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test(windows-shim): stub usleep tunables for the headers-only test

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The shim header unistd.h references three integer tunables that
drive the spin-residual hybrid usleep:
  - g_usleep_pure_spin_us
  - g_usleep_spin_tail_us
  - g_usleep_adaptive_min_tail_us
They are normally defined in
platforms/posix/src/px4/windows/runtime/init.cpp. The
test_windows_shim_headers binary intentionally does not link
init.cpp because doing so would drag in the entire process
runtime; without those symbols the test failed at link time with
unresolved externals.

Provide local definitions matching the documented defaults
(5000 / 1000 / 700 microseconds) so the headers-only translation
unit links cleanly. Keep them in sync with init.cpp.

Signed-off-by: Nuno Marques <n.marques21@hotmail.com>
This commit is contained in:
Nuno Marques
2026-05-07 18:06:43 -07:00
parent 3bb7a88607
commit 7484da77dd
1 changed files with 11 additions and 0 deletions
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platforms/posix/src/px4/windows/tests/test_windows_shim_headers.cpp
+11
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@@ -52,6 +52,17 @@
#include <chrono>
#include <thread>
/* The shim header for usleep references three tunables that are normally
* defined in platforms/posix/src/px4/windows/runtime/init.cpp. This unit
* test binary intentionally does not link init.cpp (it would drag in the
* full runtime), so we provide local definitions matching the documented
* defaults. Keep them in sync with init.cpp. */
extern "C" {
long g_usleep_pure_spin_us = 5000;
long g_usleep_spin_tail_us = 1000;
long g_usleep_adaptive_min_tail_us = 700;
}
/* Pull headers via the shim include path so the inline functions under
* test are the same definitions PX4 sources see. */
#include <libgen.h>