2010-10-18 10:32:55 -06:00
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// Copyright 2010 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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#include "runtime.h"
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2011-12-16 13:33:58 -07:00
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#include "os_GOOS.h"
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#include "arch_GOARCH.h"
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2013-08-12 14:47:18 -06:00
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#include "../../cmd/ld/textflag.h"
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2010-10-18 10:32:55 -06:00
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int8 *goos = "plan9";
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2013-01-30 03:53:56 -07:00
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extern SigTab runtime·sigtab[];
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2012-05-04 04:48:34 -06:00
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int32 runtime·postnote(int32, int8*);
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2010-10-18 10:32:55 -06:00
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2013-02-21 05:24:38 -07:00
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// Called to initialize a new m (including the bootstrap m).
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// Called on the parent thread (main thread in case of bootstrap), can allocate memory.
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2010-10-18 10:32:55 -06:00
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void
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2013-02-21 05:24:38 -07:00
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runtime·mpreinit(M *mp)
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2010-10-18 10:32:55 -06:00
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{
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2013-01-30 03:53:56 -07:00
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// Initialize stack and goroutine for note handling.
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2013-02-21 05:24:38 -07:00
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mp->gsignal = runtime·malg(32*1024);
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mp->notesig = (int8*)runtime·malloc(ERRMAX*sizeof(int8));
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2013-03-07 16:54:44 -07:00
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// Initialize stack for handling strings from the
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// errstr system call, as used in package syscall.
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mp->errstr = (byte*)runtime·malloc(ERRMAX*sizeof(byte));
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2013-02-21 05:24:38 -07:00
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}
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2013-01-30 03:53:56 -07:00
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2013-02-21 05:24:38 -07:00
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// Called to initialize a new m (including the bootstrap m).
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// Called on the new thread, can not allocate memory.
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void
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runtime·minit(void)
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{
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2012-10-05 14:23:30 -06:00
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// Mask all SSE floating-point exceptions
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// when running on the 64-bit kernel.
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runtime·setfpmasks();
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2010-10-18 10:32:55 -06:00
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}
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2013-02-20 15:48:23 -07:00
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// Called from dropm to undo the effect of an minit.
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void
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runtime·unminit(void)
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{
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}
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2011-10-05 10:07:44 -06:00
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static int32
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getproccount(void)
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{
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int32 fd, i, n, ncpu;
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byte buf[2048];
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2013-03-12 12:03:16 -06:00
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fd = runtime·open("/dev/sysstat", OREAD, 0);
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2011-10-05 10:07:44 -06:00
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if(fd < 0)
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return 1;
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ncpu = 0;
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for(;;) {
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n = runtime·read(fd, buf, sizeof buf);
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if(n <= 0)
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break;
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for(i = 0; i < n; i++) {
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if(buf[i] == '\n')
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ncpu++;
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}
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}
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runtime·close(fd);
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return ncpu > 0 ? ncpu : 1;
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}
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2012-05-04 04:48:34 -06:00
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static int32
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getpid(void)
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{
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byte b[20], *c;
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2012-05-16 16:09:28 -06:00
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int32 fd;
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2012-05-04 04:48:34 -06:00
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runtime·memclr(b, sizeof(b));
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2013-03-12 12:03:16 -06:00
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fd = runtime·open("#c/pid", 0, 0);
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2012-05-04 04:48:34 -06:00
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if(fd >= 0) {
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runtime·read(fd, b, sizeof(b));
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runtime·close(fd);
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}
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c = b;
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while(*c == ' ' || *c == '\t')
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c++;
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return runtime·atoi(c);
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}
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2010-10-18 10:32:55 -06:00
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void
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runtime: ,s/[a-zA-Z0-9_]+/runtime·&/g, almost
Prefix all external symbols in runtime by runtime·,
to avoid conflicts with possible symbols of the same
name in linked-in C libraries. The obvious conflicts
are printf, malloc, and free, but hide everything to
avoid future pain.
The symbols left alone are:
** known to cgo **
_cgo_free
_cgo_malloc
libcgo_thread_start
initcgo
ncgocall
** known to linker **
_rt0_$GOARCH
_rt0_$GOARCH_$GOOS
text
etext
data
end
pclntab
epclntab
symtab
esymtab
** known to C compiler **
_divv
_modv
_div64by32
etc (arch specific)
Tested on darwin/386, darwin/amd64, linux/386, linux/amd64.
Built (but not tested) for freebsd/386, freebsd/amd64, linux/arm, windows/386.
R=r, PeterGo
CC=golang-dev
https://golang.org/cl/2899041
2010-11-04 12:00:19 -06:00
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runtime·osinit(void)
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2010-10-18 10:32:55 -06:00
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{
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2011-10-05 10:07:44 -06:00
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runtime·ncpu = getproccount();
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2012-05-04 04:48:34 -06:00
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m->procid = getpid();
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2013-01-30 03:53:56 -07:00
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runtime·notify(runtime·sigtramp);
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2010-10-18 10:32:55 -06:00
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}
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2013-03-14 23:11:03 -06:00
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void
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runtime·crash(void)
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{
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runtime·notify(nil);
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*(int32*)0 = 0;
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}
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2013-03-12 12:03:16 -06:00
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void
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runtime·get_random_data(byte **rnd, int32 *rnd_len)
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{
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*rnd = nil;
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*rnd_len = 0;
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}
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2011-01-11 17:48:15 -07:00
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void
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runtime·goenvs(void)
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{
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}
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2010-10-18 10:32:55 -06:00
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void
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os/signal: selective signal handling
Restore package os/signal, with new API:
Notify replaces Incoming, allowing clients
to ask for certain signals only. Also, signals
go to everyone who asks, not just one client.
This could plausibly move into package os now
that there are no magic side effects as a result
of the import.
Update runtime for new API: move common Unix
signal handling code into signal_unix.c.
(It's so easy to do this now that we don't have
to edit Makefiles!)
Tested on darwin,linux 386,amd64.
Fixes #1266.
R=r, dsymonds, bradfitz, iant, borman
CC=golang-dev
https://golang.org/cl/3749041
2012-02-13 11:52:37 -07:00
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runtime·initsig(void)
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2011-10-05 10:07:44 -06:00
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{
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}
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2013-08-12 14:47:18 -06:00
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#pragma textflag NOSPLIT
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2011-10-05 10:07:44 -06:00
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void
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runtime·osyield(void)
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2010-10-18 10:32:55 -06:00
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{
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2011-10-05 10:07:44 -06:00
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runtime·sleep(0);
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}
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2013-08-12 14:47:18 -06:00
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#pragma textflag NOSPLIT
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2011-10-05 10:07:44 -06:00
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void
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runtime·usleep(uint32 µs)
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{
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uint32 ms;
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ms = µs/1000;
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if(ms == 0)
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ms = 1;
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runtime·sleep(ms);
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2010-10-18 10:32:55 -06:00
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}
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2011-12-12 14:12:22 -07:00
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void
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time·now(int64 sec, int32 nsec)
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{
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int64 ns;
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ns = runtime·nanotime();
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sec = ns / 1000000000LL;
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nsec = ns - sec * 1000000000LL;
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FLUSH(&sec);
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FLUSH(&nsec);
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}
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2010-10-18 10:32:55 -06:00
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void
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2012-05-04 04:48:34 -06:00
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runtime·itoa(int32 n, byte *p, uint32 len)
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{
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byte *q, c;
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uint32 i;
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if(len <= 1)
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return;
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runtime·memclr(p, len);
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q = p;
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if(n==0) {
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*q++ = '0';
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USED(q);
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return;
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}
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if(n < 0) {
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*q++ = '-';
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p++;
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n = -n;
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}
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for(i=0; n > 0 && i < len; i++) {
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*q++ = '0' + (n%10);
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n = n/10;
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}
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for(q--; q >= p; ) {
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c = *p;
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*p++ = *q;
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*q-- = c;
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}
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}
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void
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2013-01-30 03:53:56 -07:00
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runtime·goexitsall(int8 *status)
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2012-05-04 04:48:34 -06:00
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{
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2012-12-18 09:30:29 -07:00
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M *mp;
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2012-05-04 04:48:34 -06:00
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int32 pid;
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pid = getpid();
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2012-12-18 09:30:29 -07:00
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for(mp=runtime·atomicloadp(&runtime·allm); mp; mp=mp->alllink)
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if(mp->procid != pid)
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2013-01-30 03:53:56 -07:00
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runtime·postnote(mp->procid, status);
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2012-05-04 04:48:34 -06:00
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}
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int32
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runtime·postnote(int32 pid, int8* msg)
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{
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2013-08-06 05:49:03 -06:00
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int32 fd;
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intgo len;
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2011-06-10 01:23:54 -06:00
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uint8 buf[128];
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uint8 tmp[16];
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uint8 *p, *q;
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runtime: add timer support, use for package time
This looks like it is just moving some code from
time to runtime (and translating it to C), but the
runtime can do a better job managing the goroutines,
and it needs this functionality for its own maintenance
(for example, for the garbage collector to hand back
unused memory to the OS on a time delay).
Might as well have just one copy of the timer logic,
and runtime can't depend on time, so vice versa.
It also unifies Sleep, NewTicker, and NewTimer behind
one mechanism, so that there are no claims that one
is more efficient than another. (For example, today
people recommend using time.After instead of time.Sleep
to avoid blocking an OS thread.)
Fixes #1644.
Fixes #1731.
Fixes #2190.
R=golang-dev, r, hectorchu, iant, iant, jsing, alex.brainman, dvyukov
CC=golang-dev
https://golang.org/cl/5334051
2011-11-09 13:17:05 -07:00
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2011-06-10 01:23:54 -06:00
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runtime·memclr(buf, sizeof buf);
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2012-05-04 04:48:34 -06:00
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/* build path string /proc/pid/note */
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q = tmp;
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2011-06-10 01:23:54 -06:00
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p = buf;
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2012-05-04 04:48:34 -06:00
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runtime·itoa(pid, tmp, sizeof tmp);
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2011-07-12 18:30:40 -06:00
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runtime·memmove((void*)p, (void*)"/proc/", 6);
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2012-05-04 04:48:34 -06:00
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for(p += 6; *p++ = *q++; );
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p--;
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runtime·memmove((void*)p, (void*)"/note", 5);
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runtime: add timer support, use for package time
This looks like it is just moving some code from
time to runtime (and translating it to C), but the
runtime can do a better job managing the goroutines,
and it needs this functionality for its own maintenance
(for example, for the garbage collector to hand back
unused memory to the OS on a time delay).
Might as well have just one copy of the timer logic,
and runtime can't depend on time, so vice versa.
It also unifies Sleep, NewTicker, and NewTimer behind
one mechanism, so that there are no claims that one
is more efficient than another. (For example, today
people recommend using time.After instead of time.Sleep
to avoid blocking an OS thread.)
Fixes #1644.
Fixes #1731.
Fixes #2190.
R=golang-dev, r, hectorchu, iant, iant, jsing, alex.brainman, dvyukov
CC=golang-dev
https://golang.org/cl/5334051
2011-11-09 13:17:05 -07:00
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2013-03-12 12:03:16 -06:00
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fd = runtime·open((int8*)buf, OWRITE, 0);
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2012-05-04 04:48:34 -06:00
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if(fd < 0)
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return -1;
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len = runtime·findnull((byte*)msg);
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if(runtime·write(fd, msg, len) != len) {
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runtime·close(fd);
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return -1;
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}
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runtime·close(fd);
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return 0;
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}
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void
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runtime·exit(int32 e)
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{
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byte tmp[16];
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2013-01-30 03:53:56 -07:00
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int8 *status;
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2012-05-04 04:48:34 -06:00
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if(e == 0)
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2013-01-30 03:53:56 -07:00
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status = "";
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2012-05-04 04:48:34 -06:00
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else {
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/* build error string */
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runtime·itoa(e, tmp, sizeof tmp);
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2013-01-30 03:53:56 -07:00
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status = (int8*)tmp;
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2012-05-04 04:48:34 -06:00
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}
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2013-01-30 03:53:56 -07:00
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runtime·goexitsall(status);
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runtime·exits(status);
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2010-10-18 10:32:55 -06:00
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}
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void
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2013-03-01 09:44:43 -07:00
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runtime·newosproc(M *mp, void *stk)
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2010-10-18 10:32:55 -06:00
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{
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2012-12-18 09:30:29 -07:00
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mp->tls[0] = mp->id; // so 386 asm can find it
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2010-10-18 10:32:55 -06:00
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if(0){
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2013-03-01 09:57:50 -07:00
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runtime·printf("newosproc stk=%p m=%p g=%p rfork=%p id=%d/%d ostk=%p\n",
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stk, mp, mp->g0, runtime·rfork, mp->id, (int32)mp->tls[0], &mp);
|
runtime: add timer support, use for package time
This looks like it is just moving some code from
time to runtime (and translating it to C), but the
runtime can do a better job managing the goroutines,
and it needs this functionality for its own maintenance
(for example, for the garbage collector to hand back
unused memory to the OS on a time delay).
Might as well have just one copy of the timer logic,
and runtime can't depend on time, so vice versa.
It also unifies Sleep, NewTicker, and NewTimer behind
one mechanism, so that there are no claims that one
is more efficient than another. (For example, today
people recommend using time.After instead of time.Sleep
to avoid blocking an OS thread.)
Fixes #1644.
Fixes #1731.
Fixes #2190.
R=golang-dev, r, hectorchu, iant, iant, jsing, alex.brainman, dvyukov
CC=golang-dev
https://golang.org/cl/5334051
2011-11-09 13:17:05 -07:00
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}
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2013-03-01 09:44:43 -07:00
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if(runtime·rfork(RFPROC|RFMEM|RFNOWAIT, stk, mp, mp->g0, runtime·mstart) < 0)
|
runtime: ,s/[a-zA-Z0-9_]+/runtime·&/g, almost
Prefix all external symbols in runtime by runtime·,
to avoid conflicts with possible symbols of the same
name in linked-in C libraries. The obvious conflicts
are printf, malloc, and free, but hide everything to
avoid future pain.
The symbols left alone are:
** known to cgo **
_cgo_free
_cgo_malloc
libcgo_thread_start
initcgo
ncgocall
** known to linker **
_rt0_$GOARCH
_rt0_$GOARCH_$GOOS
text
etext
data
end
pclntab
epclntab
symtab
esymtab
** known to C compiler **
_divv
_modv
_div64by32
etc (arch specific)
Tested on darwin/386, darwin/amd64, linux/386, linux/amd64.
Built (but not tested) for freebsd/386, freebsd/amd64, linux/arm, windows/386.
R=r, PeterGo
CC=golang-dev
https://golang.org/cl/2899041
2010-11-04 12:00:19 -06:00
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runtime·throw("newosproc: rfork failed");
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2010-10-18 10:32:55 -06:00
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}
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2011-11-02 07:42:01 -06:00
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uintptr
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runtime·semacreate(void)
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2010-10-18 10:32:55 -06:00
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{
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2011-11-02 07:42:01 -06:00
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return 1;
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2010-10-18 10:32:55 -06:00
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}
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2013-08-12 14:47:18 -06:00
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#pragma textflag NOSPLIT
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runtime: add timer support, use for package time
This looks like it is just moving some code from
time to runtime (and translating it to C), but the
runtime can do a better job managing the goroutines,
and it needs this functionality for its own maintenance
(for example, for the garbage collector to hand back
unused memory to the OS on a time delay).
Might as well have just one copy of the timer logic,
and runtime can't depend on time, so vice versa.
It also unifies Sleep, NewTicker, and NewTimer behind
one mechanism, so that there are no claims that one
is more efficient than another. (For example, today
people recommend using time.After instead of time.Sleep
to avoid blocking an OS thread.)
Fixes #1644.
Fixes #1731.
Fixes #2190.
R=golang-dev, r, hectorchu, iant, iant, jsing, alex.brainman, dvyukov
CC=golang-dev
https://golang.org/cl/5334051
2011-11-09 13:17:05 -07:00
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int32
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runtime·semasleep(int64 ns)
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2010-10-18 10:32:55 -06:00
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{
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runtime: add timer support, use for package time
This looks like it is just moving some code from
time to runtime (and translating it to C), but the
runtime can do a better job managing the goroutines,
and it needs this functionality for its own maintenance
(for example, for the garbage collector to hand back
unused memory to the OS on a time delay).
Might as well have just one copy of the timer logic,
and runtime can't depend on time, so vice versa.
It also unifies Sleep, NewTicker, and NewTimer behind
one mechanism, so that there are no claims that one
is more efficient than another. (For example, today
people recommend using time.After instead of time.Sleep
to avoid blocking an OS thread.)
Fixes #1644.
Fixes #1731.
Fixes #2190.
R=golang-dev, r, hectorchu, iant, iant, jsing, alex.brainman, dvyukov
CC=golang-dev
https://golang.org/cl/5334051
2011-11-09 13:17:05 -07:00
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int32 ret;
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int32 ms;
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if(ns >= 0) {
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2013-07-29 12:22:34 -06:00
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ms = runtime·timediv(ns, 1000000, nil);
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2012-05-16 16:09:28 -06:00
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ret = runtime·plan9_tsemacquire(&m->waitsemacount, ms);
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runtime: add timer support, use for package time
This looks like it is just moving some code from
time to runtime (and translating it to C), but the
runtime can do a better job managing the goroutines,
and it needs this functionality for its own maintenance
(for example, for the garbage collector to hand back
unused memory to the OS on a time delay).
Might as well have just one copy of the timer logic,
and runtime can't depend on time, so vice versa.
It also unifies Sleep, NewTicker, and NewTimer behind
one mechanism, so that there are no claims that one
is more efficient than another. (For example, today
people recommend using time.After instead of time.Sleep
to avoid blocking an OS thread.)
Fixes #1644.
Fixes #1731.
Fixes #2190.
R=golang-dev, r, hectorchu, iant, iant, jsing, alex.brainman, dvyukov
CC=golang-dev
https://golang.org/cl/5334051
2011-11-09 13:17:05 -07:00
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if(ret == 1)
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return 0; // success
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return -1; // timeout or interrupted
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}
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2011-11-02 07:42:01 -06:00
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while(runtime·plan9_semacquire(&m->waitsemacount, 1) < 0) {
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2012-05-16 16:09:28 -06:00
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/* interrupted; try again (c.f. lock_sema.c) */
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2011-11-02 07:42:01 -06:00
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}
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runtime: add timer support, use for package time
This looks like it is just moving some code from
time to runtime (and translating it to C), but the
runtime can do a better job managing the goroutines,
and it needs this functionality for its own maintenance
(for example, for the garbage collector to hand back
unused memory to the OS on a time delay).
Might as well have just one copy of the timer logic,
and runtime can't depend on time, so vice versa.
It also unifies Sleep, NewTicker, and NewTimer behind
one mechanism, so that there are no claims that one
is more efficient than another. (For example, today
people recommend using time.After instead of time.Sleep
to avoid blocking an OS thread.)
Fixes #1644.
Fixes #1731.
Fixes #2190.
R=golang-dev, r, hectorchu, iant, iant, jsing, alex.brainman, dvyukov
CC=golang-dev
https://golang.org/cl/5334051
2011-11-09 13:17:05 -07:00
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return 0; // success
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2010-10-18 10:32:55 -06:00
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}
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void
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2011-11-02 07:42:01 -06:00
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runtime·semawakeup(M *mp)
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2010-10-18 10:32:55 -06:00
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{
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2011-11-02 07:42:01 -06:00
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runtime·plan9_semrelease(&mp->waitsemacount, 1);
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2010-10-18 10:32:55 -06:00
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}
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2011-04-25 14:58:00 -06:00
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void
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os·sigpipe(void)
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{
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runtime·throw("too many writes on closed pipe");
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}
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2011-07-25 22:52:46 -06:00
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void
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runtime·sigpanic(void)
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{
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2013-01-30 03:53:56 -07:00
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if(g->sigpc == 0)
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runtime·panicstring("call of nil func value");
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runtime·panicstring(m->notesig);
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if(g->sig == 1 || g->sig == 2)
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runtime·throw("fault");
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2011-07-25 22:52:46 -06:00
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}
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2011-11-17 20:09:28 -07:00
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int32
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runtime·read(int32 fd, void *buf, int32 nbytes)
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{
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return runtime·pread(fd, buf, nbytes, -1LL);
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}
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int32
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runtime·write(int32 fd, void *buf, int32 nbytes)
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{
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return runtime·pwrite(fd, buf, nbytes, -1LL);
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}
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2012-02-24 13:28:51 -07:00
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uintptr
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runtime·memlimit(void)
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{
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return 0;
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}
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2012-02-28 14:18:24 -07:00
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2013-05-27 00:11:59 -06:00
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#pragma dataflag 16 // no pointers
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2012-03-12 13:55:18 -06:00
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static int8 badsignal[] = "runtime: signal received on thread not created by Go.\n";
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// This runs on a foreign stack, without an m or a g. No stack split.
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2013-08-12 14:47:18 -06:00
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#pragma textflag NOSPLIT
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2012-03-12 13:55:18 -06:00
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void
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2013-07-11 14:39:39 -06:00
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runtime·badsignal2(void)
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2012-03-12 13:55:18 -06:00
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{
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runtime·pwrite(2, badsignal, sizeof badsignal - 1, -1LL);
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2013-01-30 03:53:56 -07:00
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runtime·exits(badsignal);
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2012-03-12 13:55:18 -06:00
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}
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