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b33437b1 |
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26-Jul-2018 |
Nick Maniscalco <maniscalco@google.com> |
[zircon][kernel] Use proper time types and overflow-safe arithmetic
This change is preparation for converting zx_time_t and zx_duration_t
from unsigned to signed types (ZX-2100).
1. Fix several places where the wrong time type was used (e.g.
zx_time_t instead of zx_duration_t). Because these are simple typedefs
it's easy to use the wrong one. While it generally doesn't cause a
problem, using the wrong type can be misleading and lead to bugs like
passing a relative time when an absolute time is expected.
2. Update kernel/ and some other parts of zircon to use the new
overflow-safe arithmetic functions from zircon/time.h.
Performance: Ran "/pkgfs/packages/zircon_benchmarks/0/bin/app -p" on
NUC before and after this change. Differences were withing the noise,
some slightly faster, some slightly slower.
Test: CQ
ZX-2100 #comment cleanup before conversion
Change-Id: I75d074e5850ade5385decd9bbf330497bf7610e9
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