251 lines
6.4 KiB
C
251 lines
6.4 KiB
C
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#include "qemu/osdep.h"
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#include "qemu-common.h"
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#include "block/aio.h"
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#include "block/thread-pool.h"
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#include "block/block.h"
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#include "qapi/error.h"
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#include "qemu/timer.h"
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#include "qemu/error-report.h"
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#include "qemu/main-loop.h"
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static AioContext *ctx;
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static ThreadPool *pool;
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static int active;
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typedef struct {
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BlockAIOCB *aiocb;
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int n;
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int ret;
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} WorkerTestData;
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static int worker_cb(void *opaque)
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{
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WorkerTestData *data = opaque;
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return atomic_fetch_inc(&data->n);
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}
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static int long_cb(void *opaque)
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{
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WorkerTestData *data = opaque;
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if (atomic_cmpxchg(&data->n, 0, 1) == 0) {
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g_usleep(2000000);
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atomic_or(&data->n, 2);
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}
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return 0;
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}
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static void done_cb(void *opaque, int ret)
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{
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WorkerTestData *data = opaque;
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g_assert(data->ret == -EINPROGRESS || data->ret == -ECANCELED);
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data->ret = ret;
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data->aiocb = NULL;
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/* Callbacks are serialized, so no need to use atomic ops. */
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active--;
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}
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static void test_submit(void)
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{
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WorkerTestData data = { .n = 0 };
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thread_pool_submit(pool, worker_cb, &data);
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while (data.n == 0) {
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aio_poll(ctx, true);
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}
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g_assert_cmpint(data.n, ==, 1);
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}
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static void test_submit_aio(void)
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{
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WorkerTestData data = { .n = 0, .ret = -EINPROGRESS };
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data.aiocb = thread_pool_submit_aio(pool, worker_cb, &data,
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done_cb, &data);
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/* The callbacks are not called until after the first wait. */
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active = 1;
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g_assert_cmpint(data.ret, ==, -EINPROGRESS);
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while (data.ret == -EINPROGRESS) {
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aio_poll(ctx, true);
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}
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g_assert_cmpint(active, ==, 0);
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g_assert_cmpint(data.n, ==, 1);
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g_assert_cmpint(data.ret, ==, 0);
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}
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static void co_test_cb(void *opaque)
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{
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WorkerTestData *data = opaque;
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active = 1;
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data->n = 0;
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data->ret = -EINPROGRESS;
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thread_pool_submit_co(pool, worker_cb, data);
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/* The test continues in test_submit_co, after qemu_coroutine_enter... */
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g_assert_cmpint(data->n, ==, 1);
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data->ret = 0;
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active--;
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/* The test continues in test_submit_co, after aio_poll... */
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}
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static void test_submit_co(void)
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{
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WorkerTestData data;
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Coroutine *co = qemu_coroutine_create(co_test_cb, &data);
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qemu_coroutine_enter(co);
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/* Back here once the worker has started. */
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g_assert_cmpint(active, ==, 1);
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g_assert_cmpint(data.ret, ==, -EINPROGRESS);
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/* aio_poll will execute the rest of the coroutine. */
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while (data.ret == -EINPROGRESS) {
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aio_poll(ctx, true);
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}
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/* Back here after the coroutine has finished. */
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g_assert_cmpint(active, ==, 0);
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g_assert_cmpint(data.ret, ==, 0);
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}
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static void test_submit_many(void)
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{
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WorkerTestData data[100];
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int i;
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/* Start more work items than there will be threads. */
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for (i = 0; i < 100; i++) {
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data[i].n = 0;
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data[i].ret = -EINPROGRESS;
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thread_pool_submit_aio(pool, worker_cb, &data[i], done_cb, &data[i]);
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}
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active = 100;
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while (active > 0) {
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aio_poll(ctx, true);
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}
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for (i = 0; i < 100; i++) {
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g_assert_cmpint(data[i].n, ==, 1);
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g_assert_cmpint(data[i].ret, ==, 0);
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}
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}
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static void do_test_cancel(bool sync)
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{
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WorkerTestData data[100];
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int num_canceled;
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int i;
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/* Start more work items than there will be threads, to ensure
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* the pool is full.
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*/
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test_submit_many();
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/* Start long running jobs, to ensure we can cancel some. */
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for (i = 0; i < 100; i++) {
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data[i].n = 0;
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data[i].ret = -EINPROGRESS;
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data[i].aiocb = thread_pool_submit_aio(pool, long_cb, &data[i],
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done_cb, &data[i]);
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}
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/* Starting the threads may be left to a bottom half. Let it
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* run, but do not waste too much time...
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*/
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active = 100;
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aio_notify(ctx);
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aio_poll(ctx, false);
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/* Wait some time for the threads to start, with some sanity
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* testing on the behavior of the scheduler...
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*/
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g_assert_cmpint(active, ==, 100);
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g_usleep(1000000);
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g_assert_cmpint(active, >, 50);
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/* Cancel the jobs that haven't been started yet. */
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num_canceled = 0;
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for (i = 0; i < 100; i++) {
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if (atomic_cmpxchg(&data[i].n, 0, 4) == 0) {
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data[i].ret = -ECANCELED;
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if (sync) {
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bdrv_aio_cancel(data[i].aiocb);
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} else {
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bdrv_aio_cancel_async(data[i].aiocb);
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}
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num_canceled++;
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}
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}
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g_assert_cmpint(active, >, 0);
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g_assert_cmpint(num_canceled, <, 100);
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for (i = 0; i < 100; i++) {
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if (data[i].aiocb && atomic_read(&data[i].n) < 4) {
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if (sync) {
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/* Canceling the others will be a blocking operation. */
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bdrv_aio_cancel(data[i].aiocb);
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} else {
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bdrv_aio_cancel_async(data[i].aiocb);
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}
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}
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}
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/* Finish execution and execute any remaining callbacks. */
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while (active > 0) {
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aio_poll(ctx, true);
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}
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g_assert_cmpint(active, ==, 0);
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for (i = 0; i < 100; i++) {
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g_assert(data[i].aiocb == NULL);
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switch (data[i].n) {
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case 0:
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fprintf(stderr, "Callback not canceled but never started?\n");
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abort();
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case 3:
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/* Couldn't be canceled asynchronously, must have completed. */
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g_assert_cmpint(data[i].ret, ==, 0);
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break;
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case 4:
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/* Could be canceled asynchronously, never started. */
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g_assert_cmpint(data[i].ret, ==, -ECANCELED);
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break;
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default:
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fprintf(stderr, "Callback aborted while running?\n");
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abort();
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}
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}
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}
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static void test_cancel(void)
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{
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do_test_cancel(true);
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}
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static void test_cancel_async(void)
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{
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do_test_cancel(false);
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}
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int main(int argc, char **argv)
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{
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qemu_init_main_loop(&error_abort);
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ctx = qemu_get_current_aio_context();
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pool = aio_get_thread_pool(ctx);
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g_test_init(&argc, &argv, NULL);
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g_test_add_func("/thread-pool/submit", test_submit);
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g_test_add_func("/thread-pool/submit-aio", test_submit_aio);
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g_test_add_func("/thread-pool/submit-co", test_submit_co);
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g_test_add_func("/thread-pool/submit-many", test_submit_many);
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g_test_add_func("/thread-pool/cancel", test_cancel);
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g_test_add_func("/thread-pool/cancel-async", test_cancel_async);
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return g_test_run();
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}
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