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win32: add readv/writev emulation

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Commit e9d8fbf (qemu-file: do not use stdio for qemu_fdopen, 2013-03-27)
introduced a usage of writev, which mingw32 does not have.  Even though
qemu_fdopen itself is not used on mingw32, the future-proof solution is
to add an implementation of it.  This is simple and similar to how we
emulate sendmsg/recvmsg in util/iov.c.

Some files include osdep.h without qemu-common.h, so move the definition
of iovec to osdep.h too, and include osdep.h from qemu-common.h
unconditionally (protection against including files when NEED_CPU_H is
defined is not needed since the removal of AREG0).

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2013-04-21 12:01:06 +02:00
parent c12915e638
commit 9adea5f7f7
4 changed files with 63 additions and 21 deletions
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22
include/qemu-common.h
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@ -84,20 +84,6 @@
# error Unknown pointer size
#endif
#ifndef CONFIG_IOVEC
#define CONFIG_IOVEC
struct iovec {
void *iov_base;
size_t iov_len;
};
/*
* Use the same value as Linux for now.
*/
#define IOV_MAX 1024
#else
#include <sys/uio.h>
#endif
typedef int (*fprintf_function)(FILE *f, const char *fmt, ...)
GCC_FMT_ATTR(2, 3);
@ -122,16 +108,12 @@ static inline char *realpath(const char *path, char *resolved_path)
void configure_icount(const char *option);
extern int use_icount;
/* FIXME: Remove NEED_CPU_H. */
#ifndef NEED_CPU_H
#include "qemu/osdep.h"
#include "qemu/bswap.h"
#else
/* FIXME: Remove NEED_CPU_H. */
#ifdef NEED_CPU_H
#include "cpu.h"
#endif /* !defined(NEED_CPU_H) */
/* main function, renamed */