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/*
* RFifoLock tests
*
* Copyright Red Hat, Inc. 2013
*
* Authors:
* Stefan Hajnoczi <stefanha@redhat.com>
*
* This work is licensed under the terms of the GNU LGPL, version 2 or later.
* See the COPYING.LIB file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "qemu/rfifolock.h"
static void test_nesting(void)
{
RFifoLock lock;
/* Trivial test, ensure the lock is recursive */
rfifolock_init(&lock, NULL, NULL);
rfifolock_lock(&lock);
rfifolock_lock(&lock);
rfifolock_lock(&lock);
rfifolock_unlock(&lock);
rfifolock_unlock(&lock);
rfifolock_unlock(&lock);
rfifolock_destroy(&lock);
}
typedef struct {
RFifoLock lock;
int fd[2];
} CallbackTestData;
static void rfifolock_cb(void *opaque)
{
CallbackTestData *data = opaque;
int ret;
char c = 0;
ret = write(data->fd[1], &c, sizeof(c));
g_assert(ret == 1);
}
static void *callback_thread(void *opaque)
{
CallbackTestData *data = opaque;
/* The other thread holds the lock so the contention callback will be
* invoked...
*/
rfifolock_lock(&data->lock);
rfifolock_unlock(&data->lock);
return NULL;
}
static void test_callback(void)
{
CallbackTestData data;
QemuThread thread;
int ret;
char c;
rfifolock_init(&data.lock, rfifolock_cb, &data);
ret = qemu_pipe(data.fd);
g_assert(ret == 0);
/* Hold lock but allow the callback to kick us by writing to the pipe */
rfifolock_lock(&data.lock);
qemu_thread_create(&thread, "callback_thread",
callback_thread, &data, QEMU_THREAD_JOINABLE);
ret = read(data.fd[0], &c, sizeof(c));
g_assert(ret == 1);
rfifolock_unlock(&data.lock);
/* If we got here then the callback was invoked, as expected */
qemu_thread_join(&thread);
close(data.fd[0]);
close(data.fd[1]);
rfifolock_destroy(&data.lock);
}
int main(int argc, char **argv)
{
g_test_init(&argc, &argv, NULL);
g_test_add_func("/nesting", test_nesting);
g_test_add_func("/callback", test_callback);
return g_test_run();
}
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