io: add QIOChannelBuffer class

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>

3 files changed, 54 insertions, 0 deletions

diff --git a/tests/.gitignore b/tests/.gitignore
index cc9aeec717..77aaba6c2f 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -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
diff --git a/tests/Makefile b/tests/Makefile
index 40c3855c4d..6ff4627d0c 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -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
diff --git a/tests/test-io-channel-buffer.c b/tests/test-io-channel-buffer.c
new file mode 100644
index 0000000000..6637501b41
--- /dev/null
+++ b/tests/test-io-channel-buffer.c
@@ -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();
+}