The implementation does not grab the lock,
if Once is already initalized.
Benchmark results on HP Z600 (2 x Xeon E5620, 8 HT cores, 2.40GHz)
are as follows:
benchmark old ns/op new ns/op delta
sync_test.BenchmarkOnce 187.00 14.00 -92.51%
sync_test.BenchmarkOnce-2 909.00 21.40 -97.65%
sync_test.BenchmarkOnce-4 3684.00 20.90 -99.43%
sync_test.BenchmarkOnce-8 5987.00 23.00 -99.62%
sync_test.BenchmarkOnce-16 5051.00 21.60 -99.57%
R=bradfitz, rsc
CC=golang-dev
https://golang.org/cl/4641066
including evaluation up the data tree (in this code all fields must be
in dot itself), plus more control structure, but the basics are in place.
R=rsc, r
CC=golang-dev
https://golang.org/cl/4665041
For both contended and uncontended case:
- support arbitrary number of cpus (not just 2)
- dynamic load balancing (improves stability)
- periodic execution of Gosched() to work around non-preemptiviness
For uncontended case eliminates possible false-sharing.
For contended case includes additional variation with some
amount of local work between mutex operations.
R=r, rsc
CC=golang-dev
https://golang.org/cl/4634093
This avoids allocation when writing to bytes.Buffers and bufio.Writers, for
example.
R=golang-dev, rsc, r, consalus, r
CC=golang-dev
https://golang.org/cl/4625068
#pragma varargck countpos f 1
says that the first argument to f is
the count of variadic arguments that follow.
#pragma varargck type f t
says that t is one of the allowed types for
a variadic argument to f.
(can be repeated)
combined, these can be used to check the
runtime.stdcall functions in the windows port
or in any other port that needs a vararg list of
uintptrs even on a 64-bit platform (where it is
very easy to pass a less-than-uintptr in the ...).
demo:
typedef unsigned int uintptr;
#pragma varargck countpos f 1
#pragma varargck type f uintptr
#pragma varargck type f void*
int f(int count, ...);
void *v;
char *p;
void
main(void)
{
f(1, v); // ok
f(1, main); // ok
f(1, p); // ok
f(2, v, v); // ok
f(2, v); // found 1 argument after count 2
f(1, 'a'); // invalid type INT in call to f
f(1, 0); // invalid type INT in call to f
}
R=ken, r, alex.brainman
CC=golang-dev
https://golang.org/cl/4634103
Change the signature of Split to have no count,
assuming a full split, and rename the existing
Split with a count to SplitN.
Do the same to package bytes.
Add a gofix module.
R=adg, dsymonds, alex.brainman, rsc
CC=golang-dev
https://golang.org/cl/4661051
I have written up a Marshal and MarshalIndent pair that should
closely reflect the way that Unmarshal works. I would love feedback
on making this code more accessible and efficient... I haven't used
reflecton on this scale before, so there is probably a lot of work
that can be done on that.
Some potentially controversial things:
- All tag names are lower-cased by default.
- Zero-valued struct values are skipped.
- No namespace prefix (o:tag, etc) mechanism is supplied.
- You are allowed to marshal non-struct values (even though unmarshal
cannot handle them).
- A tag for a non-XMLName struct field that isn't "attr", "chardata",
or "innerxml" is used as the name of the tag. This could wreak
havoc if you try to marshal a protobuf struct.
- The "innerxml" and "chardata" are inserted verbatim. If you try to
marshal something straight from unmarshal, the results could be
unexpected (remove "innerxml" support from Marshal would be one
possible solution).
R=rsc
CC=golang-dev
https://golang.org/cl/4539082
Permits serving from virtual filesystems, such as files linked
into a binary, or from a zip file.
Also adds a gofix for:
http.FileServer(root, prefix) -> http.StripPrefix(prefix, http.FileServer(http.Dir(root)))
R=r, rsc, gri, adg, dsymonds, r, gri
CC=golang-dev
https://golang.org/cl/4629047
Reader previously had cached an error from the underlying reader
and would return it on every subsequent call to Read. The Reader
will now return the error only once, and subsequent calls will result
in a new Read call to the underlying Reader.
Fixes#1934.
R=bradfitz, rogpeppe, rsc
CC=golang-dev
https://golang.org/cl/4528133
8a/a.h:
. Removed <u.h> and <libc.h> includes as they work better in "a.y".
. Made definition of EOF conditional as it's defined in the Plan 9
header files, but not elsewhere.
8a/a.y:
. Added <u.h> and <libc.h> because <stdio.h> in Plan 9 needs them.
Sequence <u.h>, <stdio.h>, <libc.h> recommended by RSC.
8a/lex.c:
. Added <u.h> and <libc.h> as now needed by "a.h".
. Dropped <ctype.h>.
cc/lexbody:
. exit() -> exits().
. Dropped unwanted incrementation.
cc/macbody:
. Adjusted a few format specifications.
R=rsc
CC=golang-dev
https://golang.org/cl/4644047
Previously we were snapshotting the TLS state into *Request
before we did the HTTP ReadRequest, the first Read of which
triggered the TLS handshake implicitly.
Fixes#1956
R=golang-dev, rsc
CC=agl, golang-dev
https://golang.org/cl/4630072
-test.benchtime allows to specify benchmark execution time.
-test.cpu allows to execute tests/benchmarks for several
values of GOMAXPROCS.
R=r, r, rsc
CC=golang-dev
https://golang.org/cl/4662046
did darwin on mac with older, not broken xcode.
did linux arm by copying diffs from linux 386.
did freebsd amd64 by copying diffs from freebsd 386.
R=golang-dev, r, mikioh.mikioh
CC=golang-dev
https://golang.org/cl/4629067
Documentation mentioned the obsolete package "crypto/block",
which has been replaced with "crypto/cipher".
R=golang-dev, agl
CC=golang-dev
https://golang.org/cl/4654064
- don't rely on /dev/stdin as the name for standard input
- employ EBNF extraction if the source contains tags
"cat source.html | ebnflint" works now
R=r
CC=golang-dev
https://golang.org/cl/4641075
Users of the Scan() infrastructure that employ ReadRune() rather than
Token() need a way to skip leading spaces and newlines as set by the
the parent, Fscan(), Fscanln, or Fscanf(). As the internal methods and
boolean flags are not exported, this new function was added here and
in the Int and Nat Scan() functions of the big package. (fmt.Rat did
not need change since it uses Token()) Also added Printf style format
code support to int types and tests for same to int_test.go
R=r, r, gri, mtj
CC=golang-dev
https://golang.org/cl/4634074
As rsc suggested after change 58a6bdac3d12 was committed, we
now read the first byte of Request.Body when the
Request.ContentLength is 0 to disambiguate between a truly
zero-length body and a body of unknown length where the user
didn't set the ContentLength field.
This was also causing the reverse proxy problem where incoming
requests (which always have a body, of private type http.body,
even for 0-lengthed requests) were being relayed to the http
Transport for fetching, which was serializing the request as a
chunked request (since ContentLength was 0 and Body was
non-nil)
Fixes#1999
R=golang-dev, kevlar
CC=golang-dev
https://golang.org/cl/4628063
RFC 1521 section 4 states "The type, subtype, and parameter names are not case sensitive.".
R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/4648047
grsec needs the FIXED flag to be provided to mmap, which
works now. That said, when the allocation fails to be made
in the specific address, we're still given back a writable
page. This change will unmap that page to avoid using
twice the amount of memory needed.
It'd also be pretty easy to avoid the extra system calls
once we detected that the flag is needed, but I'm not sure
if that edge case is worth the effort.
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/4634086
