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[dev.cc] runtime: convert parallel support code from C to Go

Browse source 
The conversion was done with an automated tool and then
modified only as necessary to make it compile and run.

[This CL is part of the removal of C code from package runtime.
See golang.org/s/dev.cc for an overview.]

LGTM=r
R=r, austin
CC=dvyukov, golang-codereviews, iant, khr
https://golang.org/cl/172250043
This commit is contained in:
Russ Cox 2014-11-11 17:07:54 -05:00
parent 580ef3e4af
commit ece09790af
7 changed files with 281 additions and 366 deletions
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72
src/runtime/export_test.go
View file

@ -34,21 +34,11 @@ func lfstackpush_m()
func lfstackpop_m()
func LFStackPush(head *uint64, node *LFNode) {
mp := acquirem()
mp.ptrarg[0] = unsafe.Pointer(head)
mp.ptrarg[1] = unsafe.Pointer(node)
onM(lfstackpush_m)
releasem(mp)
lfstackpush(head, (*lfnode)(unsafe.Pointer(node)))
}
func LFStackPop(head *uint64) *LFNode {
mp := acquirem()
mp.ptrarg[0] = unsafe.Pointer(head)
onM(lfstackpop_m)
node := (*LFNode)(unsafe.Pointer(mp.ptrarg[0]))
mp.ptrarg[0] = nil
releasem(mp)
return node
return (*LFNode)(unsafe.Pointer(lfstackpop(head)))
}
type ParFor struct {
@ -68,64 +58,44 @@ func parfordo_m()
func parforiters_m()
func NewParFor(nthrmax uint32) *ParFor {
mp := acquirem()
mp.scalararg[0] = uintptr(nthrmax)
onM(newparfor_m)
desc := (*ParFor)(mp.ptrarg[0])
mp.ptrarg[0] = nil
releasem(mp)
var desc *ParFor
onM(func() {
desc = (*ParFor)(unsafe.Pointer(parforalloc(nthrmax)))
})
return desc
}
func ParForSetup(desc *ParFor, nthr, n uint32, ctx *byte, wait bool, body func(*ParFor, uint32)) {
mp := acquirem()
mp.ptrarg[0] = unsafe.Pointer(desc)
mp.ptrarg[1] = unsafe.Pointer(ctx)
mp.ptrarg[2] = unsafe.Pointer(funcPC(body)) // TODO(rsc): Should be a scalar.
mp.scalararg[0] = uintptr(nthr)
mp.scalararg[1] = uintptr(n)
mp.scalararg[2] = 0
if wait {
mp.scalararg[2] = 1
}
onM(parforsetup_m)
releasem(mp)
onM(func() {
parforsetup((*parfor)(unsafe.Pointer(desc)), nthr, n, unsafe.Pointer(ctx), wait,
*(*func(*parfor, uint32))(unsafe.Pointer(&body)))
})
}
func ParForDo(desc *ParFor) {
mp := acquirem()
mp.ptrarg[0] = unsafe.Pointer(desc)
onM(parfordo_m)
releasem(mp)
onM(func() {
parfordo((*parfor)(unsafe.Pointer(desc)))
})
}
func ParForIters(desc *ParFor, tid uint32) (uint32, uint32) {
mp := acquirem()
mp.ptrarg[0] = unsafe.Pointer(desc)
mp.scalararg[0] = uintptr(tid)
onM(parforiters_m)
begin := uint32(mp.scalararg[0])
end := uint32(mp.scalararg[1])
releasem(mp)
return begin, end
desc1 := (*parfor)(unsafe.Pointer(desc))
pos := desc_thr_index(desc1, tid).pos
return uint32(pos), uint32(pos >> 32)
}
// in mgc0.c
//go:noescape
func getgcmask(data unsafe.Pointer, typ *_type, array **byte, len *uint)
func GCMask(x interface{}) (ret []byte) {
e := (*eface)(unsafe.Pointer(&x))
s := (*slice)(unsafe.Pointer(&ret))
onM(func() {
getgcmask(e.data, e._type, &s.array, &s.len)
var len uintptr
getgcmask(e.data, e._type, &s.array, &len)
s.len = uint(len)
s.cap = s.len
})
return
}
func testSchedLocalQueue()
func testSchedLocalQueueSteal()
func RunSchedLocalQueueTest() {
onM(testSchedLocalQueue)
}
@ -149,10 +119,6 @@ func GogoBytes() int32 {
return _RuntimeGogoBytes
}
// in string.c
//go:noescape
func gostringw(w *uint16) string
// entry point for testing
func GostringW(w []uint16) (s string) {
onM(func() {