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// 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;
}
}
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