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osdep: Add qemu_lock_fd and qemu_unlock_fd
authorFam Zheng <[email protected]>
Tue, 2 May 2017 16:35:54 +0000 (00:35 +0800)
committerKevin Wolf <[email protected]>
Thu, 11 May 2017 09:15:32 +0000 (11:15 +0200)
commit13461fdba6588540c99bf1e32275e421da22c396
tree11f9d6afae8e70d9419c25f50f2fe562d335f364tree | snapshot
parentfc0932fdcfc3e5cafa3641e361b681c07f639812commit | diff
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 <[email protected]>
Reviewed-by: Max Reitz <[email protected]>
Signed-off-by: Kevin Wolf <[email protected]>
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