9195aa172b
Since aix/ppc64 has been added to GC toolchain, a mix between new and
old files were created in gcc toolchain.
This commit corrects this merge for aix/ppc64 and aix/ppc.
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/167658
From-SVN: r269797
113 lines
2.3 KiB
Go
113 lines
2.3 KiB
Go
// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build aix
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package runtime
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import "unsafe"
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type mOS struct {
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waitsema uintptr // semaphore for parking on locks
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}
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//extern malloc
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func libc_malloc(uintptr) unsafe.Pointer
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//go:noescape
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//extern sem_init
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func sem_init(sem *semt, pshared int32, value uint32) int32
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//go:noescape
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//extern sem_wait
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func sem_wait(sem *semt) int32
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//go:noescape
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//extern sem_post
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func sem_post(sem *semt) int32
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//go:noescape
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//extern sem_timedwait
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func sem_timedwait(sem *semt, timeout *timespec) int32
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//go:noescape
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//extern clock_gettime
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func clock_gettime(clock_id int64, timeout *timespec) int32
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//go:nosplit
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func semacreate(mp *m) {
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if mp.mos.waitsema != 0 {
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return
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}
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var sem *semt
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// Call libc's malloc rather than malloc. This will
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// allocate space on the C heap. We can't call malloc
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// here because it could cause a deadlock.
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sem = (*semt)(libc_malloc(unsafe.Sizeof(*sem)))
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if sem_init(sem, 0, 0) != 0 {
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throw("sem_init")
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}
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mp.mos.waitsema = uintptr(unsafe.Pointer(sem))
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}
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//go:nosplit
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func semasleep(ns int64) int32 {
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_m_ := getg().m
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if ns >= 0 {
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var ts timespec
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if clock_gettime(_CLOCK_REALTIME, &ts) != 0 {
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throw("clock_gettime")
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}
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sec := int64(ts.tv_sec) + ns/1e9
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nsec := int64(ts.tv_nsec) + ns%1e9
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if nsec >= 1e9 {
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sec++
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nsec -= 1e9
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}
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if sec != int64(timespec_sec_t(sec)) {
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// Handle overflows (timespec_sec_t is 32-bit in 32-bit applications)
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sec = 1<<31 - 1
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}
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ts.tv_sec = timespec_sec_t(sec)
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ts.tv_nsec = timespec_nsec_t(nsec)
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if sem_timedwait((*semt)(unsafe.Pointer(_m_.mos.waitsema)), &ts) != 0 {
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err := errno()
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if err == _ETIMEDOUT || err == _EAGAIN || err == _EINTR {
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return -1
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}
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println("sem_timedwait err ", err, " ts.tv_sec ", ts.tv_sec, " ts.tv_nsec ", ts.tv_nsec, " ns ", ns, " id ", _m_.id)
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throw("sem_timedwait")
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}
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return 0
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}
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for {
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r1 := sem_wait((*semt)(unsafe.Pointer(_m_.mos.waitsema)))
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if r1 == 0 {
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break
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}
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if errno() == _EINTR {
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continue
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}
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throw("sem_wait")
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}
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return 0
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}
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//go:nosplit
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func semawakeup(mp *m) {
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if sem_post((*semt)(unsafe.Pointer(mp.mos.waitsema))) != 0 {
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throw("sem_post")
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}
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}
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const (
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_CLOCK_REALTIME = 9
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_CLOCK_MONOTONIC = 10
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)
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