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Use AIO only if host supports it (based on OpenBSD patches by Todd T. Fries)

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5010 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
blueswir1 2008-08-15 18:20:52 +00:00
parent 53c3748794
commit 414f0dab09
2 changed files with 59 additions and 0 deletions
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38
block-raw-posix.c
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@ -28,7 +28,9 @@
#endif
#include "block_int.h"
#include <assert.h>
#ifdef CONFIG_AIO
#include <aio.h>
#endif
#ifdef CONFIG_COCOA
#include <paths.h>
@ -418,6 +420,7 @@ static int raw_pwrite(BlockDriverState *bs, int64_t offset,
#endif
#ifdef CONFIG_AIO
/***********************************************************/
/* Unix AIO using POSIX AIO */
@ -688,6 +691,37 @@ static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
}
}
# else /* CONFIG_AIO */
void qemu_aio_init(void)
{
}
void qemu_aio_poll(void)
{
}
void qemu_aio_flush(void)
{
}
void qemu_aio_wait_start(void)
{
}
void qemu_aio_wait(void)
{
#if !defined(QEMU_IMG) && !defined(QEMU_NBD)
qemu_bh_poll();
#endif
}
void qemu_aio_wait_end(void)
{
}
#endif /* CONFIG_AIO */
static void raw_close(BlockDriverState *bs)
{
BDRVRawState *s = bs->opaque;
@ -792,10 +826,12 @@ BlockDriver bdrv_raw = {
raw_create,
raw_flush,
#ifdef CONFIG_AIO
.bdrv_aio_read = raw_aio_read,
.bdrv_aio_write = raw_aio_write,
.bdrv_aio_cancel = raw_aio_cancel,
.aiocb_size = sizeof(RawAIOCB),
#endif
.protocol_name = "file",
.bdrv_pread = raw_pread,
.bdrv_pwrite = raw_pwrite,
@ -1144,10 +1180,12 @@ BlockDriver bdrv_host_device = {
NULL,
raw_flush,
#ifdef CONFIG_AIO
.bdrv_aio_read = raw_aio_read,
.bdrv_aio_write = raw_aio_write,
.bdrv_aio_cancel = raw_aio_cancel,
.aiocb_size = sizeof(RawAIOCB),
#endif
.bdrv_pread = raw_pread,
.bdrv_pwrite = raw_pwrite,
.bdrv_getlength = raw_getlength,