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kernel: support timed umtx waits through shared address deadlines

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Co-authored-by: BlackCAT <52720489+psnwd@users.noreply.github.com>
This commit is contained in:
nmzik
2026-09-13 15:25:52 +04:00
parent f426d60ff1
commit f3c82a317a
4 changed files with 64 additions and 12 deletions
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src/libs/libKernel.cpp
+7 -1
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@@ -2128,7 +2128,13 @@ int KYTY_SYSV_ABI UmtxOp(volatile void* address, int operation, uint64_t value,
*GetErrorAddr() = POSIX_EINVAL;
return -1;
}
EXIT("Valid _umtx_op timed waits are not implemented\n");
const auto max_ns = std::chrono::nanoseconds::max().count();
const auto timeout_ns = duration.tv_sec > (max_ns - duration.tv_nsec) / 1000000000
? max_ns
: duration.tv_sec * 1000000000 + duration.tv_nsec;
return POSIX_CALL(LibKernel::SyncOnAddress::Wait64(
static_cast<volatile uint64_t*>(address), value, std::chrono::nanoseconds(timeout_ns),
LibKernel::KernelDispatchPendingSignalForCurrentThread));
}
return POSIX_CALL(LibKernel::SyncOnAddress::Wait64(
static_cast<volatile uint64_t*>(address), value, nullptr,