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| author | Fam Zheng | 2017-05-02 18:35:54 +0200 |
|---|---|---|
| committer | Kevin Wolf | 2017-05-11 11:15:32 +0200 |
| commit | 13461fdba6588540c99bf1e32275e421da22c396 (patch) | |
| tree | 11f9d6afae8e70d9419c25f50f2fe562d335f364 /include | |
| parent | block: Reuse bs as backing hd for drive-backup sync=none (diff) | |
| download | qemu-13461fdba6588540c99bf1e32275e421da22c396.tar.gz qemu-13461fdba6588540c99bf1e32275e421da22c396.tar.xz qemu-13461fdba6588540c99bf1e32275e421da22c396.zip | |
osdep: Add qemu_lock_fd and qemu_unlock_fd
They are wrappers of POSIX fcntl "file private locking", with a
convenient "try lock" wrapper implemented with F_OFD_GETLK.
Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/qemu/osdep.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h index 122ff06ff6..1c9f5e260c 100644 --- a/include/qemu/osdep.h +++ b/include/qemu/osdep.h @@ -341,6 +341,9 @@ int qemu_close(int fd); #ifndef _WIN32 int qemu_dup(int fd); #endif +int qemu_lock_fd(int fd, int64_t start, int64_t len, bool exclusive); +int qemu_unlock_fd(int fd, int64_t start, int64_t len); +int qemu_lock_fd_test(int fd, int64_t start, int64_t len, bool exclusive); #if defined(__HAIKU__) && defined(__i386__) #define FMT_pid "%ld" |