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// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package runtime
import "unsafe"
type mOS struct {
initialized bool
mutex pthreadmutex
cond pthreadcond
count int
}
func unimplemented(name string) {
println(name, "not implemented")
*(*int)(unsafe.Pointer(uintptr(1231))) = 1231
}
//go:nosplit
func semacreate(mp *m) {
if mp.initialized {
return
}
mp.initialized = true
if err := pthread_mutex_init(&mp.mutex, nil); err != 0 {
throw("pthread_mutex_init")
}
if err := pthread_cond_init(&mp.cond, nil); err != 0 {
throw("pthread_cond_init")
}
}
//go:nosplit
func semasleep(ns int64) int32 {
var start int64
if ns >= 0 {
start = nanotime()
}
mp := getg().m
pthread_mutex_lock(&mp.mutex)
for {
if mp.count > 0 {
mp.count--
pthread_mutex_unlock(&mp.mutex)
return 0
}
if ns >= 0 {
spent := nanotime() - start
if spent >= ns {
pthread_mutex_unlock(&mp.mutex)
return -1
}
var t timespec
t.set_nsec(ns - spent)
err := pthread_cond_timedwait_relative_np(&mp.cond, &mp.mutex, &t)
if err == _ETIMEDOUT {
pthread_mutex_unlock(&mp.mutex)
return -1
}
} else {
pthread_cond_wait(&mp.cond, &mp.mutex)
}
}
}
//go:nosplit
func semawakeup(mp *m) {
pthread_mutex_lock(&mp.mutex)
mp.count++
if mp.count > 0 {
pthread_cond_signal(&mp.cond)
}
pthread_mutex_unlock(&mp.mutex)
}
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