mirror of
https://github.com/xemu-project/xemu.git
synced 2024-11-24 12:09:58 +00:00
39c0564e00
This patch is originally made by Arun Bharadwaj for glib support. Later Harsh Prateek Bora added coroutines support. This version implemented with suggestions from Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>. Signed-off-by: Arun R Bharadwaj <arun@linux.vnet.ibm.com> Signed-off-by: Harsh Prateek Bora <harsh@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri "<jvrao@linux.vnet.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
59 lines
2.1 KiB
C
59 lines
2.1 KiB
C
/*
|
|
* Virtio 9p backend
|
|
*
|
|
* Copyright IBM, Corp. 2010
|
|
*
|
|
* Authors:
|
|
* Harsh Prateek Bora <harsh@linux.vnet.ibm.com>
|
|
* Venkateswararao Jujjuri(JV) <jvrao@linux.vnet.ibm.com>
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2. See
|
|
* the COPYING file in the top-level directory.
|
|
*
|
|
*/
|
|
|
|
#ifndef _QEMU_VIRTIO_9P_COTH_H
|
|
#define _QEMU_VIRTIO_9P_COTH_H
|
|
|
|
#include "qemu-thread.h"
|
|
#include "qemu-coroutine.h"
|
|
#include <glib.h>
|
|
|
|
typedef struct V9fsThPool {
|
|
int rfd;
|
|
int wfd;
|
|
GThreadPool *pool;
|
|
GAsyncQueue *completed;
|
|
} V9fsThPool;
|
|
|
|
/*
|
|
* we want to use bottom half because we want to make sure the below
|
|
* sequence of events.
|
|
*
|
|
* 1. Yield the coroutine in the QEMU thread.
|
|
* 2. Submit the coroutine to a worker thread.
|
|
* 3. Enter the coroutine in the worker thread.
|
|
* we cannot swap step 1 and 2, because that would imply worker thread
|
|
* can enter coroutine while step1 is still running
|
|
*/
|
|
#define v9fs_co_run_in_worker(code_block) \
|
|
do { \
|
|
QEMUBH *co_bh; \
|
|
co_bh = qemu_bh_new(co_run_in_worker_bh, \
|
|
qemu_coroutine_self()); \
|
|
qemu_bh_schedule(co_bh); \
|
|
/* \
|
|
* yeild in qemu thread and re-enter back \
|
|
* in glib worker thread \
|
|
*/ \
|
|
qemu_coroutine_yield(); \
|
|
qemu_bh_delete(co_bh); \
|
|
code_block; \
|
|
/* re-enter back to qemu thread */ \
|
|
qemu_coroutine_yield(); \
|
|
} while (0)
|
|
|
|
extern void co_run_in_worker_bh(void *);
|
|
extern int v9fs_init_worker_threads(void);
|
|
#endif
|