* first we need to try to flush the internal buffer */ | ||
if ((ret = o_stream_test_flush(stream)) <= 0) | ||
return ret; | ||
|
||
/* append to output_buf until max_output_size is reached */ | ||
ret = 0; | ||
for (i = 0; i < iov_count; i++) { | ||
left = tstream->max_output_size < tstream->output_buf->used ? 0 : | ||
tstream->max_output_size - tstream->output_buf->used; | ||
n = I_MIN(left, iov[i].iov_len); | ||
buffer_append(tstream->output_buf, iov[i].iov_base, n); | ||
stream->ostream.offset += n; | ||
ret += n; | ||
if (n != iov[i].iov_len) { | ||
cur_iov.iov_base = CONST_PTR_OFFSET(iov[i].iov_base, n); | ||
cur_iov.iov_len = iov[i].iov_len - n; | ||
break; | ||
} | ||
} | ||
/* if we've internal_buf, append to it until max_buffer_size is | ||
reached */ | ||
if (i == iov_count || tstream->internal_buf == NULL) | ||
return ret; | ||
do { | ||
left = tstream->ostream.max_buffer_size - | ||
tstream->internal_buf->used; | ||
n = I_MIN(left, cur_iov.iov_len); | ||
buffer_append(tstream->internal_buf, cur_iov.iov_base, n); | ||
stream->ostream.offset += n; | ||
ret += n; | ||
if (n != cur_iov.iov_len) | ||
break; | ||
cur_iov = iov[++i]; | ||
} while (i < iov_count); | ||
|
||
tstream->flush_pending = TRUE; | ||
return ret; | ||
} | ||
|
||
static void test_ostream_send_more(struct test_ostream *tstream) | ||
{ | ||
struct ostream *ostream = &tstream->ostream.ostream; | ||
int ret; | ||
|
||
o_stream_ref(ostream); | ||
tstream->flush_pending = FALSE; | ||
if (tstream->ostream.callback != NULL) | ||
ret = tstream->ostream.callback(tstream->ostream.context); | ||
else | ||
ret = o_stream_test_flush(&tstream->ostream); | ||
if (ret == 0 || (tstream->internal_buf != NULL && | ||
tstream->internal_buf->used > 0)) | ||
tstream->flush_pending = TRUE; | ||
if (!tstream->flush_pending || | ||
tstream->output_buf->used >= tstream->max_output_size) | ||
timeout_remove(&tstream->to); | ||
o_stream_unref(&ostream); | ||
} | ||
|
||
static void test_ostream_set_send_more_timeout(struct test_ostream *tstream) | ||
{ | ||
if (tstream->to == NULL && tstream->flush_pending && | ||
tstream->output_buf->used < tstream->max_output_size) | ||
tstream->to = timeout_add_short(0, test_ostream_send_more, tstream); | ||
} | ||
|
||
static void | ||
o_stream_test_flush_pending(struct ostream_private *stream, bool set) | ||
{ | ||
struct test_ostream *tstream = (struct test_ostream *)stream; | ||
|
||
if (tstream->internal_buf != NULL && tstream->internal_buf->used > 0) { | ||
/* we have internal data, won't reset flush_pending */ | ||
i_assert(tstream->flush_pending); | ||
} else { | ||
tstream->flush_pending = set; | ||
} | ||
if (set) | ||
test_ostream_set_send_more_timeout(tstream); | ||
} | ||
|
||
static size_t | ||
o_stream_test_get_used_size(const struct ostream_private *stream) | ||
{ | ||
struct test_ostream *tstream = (struct test_ostream *)stream; | ||
|
||
return tstream->internal_buf == NULL ? 0 : | ||
tstream->internal_buf->used; | ||
} | ||
|
||
struct ostream *test_ostream_create(buffer_t *output) | ||
{ | ||
struct test_ostream *tstream; | ||
struct ostream *ostream; | ||
|
||
tstream = i_new(struct test_ostream, 1); | ||
tstream->ostream.max_buffer_size = (size_t)-1; | ||
tstream->ostream.iostream.destroy = o_stream_test_destroy; | ||
tstream->ostream.sendv = o_stream_test_sendv; | ||
tstream->ostream.flush = o_stream_test_flush; | ||
tstream->ostream.flush_pending = o_stream_test_flush_pending; | ||
tstream->ostream.get_used_size = o_stream_test_get_used_size; | ||
tstream->ostream.ostream.blocking = TRUE; | ||
|
||
tstream->output_buf = output; | ||
tstream->max_output_size = (size_t)-1; | ||
ostream = o_stream_create(&tstream->ostream, NULL, -1); | ||
o_stream_set_name(ostream, "(test-ostream)"); | ||
return ostream; | ||
} | ||
|
||
struct ostream *test_ostream_create_nonblocking(buffer_t *output, | ||
size_t max_internal_buffer_size) | ||
{ | ||
struct test_ostream *tstream; | ||
|
||
tstream = (struct test_ostream *)test_ostream_create(output)->real_stream; | ||
tstream->internal_buf = buffer_create_dynamic(default_pool, 128); | ||
tstream->ostream.ostream.blocking = FALSE; | ||
tstream->ostream.max_buffer_size = max_internal_buffer_size; | ||
return &tstream->ostream.ostream; | ||
} | ||
|
||
static struct test_ostream *test_ostream_find(struct ostream *output) | ||
{ | ||
struct ostream *out; | ||
|
||
for (out = output; out != NULL; out = out->real_stream->parent) { | ||
if (out->real_stream->sendv == o_stream_test_sendv) | ||
return (struct test_ostream *)out->real_stream; | ||
} | ||
i_panic("%s isn't test-ostream", o_stream_get_name(output)); | ||
} | ||
|
||
void test_ostream_set_max_output_size(struct ostream *output, size_t max_size) | ||
{ | ||
struct test_ostream *tstream = test_ostream_find(output); | ||
|
||
tstream->max_output_size = max_size; | ||
test_ostream_set_send_more_timeout(tstream); | ||
} |