77 строки
1,2 КиБ
Go
77 строки
1,2 КиБ
Go
// +build darwin linux
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package runtime
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import (
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"unsafe"
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)
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//go:export putchar
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func _putchar(c int) int
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//go:export usleep
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func usleep(usec uint) int
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//go:export malloc
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func malloc(size uintptr) unsafe.Pointer
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//go:export abort
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func abort()
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//go:export clock_gettime
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func clock_gettime(clk_id uint, ts *timespec)
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const heapSize = 1 * 1024 * 1024 // 1MB to start
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var (
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heapStart = uintptr(malloc(heapSize))
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heapEnd = heapStart + heapSize
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)
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type timeUnit int64
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const tickMicros = 1
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// TODO: Linux/amd64-specific
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type timespec struct {
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tv_sec int64
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tv_nsec int64
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}
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const CLOCK_MONOTONIC_RAW = 4
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// Entry point for Go. Initialize all packages and call main.main().
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//go:export main
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func main() int {
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// Run initializers of all packages.
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initAll()
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// Compiler-generated call to main.main().
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callMain()
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// For libc compatibility.
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return 0
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}
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func putchar(c byte) {
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_putchar(int(c))
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}
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const asyncScheduler = false
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func sleepTicks(d timeUnit) {
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usleep(uint(d) / 1000)
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}
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// Return monotonic time in nanoseconds.
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//
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// TODO: noescape
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func monotime() uint64 {
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ts := timespec{}
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clock_gettime(CLOCK_MONOTONIC_RAW, &ts)
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return uint64(ts.tv_sec)*1000*1000*1000 + uint64(ts.tv_nsec)
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}
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func ticks() timeUnit {
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return timeUnit(monotime())
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}
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