gallium/os: add os_wait_until_zero (v2)

Graphics / Mesa 3D Graphics Library / Mesa - Marek Olšák [amd.com] - 5 July 2015 08:08 UTC

This will be used by radeon and amdgpu winsyses. Copied from the amdgpu winsys.

v2: use volatile and p_atomic_read

3836857 gallium/os: add os_wait_until_zero (v2)
src/gallium/auxiliary/os/os_time.c | 38 +++++++++++++++++++++++++++++++++++-
src/gallium/auxiliary/os/os_time.h | 11 +++++++++++
2 files changed, 48 insertions(+), 1 deletion(-)

Upstream: cgit.freedesktop.org

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