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runtime: remove unused scheduler knob

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Blockingsyscall was used in net package on windows,
it's not used anymore.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/12436043
This commit is contained in:
Dmitriy Vyukov 2013-08-04 23:32:40 +04:00
parent 0a904a3f2e
commit 49217cf5fd
2 changed files with 1 additions and 16 deletions
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13
src/pkg/runtime/cgocall.c
View File

@ -98,15 +98,6 @@ static void unwindm(void);
static void endcgo(void);
static FuncVal endcgoV = { endcgo };
// Gives a hint that the next syscall
// executed by the current goroutine will block.
// Currently used only on windows.
void
net·runtime_blockingSyscallHint(void)
{
g->blockingsyscall = true;
}
void
runtime·cgocall(void (*fn)(void*), void *arg)
{
@ -158,10 +149,6 @@ runtime·cgocall(void (*fn)(void*), void *arg)
* so it is safe to call while "in a system call", outside
* the $GOMAXPROCS accounting.
*/
if(g->blockingsyscall) {
g->blockingsyscall = false;
runtime·entersyscallblock();
} else
runtime·entersyscall();
runtime·asmcgocall(fn, arg);
runtime·exitsyscall();

2
src/pkg/runtime/runtime.h
View File

@ -269,7 +269,6 @@ struct G
bool ispanic;
bool issystem; // do not output in stack dump
bool isbackground; // ignore in deadlock detector
bool blockingsyscall; // hint that the next syscall will block
bool preempt; // preemption signal, duplicates stackguard0 = StackPreempt
int8 raceignore; // ignore race detection events
M* m; // for debuggers, but offset not hard-coded
@ -313,7 +312,6 @@ struct M
int32 dying;
int32 profilehz;
int32 helpgc;
bool blockingsyscall;
bool spinning;
uint32 fastrand;
uint64 ncgocall; // number of cgo calls in total