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* libcutils: ashmem: Avoid doing fd checks for ashmem callsJoel Fernandes2018-07-171-25/+11
| | | | | | | | | | | | | | | Callers already verify that they are calling ashmem API on a valid fd by calling ashmem_valid first. Lets make the fstat syscall only if the ioctl returns -ENOTTY. This means in the regular case, only 1 syscall is needed (ioctl) vs the current 2 (fstat+ioctl). Some data to show improvements in reduction of vfs_getattr calls in the kernel by 10x when doing a camera. Test: Boot and camera CTS Bug: 111418894 Change-Id: I992620bbe44355e54ba19eeac81da586c5e5a6e0 Signed-off-by: Joel Fernandes <joelaf@google.com>
* Move libcutils source to C++.Elliott Hughes2017-11-101-0/+227
Just the minimial changes to get this to actually build, because otherwise we always bog down trying to rewrite everything (when the real answer is usually "stop using libcutils, it's awful"). This doesn't move a handful of files: two are basically just BSD libc source, a couple have outstanding code reviews, and one can be deleted (but I'll do that in a separate change). I'm also skipping the presubmit hooks because otherwise clang-format wants to reformat everything. I'll follow up with that... Bug: N/A Test: builds Change-Id: I06403f465b67c8e493bad466dd76b1151eed5993