cleanup; sys.sleep can go.

R=r
OCL=15786
CL=15792

src/cmd/gc/sys.go

@@ -76,7 +76,6 @@ func	writefile(string, string) (bool);	// write string into file; boolean status
 func	bytestorune(*byte, int32, int32) (int32, int32);	// convert bytes to runes	
 func	stringtorune(string, int32, int32) (int32, int32);	// convert bytes to runes	
 
-func	sleep(ms int64);
 func	exit(int32);
 
 export
@@ -163,6 +162,5 @@ export
 	stringtorune
 
 	// system calls
-	sleep
 	exit
 	;

src/runtime/amd64_darwin.h

@@ -51,7 +51,6 @@ struct stat {	// really a stat64
 
 void bsdthread_create(void*, M*, G*, void(*)(void));
 void bsdthread_register(void);
-int64 select(int32, void*, void*, void*, struct timeval*);
 
 
 // Mach calls

src/runtime/amd64_linux.h

@@ -49,5 +49,4 @@ struct stat {
 // Linux-specific system calls
 int64	futex(uint32*, int32, uint32, struct timespec*, uint32*, uint32);
 int64	clone(int32, void*, M*, G*, void(*)(void));
-int64	select(int32, void*, void*, void*, struct timeval*);
 

src/runtime/rt1_amd64_darwin.c

@@ -204,16 +204,6 @@ unimplemented(int8 *name)
 	*(int32*)1231 = 1231;
 }
 
-void
-sys·sleep(int64 ms)
-{
-	struct timeval tv;
-
-	tv.tv_sec = ms/1000;
-	tv.tv_usec = ms%1000 * 1000;
-	select(0, nil, nil, nil, &tv);
-}
-
 // Thread-safe allocation of a semaphore.
 // Psema points at a kernel semaphore key.
 // It starts out zero, meaning no semaphore.

src/runtime/rt1_amd64_linux.c

@@ -440,16 +440,6 @@ newosproc(M *m, G *g, void *stk, void (*fn)(void))
 		*(int32*)123 = 123;
 }
 
-void
-sys·sleep(int64 ms)
-{
-	struct timeval tv;
-
-	tv.tv_sec = ms/1000;
-	tv.tv_usec = ms%1000 * 1000;
-	select(0, nil, nil, nil, &tv);
-}
-
 void
 osinit(void)
 {

src/runtime/sys_amd64_darwin.s

@@ -189,17 +189,6 @@ TEXT bsdthread_register(SB),7,$-8
 	CALL	notok(SB)
 	RET
 
-// int64 select(int32, void*, void*, void*, void*)
-TEXT select(SB),7,$0
-	MOVL	8(SP), DI
-	MOVQ	16(SP), SI
-	MOVQ	24(SP), DX
-	MOVQ	32(SP), R10
-	MOVQ	40(SP), R8
-	MOVL	$(0x2000000+407), AX	// select_nocancel
-	SYSCALL
-	RET
-
 // Mach system calls use 0x1000000 instead of the BSD's 0x2000000.
 
 // uint32 mach_msg_trap(void*, uint32, uint32, uint32, uint32, uint32, uint32)

src/runtime/sys_amd64_linux.s

@@ -182,17 +182,6 @@ TEXT clone(SB),7,$0
 	SYSCALL
 	JMP	-3(PC)	// keep exiting
 
-// int64 select(int32, void*, void*, void*, struct timeval*)
-TEXT select(SB),7,$0
-	MOVL	8(SP), DI
-	MOVQ	16(SP), SI
-	MOVQ	24(SP), DX
-	MOVQ	32(SP), R10
-	MOVQ	40(SP), R8
-	MOVL	$23, AX
-	SYSCALL
-	RET
-
 TEXT sigaltstack(SB),7,$-8
 	MOVQ	new+8(SP), DI
 	MOVQ	old+16(SP), SI