From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- libgo/runtime/chan.goc | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 libgo/runtime/chan.goc (limited to 'libgo/runtime/chan.goc') diff --git a/libgo/runtime/chan.goc b/libgo/runtime/chan.goc new file mode 100644 index 000000000..da0bbfccb --- /dev/null +++ b/libgo/runtime/chan.goc @@ -0,0 +1,39 @@ +// Copyright 2010 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package runtime +#include "config.h" +#include "channel.h" + +typedef _Bool bool; +typedef unsigned char byte; +typedef struct __go_channel chan; + +/* Do a nonblocking channel receive. */ + +func chanrecv2(c *chan, val *byte) (pres bool) { + if (c->element_size > 8) { + return __go_receive_nonblocking_big(c, val); + } else { + struct __go_receive_nonblocking_small rs; + union { + char b[8]; + uint64_t v; + } u; + + rs = __go_receive_nonblocking_small (c); + if (!rs.__success) { + __builtin_memset(val, 0, c->element_size); + return 0; + } + u.v = rs.__val; +#ifndef WORDS_BIGENDIAN + __builtin_memcpy(val, u.b, c->element_size); +#else + __builtin_memcpy(val, u.b + 8 - c->element_size, + c->element_size); +#endif + return 1; + } +} -- cgit v1.2.3