module std::os::posix @if(env::POSIX);
import libc;

extern fn CInt clock_gettime(int type, TimeSpec *time) @cname(env::NETBSD ??? "__clock_gettime50" : "clock_gettime");

module std::os::posix @if(env::OPENBSD);
const CLOCK_REALTIME = 0;
const CLOCK_PROCESS_CPUTIME_ID = 2;
const CLOCK_MONOTONIC = 3;
const CLOCK_THREAD_CPUTIME_ID = 4;
const CLOCK_UPTIME = 5;
const CLOCK_BOOTTIME = 6;

module std::os::posix @if(env::FREEBSD);
const CLOCK_REALTIME = 0;
const CLOCK_VIRTUAL = 1;
const CLOCK_PROF = 2;
const CLOCK_MONOTONIC = 4;
const CLOCK_UPTIME = 5;
const CLOCK_UPTIME_PRECISE = 7;
const CLOCK_UPTIME_FAST = 8;
const CLOCK_REALTIME_PRECISE = 9;
const CLOCK_REALTIME_FAST = 10;
const CLOCK_MONOTONIC_PRECISE = 11;
const CLOCK_MONOTONIC_FAST = 12;
const CLOCK_SECOND = 13;
const CLOCK_THREAD_CPUTIME_ID = 14;
const CLOCK_PROCESS_CPUTIME_ID = 15;
const CLOCK_BOOTTIME = CLOCK_UPTIME;
const CLOCK_REALTIME_COARSE = CLOCK_REALTIME_FAST;
const CLOCK_MONOTONIC_COARSE = CLOCK_MONOTONIC_FAST;

module std::os::posix @if(env::NETBSD);
const CLOCK_REALTIME = 0;
const CLOCK_VIRTUAL = 1;
const CLOCK_PROF = 2;
const CLOCK_MONOTONIC = 3;
const CLOCK_THREAD_CPUTIME_ID = 0x20000000;
const CLOCK_PROCESS_CPUTIME_ID = 0x40000000;

module std::os::posix @if(env::WASI);
// Not implemented
const CLOCK_REALTIME = 0;
const CLOCK_MONOTONIC = 0;

module std::os::posix @if(env::DARWIN);
const CLOCK_REALTIME = 0;
const CLOCK_MONOTONIC = 6;
const CLOCK_MONOTONIC_RAW = 4;
const CLOCK_MONOTONIC_RAW_APPROX = 5;
const CLOCK_UPTIME_RAW = 8;
const CLOCK_UPTIME_RAW_APPROX = 9;
const CLOCK_PROCESS_CPUTIME_ID = 12;
const CLOCK_THREAD_CPUTIME_ID = 16;

module std::os::posix @if(env::LINUX || env::ANDROID);
const CLOCK_REALTIME = 0;
const CLOCK_MONOTONIC = 1;
const CLOCK_PROCESS_CPUTIME_ID = 2;
const CLOCK_THREAD_CPUTIME_ID = 3;
const CLOCK_MONOTONIC_RAW = 4;
const CLOCK_REALTIME_COARSE = 5;
const CLOCK_MONOTONIC_COARSE = 6;
const CLOCK_BOOTTIME = 7;
const CLOCK_REALTIME_ALARM = 8;
const CLOCK_BOOTTIME_ALARM = 9;
const CLOCK_TAI = 11;