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feat: libc - add SYS_GETCHAR_NB and a non-blocking stdin readiness probe

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Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NQRTGoYgnZQsh7uCh6Jsxm
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daniel
2026-08-08 14:42:38 +02:00
co-authored by Claude Opus 5
parent fe10216f8b
commit e8407afcdb
11 changed files with 125 additions and 17 deletions
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programs/include/montauk/syscall.h
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@@ -197,6 +197,8 @@ namespace montauk {
inline bool is_key_available() { return (bool)syscall0(montauk::abi::SYS_ISKEYAVAILABLE); }
inline void getkey(montauk::abi::KeyEvent* out) { syscall1(montauk::abi::SYS_GETKEY, (uint64_t)out); }
inline char getchar() { return (char)syscall0(montauk::abi::SYS_GETCHAR); }
// Returns 0 rather than blocking when no character is pending.
inline char getchar_nb() { return (char)syscall0(montauk::abi::SYS_GETCHAR_NB); }
inline uint64_t input_wait(uint64_t observedSerial, uint64_t timeoutMs) {
return (uint64_t)syscall2(montauk::abi::SYS_INPUT_WAIT, observedSerial, timeoutMs);
}