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io: add QIOChannelBuffer class

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Add a QIOChannel subclass that is capable of performing I/O
to/from a memory buffer. This implementation does not attempt
to support concurrent readers & writers. It is designed for
serialized access where by a single thread at a time may write
data, seek and then read data back out.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
This commit is contained in:
Daniel P. Berrange 2015-09-15 17:27:33 +01:00
parent 195e14d026
commit d98e4eb7de
6 changed files with 363 additions and 0 deletions
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1
tests/.gitignore vendored
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@ -24,6 +24,7 @@ test-cutils
test-hbitmap
test-int128
test-iov
test-io-channel-buffer
test-io-channel-command
test-io-channel-command.fifo
test-io-channel-file

3
tests/Makefile
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@ -89,6 +89,7 @@ check-unit-y += tests/test-io-channel-socket$(EXESUF)
check-unit-y += tests/test-io-channel-file$(EXESUF)
check-unit-$(CONFIG_GNUTLS) += tests/test-io-channel-tls$(EXESUF)
check-unit-y += tests/test-io-channel-command$(EXESUF)
check-unit-y += tests/test-io-channel-buffer$(EXESUF)
check-block-$(CONFIG_POSIX) += tests/qemu-iotests-quick.sh
@ -485,6 +486,8 @@ tests/test-io-channel-tls$(EXESUF): tests/test-io-channel-tls.o \
tests/io-channel-helpers.o $(test-io-obj-y)
tests/test-io-channel-command$(EXESUF): tests/test-io-channel-command.o \
tests/io-channel-helpers.o $(test-io-obj-y)
tests/test-io-channel-buffer$(EXESUF): tests/test-io-channel-buffer.o \
tests/io-channel-helpers.o $(test-io-obj-y)
libqos-obj-y = tests/libqos/pci.o tests/libqos/fw_cfg.o tests/libqos/malloc.o
libqos-obj-y += tests/libqos/i2c.o tests/libqos/libqos.o

50
tests/test-io-channel-buffer.c Normal file
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@ -0,0 +1,50 @@
/*
* QEMU I/O channel buffer test
*
* Copyright (c) 2015 Red Hat, Inc.
*
* This library 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 of the License, or (at your option) any later version.
*
* This library 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 this library; if not, see <http://www.gnu.org/licenses/>.
*
*/
#include "io/channel-buffer.h"
#include "io-channel-helpers.h"
static void test_io_channel_buf(void)
{
QIOChannelBuffer *buf;
QIOChannelTest *test;
buf = qio_channel_buffer_new(0);
test = qio_channel_test_new();
qio_channel_test_run_writer(test, QIO_CHANNEL(buf));
buf->offset = 0;
qio_channel_test_run_reader(test, QIO_CHANNEL(buf));
qio_channel_test_validate(test);
object_unref(OBJECT(buf));
}
int main(int argc, char **argv)
{
module_call_init(MODULE_INIT_QOM);
g_test_init(&argc, &argv, NULL);
g_test_add_func("/io/channel/buf", test_io_channel_buf);
return g_test_run();
}