4 * Copyright IBM, Corp. 2010
7 * Harsh Prateek Bora <harsh@linux.vnet.ibm.com>
8 * Venkateswararao Jujjuri(JV) <jvrao@linux.vnet.ibm.com>
10 * This work is licensed under the terms of the GNU GPL, version 2. See
11 * the COPYING file in the top-level directory.
15 #ifndef _QEMU_VIRTIO_9P_COTH_H
16 #define _QEMU_VIRTIO_9P_COTH_H
18 #include "qemu-thread.h"
19 #include "qemu-coroutine.h"
20 #include "virtio-9p.h"
23 typedef struct V9fsThPool
{
27 GAsyncQueue
*completed
;
31 * we want to use bottom half because we want to make sure the below
34 * 1. Yield the coroutine in the QEMU thread.
35 * 2. Submit the coroutine to a worker thread.
36 * 3. Enter the coroutine in the worker thread.
37 * we cannot swap step 1 and 2, because that would imply worker thread
38 * can enter coroutine while step1 is still running
40 #define v9fs_co_run_in_worker(code_block) \
43 co_bh = qemu_bh_new(co_run_in_worker_bh, \
44 qemu_coroutine_self()); \
45 qemu_bh_schedule(co_bh); \
47 * yeild in qemu thread and re-enter back \
48 * in glib worker thread \
50 qemu_coroutine_yield(); \
51 qemu_bh_delete(co_bh); \
53 /* re-enter back to qemu thread */ \
54 qemu_coroutine_yield(); \
57 extern void co_run_in_worker_bh(void *);
58 extern int v9fs_init_worker_threads(void);